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<div class="title">/data/users/matthijs/github_faiss/faiss/IndexIVFPQ.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">/* Copyright 2004-present Facebook. All Rights Reserved.</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> Inverted list structure.</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "IndexIVFPQ.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <cmath></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <cstdio></span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <cassert></span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <sys/mman.h></span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <algorithm></span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "Heap.h"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "utils.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "Clustering.h"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "IndexFlat.h"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "hamming.h"</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "FaissAssert.h"</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "AuxIndexStructures.h"</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>faiss {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">/*****************************************</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * IndexIVFPQ implementation</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> ******************************************/</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> IndexIVFPQ::IndexIVFPQ (Index * quantizer, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist,</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">size_t</span> M, <span class="keywordtype">size_t</span> nbits_per_idx):</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  IndexIVF (quantizer, d, nlist, METRIC_L2),</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  pq (d, M, nbits_per_idx)</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  FAISS_THROW_IF_NOT (nbits_per_idx <= 8);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a> = pq.code_size;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  by_residual = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  use_precomputed_table = 0;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  scan_table_threshold = 0;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  max_codes = 0; <span class="comment">// means unlimited</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  polysemous_training = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  do_polysemous_training = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  polysemous_ht = 0;</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> }</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
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<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662"> 65</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">IndexIVFPQ::train_residual</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">train_residual_o</a> (n, x, <span class="keyword">nullptr</span>);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
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<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917"> 71</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">IndexIVFPQ::train_residual_o</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> *residuals_2)</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> * x_in = x;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  x = <a class="code" href="namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6">fvecs_maybe_subsample</a> (</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, (<span class="keywordtype">size_t</span>*)&n, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">max_points_per_centroid</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>,</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  x, <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579">seed</a>);</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del_x (x_in == x ? <span class="keyword">nullptr</span> : x);</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *trainset;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del_residuals;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span>(<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) printf(<span class="stringliteral">"computing residuals\n"</span>);</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> * <a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> [n]; <span class="comment">// assignement to coarse centroids</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<idx_t></a> del (assign);</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, assign);</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">float</span> *residuals = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  del_residuals.set (residuals);</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = 0; i < n; i++)</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, residuals+i*d, assign[i]);</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  trainset = residuals;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  trainset = x;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  printf (<span class="stringliteral">"training %zdx%zd product quantizer on %ld vectors in %dD\n"</span>,</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, n, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a1e4056fa3938ed8c9fe701e90d94ad95">verbose</a> = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.train (n, trainset);</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a>) {</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  printf(<span class="stringliteral">"doing polysemous training for PQ\n"</span>);</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="structfaiss_1_1PolysemousTraining.html">PolysemousTraining</a> default_pt;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="structfaiss_1_1PolysemousTraining.html">PolysemousTraining</a> *pt = <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a>;</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (!pt) pt = &default_pt;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  pt-><a class="code" href="structfaiss_1_1PolysemousTraining.html#a995374ba2f0bc2738edae72ca9142f82">optimize_pq_for_hamming</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>, n, trainset);</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="comment">// prepare second-level residuals for refine PQ</span></div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span> (residuals_2) {</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  uint8_t *train_codes = <span class="keyword">new</span> uint8_t [<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a> * n];</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<uint8_t></a> del (train_codes);</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (trainset, train_codes, n);</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *xx = trainset + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordtype">float</span> * res = residuals_2 + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (train_codes + i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>, res);</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++)</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  res[j] = xx[j] - res[j];</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">precompute_table</a> ();</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">/* produce a binary signature based on the residual vector */</span></div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keywordtype">void</span> IndexIVFPQ::encode (<span class="keywordtype">long</span> key, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, uint8_t * code)<span class="keyword"> const</span></div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">float</span> residual_vec[<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (x, residual_vec, key);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">compute_code</a> (residual_vec, code);</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">else</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">compute_code</a> (x, code);</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> }</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div>
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<div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6"> 150</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">IndexIVFPQ::encode_multiple</a> (<span class="keywordtype">size_t</span> n, <span class="keywordtype">long</span> *keys,</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> * x, uint8_t * xcodes,</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordtype">bool</span> compute_keys)<span class="keyword"> const</span></div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> (compute_keys)</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, keys);</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">float</span> *residuals = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del (residuals);</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// TODO: parallelize?</span></div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i++)</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, residuals + i * d, keys[i]);</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (residuals, xcodes, n);</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (x, xcodes, n);</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  }</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> }</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
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<div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a"> 169</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">IndexIVFPQ::decode_multiple</a> (<span class="keywordtype">size_t</span> n, <span class="keyword">const</span> <span class="keywordtype">long</span> *keys,</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">const</span> uint8_t * xcodes, <span class="keywordtype">float</span> * x)<span class="keyword"> const</span></div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (xcodes, x, n);</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  std::vector<float> centroid (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (keys[i], centroid.data());</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">float</span> *xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++) {</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  xi [j] += centroid [j];</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> }</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
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<div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342"> 186</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">IndexIVFPQ::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids)</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> {</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (n, x, xids, <span class="keyword">nullptr</span>);</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> }</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
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<div class="line"><a name="l00192"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b"> 192</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">IndexIVFPQ::add_core_o</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordtype">float</span> *residuals_2, <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx)</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> {</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordtype">double</span> t0 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> * idx;</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<long></a> del_idx;</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (precomputed_idx) {</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  idx = precomputed_idx;</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">long</span> * idx0 = <span class="keyword">new</span> <span class="keywordtype">long</span> [n];</div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  del_idx.set (idx0);</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, idx0);</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  idx = idx0;</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordtype">double</span> t1 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  uint8_t * xcodes = <span class="keyword">new</span> uint8_t [n * <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>];</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<uint8_t></a> del_xcodes (xcodes);</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *to_encode = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del_to_encode;</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordtype">float</span> *residuals = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// TODO: parallelize?</span></div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span> (idx[i] < 0)</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  memset (residuals + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, 0, <span class="keyword">sizeof</span>(*residuals) * d);</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  x + i * d, residuals + i * d, idx[i]);</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  }</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  to_encode = residuals;</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  del_to_encode.set (to_encode);</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  to_encode = x;</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (to_encode, xcodes, n);</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordtype">double</span> t2 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">// TODO: parallelize?</span></div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordtype">size_t</span> n_ignore = 0;</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key = idx[i];</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (key < 0) {</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  n_ignore ++;</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> (residuals_2)</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  memset (residuals_2, 0, <span class="keyword">sizeof</span>(*residuals_2) * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="keywordtype">id</span> = xids ? xids[i] : <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> + i;</div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].push_back (<span class="keywordtype">id</span>);</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  uint8_t *code = xcodes + i * <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>;</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>; j++)</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  codes[key].push_back (code[j]);</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> (residuals_2) {</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordtype">float</span> *res2 = residuals_2 + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *xi = to_encode + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code, res2);</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++)</div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  res2[j] = xi[j] - res2[j];</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  }</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>)</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  direct_map.push_back (key << 32 | (<a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].size() - 1));</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordtype">double</span> t3 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">if</span>(<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordtype">char</span> comment[100] = {0};</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">if</span> (n_ignore > 0)</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  snprintf (comment, 100, <span class="stringliteral">"(%ld vectors ignored)"</span>, n_ignore);</div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  printf(<span class="stringliteral">" add_core times: %.3f %.3f %.3f %s\n"</span>,</div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  t1 - t0, t2 - t1, t3 - t2, comment);</div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += n;</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> }</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div>
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<div class="line"><a name="l00274"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a1df10e9e5f4ff0dabf283f19ad94bbd4"> 274</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1df10e9e5f4ff0dabf283f19ad94bbd4">IndexIVFPQ::reconstruct_n</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i0, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> ni, <span class="keywordtype">float</span> *recons)<span class="keyword"> const</span></div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  FAISS_THROW_IF_NOT (ni == 0 || (i0 >= 0 && i0 + ni <= <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>));</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  std::vector<float> centroid (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> key = 0; key < <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; key++) {</div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">const</span> std::vector<long> & idlist = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key];</div>
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keyword">const</span> uint8_t * code_line = codes[key].data();</div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">for</span> (<span class="keywordtype">long</span> ofs = 0; ofs < idlist.size(); ofs++) {</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = idlist[ofs];</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">if</span> (!(<span class="keywordtype">id</span> >= i0 && <span class="keywordtype">id</span> < i0 + ni)) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordtype">float</span> *r = recons + <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * (<span class="keywordtype">id</span> - i0);</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (key, centroid.data());</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code_line + ofs * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>, r);</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++) {</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  r[j] += centroid[j];</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code_line + ofs * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>, r);</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> }</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div>
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<div class="line"><a name="l00303"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a28ce697b1381eb7e7d7d25774a25e175"> 303</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a28ce697b1381eb7e7d7d25774a25e175">IndexIVFPQ::reconstruct</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key, <span class="keywordtype">float</span> * recons)<span class="keyword"> const</span></div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  FAISS_THROW_IF_NOT (direct_map.size() == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordtype">int</span> list_no = direct_map[key] >> 32;</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordtype">int</span> ofs = direct_map[key] & 0xffffffff;</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (list_no, recons);</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keyword">const</span> uint8_t * code = &(codes[list_no][ofs * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>]);</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> </div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m < <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>; m++) {</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordtype">float</span> * out = recons + m * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>;</div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> * cent = <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">get_centroids</a> (m, code[m]);</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>; i++) {</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  out[i] += cent[i];</div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  }</div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> }</div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div>
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<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> </div>
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<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div>
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<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div>
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<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div>
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<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"></span></div>
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<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment">/** Precomputed tables for residuals</span></div>
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<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> * During IVFPQ search with by_residual, we compute</span></div>
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<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"> * d = || x - y_C - y_R ||^2</span></div>
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<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment"> * where x is the query vector, y_C the coarse centroid, y_R the</span></div>
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<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment"> * refined PQ centroid. The expression can be decomposed as:</span></div>
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<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment"> * d = || x - y_C ||^2 + || y_R ||^2 + 2 * (y_C|y_R) - 2 * (x|y_R)</span></div>
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<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment"> * --------------- --------------------------- -------</span></div>
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<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"> * term 1 term 2 term 3</span></div>
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<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"> * When using multiprobe, we use the following decomposition:</span></div>
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<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment"> * - term 1 is the distance to the coarse centroid, that is computed</span></div>
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<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> * during the 1st stage search.</span></div>
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<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment"> * - term 2 can be precomputed, as it does not involve x. However,</span></div>
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<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment"> * because of the PQ, it needs nlist * M * ksub storage. This is why</span></div>
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<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment"> * use_precomputed_table is off by default</span></div>
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<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="comment"> * - term 3 is the classical non-residual distance table.</span></div>
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<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment"> * Since y_R defined by a product quantizer, it is split across</span></div>
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<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"> * subvectors and stored separately for each subvector. If the coarse</span></div>
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<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"> * quantizer is a MultiIndexQuantizer then the table can be stored</span></div>
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<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> * more compactly.</span></div>
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<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> * At search time, the tables for term 2 and term 3 are added up. This</span></div>
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<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"> * is faster when the length of the lists is > ksub * M.</span></div>
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<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div>
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<div class="line"><a name="l00356"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267"> 356</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">IndexIVFPQ::precompute_table</a> ()</div>
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<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> {</div>
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<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 0) { <span class="comment">// then choose the type of table</span></div>
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<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
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<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  fprintf(stderr, <span class="stringliteral">"IndexIVFPQ::precompute_table: WARN precomputed "</span></div>
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<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="stringliteral">"tables not needed for inner product quantizers\n"</span>);</div>
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<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  }</div>
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<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *miq =</div>
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<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *<span class="keyword">></span> (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>);</div>
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<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">if</span> (miq && <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> % miq->pq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> == 0)</div>
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<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 2;</div>
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<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 1;</div>
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<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  } <span class="comment">// otherwise assume user has set appropriate flag on input</span></div>
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<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div>
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<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
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<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  printf (<span class="stringliteral">"precomputing IVFPQ tables type %d\n"</span>,</div>
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<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a>);</div>
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<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div>
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<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> </div>
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<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="comment">// squared norms of the PQ centroids</span></div>
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<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  std::vector<float> r_norms (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, NAN);</div>
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<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m < <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>; m++)</div>
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<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; j++)</div>
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<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  r_norms [m * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a> + j] =</div>
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<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <a class="code" href="namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84">fvec_norm_L2sqr</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">get_centroids</a> (m, j), <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>);</div>
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<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div>
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<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 1) {</div>
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<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> </div>
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<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.resize (<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>);</div>
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<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  std::vector<float> centroid (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
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<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div>
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<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
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<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (i, centroid.data());</div>
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<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> </div>
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<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordtype">float</span> *tab = &<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>[i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>];</div>
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<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.compute_inner_prod_table (centroid.data(), tab);</div>
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<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, r_norms.data(), 2.0, tab, tab);</div>
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<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div>
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<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 2) {</div>
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<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *miq =</div>
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<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *<span class="keyword">></span> (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>);</div>
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<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  FAISS_THROW_IF_NOT (miq);</div>
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<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1ProductQuantizer.html">ProductQuantizer</a> &cpq = miq->pq;</div>
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<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> % cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> == 0);</div>
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<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div>
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<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.resize(cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>);</div>
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|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> </div>
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|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="comment">// reorder PQ centroid table</span></div>
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|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  std::vector<float> centroids (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, NAN);</div>
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<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> </div>
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<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m < cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>; m++) {</div>
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<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; i++) {</div>
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<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  memcpy (centroids.data() + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> + m * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>,</div>
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|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">get_centroids</a> (m, i),</div>
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<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keyword">sizeof</span> (*centroids.data()) * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>);</div>
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<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  }</div>
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<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div>
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<div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div>
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<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.compute_inner_prod_tables (cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, centroids.data (),</div>
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<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.data ());</div>
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<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div>
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<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; i++) {</div>
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<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordtype">float</span> *tab = &<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>[i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>];</div>
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<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, r_norms.data(), 2.0, tab, tab);</div>
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<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  }</div>
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<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> </div>
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<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  }</div>
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<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> }</div>
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<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> </div>
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<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> </div>
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<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="keyword">static</span> uint64_t get_cycles () {</div>
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<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  uint32_t high, low;</div>
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<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keyword">asm</span> <span class="keyword">volatile</span>(<span class="stringliteral">"rdtsc \n\t"</span></div>
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<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  : <span class="stringliteral">"=a"</span> (low),</div>
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<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="stringliteral">"=d"</span> (high));</div>
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<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">return</span> ((uint64_t)high << 32) | (low);</div>
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<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> }</div>
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<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> </div>
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<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="preprocessor">#define TIC t0 = get_cycles()</span></div>
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<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="preprocessor"></span><span class="preprocessor">#define TOC get_cycles () - t0</span></div>
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<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> </div>
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<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment"></span></div>
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<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment">/** QueryTables manages the various ways of searching an</span></div>
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<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment"> * IndexIVFPQ. The code contains a lot of branches, depending on:</span></div>
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<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment"> * - metric_type: are we computing L2 or Inner product similarity?</span></div>
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<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> <span class="comment"> * - by_residual: do we encode raw vectors or residuals?</span></div>
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<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="comment"> * - use_precomputed_table: are x_R|x_C tables precomputed?</span></div>
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|
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment"> * - polysemous_ht: are we filtering with polysemous codes?</span></div>
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<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="keyword">struct </span>QueryTables {</div>
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<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> </div>
|
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<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="comment">/*****************************************************</span></div>
|
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<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"> * General data from the IVFPQ</span></div>
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<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment"> *****************************************************/</span></div>
|
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<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> </div>
|
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<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keyword">const</span> IndexIVFPQ & ivfpq;</div>
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<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> </div>
|
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<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="comment">// copied from IndexIVFPQ for easier access</span></div>
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|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keywordtype">int</span> d;</div>
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<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keyword">const</span> ProductQuantizer & pq;</div>
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<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric_type;</div>
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<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordtype">bool</span> by_residual;</div>
|
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<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordtype">int</span> use_precomputed_table;</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="comment">// pre-allocated data buffers</span></div>
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|
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordtype">float</span> * sim_table, * sim_table_2;</div>
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<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordtype">float</span> * residual_vec, *decoded_vec;</div>
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<div class="line"><a name="l00467"></a><span class="lineno"> 467</span> </div>
|
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<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="comment">// single data buffer</span></div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  std::vector<float> mem;</div>
|
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<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> </div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="comment">// for table pointers</span></div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  std::vector<const float *> sim_table_ptrs;</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> </div>
|
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<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keyword">explicit</span> QueryTables (<span class="keyword">const</span> IndexIVFPQ & ivfpq):</div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  ivfpq(ivfpq),</div>
|
|
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  d(ivfpq.d),</div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  pq (ivfpq.pq),</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  metric_type (ivfpq.metric_type),</div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  by_residual (ivfpq.by_residual),</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  use_precomputed_table (ivfpq.use_precomputed_table)</div>
|
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<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  {</div>
|
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<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  mem.resize (pq.ksub * pq.M * 2 + d *2);</div>
|
|
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  sim_table = mem.data();</div>
|
|
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  sim_table_2 = sim_table + pq.ksub * pq.M;</div>
|
|
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  residual_vec = sim_table_2 + pq.ksub * pq.M;</div>
|
|
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  decoded_vec = residual_vec + d;</div>
|
|
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> </div>
|
|
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  <span class="comment">// for polysemous</span></div>
|
|
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">if</span> (ivfpq.polysemous_ht != 0) {</div>
|
|
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  q_code.resize (pq.code_size);</div>
|
|
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  }</div>
|
|
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  init_list_cycles = 0;</div>
|
|
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  sim_table_ptrs.resize (pq.M);</div>
|
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<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  }</div>
|
|
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> </div>
|
|
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="comment"> * What we do when query is known</span></div>
|
|
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> </div>
|
|
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="comment">// field specific to query</span></div>
|
|
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> * qi;</div>
|
|
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> </div>
|
|
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="comment">// query-specific intialization</span></div>
|
|
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordtype">void</span> init_query (<span class="keyword">const</span> <span class="keywordtype">float</span> * qi) {</div>
|
|
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  this->qi = qi;</div>
|
|
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
|
|
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  init_query_IP ();</div>
|
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<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  init_query_L2 ();</div>
|
|
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordflow">if</span> (!by_residual && ivfpq.polysemous_ht != 0)</div>
|
|
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  pq.compute_code (qi, q_code.data());</div>
|
|
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  }</div>
|
|
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> </div>
|
|
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordtype">void</span> init_query_IP () {</div>
|
|
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="comment">// precompute some tables specific to the query qi</span></div>
|
|
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  pq.compute_inner_prod_table (qi, sim_table);</div>
|
|
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="comment">// we compute negated inner products for use with the maxheap</span></div>
|
|
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < pq.ksub * pq.M; i++) {</div>
|
|
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  sim_table[i] = - sim_table[i];</div>
|
|
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  }</div>
|
|
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  }</div>
|
|
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span> </div>
|
|
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordtype">void</span> init_query_L2 () {</div>
|
|
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordflow">if</span> (!by_residual) {</div>
|
|
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  pq.compute_distance_table (qi, sim_table);</div>
|
|
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table) {</div>
|
|
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  pq.compute_inner_prod_table (qi, sim_table_2);</div>
|
|
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  }</div>
|
|
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  }</div>
|
|
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> </div>
|
|
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="comment"> * When inverted list is known: prepare computations</span></div>
|
|
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> </div>
|
|
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="comment">// fields specific to list</span></div>
|
|
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> key;</div>
|
|
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordtype">float</span> coarse_dis;</div>
|
|
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  std::vector<uint8_t> q_code;</div>
|
|
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span> </div>
|
|
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  uint64_t init_list_cycles;</div>
|
|
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> <span class="comment"> /// once we know the query and the centroid, we can prepare the</span></div>
|
|
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="comment"> /// sim_table that will be used for accumulation</span></div>
|
|
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> <span class="comment"> /// and dis0, the initial value</span></div>
|
|
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment"></span> <span class="keywordtype">float</span> precompute_list_tables () {</div>
|
|
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordtype">float</span> dis0 = 0;</div>
|
|
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  uint64_t t0; TIC;</div>
|
|
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">if</span> (by_residual) {</div>
|
|
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
|
|
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  dis0 = precompute_list_tables_IP ();</div>
|
|
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  dis0 = precompute_list_tables_L2 ();</div>
|
|
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  }</div>
|
|
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  init_list_cycles += TOC;</div>
|
|
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="keywordflow">return</span> dis0;</div>
|
|
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  }</div>
|
|
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> </div>
|
|
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keywordtype">float</span> precompute_list_table_pointers () {</div>
|
|
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordtype">float</span> dis0 = 0;</div>
|
|
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  uint64_t t0; TIC;</div>
|
|
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <span class="keywordflow">if</span> (by_residual) {</div>
|
|
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
|
|
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  FAISS_THROW_MSG (<span class="stringliteral">"not implemented"</span>);</div>
|
|
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  dis0 = precompute_list_table_pointers_L2 ();</div>
|
|
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  }</div>
|
|
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  init_list_cycles += TOC;</div>
|
|
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">return</span> dis0;</div>
|
|
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  }</div>
|
|
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> </div>
|
|
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="comment"> * compute tables for inner prod</span></div>
|
|
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> </div>
|
|
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordtype">float</span> precompute_list_tables_IP ()</div>
|
|
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  {</div>
|
|
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <span class="comment">// prepare the sim_table that will be used for accumulation</span></div>
|
|
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="comment">// and dis0, the initial value</span></div>
|
|
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  ivfpq.quantizer->reconstruct (key, decoded_vec);</div>
|
|
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="comment">// decoded_vec = centroid</span></div>
|
|
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordtype">float</span> dis0 = -fvec_inner_product (qi, decoded_vec, d);</div>
|
|
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> </div>
|
|
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordflow">if</span> (ivfpq.polysemous_ht) {</div>
|
|
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < d; i++) {</div>
|
|
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  residual_vec [i] = qi[i] - decoded_vec[i];</div>
|
|
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  }</div>
|
|
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  pq.compute_code (residual_vec, q_code.data());</div>
|
|
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  }</div>
|
|
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keywordflow">return</span> dis0;</div>
|
|
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  }</div>
|
|
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> </div>
|
|
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> </div>
|
|
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment"> * compute tables for L2 distance</span></div>
|
|
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> </div>
|
|
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="keywordtype">float</span> precompute_list_tables_L2 ()</div>
|
|
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  {</div>
|
|
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keywordtype">float</span> dis0 = 0;</div>
|
|
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> </div>
|
|
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="keywordflow">if</span> (use_precomputed_table == 0) {</div>
|
|
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  ivfpq.quantizer->compute_residual (qi, residual_vec, key);</div>
|
|
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  pq.compute_distance_table (residual_vec, sim_table);</div>
|
|
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 1) {</div>
|
|
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  dis0 = coarse_dis;</div>
|
|
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> </div>
|
|
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (pq.M * pq.ksub,</div>
|
|
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  &ivfpq.precomputed_table [key * pq.ksub * pq.M],</div>
|
|
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  -2.0, sim_table_2,</div>
|
|
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  sim_table);</div>
|
|
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 2) {</div>
|
|
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  dis0 = coarse_dis;</div>
|
|
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span> </div>
|
|
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keyword">const</span> MultiIndexQuantizer *miq =</div>
|
|
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>MultiIndexQuantizer *<span class="keyword">></span> (ivfpq.quantizer);</div>
|
|
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  FAISS_THROW_IF_NOT (miq);</div>
|
|
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <span class="keyword">const</span> ProductQuantizer &cpq = miq->pq;</div>
|
|
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keywordtype">int</span> Mf = pq.M / cpq.M;</div>
|
|
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> </div>
|
|
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *qtab = sim_table_2; <span class="comment">// query-specific table</span></div>
|
|
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keywordtype">float</span> *ltab = sim_table; <span class="comment">// (output) list-specific table</span></div>
|
|
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span> </div>
|
|
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  <span class="keywordtype">long</span> k = key;</div>
|
|
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> cm = 0; cm < cpq.M; cm++) {</div>
|
|
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="comment">// compute PQ index</span></div>
|
|
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <span class="keywordtype">int</span> ki = k & ((uint64_t(1) << cpq.nbits) - 1);</div>
|
|
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  k >>= cpq.nbits;</div>
|
|
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> </div>
|
|
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="comment">// get corresponding table</span></div>
|
|
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *pc = &ivfpq.precomputed_table</div>
|
|
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  [(ki * pq.M + cm * Mf) * pq.ksub];</div>
|
|
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> </div>
|
|
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  if (ivfpq.polysemous_ht == 0) {</div>
|
|
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> </div>
|
|
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="comment">// sum up with query-specific table</span></div>
|
|
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (Mf * pq.ksub,</div>
|
|
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  pc,</div>
|
|
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  -2.0, qtab,</div>
|
|
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  ltab);</div>
|
|
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  ltab += Mf * pq.ksub;</div>
|
|
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  qtab += Mf * pq.ksub;</div>
|
|
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = cm * Mf; m < (cm + 1) * Mf; m++) {</div>
|
|
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  q_code[m] = <a class="code" href="namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a">fvec_madd_and_argmin</a></div>
|
|
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  (pq.ksub, pc, -2, qtab, ltab);</div>
|
|
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  pc += pq.ksub;</div>
|
|
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  ltab += pq.ksub;</div>
|
|
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  qtab += pq.ksub;</div>
|
|
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  }</div>
|
|
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  }</div>
|
|
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> </div>
|
|
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  }</div>
|
|
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  }</div>
|
|
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span> </div>
|
|
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  <span class="keywordflow">return</span> dis0;</div>
|
|
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  }</div>
|
|
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span> </div>
|
|
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keywordtype">float</span> precompute_list_table_pointers_L2 ()</div>
|
|
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  {</div>
|
|
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <span class="keywordtype">float</span> dis0 = 0;</div>
|
|
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span> </div>
|
|
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">if</span> (use_precomputed_table == 1) {</div>
|
|
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  dis0 = coarse_dis;</div>
|
|
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> </div>
|
|
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> * s = &ivfpq.precomputed_table [key * pq.ksub * pq.M];</div>
|
|
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m < pq.M; m++) {</div>
|
|
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  sim_table_ptrs [m] = s;</div>
|
|
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  s += pq.ksub;</div>
|
|
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  }</div>
|
|
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 2) {</div>
|
|
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  dis0 = coarse_dis;</div>
|
|
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span> </div>
|
|
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keyword">const</span> MultiIndexQuantizer *miq =</div>
|
|
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>MultiIndexQuantizer *<span class="keyword">></span> (ivfpq.quantizer);</div>
|
|
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  FAISS_THROW_IF_NOT (miq);</div>
|
|
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="keyword">const</span> ProductQuantizer &cpq = miq->pq;</div>
|
|
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keywordtype">int</span> Mf = pq.M / cpq.M;</div>
|
|
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span> </div>
|
|
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <span class="keywordtype">long</span> k = key;</div>
|
|
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordtype">int</span> m0 = 0;</div>
|
|
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> cm = 0; cm < cpq.M; cm++) {</div>
|
|
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="keywordtype">int</span> ki = k & ((uint64_t(1) << cpq.nbits) - 1);</div>
|
|
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  k >>= cpq.nbits;</div>
|
|
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> </div>
|
|
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *pc = &ivfpq.precomputed_table</div>
|
|
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  [(ki * pq.M + cm * Mf) * pq.ksub];</div>
|
|
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> </div>
|
|
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  for (<span class="keywordtype">int</span> m = m0; m < m0 + Mf; m++) {</div>
|
|
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  sim_table_ptrs [m] = pc;</div>
|
|
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  pc += pq.ksub;</div>
|
|
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  }</div>
|
|
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  m0 += Mf;</div>
|
|
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  }</div>
|
|
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  FAISS_THROW_MSG (<span class="stringliteral">"need precomputed tables"</span>);</div>
|
|
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  }</div>
|
|
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span> </div>
|
|
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">if</span> (ivfpq.polysemous_ht) {</div>
|
|
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  FAISS_THROW_MSG (<span class="stringliteral">"not implemented"</span>);</div>
|
|
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="comment">// Not clear that it makes sense to implemente this,</span></div>
|
|
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="comment">// because it costs M * ksub, which is what we wanted to</span></div>
|
|
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="comment">// avoid with the tables pointers.</span></div>
|
|
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  }</div>
|
|
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> </div>
|
|
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordflow">return</span> dis0;</div>
|
|
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  }</div>
|
|
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> </div>
|
|
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span> </div>
|
|
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> };</div>
|
|
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> </div>
|
|
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> </div>
|
|
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="comment"> * Scaning the codes.</span></div>
|
|
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span> <span class="comment"> * The scanning functions call their favorite precompute_*</span></div>
|
|
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="comment"> * function to precompute the tables they need.</span></div>
|
|
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IDType></div>
|
|
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="keyword">struct </span>InvertedListScanner: QueryTables {</div>
|
|
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> </div>
|
|
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keyword">const</span> uint8_t * __restrict list_codes;</div>
|
|
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  <span class="keyword">const</span> IDType * list_ids;</div>
|
|
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordtype">size_t</span> list_size;</div>
|
|
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span> </div>
|
|
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <span class="keyword">explicit</span> InvertedListScanner (<span class="keyword">const</span> IndexIVFPQ & ivfpq):</div>
|
|
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  QueryTables (ivfpq)</div>
|
|
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  {</div>
|
|
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  FAISS_THROW_IF_NOT (pq.byte_per_idx == 1);</div>
|
|
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  n_hamming_pass = 0;</div>
|
|
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  }</div>
|
|
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span> <span class="comment"> /// list_specific intialization</span></div>
|
|
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="comment"></span> <span class="keywordtype">void</span> init_list (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> key, <span class="keywordtype">float</span> coarse_dis,</div>
|
|
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <span class="keywordtype">size_t</span> list_size_in, <span class="keyword">const</span> IDType *list_ids_in,</div>
|
|
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <span class="keyword">const</span> uint8_t *list_codes_in) {</div>
|
|
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  this->key = key;</div>
|
|
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  this->coarse_dis = coarse_dis;</div>
|
|
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  list_size = list_size_in;</div>
|
|
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  list_codes = list_codes_in;</div>
|
|
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  list_ids = list_ids_in;</div>
|
|
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  }</div>
|
|
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> </div>
|
|
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span> <span class="comment"> * Scaning the codes: simple PQ scan.</span></div>
|
|
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span> <span class="comment"> /// version of the scan where we use precomputed tables</span></div>
|
|
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="comment"></span> <span class="keywordtype">void</span> scan_list_with_table (</div>
|
|
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <span class="keywordtype">size_t</span> k, <span class="keywordtype">float</span> * heap_sim, <span class="keywordtype">long</span> * heap_ids, <span class="keywordtype">bool</span> store_pairs)</div>
|
|
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  {</div>
|
|
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keywordtype">float</span> dis0 = precompute_list_tables ();</div>
|
|
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> </div>
|
|
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < list_size; j++) {</div>
|
|
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
|
|
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="keywordtype">float</span> dis = dis0;</div>
|
|
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table;</div>
|
|
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span> </div>
|
|
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m < pq.M; m++) {</div>
|
|
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  dis += tab[*list_codes++];</div>
|
|
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  tab += pq.ksub;</div>
|
|
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  }</div>
|
|
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span> </div>
|
|
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordflow">if</span> (dis < heap_sim[0]) {</div>
|
|
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  maxheap_pop (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = store_pairs ? (key << 32 | j) : list_ids[j];</div>
|
|
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  maxheap_push (k, heap_sim, heap_ids, dis, <span class="keywordtype">id</span>);</div>
|
|
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  }</div>
|
|
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  }</div>
|
|
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  }</div>
|
|
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> </div>
|
|
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span> <span class="comment"> /// tables are not precomputed, but pointers are provided to the</span></div>
|
|
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span> <span class="comment"> /// relevant X_c|x_r tables</span></div>
|
|
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span> <span class="comment"></span> <span class="keywordtype">void</span> scan_list_with_pointer (</div>
|
|
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordtype">size_t</span> k, <span class="keywordtype">float</span> * heap_sim, <span class="keywordtype">long</span> * heap_ids, <span class="keywordtype">bool</span> store_pairs)</div>
|
|
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  {</div>
|
|
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span> </div>
|
|
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  <span class="keywordtype">float</span> dis0 = precompute_list_table_pointers ();</div>
|
|
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span> </div>
|
|
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < list_size; j++) {</div>
|
|
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span> </div>
|
|
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="keywordtype">float</span> dis = dis0;</div>
|
|
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table_2;</div>
|
|
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span> </div>
|
|
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m < pq.M; m++) {</div>
|
|
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  <span class="keywordtype">int</span> ci = *list_codes++;</div>
|
|
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  dis += sim_table_ptrs [m][ci] - 2 * tab [ci];</div>
|
|
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  tab += pq.ksub;</div>
|
|
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  }</div>
|
|
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> </div>
|
|
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="keywordflow">if</span> (dis < heap_sim[0]) {</div>
|
|
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  maxheap_pop (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = store_pairs ? (key << 32 | j) : list_ids[j];</div>
|
|
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  maxheap_push (k, heap_sim, heap_ids, dis, <span class="keywordtype">id</span>);</div>
|
|
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  }</div>
|
|
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  }</div>
|
|
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span> </div>
|
|
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  }</div>
|
|
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span> <span class="comment"> /// nothing is precomputed: access residuals on-the-fly</span></div>
|
|
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span> <span class="comment"></span> <span class="keywordtype">void</span> scan_on_the_fly_dist (</div>
|
|
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <span class="keywordtype">size_t</span> k, <span class="keywordtype">float</span> * heap_sim, <span class="keywordtype">long</span> * heap_ids, <span class="keywordtype">bool</span> store_pairs)</div>
|
|
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  {</div>
|
|
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span> </div>
|
|
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  <span class="keywordflow">if</span> (by_residual && use_precomputed_table) {</div>
|
|
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  scan_list_with_pointer (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  }</div>
|
|
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span> </div>
|
|
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *dvec;</div>
|
|
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  <span class="keywordtype">float</span> dis0 = 0;</div>
|
|
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span> </div>
|
|
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keywordflow">if</span> (by_residual) {</div>
|
|
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT) {</div>
|
|
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  ivfpq.quantizer->reconstruct (key, residual_vec);</div>
|
|
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  dis0 = fvec_inner_product (residual_vec, qi, d);</div>
|
|
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  ivfpq.quantizer->compute_residual (qi, residual_vec, key);</div>
|
|
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  }</div>
|
|
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  dvec = residual_vec;</div>
|
|
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  dvec = qi;</div>
|
|
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  dis0 = 0;</div>
|
|
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  }</div>
|
|
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span> </div>
|
|
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < list_size; j++) {</div>
|
|
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span> </div>
|
|
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  pq.decode (list_codes, decoded_vec);</div>
|
|
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  list_codes += pq.code_size;</div>
|
|
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span> </div>
|
|
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="keywordtype">float</span> dis;</div>
|
|
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT) {</div>
|
|
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  dis = -dis0 - fvec_inner_product (decoded_vec, qi, d);</div>
|
|
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  dis = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (decoded_vec, dvec, d);</div>
|
|
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  }</div>
|
|
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span> </div>
|
|
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="keywordflow">if</span> (dis < heap_sim[0]) {</div>
|
|
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  maxheap_pop (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = store_pairs ? (key << 32 | j) : list_ids[j];</div>
|
|
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  maxheap_push (k, heap_sim, heap_ids, dis, <span class="keywordtype">id</span>);</div>
|
|
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  }</div>
|
|
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  }</div>
|
|
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  }</div>
|
|
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span> </div>
|
|
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="comment">/*****************************************************</span></div>
|
|
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="comment"> * Scanning codes with polysemous filtering</span></div>
|
|
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span> <span class="comment"> *****************************************************/</span></div>
|
|
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span> </div>
|
|
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="comment">// code for the query</span></div>
|
|
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  <span class="keywordtype">size_t</span> n_hamming_pass;</div>
|
|
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span> </div>
|
|
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span> </div>
|
|
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="keyword">template</span> <<span class="keyword">class</span> HammingComputer></div>
|
|
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keywordtype">void</span> scan_list_polysemous_hc (</div>
|
|
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <span class="keywordtype">size_t</span> k, <span class="keywordtype">float</span> * heap_sim, <span class="keywordtype">long</span> * heap_ids, <span class="keywordtype">bool</span> store_pairs)</div>
|
|
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  {</div>
|
|
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keywordtype">float</span> dis0 = precompute_list_tables ();</div>
|
|
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keywordtype">int</span> ht = ivfpq.polysemous_ht;</div>
|
|
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span> </div>
|
|
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keywordtype">int</span> code_size = pq.code_size;</div>
|
|
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span> </div>
|
|
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  HammingComputer hc (q_code.data(), code_size);</div>
|
|
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span> </div>
|
|
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < list_size; j++) {</div>
|
|
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keyword">const</span> uint8_t *b_code = list_codes;</div>
|
|
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  <span class="keywordtype">int</span> hd = hc.hamming (b_code);</div>
|
|
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  <span class="keywordflow">if</span> (hd < ht) {</div>
|
|
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  n_hamming_pass ++;</div>
|
|
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span> </div>
|
|
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  <span class="keywordtype">float</span> dis = dis0;</div>
|
|
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table;</div>
|
|
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span> </div>
|
|
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m < pq.M; m++) {</div>
|
|
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  dis += tab[*b_code++];</div>
|
|
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  tab += pq.ksub;</div>
|
|
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  }</div>
|
|
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span> </div>
|
|
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <span class="keywordflow">if</span> (dis < heap_sim[0]) {</div>
|
|
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  maxheap_pop (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = store_pairs ? (key << 32 | j) : list_ids[j];</div>
|
|
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  maxheap_push (k, heap_sim, heap_ids, dis, <span class="keywordtype">id</span>);</div>
|
|
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  }</div>
|
|
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  }</div>
|
|
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  list_codes += code_size;</div>
|
|
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  }</div>
|
|
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  }</div>
|
|
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> </div>
|
|
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  <span class="keywordtype">void</span> scan_list_polysemous (</div>
|
|
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  <span class="keywordtype">size_t</span> k, <span class="keywordtype">float</span> * heap_sim, <span class="keywordtype">long</span> * heap_ids, <span class="keywordtype">bool</span> store_pairs)</div>
|
|
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  {</div>
|
|
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="keywordflow">switch</span> (pq.code_size) {</div>
|
|
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span> <span class="preprocessor">#define HANDLE_CODE_SIZE(cs) \</span></div>
|
|
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> <span class="preprocessor"> case cs: \</span></div>
|
|
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span> <span class="preprocessor"> scan_list_polysemous_hc <HammingComputer ## cs> \</span></div>
|
|
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span> <span class="preprocessor"> (k, heap_sim, heap_ids, store_pairs); \</span></div>
|
|
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span> <span class="preprocessor"> break</span></div>
|
|
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span> <span class="preprocessor"></span> HANDLE_CODE_SIZE(4);</div>
|
|
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  HANDLE_CODE_SIZE(8);</div>
|
|
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  HANDLE_CODE_SIZE(16);</div>
|
|
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  HANDLE_CODE_SIZE(20);</div>
|
|
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  HANDLE_CODE_SIZE(32);</div>
|
|
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  HANDLE_CODE_SIZE(64);</div>
|
|
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span> <span class="preprocessor">#undef HANDLE_CODE_SIZE</span></div>
|
|
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span> <span class="preprocessor"></span> <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  <span class="keywordflow">if</span> (pq.code_size % 8 == 0)</div>
|
|
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  scan_list_polysemous_hc <HammingComputerM8></div>
|
|
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  scan_list_polysemous_hc <HammingComputerM4></div>
|
|
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  }</div>
|
|
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  }</div>
|
|
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> </div>
|
|
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span> };</div>
|
|
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span> </div>
|
|
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> </div>
|
|
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span> </div>
|
|
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span> </div>
|
|
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span> } <span class="comment">// anonymous namespace</span></div>
|
|
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span> </div>
|
|
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span> </div>
|
|
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span> IndexIVFPQStats indexIVFPQ_stats;</div>
|
|
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span> </div>
|
|
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span> <span class="keywordtype">void</span> IndexIVFPQStats::reset () {</div>
|
|
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  memset (<span class="keyword">this</span>, 0, <span class="keyword">sizeof</span> (*<span class="keyword">this</span>));</div>
|
|
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span> }</div>
|
|
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> </div>
|
|
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span> </div>
|
|
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span> </div>
|
|
<div class="line"><a name="l00931"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a150a37cf3e8a7e37cb8dab1d5678bc02"> 931</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a150a37cf3e8a7e37cb8dab1d5678bc02">IndexIVFPQ::search_preassigned</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> nx, <span class="keyword">const</span> <span class="keywordtype">float</span> *qx, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
|
|
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *keys,</div>
|
|
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *coarse_dis,</div>
|
|
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels,</div>
|
|
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  <span class="keywordtype">bool</span> store_pairs)<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> res = {</div>
|
|
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  size_t(nx), size_t(k),</div>
|
|
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  labels, distances</div>
|
|
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  };</div>
|
|
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span> </div>
|
|
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span> <span class="preprocessor">#pragma omp parallel</span></div>
|
|
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span> <span class="preprocessor"></span> {</div>
|
|
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  InvertedListScanner<long> qt (*<span class="keyword">this</span>);</div>
|
|
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <span class="keywordtype">size_t</span> stats_nlist = 0;</div>
|
|
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  <span class="keywordtype">size_t</span> stats_ncode = 0;</div>
|
|
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  uint64_t init_query_cycles = 0;</div>
|
|
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  uint64_t scan_cycles = 0;</div>
|
|
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  uint64_t heap_cycles = 0;</div>
|
|
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span> </div>
|
|
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span> <span class="preprocessor">#pragma omp for</span></div>
|
|
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < nx; i++) {</div>
|
|
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *qi = qx + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
|
|
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> * keysi = keys + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
|
|
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *coarse_dis_i = coarse_dis + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
|
|
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  <span class="keywordtype">float</span> * heap_sim = res.<a class="code" href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">get_val</a> (i);</div>
|
|
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  <span class="keywordtype">long</span> * heap_ids = res.<a class="code" href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">get_ids</a> (i);</div>
|
|
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span> </div>
|
|
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  uint64_t t0;</div>
|
|
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  TIC;</div>
|
|
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  maxheap_heapify (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  heap_cycles += TOC;</div>
|
|
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span> </div>
|
|
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  TIC;</div>
|
|
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  qt.init_query (qi);</div>
|
|
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  init_query_cycles += TOC;</div>
|
|
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span> </div>
|
|
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  <span class="keywordtype">size_t</span> nscan = 0;</div>
|
|
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span> </div>
|
|
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> ik = 0; ik < <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>; ik++) {</div>
|
|
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="keywordtype">long</span> key = keysi[ik]; <span class="comment">/* select the list */</span></div>
|
|
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  <span class="keywordflow">if</span> (key < 0) {</div>
|
|
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  <span class="comment">// not enough centroids for multiprobe</span></div>
|
|
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  }</div>
|
|
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  FAISS_THROW_IF_NOT_FMT (</div>
|
|
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  key < (<span class="keywordtype">long</span>) <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>,</div>
|
|
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  <span class="stringliteral">"Invalid key=%ld at ik=%ld nlist=%ld\n"</span>,</div>
|
|
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  key, ik, nlist);</div>
|
|
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span> </div>
|
|
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].size();</div>
|
|
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  stats_nlist ++;</div>
|
|
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  nscan += list_size;</div>
|
|
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span> </div>
|
|
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="keywordflow">if</span> (list_size == 0) <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span> </div>
|
|
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  qt.init_list (key, coarse_dis_i[ik],</div>
|
|
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  list_size, <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].data(),</div>
|
|
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  codes[key].data());</div>
|
|
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span> </div>
|
|
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  TIC;</div>
|
|
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a> > 0) {</div>
|
|
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  qt.scan_list_polysemous</div>
|
|
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (list_size > <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a>) {</div>
|
|
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  qt.scan_list_with_table (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  qt.scan_on_the_fly_dist (k, heap_sim, heap_ids, store_pairs);</div>
|
|
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  }</div>
|
|
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  scan_cycles += TOC;</div>
|
|
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> </div>
|
|
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a> && nscan >= <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a>) <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  }</div>
|
|
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  stats_ncode += nscan;</div>
|
|
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  TIC;</div>
|
|
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  maxheap_reorder (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span> </div>
|
|
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
|
|
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < k; j++)</div>
|
|
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  heap_sim[j] = -heap_sim[j];</div>
|
|
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  }</div>
|
|
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  heap_cycles += TOC;</div>
|
|
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  }</div>
|
|
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span> </div>
|
|
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span> <span class="preprocessor">#pragma omp critical</span></div>
|
|
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span> <span class="preprocessor"></span> {</div>
|
|
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  indexIVFPQ_stats.n_hamming_pass += qt.n_hamming_pass;</div>
|
|
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  indexIVFPQ_stats.nlist += stats_nlist;</div>
|
|
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  indexIVFPQ_stats.ncode += stats_ncode;</div>
|
|
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span> </div>
|
|
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  indexIVFPQ_stats.init_query_cycles += init_query_cycles;</div>
|
|
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  indexIVFPQ_stats.init_list_cycles += qt.init_list_cycles;</div>
|
|
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  indexIVFPQ_stats.scan_cycles += scan_cycles - qt.init_list_cycles;</div>
|
|
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  indexIVFPQ_stats.heap_cycles += heap_cycles;</div>
|
|
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  }</div>
|
|
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span> </div>
|
|
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  }</div>
|
|
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  indexIVFPQ_stats.nq += nx;</div>
|
|
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span> }</div>
|
|
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> </div>
|
|
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span> </div>
|
|
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span> </div>
|
|
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span> </div>
|
|
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span> IndexIVFPQ::IndexIVFPQ ()</div>
|
|
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span> {</div>
|
|
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  <span class="comment">// initialize some runtime values</span></div>
|
|
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 0;</div>
|
|
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a> = 0;</div>
|
|
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a> = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a> = 0;</div>
|
|
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a> = 0;</div>
|
|
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a> = <span class="keyword">nullptr</span>;</div>
|
|
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span> }</div>
|
|
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span> </div>
|
|
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span> </div>
|
|
<div class="line"><a name="l01046"></a><span class="lineno"><a class="line" href="structfaiss_1_1CodeCmp.html"> 1046</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1CodeCmp.html">CodeCmp</a> {</div>
|
|
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  <span class="keyword">const</span> uint8_t *tab;</div>
|
|
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  <span class="keywordtype">size_t</span> code_size;</div>
|
|
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  <span class="keywordtype">bool</span> operator () (<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b)<span class="keyword"> const </span>{</div>
|
|
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>  <span class="keywordflow">return</span> cmp (a, b) > 0;</div>
|
|
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  }</div>
|
|
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  <span class="keywordtype">int</span> cmp (<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b)<span class="keyword"> const </span>{</div>
|
|
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  <span class="keywordflow">return</span> memcmp (tab + a * code_size, tab + b * code_size,</div>
|
|
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  code_size);</div>
|
|
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  }</div>
|
|
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span> };</div>
|
|
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> </div>
|
|
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span> </div>
|
|
<div class="line"><a name="l01059"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c"> 1059</a></span> <span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c">IndexIVFPQ::find_duplicates</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *dup_ids, <span class="keywordtype">size_t</span> *lims)<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  <span class="keywordtype">size_t</span> ngroup = 0;</div>
|
|
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  lims[0] = 0;</div>
|
|
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> list_no = 0; list_no < <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; list_no++) {</div>
|
|
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <span class="keywordtype">size_t</span> n = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no].size();</div>
|
|
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  std::vector<int> ord (n);</div>
|
|
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) ord[i] = i;</div>
|
|
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  <a class="code" href="structfaiss_1_1CodeCmp.html">CodeCmp</a> cs = { codes[list_no].data(), code_size };</div>
|
|
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  std::sort (ord.begin(), ord.end(), cs);</div>
|
|
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span> </div>
|
|
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *list_ids = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no].data();</div>
|
|
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <span class="keywordtype">int</span> prev = -1; <span class="comment">// all elements from prev to i-1 are equal</span></div>
|
|
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
|
|
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <span class="keywordflow">if</span> (prev >= 0 && cs.cmp (ord [prev], ord [i]) == 0) {</div>
|
|
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  <span class="comment">// same as previous => remember</span></div>
|
|
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  <span class="keywordflow">if</span> (prev + 1 == i) { <span class="comment">// start new group</span></div>
|
|
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  ngroup++;</div>
|
|
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  lims[ngroup] = lims[ngroup - 1];</div>
|
|
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  dup_ids [lims [ngroup]++] = list_ids [ord [prev]];</div>
|
|
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  }</div>
|
|
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  dup_ids [lims [ngroup]++] = list_ids [ord [i]];</div>
|
|
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  } <span class="keywordflow">else</span> { <span class="comment">// not same as previous.</span></div>
|
|
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  prev = i;</div>
|
|
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  }</div>
|
|
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  }</div>
|
|
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  }</div>
|
|
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  <span class="keywordflow">return</span> ngroup;</div>
|
|
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span> }</div>
|
|
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span> </div>
|
|
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> </div>
|
|
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> </div>
|
|
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span> </div>
|
|
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span> <span class="comment">/*****************************************</span></div>
|
|
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span> <span class="comment"> * IndexIVFPQR implementation</span></div>
|
|
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span> <span class="comment"> ******************************************/</span></div>
|
|
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span> </div>
|
|
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span> IndexIVFPQR::IndexIVFPQR (</div>
|
|
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  <a class="code" href="structfaiss_1_1Index.html">Index</a> * quantizer, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist,</div>
|
|
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  <span class="keywordtype">size_t</span> M, <span class="keywordtype">size_t</span> nbits_per_idx,</div>
|
|
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  <span class="keywordtype">size_t</span> M_refine, <span class="keywordtype">size_t</span> nbits_per_idx_refine):</div>
|
|
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html">IndexIVFPQ</a> (quantizer, d, nlist, M, nbits_per_idx),</div>
|
|
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>  refine_pq (d, M_refine, nbits_per_idx_refine),</div>
|
|
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  k_factor (4)</div>
|
|
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span> {</div>
|
|
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a> = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> }</div>
|
|
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span> </div>
|
|
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span> IndexIVFPQR::IndexIVFPQR ():</div>
|
|
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  k_factor (1)</div>
|
|
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span> {</div>
|
|
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a> = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span> }</div>
|
|
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span> </div>
|
|
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span> </div>
|
|
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span> </div>
|
|
<div class="line"><a name="l01115"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075"> 1115</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075">IndexIVFPQR::reset</a>()</div>
|
|
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span> {</div>
|
|
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">IndexIVFPQ::reset</a>();</div>
|
|
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.clear();</div>
|
|
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> }</div>
|
|
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span> </div>
|
|
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> </div>
|
|
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span> </div>
|
|
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span> </div>
|
|
<div class="line"><a name="l01124"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8"> 1124</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8">IndexIVFPQR::train_residual</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
|
|
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span> {</div>
|
|
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span> </div>
|
|
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  <span class="keywordtype">float</span> * residual_2 = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter <float></a> del(residual_2);</div>
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<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span> </div>
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<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">train_residual_o</a> (n, x, residual_2);</div>
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<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span> </div>
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<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
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<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  printf (<span class="stringliteral">"training %zdx%zd 2nd level PQ quantizer on %ld %dD-vectors\n"</span>,</div>
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<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>, <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, n, d);</div>
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<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span> </div>
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<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">max_points_per_centroid</a> = 1000;</div>
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<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.verbose = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
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<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> </div>
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<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.train (n, residual_2);</div>
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<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span> </div>
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<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> }</div>
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<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span> </div>
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<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> </div>
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<div class="line"><a name="l01144"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5"> 1144</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5">IndexIVFPQR::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids) {</div>
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<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">add_core</a> (n, x, xids, <span class="keyword">nullptr</span>);</div>
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<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span> }</div>
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<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span> </div>
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<div class="line"><a name="l01148"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec"> 1148</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">IndexIVFPQR::add_core</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
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<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx) {</div>
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<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> </div>
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<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>  <span class="keywordtype">float</span> * residual_2 = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter <float></a> del(residual_2);</div>
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<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> </div>
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<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n0 = <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
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<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> </div>
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<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (n, x, xids, residual_2, precomputed_idx);</div>
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<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span> </div>
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<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.resize (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>);</div>
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|
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span> </div>
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|
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (</div>
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<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  residual_2, &<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>[n0 * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>], n);</div>
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|
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span> </div>
|
|
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span> </div>
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|
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span> }</div>
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|
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span> </div>
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|
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span> </div>
|
|
<div class="line"><a name="l01167"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a3e982ee6f1a3a025148270701867d04f"> 1167</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a3e982ee6f1a3a025148270701867d04f">IndexIVFPQR::search</a> (</div>
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|
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
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|
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>  <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
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|
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> <span class="keyword"></span>{</div>
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|
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>  FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
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|
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  <span class="keywordtype">long</span> * idx = <span class="keyword">new</span> <span class="keywordtype">long</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
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|
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<long></a> del (idx);</div>
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|
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  <span class="keywordtype">float</span> * L1_dis = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
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|
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del2 (L1_dis);</div>
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|
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  uint64_t t0;</div>
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|
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  TIC;</div>
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|
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a> (n, x, <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>, L1_dis, idx);</div>
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|
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>  indexIVFPQ_stats.assign_cycles += TOC;</div>
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|
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span> </div>
|
|
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>  TIC;</div>
|
|
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>  <span class="keywordtype">size_t</span> k_coarse = long(k * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a0b02a4151ceacc070352f8b15cc0ee0b">k_factor</a>);</div>
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|
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *coarse_labels = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> [k_coarse * n];</div>
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|
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<idx_t></a> del3 (coarse_labels);</div>
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|
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  { <span class="comment">// query with quantizer levels 1 and 2.</span></div>
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|
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  <span class="keywordtype">float</span> *coarse_distances = <span class="keyword">new</span> <span class="keywordtype">float</span> [k_coarse * n];</div>
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|
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del(coarse_distances);</div>
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|
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span> </div>
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|
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a150a37cf3e8a7e37cb8dab1d5678bc02">search_preassigned</a> (n, x, k_coarse,</div>
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|
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  idx, L1_dis, coarse_distances, coarse_labels,</div>
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|
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  <span class="keyword">true</span>);</div>
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|
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>  }</div>
|
|
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span> </div>
|
|
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span> </div>
|
|
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>  indexIVFPQ_stats.search_cycles += TOC;</div>
|
|
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span> </div>
|
|
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  TIC;</div>
|
|
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span> </div>
|
|
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  <span class="comment">// 3rd level refinement</span></div>
|
|
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  <span class="keywordtype">size_t</span> n_refine = 0;</div>
|
|
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span> <span class="preprocessor">#pragma omp parallel reduction(+ : n_refine)</span></div>
|
|
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span> <span class="preprocessor"></span> {</div>
|
|
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span>  <span class="comment">// tmp buffers</span></div>
|
|
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>  <span class="keywordtype">float</span> *residual_1 = <span class="keyword">new</span> <span class="keywordtype">float</span> [2 * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
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|
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del (residual_1);</div>
|
|
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>  <span class="keywordtype">float</span> *residual_2 = residual_1 + <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
|
|
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> <span class="preprocessor">#pragma omp for</span></div>
|
|
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = 0; i < n; i++) {</div>
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|
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *xq = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
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|
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> * shortlist = coarse_labels + k_coarse * i;</div>
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|
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>  <span class="keywordtype">float</span> * heap_sim = distances + k * i;</div>
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|
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span>  <span class="keywordtype">long</span> * heap_ids = labels + k * i;</div>
|
|
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>  maxheap_heapify (k, heap_sim, heap_ids);</div>
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|
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span> </div>
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|
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < k_coarse; j++) {</div>
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|
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>  <span class="keywordtype">long</span> sl = shortlist[j];</div>
|
|
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> </div>
|
|
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>  <span class="keywordflow">if</span> (sl == -1) <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span> </div>
|
|
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  <span class="keywordtype">int</span> list_no = sl >> 32;</div>
|
|
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>  <span class="keywordtype">int</span> ofs = sl & 0xffffffff;</div>
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|
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> </div>
|
|
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  assert (list_no >= 0 && list_no < <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
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|
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  assert (ofs >= 0 && ofs < <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no].size());</div>
|
|
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span> </div>
|
|
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span>  <span class="comment">// 1st level residual</span></div>
|
|
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (xq, residual_1, list_no);</div>
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|
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span> </div>
|
|
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  <span class="comment">// 2nd level residual</span></div>
|
|
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  <span class="keyword">const</span> uint8_t * l2code = &codes[list_no][ofs * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>];</div>
|
|
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (l2code, residual_2);</div>
|
|
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> l = 0; l < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; l++)</div>
|
|
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>  residual_2[l] = residual_1[l] - residual_2[l];</div>
|
|
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span> </div>
|
|
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  <span class="comment">// 3rd level residual's approximation</span></div>
|
|
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="keywordtype">id</span> = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no][ofs];</div>
|
|
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  assert (0 <= <span class="keywordtype">id</span> && <span class="keywordtype">id</span> < <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
|
|
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (&<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a> [<span class="keywordtype">id</span> * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>],</div>
|
|
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>  residual_1);</div>
|
|
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span> </div>
|
|
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>  <span class="keywordtype">float</span> dis = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (residual_1, residual_2, d);</div>
|
|
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span> </div>
|
|
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>  <span class="keywordflow">if</span> (dis < heap_sim[0]) {</div>
|
|
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>  maxheap_pop (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>  maxheap_push (k, heap_sim, heap_ids, dis, <span class="keywordtype">id</span>);</div>
|
|
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  }</div>
|
|
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  n_refine ++;</div>
|
|
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  }</div>
|
|
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  maxheap_reorder (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  }</div>
|
|
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>  }</div>
|
|
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  indexIVFPQ_stats.nrefine += n_refine;</div>
|
|
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>  indexIVFPQ_stats.refine_cycles += TOC;</div>
|
|
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span> }</div>
|
|
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span> </div>
|
|
<div class="line"><a name="l01256"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a0f0d8fc6b2c6aa2431c1730111a3b22a"> 1256</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a0f0d8fc6b2c6aa2431c1730111a3b22a">IndexIVFPQR::reconstruct_n</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i0, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> ni, <span class="keywordtype">float</span> *recons)<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  std::vector<float> r3 (d);</div>
|
|
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span> </div>
|
|
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1df10e9e5f4ff0dabf283f19ad94bbd4">IndexIVFPQ::reconstruct_n</a> (i0, ni, recons);</div>
|
|
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span> </div>
|
|
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = i0; i < i0 + ni; i++) {</div>
|
|
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>  <span class="keywordtype">float</span> *r = recons + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
|
|
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (&<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a> [i * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>], r3.data());</div>
|
|
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> </div>
|
|
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++)</div>
|
|
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  r[j] += r3[j];</div>
|
|
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span> </div>
|
|
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>  }</div>
|
|
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span> </div>
|
|
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span> }</div>
|
|
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span> </div>
|
|
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span> </div>
|
|
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span> </div>
|
|
<div class="line"><a name="l01275"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9"> 1275</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9">IndexIVFPQR::merge_from</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &other_in, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> add_id)</div>
|
|
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span> {</div>
|
|
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html">IndexIVFPQR</a> *other = <span class="keyword">dynamic_cast<</span><a class="code" href="structfaiss_1_1IndexIVFPQR.html">IndexIVFPQR</a> *<span class="keyword">></span> (&other_in);</div>
|
|
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  FAISS_THROW_IF_NOT(other);</div>
|
|
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span> </div>
|
|
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">IndexIVF::merge_from</a> (other_in, add_id);</div>
|
|
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span> </div>
|
|
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.insert (<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.end(),</div>
|
|
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  other-><a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.begin(),</div>
|
|
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  other-><a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.end());</div>
|
|
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  other-><a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.clear();</div>
|
|
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span> }</div>
|
|
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span> </div>
|
|
<div class="line"><a name="l01288"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c"> 1288</a></span> <span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c">IndexIVFPQR::remove_ids</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a>& <span class="comment">/*sel*/</span>) {</div>
|
|
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  FAISS_THROW_MSG(<span class="stringliteral">"not implemented"</span>);</div>
|
|
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  <span class="keywordflow">return</span> 0;</div>
|
|
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span> }</div>
|
|
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span> </div>
|
|
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span> <span class="comment">/*****************************************</span></div>
|
|
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span> <span class="comment"> * IndexIVFPQCompact implementation</span></div>
|
|
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span> <span class="comment"> ******************************************/</span></div>
|
|
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span> </div>
|
|
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span> IndexIVFPQCompact::IndexIVFPQCompact ()</div>
|
|
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span> {</div>
|
|
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  alloc_type = <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70a3d58d7b26146791f0fe34b35a9b0fd95">Alloc_type_none</a>;</div>
|
|
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a> = <span class="keyword">nullptr</span>;</div>
|
|
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">compact_ids</a> = <span class="keyword">nullptr</span>;</div>
|
|
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">compact_codes</a> = <span class="keyword">nullptr</span>;</div>
|
|
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span> }</div>
|
|
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span> </div>
|
|
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span> </div>
|
|
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span> IndexIVFPQCompact::IndexIVFPQCompact (<span class="keyword">const</span> IndexIVFPQ &other)</div>
|
|
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span> {</div>
|
|
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  FAISS_THROW_IF_NOT_MSG (other.ntotal < (1UL << 31),</div>
|
|
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  <span class="stringliteral">"IndexIVFPQCompact cannot store more than 2G images"</span>);</div>
|
|
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span> </div>
|
|
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  <span class="comment">// here it would be more convenient to just use the</span></div>
|
|
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>  <span class="comment">// copy-constructor, but it would copy the lists as well: too much</span></div>
|
|
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  <span class="comment">// overhead...</span></div>
|
|
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span> </div>
|
|
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="comment">// copy fields from Index</span></div>
|
|
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  d = other.d;</div>
|
|
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = other.ntotal;</div>
|
|
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>  <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a> = other.verbose;</div>
|
|
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = other.is_trained;</div>
|
|
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  <a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> = other.metric_type;</div>
|
|
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span> </div>
|
|
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>  <span class="comment">// copy fields from IndexIVF (except ids)</span></div>
|
|
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a> = other.nlist;</div>
|
|
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a> = other.nprobe;</div>
|
|
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a> = other.quantizer;</div>
|
|
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#a23ee7f75f8be4472a17778f2b33875de">quantizer_trains_alone</a> = other.quantizer_trains_alone;</div>
|
|
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  <a class="code" href="structfaiss_1_1IndexIVF.html#aed2e9757ad5f3c234fd8ad60175a2a73">own_fields</a> = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  direct_map = other.direct_map;</div>
|
|
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span> </div>
|
|
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  <span class="comment">// copy fields from IndexIVFPQ (except codes)</span></div>
|
|
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a> = other.by_residual;</div>
|
|
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = other.use_precomputed_table;</div>
|
|
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a> = other.precomputed_table;</div>
|
|
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  code_size = other.code_size;</div>
|
|
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a> = other.pq;</div>
|
|
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a> = other.do_polysemous_training;</div>
|
|
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a> = <span class="keyword">nullptr</span>;</div>
|
|
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span> </div>
|
|
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a> = other.scan_table_threshold;</div>
|
|
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a> = other.max_codes;</div>
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|
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a> = other.polysemous_ht;</div>
|
|
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span> </div>
|
|
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  <span class="comment">//allocate</span></div>
|
|
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  alloc_type = <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70acf2d6ba8878a2778383adc32593ba8e6">Alloc_type_new</a>;</div>
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|
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a> = <span class="keyword">new</span> uint32_t [<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a> + 1];</div>
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|
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">compact_ids</a> = <span class="keyword">new</span> uint32_t [<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>];</div>
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|
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">compact_codes</a> = <span class="keyword">new</span> uint8_t [<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>];</div>
|
|
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span> </div>
|
|
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span> </div>
|
|
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  <span class="comment">// copy content from other</span></div>
|
|
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  <span class="keywordtype">size_t</span> ofs = 0;</div>
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|
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
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|
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a> [i] = ofs;</div>
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|
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>  <span class="keyword">const</span> std::vector<long> &other_ids = other.ids[i];</div>
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|
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < other_ids.size(); j++) {</div>
|
|
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  <span class="keywordtype">long</span> <span class="keywordtype">id</span> = other_ids[j];</div>
|
|
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  FAISS_THROW_IF_NOT_MSG (<span class="keywordtype">id</span> < (1UL << 31),</div>
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|
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  <span class="stringliteral">"IndexIVFPQCompact cannot store ids > 2G"</span>);</div>
|
|
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">compact_ids</a>[ofs + j] = id;</div>
|
|
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>  }</div>
|
|
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  memcpy (<a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">compact_codes</a> + ofs * code_size,</div>
|
|
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  other.codes[i].data(),</div>
|
|
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  other.codes[i].size());</div>
|
|
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  ofs += other_ids.size();</div>
|
|
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  }</div>
|
|
<div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  FAISS_THROW_IF_NOT (ofs == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
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|
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a> [<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>] = ofs;</div>
|
|
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span> </div>
|
|
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span> }</div>
|
|
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span> </div>
|
|
<div class="line"><a name="l01371"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQCompact.html#ade7b46bbbcaf244ad680104380afb1b8"> 1371</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ade7b46bbbcaf244ad680104380afb1b8">IndexIVFPQCompact::add</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a>, <span class="keyword">const</span> <span class="keywordtype">float</span> *) {</div>
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|
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  FAISS_THROW_MSG (<span class="stringliteral">"cannot add to an IndexIVFPQCompact"</span>);</div>
|
|
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span> }</div>
|
|
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span> </div>
|
|
<div class="line"><a name="l01375"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQCompact.html#a8f5eccfb4d5e4098ff6c00acb3bc40a1"> 1375</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a8f5eccfb4d5e4098ff6c00acb3bc40a1">IndexIVFPQCompact::reset</a> () {</div>
|
|
<div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  FAISS_THROW_MSG (<span class="stringliteral">"cannot reset an IndexIVFPQCompact"</span>);</div>
|
|
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span> }</div>
|
|
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span> </div>
|
|
<div class="line"><a name="l01379"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQCompact.html#a0ef8132fae22a50616fe1201c8b20588"> 1379</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a0ef8132fae22a50616fe1201c8b20588">IndexIVFPQCompact::train</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a>, <span class="keyword">const</span> <span class="keywordtype">float</span> *) {</div>
|
|
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>  FAISS_THROW_MSG (<span class="stringliteral">"cannot train an IndexIVFPQCompact"</span>);</div>
|
|
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span> }</div>
|
|
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span> </div>
|
|
<div class="line"><a name="l01383"></a><span class="lineno"> 1383</span> </div>
|
|
<div class="line"><a name="l01384"></a><span class="lineno"> 1384</span> </div>
|
|
<div class="line"><a name="l01385"></a><span class="lineno"> 1385</span> </div>
|
|
<div class="line"><a name="l01386"></a><span class="lineno"> 1386</span> IndexIVFPQCompact::~IndexIVFPQCompact ()</div>
|
|
<div class="line"><a name="l01387"></a><span class="lineno"> 1387</span> {</div>
|
|
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  <span class="keywordflow">if</span> (alloc_type == <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70acf2d6ba8878a2778383adc32593ba8e6">Alloc_type_new</a>) {</div>
|
|
<div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>  <span class="keyword">delete</span> [] <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a>;</div>
|
|
<div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>  <span class="keyword">delete</span> [] <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">compact_codes</a>;</div>
|
|
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  <span class="keyword">delete</span> [] <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">compact_ids</a>;</div>
|
|
<div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (alloc_type == <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70a38c1b1ed9ebdbd4b0047be13080094bb">Alloc_type_mmap</a>) {</div>
|
|
<div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  munmap (mmap_buffer, mmap_length);</div>
|
|
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span> </div>
|
|
<div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  }</div>
|
|
<div class="line"><a name="l01396"></a><span class="lineno"> 1396</span> </div>
|
|
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span> }</div>
|
|
<div class="line"><a name="l01398"></a><span class="lineno"> 1398</span> </div>
|
|
<div class="line"><a name="l01399"></a><span class="lineno"> 1399</span> </div>
|
|
<div class="line"><a name="l01400"></a><span class="lineno"> 1400</span> </div>
|
|
<div class="line"><a name="l01401"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQCompact.html#ada9e5292194ee1be42d122037fbf2502"> 1401</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#ada9e5292194ee1be42d122037fbf2502">IndexIVFPQCompact::search_preassigned</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> nx, <span class="keyword">const</span> <span class="keywordtype">float</span> *qx, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
|
|
<div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *keys,</div>
|
|
<div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *coarse_dis,</div>
|
|
<div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>  <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels,</div>
|
|
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  <span class="keywordtype">bool</span> store_pairs)<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> res = {</div>
|
|
<div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  size_t(nx), size_t(k),</div>
|
|
<div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>  labels, distances</div>
|
|
<div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  };</div>
|
|
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span> </div>
|
|
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span> <span class="preprocessor">#pragma omp parallel</span></div>
|
|
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span> <span class="preprocessor"></span> {</div>
|
|
<div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  InvertedListScanner<uint32_t> qt (*<span class="keyword">this</span>);</div>
|
|
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>  <span class="keywordtype">size_t</span> stats_nlist = 0;</div>
|
|
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  <span class="keywordtype">size_t</span> stats_ncode = 0;</div>
|
|
<div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  uint64_t init_query_cycles = 0;</div>
|
|
<div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  uint64_t scan_cycles = 0;</div>
|
|
<div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>  uint64_t heap_cycles = 0;</div>
|
|
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span> </div>
|
|
<div class="line"><a name="l01421"></a><span class="lineno"> 1421</span> <span class="preprocessor">#pragma omp for</span></div>
|
|
<div class="line"><a name="l01422"></a><span class="lineno"> 1422</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < nx; i++) {</div>
|
|
<div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *qi = qx + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
|
|
<div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> * keysi = keys + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
|
|
<div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *coarse_dis_i = coarse_dis + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
|
|
<div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  <span class="keywordtype">float</span> * heap_sim = res.<a class="code" href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">get_val</a> (i);</div>
|
|
<div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  <span class="keywordtype">long</span> * heap_ids = res.<a class="code" href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">get_ids</a> (i);</div>
|
|
<div class="line"><a name="l01428"></a><span class="lineno"> 1428</span> </div>
|
|
<div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>  uint64_t t0;</div>
|
|
<div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  TIC;</div>
|
|
<div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  maxheap_heapify (k, heap_sim, heap_ids);</div>
|
|
<div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  heap_cycles += TOC;</div>
|
|
<div class="line"><a name="l01433"></a><span class="lineno"> 1433</span> </div>
|
|
<div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>  TIC;</div>
|
|
<div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>  qt.init_query (qi);</div>
|
|
<div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  init_query_cycles += TOC;</div>
|
|
<div class="line"><a name="l01437"></a><span class="lineno"> 1437</span> </div>
|
|
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span>  <span class="keywordtype">size_t</span> nscan = 0;</div>
|
|
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span> </div>
|
|
<div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> ik = 0; ik < <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>; ik++) {</div>
|
|
<div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>  <span class="keywordtype">long</span> key = keysi[ik]; <span class="comment">/* select the list */</span></div>
|
|
<div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>  <span class="keywordflow">if</span> (key < 0) {</div>
|
|
<div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>  <span class="comment">// not enough centroids for multiprobe</span></div>
|
|
<div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>  <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>  }</div>
|
|
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  <span class="keywordflow">if</span> (key >= (<span class="keywordtype">long</span>) nlist) {</div>
|
|
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>  fprintf (stderr, <span class="stringliteral">"Invalid key=%ld nlist=%ld\n"</span>, key, nlist);</div>
|
|
<div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="keywordflow">throw</span>;</div>
|
|
<div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  }</div>
|
|
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a>[key + 1] - <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">limits</a>[key];</div>
|
|
<div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>  stats_nlist ++;</div>
|
|
<div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>  nscan += list_size;</div>
|
|
<div class="line"><a name="l01453"></a><span class="lineno"> 1453</span> </div>
|
|
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  <span class="keywordflow">if</span> (list_size == 0) <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l01455"></a><span class="lineno"> 1455</span> </div>
|
|
<div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>  qt.init_list (key, coarse_dis_i[ik],</div>
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<div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>  list_size, <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">compact_ids</a> + limits[key],</div>
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<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  <a class="code" href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">compact_codes</a> + limits[key] * code_size);</div>
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<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span> </div>
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<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  TIC;</div>
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<div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a> > 0) {</div>
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<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span>  qt.scan_list_polysemous</div>
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<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  (k, heap_sim, heap_ids, store_pairs);</div>
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<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (list_size > <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a>) {</div>
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<div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  qt.scan_list_with_table (k, heap_sim, heap_ids, store_pairs);</div>
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<div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  qt.scan_on_the_fly_dist (k, heap_sim, heap_ids, store_pairs);</div>
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<div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>  }</div>
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<div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>  scan_cycles += TOC;</div>
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<div class="line"><a name="l01470"></a><span class="lineno"> 1470</span> </div>
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<div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a> && nscan >= <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">max_codes</a>) <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  }</div>
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<div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>  stats_ncode += nscan;</div>
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<div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>  TIC;</div>
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<div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>  maxheap_reorder (k, heap_sim, heap_ids);</div>
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<div class="line"><a name="l01476"></a><span class="lineno"> 1476</span> </div>
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<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
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<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < k; j++) {</div>
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<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  heap_sim[i] = -heap_sim[i];</div>
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<div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>  }</div>
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<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>  }</div>
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<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>  heap_cycles += TOC;</div>
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<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  }</div>
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<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span> </div>
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<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span> <span class="preprocessor">#pragma omp critical</span></div>
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<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span> <span class="preprocessor"></span> {</div>
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<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  indexIVFPQ_stats.n_hamming_pass += qt.n_hamming_pass;</div>
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<div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  indexIVFPQ_stats.nlist += stats_nlist;</div>
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<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>  indexIVFPQ_stats.ncode += stats_ncode;</div>
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<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span> </div>
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<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  indexIVFPQ_stats.init_query_cycles += init_query_cycles;</div>
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<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  indexIVFPQ_stats.init_list_cycles += qt.init_list_cycles;</div>
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<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>  indexIVFPQ_stats.scan_cycles += scan_cycles - qt.init_list_cycles;</div>
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<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  indexIVFPQ_stats.heap_cycles += heap_cycles;</div>
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<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>  }</div>
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<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span> </div>
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<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>  }</div>
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<div class="line"><a name="l01498"></a><span class="lineno"> 1498</span>  indexIVFPQ_stats.nq += nx;</div>
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<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span> }</div>
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<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span> </div>
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<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span> </div>
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<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span> </div>
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<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span> } <span class="comment">// namespace faiss</span></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_a1fa62ed464c15768479c92646ed484c7"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#a1fa62ed464c15768479c92646ed484c7">faiss::IndexIVFPQCompact::compact_ids</a></div><div class="ttdeci">uint32_t * compact_ids</div><div class="ttdoc">size ntotal </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00218">IndexIVFPQ.h:218</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00045">IndexIVF.h:45</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_aaaf53cae0e47baf3fb1199ce4d789694"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#aaaf53cae0e47baf3fb1199ce4d789694">faiss::IndexIVFPQCompact::compact_codes</a></div><div class="ttdeci">uint8_t * compact_codes</div><div class="ttdoc">size ntotal * code_size </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00219">IndexIVFPQ.h:219</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ad99c215aeaf92e995cb97f4044c4d267"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">faiss::IndexIVFPQ::precompute_table</a></div><div class="ttdeci">void precompute_table()</div><div class="ttdoc">build precomputed table </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00356">IndexIVFPQ.cpp:356</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a31a1fec2a88b410ea96ce5be7d527be9"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9">faiss::IndexIVFPQR::merge_from</a></div><div class="ttdeci">void merge_from(IndexIVF &other, idx_t add_id) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01275">IndexIVFPQ.cpp:1275</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a28ce697b1381eb7e7d7d25774a25e175"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a28ce697b1381eb7e7d7d25774a25e175">faiss::IndexIVFPQ::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00303">IndexIVFPQ.cpp:303</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html">faiss::IndexIVFPQR</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00159">IndexIVFPQ.h:159</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a7afbf9d96276f021981e99f064254208"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">faiss::ProductQuantizer::decode</a></div><div class="ttdeci">void decode(const uint8_t *code, float *x) const </div><div class="ttdoc">decode a vector from a given code (or n vectors if third argument) </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00338">ProductQuantizer.cpp:338</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a4a80540e7cdfb3e43712ffb93e083a7c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">faiss::IndexIVFPQR::refine_pq</a></div><div class="ttdeci">ProductQuantizer refine_pq</div><div class="ttdoc">3rd level quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00160">IndexIVFPQ.h:160</a></div></div>
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<div class="ttc" id="namespacefaiss_html_a7466bd32de31640860393a701eaac5ad"><div class="ttname"><a href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">faiss::fvec_L2sqr</a></div><div class="ttdeci">float fvec_L2sqr(const float *x, const float *y, size_t d)</div><div class="ttdoc">Squared L2 distance between two vectors. </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00481">utils.cpp:481</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a2b14cbb5acb3fc28a4df8fde3f5567cd"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">faiss::IndexIVFPQ::polysemous_training</a></div><div class="ttdeci">PolysemousTraining * polysemous_training</div><div class="ttdoc">if NULL, use default </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00035">IndexIVFPQ.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1HeapArray_html_ae97911f6f85d152a5b45e459063b6858"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">faiss::HeapArray::get_val</a></div><div class="ttdeci">T * get_val(size_t key)</div><div class="ttdoc">Return the list of values for a heap. </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00360">Heap.h:360</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_ade7b46bbbcaf244ad680104380afb1b8"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#ade7b46bbbcaf244ad680104380afb1b8">faiss::IndexIVFPQCompact::add</a></div><div class="ttdeci">void add(idx_t, const float *) override</div><div class="ttdoc">the three following functions will fail at runtime </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01371">IndexIVFPQ.cpp:1371</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a0f0d8fc6b2c6aa2431c1730111a3b22a"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a0f0d8fc6b2c6aa2431c1730111a3b22a">faiss::IndexIVFPQR::reconstruct_n</a></div><div class="ttdeci">void reconstruct_n(idx_t i0, idx_t ni, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01256">IndexIVFPQ.cpp:1256</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_ada9e5292194ee1be42d122037fbf2502"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#ada9e5292194ee1be42d122037fbf2502">faiss::IndexIVFPQCompact::search_preassigned</a></div><div class="ttdeci">void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01401">IndexIVFPQ.cpp:1401</a></div></div>
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<div class="ttc" id="namespacefaiss_html_a14884d253128c7af5891a65082ad7dc6"><div class="ttname"><a href="namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6">faiss::fvecs_maybe_subsample</a></div><div class="ttdeci">const float * fvecs_maybe_subsample(size_t d, size_t *n, size_t nmax, const float *x, bool verbose, long seed)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01941">utils.cpp:1941</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_affed235eadf27a13d753ee4d33a1dc58"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">faiss::IndexIVF::nprobe</a></div><div class="ttdeci">size_t nprobe</div><div class="ttdoc">number of probes at query time </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00047">IndexIVF.h:47</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c"><div class="ttname"><a href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">faiss::Index::assign</a></div><div class="ttdeci">void assign(idx_t n, const float *x, idx_t *labels, idx_t k=1)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00023">Index.cpp:23</a></div></div>
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<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00052">AuxIndexStructures.h:52</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a23ee7f75f8be4472a17778f2b33875de"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a23ee7f75f8be4472a17778f2b33875de">faiss::IndexIVF::quantizer_trains_alone</a></div><div class="ttdeci">bool quantizer_trains_alone</div><div class="ttdoc">just pass over the trainset to quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00050">IndexIVF.h:50</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_ab2698c5d65644a171c53ffe39e420b70a38c1b1ed9ebdbd4b0047be13080094bb"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70a38c1b1ed9ebdbd4b0047be13080094bb">faiss::IndexIVFPQCompact::Alloc_type_mmap</a></div><div class="ttdoc">was mmapped </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00212">IndexIVFPQ.h:212</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ae1fb0cc3051dec8e322a78c443f8fc9a"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">faiss::IndexIVFPQ::decode_multiple</a></div><div class="ttdeci">void decode_multiple(size_t n, const long *keys, const uint8_t *xcodes, float *x) const </div><div class="ttdoc">inverse of encode_multiple </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00169">IndexIVFPQ.cpp:169</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a4e06f04853dcb424dc393de5f641e917"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">faiss::IndexIVFPQ::train_residual_o</a></div><div class="ttdeci">void train_residual_o(idx_t n, const float *x, float *residuals_2)</div><div class="ttdoc">same as train_residual, also output 2nd level residuals </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00071">IndexIVFPQ.cpp:71</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a9d5373633df7a9bec4de69400b9adeed"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">faiss::IndexIVFPQ::do_polysemous_training</a></div><div class="ttdeci">bool do_polysemous_training</div><div class="ttdoc">reorder PQ centroids after training? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00034">IndexIVFPQ.h:34</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a7430fc4fa030c96497abced3b68358d4"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">faiss::IndexIVFPQ::scan_table_threshold</a></div><div class="ttdeci">size_t scan_table_threshold</div><div class="ttdoc">use table computation or on-the-fly? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00038">IndexIVFPQ.h:38</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a68ed7cae5bec89fcdcb6a1d2addbd5a8"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8">faiss::IndexIVFPQR::train_residual</a></div><div class="ttdeci">void train_residual(idx_t n, const float *x) override</div><div class="ttdoc">trains the two product quantizers </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01124">IndexIVFPQ.cpp:1124</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a186b746f22b65ddf416b1e821b0866ec"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">faiss::IndexIVFPQR::add_core</a></div><div class="ttdeci">void add_core(idx_t n, const float *x, const long *xids, const long *precomputed_idx=nullptr)</div><div class="ttdoc">same as add_with_ids, but optionally use the precomputed list ids </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01148">IndexIVFPQ.cpp:1148</a></div></div>
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<div class="ttc" id="structfaiss_1_1ScopeDeleter_html"><div class="ttname"><a href="structfaiss_1_1ScopeDeleter.html">faiss::ScopeDeleter</a></div><div class="ttdef"><b>Definition:</b> <a href="FaissException_8h_source.html#l00039">FaissException.h:39</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_a146ccc5a05aed1d2e96df8c1d3f7663d"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#a146ccc5a05aed1d2e96df8c1d3f7663d">faiss::IndexIVFPQCompact::limits</a></div><div class="ttdeci">uint32_t * limits</div><div class="ttdoc">size nlist + 1 </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00217">IndexIVFPQ.h:217</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a467b451ca203544e42c250e4be65b983"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">faiss::ProductQuantizer::dsub</a></div><div class="ttdeci">size_t dsub</div><div class="ttdoc">dimensionality of each subvector </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00032">ProductQuantizer.h:32</a></div></div>
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<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_a509c65e2ebe6ecabebd163ecb03c5579"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579">faiss::ClusteringParameters::seed</a></div><div class="ttdeci">int seed</div><div class="ttdoc">seed for the random number generator </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00035">Clustering.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a9b310195d610c3e326471b3758206b59"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">faiss::IndexIVFPQ::precomputed_table</a></div><div class="ttdeci">std::vector< float > precomputed_table</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00045">IndexIVFPQ.h:45</a></div></div>
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<div class="ttc" id="namespacefaiss_html_a40328c31abd0bbba5bd95d7de951e847"><div class="ttname"><a href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">faiss::fvec_madd</a></div><div class="ttdeci">void fvec_madd(size_t n, const float *a, float bf, const float *b, float *c)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01855">utils.cpp:1855</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a3093a0a3e128eafce6e0583b75e9662e"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">faiss::IndexIVFPQ::polysemous_ht</a></div><div class="ttdeci">int polysemous_ht</div><div class="ttdoc">Hamming thresh for polysemous filtering. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00040">IndexIVFPQ.h:40</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_ae0e979a014a9defe2254e9543657b075"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075">faiss::IndexIVFPQR::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01115">IndexIVFPQ.cpp:1115</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a981c2748bfbd9b018494f119279a0342"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">faiss::IndexIVFPQ::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids=nullptr) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00186">IndexIVFPQ.cpp:186</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_af16d325f5bef22b2e5f90ceea796e80d"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">faiss::IndexIVF::ids</a></div><div class="ttdeci">std::vector< std::vector< long > > ids</div><div class="ttdoc">Inverted lists for indexes. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00055">IndexIVF.h:55</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_ae5a340ee5a4b1d35a565b167de2a2ef1"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">faiss::ProductQuantizer::compute_codes</a></div><div class="ttdeci">void compute_codes(const float *x, uint8_t *codes, size_t n) const </div><div class="ttdoc">same as compute_code for several vectors </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00385">ProductQuantizer.cpp:385</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a4b40cc7a70dff41196a3b8769586667a"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">faiss::IndexIVF::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00049">IndexIVF.h:49</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a77501995b3671e377102d2db1a93ade4"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a77501995b3671e377102d2db1a93ade4">faiss::IndexIVFPQ::max_codes</a></div><div class="ttdeci">size_t max_codes</div><div class="ttdoc">max nb of codes to visit to do a query </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00039">IndexIVFPQ.h:39</a></div></div>
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<div class="ttc" id="structfaiss_1_1CodeCmp_html"><div class="ttname"><a href="structfaiss_1_1CodeCmp.html">faiss::CodeCmp</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01046">IndexIVFPQ.cpp:1046</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a588bd0b733c8db18eaeb7bc287afd16e"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">faiss::IndexIVFPQR::refine_codes</a></div><div class="ttdeci">std::vector< uint8_t > refine_codes</div><div class="ttdoc">corresponding codes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00161">IndexIVFPQ.h:161</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_aa61330eadb84772b71018b093773a5f9"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">faiss::ProductQuantizer::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">byte per indexed vector </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00034">ProductQuantizer.h:34</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_af6565a5d8bab7be3df19c50d235bd662"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">faiss::IndexIVFPQ::train_residual</a></div><div class="ttdeci">void train_residual(idx_t n, const float *x) override</div><div class="ttdoc">trains the product quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00065">IndexIVFPQ.cpp:65</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html">faiss::IndexIVFPQ</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00029">IndexIVFPQ.h:29</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a1ae6cdd996bbd398fa4e87646c8f3ba6"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">faiss::IndexIVFPQ::encode_multiple</a></div><div class="ttdeci">void encode_multiple(size_t n, long *keys, const float *x, uint8_t *codes, bool compute_keys=false) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00150">IndexIVFPQ.cpp:150</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_a0ef8132fae22a50616fe1201c8b20588"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#a0ef8132fae22a50616fe1201c8b20588">faiss::IndexIVFPQCompact::train</a></div><div class="ttdeci">void train(idx_t, const float *) override</div><div class="ttdoc">Trains the quantizer and calls train_residual to train sub-quantizers. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01379">IndexIVFPQ.cpp:1379</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_aed2e9757ad5f3c234fd8ad60175a2a73"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aed2e9757ad5f3c234fd8ad60175a2a73">faiss::IndexIVF::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">whether object owns the quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00051">IndexIVF.h:51</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a0feee45e4151547b7a0444c14bad398f"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">faiss::ProductQuantizer::ksub</a></div><div class="ttdeci">size_t ksub</div><div class="ttdoc">number of centroids for each subquantizer </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00035">ProductQuantizer.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1HeapArray_html"><div class="ttname"><a href="structfaiss_1_1HeapArray.html">faiss::HeapArray</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00350">Heap.h:350</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a08b130e3a21f2699a4e3bbec121fb838"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">faiss::ProductQuantizer::compute_code</a></div><div class="ttdeci">void compute_code(const float *x, uint8_t *code) const </div><div class="ttdoc">Quantize one vector with the product quantizer. </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00311">ProductQuantizer.cpp:311</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00065">Index.h:65</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a5590d847c5c2b958affd2a05e58a6f23"><div class="ttname"><a href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">faiss::Index::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbosity level </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a47a3b7665e9d2be41c6d3b2e9144b73f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">faiss::IndexIVF::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00110">IndexIVF.cpp:110</a></div></div>
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<div class="ttc" id="namespacefaiss_html_af2a71f7d5402ae02ce169a4cc83020eb"><div class="ttname"><a href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">faiss::getmillisecs</a></div><div class="ttdeci">double getmillisecs()</div><div class="ttdoc">ms elapsed since some arbitrary epoch </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00070">utils.cpp:70</a></div></div>
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<div class="ttc" id="structfaiss_1_1PolysemousTraining_html"><div class="ttname"><a href="structfaiss_1_1PolysemousTraining.html">faiss::PolysemousTraining</a></div><div class="ttdoc">optimizes the order of indices in a ProductQuantizer </div><div class="ttdef"><b>Definition:</b> <a href="PolysemousTraining_8h_source.html#l00125">PolysemousTraining.h:125</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7"><div class="ttname"><a href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">faiss::Index::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0</div></div>
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<div class="ttc" id="structfaiss_1_1MultiIndexQuantizer_html"><div class="ttname"><a href="structfaiss_1_1MultiIndexQuantizer.html">faiss::MultiIndexQuantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00135">IndexPQ.h:135</a></div></div>
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<div class="ttc" id="namespacefaiss_html_a7a49180ebf10e643217bbce5862c7f84"><div class="ttname"><a href="namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84">faiss::fvec_norm_L2sqr</a></div><div class="ttdeci">float fvec_norm_L2sqr(const float *x, size_t d)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00538">utils.cpp:538</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_af265acf5aa1bcda60898002287e6a3d6"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">faiss::ProductQuantizer::cp</a></div><div class="ttdeci">ClusteringParameters cp</div><div class="ttdoc">parameters used during clustering </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00049">ProductQuantizer.h:49</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_afd13b471df293ae5a6e895704c69a4c3"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">faiss::IndexIVFPQ::by_residual</a></div><div class="ttdeci">bool by_residual</div><div class="ttdoc">Encode residual or plain vector? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00030">IndexIVFPQ.h:30</a></div></div>
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<div class="ttc" id="structfaiss_1_1HeapArray_html_af6aa57addaa1bc754d09a2a08be4df49"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">faiss::HeapArray::get_ids</a></div><div class="ttdeci">TI * get_ids(size_t key)</div><div class="ttdoc">Correspponding identifiers. </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00363">Heap.h:363</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00072">Index.h:72</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_ab2698c5d65644a171c53ffe39e420b70a3d58d7b26146791f0fe34b35a9b0fd95"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70a3d58d7b26146791f0fe34b35a9b0fd95">faiss::IndexIVFPQCompact::Alloc_type_none</a></div><div class="ttdoc">alloc from outside </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00210">IndexIVFPQ.h:210</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a007303be116c8da65b6d058e3fc77d16"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">faiss::IndexIVFPQ::pq</a></div><div class="ttdeci">ProductQuantizer pq</div><div class="ttdoc">produces the codes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00032">IndexIVFPQ.h:32</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a83600e328893ce5f41fe459f5a3acf41"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">faiss::ProductQuantizer::M</a></div><div class="ttdeci">size_t M</div><div class="ttdoc">number of subquantizers </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00028">ProductQuantizer.h:28</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_ab38fde4c923abefc4185eb7450b5b95b"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">faiss::IndexIVF::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00046">IndexIVF.h:46</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00060">Index.h:60</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a1df10e9e5f4ff0dabf283f19ad94bbd4"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a1df10e9e5f4ff0dabf283f19ad94bbd4">faiss::IndexIVFPQ::reconstruct_n</a></div><div class="ttdeci">void reconstruct_n(idx_t i0, idx_t ni, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00274">IndexIVFPQ.cpp:274</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ac0cb8421b9885d691696d2ff4f76894b"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">faiss::IndexIVFPQ::add_core_o</a></div><div class="ttdeci">void add_core_o(idx_t n, const float *x, const long *xids, float *residuals_2, const long *precomputed_idx=nullptr)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00192">IndexIVFPQ.cpp:192</a></div></div>
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<div class="ttc" id="namespacefaiss_html_a9da63b8bb84460f5e8ccf8e17622cc7a"><div class="ttname"><a href="namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a">faiss::fvec_madd_and_argmin</a></div><div class="ttdeci">int fvec_madd_and_argmin(size_t n, const float *a, float bf, const float *b, float *c)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01929">utils.cpp:1929</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_acc5eeeeb8ac8d2581ef07947932d9f6c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c">faiss::IndexIVFPQR::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &sel) override</div><div class="ttdoc">Dataset manipulation functions. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01288">IndexIVFPQ.cpp:1288</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a150a37cf3e8a7e37cb8dab1d5678bc02"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a150a37cf3e8a7e37cb8dab1d5678bc02">faiss::IndexIVFPQ::search_preassigned</a></div><div class="ttdeci">void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00931">IndexIVFPQ.cpp:931</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html">faiss::ProductQuantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00025">ProductQuantizer.h:25</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_a8f5eccfb4d5e4098ff6c00acb3bc40a1"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#a8f5eccfb4d5e4098ff6c00acb3bc40a1">faiss::IndexIVFPQCompact::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01375">IndexIVFPQ.cpp:1375</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00069">Index.h:69</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_aaae77608bbda70b1098897e9167a82f9"><div class="ttname"><a href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">faiss::Index::compute_residual</a></div><div class="ttdeci">void compute_residual(const float *x, float *residual, idx_t key) const </div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00057">Index.cpp:57</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a4f0f33c011dffe633a1748a48a082c22"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">faiss::ProductQuantizer::get_centroids</a></div><div class="ttdeci">float * get_centroids(size_t m, size_t i)</div><div class="ttdoc">return the centroids associated with subvector m </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00055">ProductQuantizer.h:55</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_aaef6f4132b1f390121ebb11058baf190"><div class="ttname"><a href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">faiss::Index::reconstruct</a></div><div class="ttdeci">virtual void reconstruct(idx_t key, float *recons) const </div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00043">Index.cpp:43</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQCompact_html_ab2698c5d65644a171c53ffe39e420b70acf2d6ba8878a2778383adc32593ba8e6"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQCompact.html#ab2698c5d65644a171c53ffe39e420b70acf2d6ba8878a2778383adc32593ba8e6">faiss::IndexIVFPQCompact::Alloc_type_new</a></div><div class="ttdoc">was allocated with new </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00211">IndexIVFPQ.h:211</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_aedd0c14b5654295b291638ec7f9f9517"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">faiss::IndexIVF::maintain_direct_map</a></div><div class="ttdeci">bool maintain_direct_map</div><div class="ttdoc">map for direct access to the elements. Enables reconstruct(). </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00061">IndexIVF.h:61</a></div></div>
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<div class="ttc" id="structfaiss_1_1PolysemousTraining_html_a995374ba2f0bc2738edae72ca9142f82"><div class="ttname"><a href="structfaiss_1_1PolysemousTraining.html#a995374ba2f0bc2738edae72ca9142f82">faiss::PolysemousTraining::optimize_pq_for_hamming</a></div><div class="ttdeci">void optimize_pq_for_hamming(ProductQuantizer &pq, size_t n, const float *x) const </div><div class="ttdef"><b>Definition:</b> <a href="PolysemousTraining_8cpp_source.html#l00933">PolysemousTraining.cpp:933</a></div></div>
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<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_a993e0a035248faad6e292a5ef9af1953"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">faiss::ClusteringParameters::max_points_per_centroid</a></div><div class="ttdeci">int max_points_per_centroid</div><div class="ttdoc">to limit size of dataset </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00033">Clustering.h:33</a></div></div>
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<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a1e4056fa3938ed8c9fe701e90d94ad95"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a1e4056fa3938ed8c9fe701e90d94ad95">faiss::ProductQuantizer::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbose during training? </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00036">ProductQuantizer.h:36</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a4b6154a5194d574d037ba78c137a2fa5"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5">faiss::IndexIVFPQR::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01144">IndexIVFPQ.cpp:1144</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a3e982ee6f1a3a025148270701867d04f"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a3e982ee6f1a3a025148270701867d04f">faiss::IndexIVFPQR::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01167">IndexIVFPQ.cpp:1167</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a0f22cc237c30c935df5b6560aecf8f01"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">faiss::IndexIVF::merge_from</a></div><div class="ttdeci">virtual void merge_from(IndexIVF &other, idx_t add_id)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00221">IndexIVF.cpp:221</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a46d1aeddb60643c5b3f096147c3e028f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">faiss::IndexIVF::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00057">IndexIVF.h:57</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_aee355b57acde203a3caed46a93e16a3c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c">faiss::IndexIVFPQ::find_duplicates</a></div><div class="ttdeci">size_t find_duplicates(idx_t *ids, size_t *lims) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01059">IndexIVFPQ.cpp:1059</a></div></div>
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<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product vetsion and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00043">Index.h:43</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a0b02a4151ceacc070352f8b15cc0ee0b"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a0b02a4151ceacc070352f8b15cc0ee0b">faiss::IndexIVFPQR::k_factor</a></div><div class="ttdeci">float k_factor</div><div class="ttdoc">factor between k requested in search and the k requested from the IVFPQ </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00164">IndexIVFPQ.h:164</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a1c66ff073c18a1edbe8444c24d870583"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">faiss::IndexIVFPQ::use_precomputed_table</a></div><div class="ttdeci">int use_precomputed_table</div><div class="ttdoc">if by_residual, build precompute tables </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00031">IndexIVFPQ.h:31</a></div></div>
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