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270 lines
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<div class="title">GpuIndexIVFPQ.h</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) Facebook, Inc. and its affiliates.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</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="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</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="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "GpuIndexIVF.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>faiss { <span class="keyword">struct </span>IndexIVFPQ; }</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">class </span>GpuIndexFlat;</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">class </span>IVFPQ;</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"><a class="line" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html"> 21</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a> : <span class="keyword">public</span> <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFConfig.html">GpuIndexIVFConfig</a> {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a>()</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  : <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#a9dbbec78d77d90b7b150f543e477cc49">useFloat16LookupTables</a>(<span class="keyword">false</span>),</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#ae5b5c7acc06743e5bcca197bc33c30ec">usePrecomputedTables</a>(<span class="keyword">false</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="comment"></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> /// Whether or not float16 residual distance tables are used in the</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> /// list scanning kernels. When subQuantizers * 2^bitsPerCode ></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> /// 16384, this is required.</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#a9dbbec78d77d90b7b150f543e477cc49"> 30</a></span> <span class="comment"></span> <span class="keywordtype">bool</span> <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#a9dbbec78d77d90b7b150f543e477cc49">useFloat16LookupTables</a>;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"></span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> /// Whether or not we enable the precomputed table option for</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> /// search, which can substantially increase the memory requirement.</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#ae5b5c7acc06743e5bcca197bc33c30ec"> 34</a></span> <span class="comment"></span> <span class="keywordtype">bool</span> <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#ae5b5c7acc06743e5bcca197bc33c30ec">usePrecomputedTables</a>;</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> };</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"></span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/// IVFPQ index for the GPU</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html"> 38</a></span> <span class="comment"></span><span class="keyword">class </span><a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html">GpuIndexIVFPQ</a> : <span class="keyword">public</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVF.html">GpuIndexIVF</a> {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">public</span>:<span class="comment"></span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> /// Construct from a pre-existing faiss::IndexIVFPQ instance, copying</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> /// data over to the given GPU, if the input index is trained.</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a56a552e8c2e29f33c39883145bd7629c">GpuIndexIVFPQ</a>(<a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">GpuResources</a>* resources,</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html">faiss::IndexIVFPQ</a>* index,</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a> config = <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a>());</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"></span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> /// Construct an empty index</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a56a552e8c2e29f33c39883145bd7629c">GpuIndexIVFPQ</a>(<a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">GpuResources</a>* resources,</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">int</span> dims,</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">int</span> nlist,</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">int</span> subQuantizers,</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">int</span> bitsPerCode,</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a> metric,</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a> config = <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a>());</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  ~<a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html">GpuIndexIVFPQ</a>() <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"></span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /// Reserve space on the GPU for the inverted lists for `num`</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// vectors, assumed equally distributed among</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span><span class="comment"></span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> /// Initialize ourselves from the given CPU index; will overwrite</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// all data in ourselves</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a8d48f79af9080b55706050244fc24f0e">copyFrom</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html">faiss::IndexIVFPQ</a>* index);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /// Copy ourselves to the given CPU index; will overwrite all data</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> /// in the index instance</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#aad10de2407911e9adf42c1be5c5dd390">copyTo</a>(<a class="code" href="structfaiss_1_1IndexIVFPQ.html">faiss::IndexIVFPQ</a>* index) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> /// Reserve GPU memory in our inverted lists for this number of vectors</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a4e7d62e21f7e23fa4e94c69131389eea">reserveMemory</a>(<span class="keywordtype">size_t</span> numVecs);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"></span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> /// Enable or disable pre-computed codes</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#afda2894c0ce520e0d3d06eeca5ed5f0c">setPrecomputedCodes</a>(<span class="keywordtype">bool</span> enable);</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> /// Are pre-computed codes enabled?</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span> <span class="keywordtype">bool</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a679b0aaa229d571aeb842673e3493cc5">getPrecomputedCodes</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"></span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> /// Return the number of sub-quantizers we are using</span></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"></span> <span class="keywordtype">int</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a3869ea7898487334fb67ee499f38988d">getNumSubQuantizers</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span></div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> /// Return the number of bits per PQ code</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span> <span class="keywordtype">int</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#af87058de254e1430587a16b76f1e4377">getBitsPerCode</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"></span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> /// Return the number of centroids per PQ code (2^bits per code)</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"></span> <span class="keywordtype">int</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a2f50e79af6727962cd89534438d4769e">getCentroidsPerSubQuantizer</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"></span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> /// After adding vectors, one can call this to reclaim device memory</span></div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> /// to exactly the amount needed. Returns space reclaimed in bytes</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"></span> <span class="keywordtype">size_t</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a83831088d9593f753560965172ccb0a0">reclaimMemory</a>();</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"></span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> /// Clears out all inverted lists, but retains the coarse and</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> /// product centroid information</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a3a43a70461e09ef87bdb7b48ec420dd2">reset</a>() <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#ac4814acafa4bc340a4c4bdcafd469b56">train</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"></span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> /// For debugging purposes, return the list length of a particular</span></div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> /// list</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"></span> <span class="keywordtype">int</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#ab7f77961857e560b4dbb81888a8c8bf8">getListLength</a>(<span class="keywordtype">int</span> listId) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"></span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> /// For debugging purposes, return the list codes of a particular</span></div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> /// list</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"></span> std::vector<unsigned char> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a98f0000872701f9f23ac2073723a0aa7">getListCodes</a>(<span class="keywordtype">int</span> listId) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"></span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> /// For debugging purposes, return the list indices of a particular</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> /// list</span></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"></span> std::vector<long> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a5235cf241ef98e6012fd01907ec705d0">getListIndices</a>(<span class="keywordtype">int</span> listId) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">protected</span>:<span class="comment"></span></div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> /// Called from GpuIndex for add/add_with_ids</span></div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#aa0468cf70921073b3ba798fe753531eb">addImpl_</a>(<span class="keywordtype">int</span> n,</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a>* ids) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"></span></div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> /// Called from GpuIndex for search</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a73a06501e87117e5f620bb07d7c1e54d">searchImpl_</a>(<span class="keywordtype">int</span> n,</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">int</span> k,</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">float</span>* distances,</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a>* labels) <span class="keyword">const override</span>;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">void</span> verifySettings_() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">void</span> trainResidualQuantizer_(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::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="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">GpuIndexIVFPQConfig</a> ivfpqConfig_;</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"></span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> /// Number of sub-quantizers per encoded vector</span></div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"></span> <span class="keywordtype">int</span> subQuantizers_;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"></span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> /// Bits per sub-quantizer code</span></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"></span> <span class="keywordtype">int</span> bitsPerCode_;</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"></span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> /// Desired inverted list memory reservation</span></div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"></span> <span class="keywordtype">size_t</span> reserveMemoryVecs_;</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"></span></div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> /// The product quantizer instance that we own; contains the</span></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> /// inverted lists</span></div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"></span> <a class="code" href="classfaiss_1_1gpu_1_1IVFPQ.html">IVFPQ</a>* index_;</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> };</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="comment">// namespace</span></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a5235cf241ef98e6012fd01907ec705d0"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a5235cf241ef98e6012fd01907ec705d0">faiss::gpu::GpuIndexIVFPQ::getListIndices</a></div><div class="ttdeci">std::vector< long > getListIndices(int listId) const </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00379">GpuIndexIVFPQ.cu:379</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a3a43a70461e09ef87bdb7b48ec420dd2"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a3a43a70461e09ef87bdb7b48ec420dd2">faiss::gpu::GpuIndexIVFPQ::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00246">GpuIndexIVFPQ.cu:246</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig_html_ae5b5c7acc06743e5bcca197bc33c30ec"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#ae5b5c7acc06743e5bcca197bc33c30ec">faiss::gpu::GpuIndexIVFPQConfig::usePrecomputedTables</a></div><div class="ttdeci">bool usePrecomputedTables</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8h_source.html#l00034">GpuIndexIVFPQ.h:34</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_aa0468cf70921073b3ba798fe753531eb"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#aa0468cf70921073b3ba798fe753531eb">faiss::gpu::GpuIndexIVFPQ::addImpl_</a></div><div class="ttdeci">void addImpl_(int n, const float *x, const Index::idx_t *ids) override</div><div class="ttdoc">Called from GpuIndex for add/add_with_ids. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00323">GpuIndexIVFPQ.cu:323</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a56a552e8c2e29f33c39883145bd7629c"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a56a552e8c2e29f33c39883145bd7629c">faiss::gpu::GpuIndexIVFPQ::GpuIndexIVFPQ</a></div><div class="ttdeci">GpuIndexIVFPQ(GpuResources *resources, const faiss::IndexIVFPQ *index, GpuIndexIVFPQConfig config=GpuIndexIVFPQConfig())</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00023">GpuIndexIVFPQ.cu:23</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_ab7f77961857e560b4dbb81888a8c8bf8"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#ab7f77961857e560b4dbb81888a8c8bf8">faiss::gpu::GpuIndexIVFPQ::getListLength</a></div><div class="ttdeci">int getListLength(int listId) const </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00365">GpuIndexIVFPQ.cu:365</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexIVFConfig_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexIVFConfig.html">faiss::gpu::GpuIndexIVFConfig</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVF_8h_source.html#l00023">GpuIndexIVF.h:23</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuResources_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuResources.html">faiss::gpu::GpuResources</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuResources_8h_source.html#l00021">GpuResources.h:21</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_af87058de254e1430587a16b76f1e4377"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#af87058de254e1430587a16b76f1e4377">faiss::gpu::GpuIndexIVFPQ::getBitsPerCode</a></div><div class="ttdeci">int getBitsPerCode() const </div><div class="ttdoc">Return the number of bits per PQ code. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00226">GpuIndexIVFPQ.cu:226</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig_html_a9dbbec78d77d90b7b150f543e477cc49"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html#a9dbbec78d77d90b7b150f543e477cc49">faiss::gpu::GpuIndexIVFPQConfig::useFloat16LookupTables</a></div><div class="ttdeci">bool useFloat16LookupTables</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8h_source.html#l00030">GpuIndexIVFPQ.h:30</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVF_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVF.html">faiss::gpu::GpuIndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVF_8h_source.html#l00035">GpuIndexIVF.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_ad3f0d3071f987baabbdd3da4500c87ea"><div class="ttname"><a href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">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="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_ac4814acafa4bc340a4c4bdcafd469b56"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#ac4814acafa4bc340a4c4bdcafd469b56">faiss::gpu::GpuIndexIVFPQ::train</a></div><div class="ttdeci">void train(Index::idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00302">GpuIndexIVFPQ.cu:302</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a83831088d9593f753560965172ccb0a0"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a83831088d9593f753560965172ccb0a0">faiss::gpu::GpuIndexIVFPQ::reclaimMemory</a></div><div class="ttdeci">size_t reclaimMemory()</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00236">GpuIndexIVFPQ.cu:236</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexIVFPQConfig.html">faiss::gpu::GpuIndexIVFPQConfig</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8h_source.html#l00021">GpuIndexIVFPQ.h:21</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#l00034">IndexIVFPQ.h:34</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a4e7d62e21f7e23fa4e94c69131389eea"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a4e7d62e21f7e23fa4e94c69131389eea">faiss::gpu::GpuIndexIVFPQ::reserveMemory</a></div><div class="ttdeci">void reserveMemory(size_t numVecs)</div><div class="ttdoc">Reserve GPU memory in our inverted lists for this number of vectors. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00196">GpuIndexIVFPQ.cu:196</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a8d48f79af9080b55706050244fc24f0e"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a8d48f79af9080b55706050244fc24f0e">faiss::gpu::GpuIndexIVFPQ::copyFrom</a></div><div class="ttdeci">void copyFrom(const faiss::IndexIVFPQ *index)</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00078">GpuIndexIVFPQ.cu:78</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a73a06501e87117e5f620bb07d7c1e54d"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a73a06501e87117e5f620bb07d7c1e54d">faiss::gpu::GpuIndexIVFPQ::searchImpl_</a></div><div class="ttdeci">void searchImpl_(int n, const float *x, int k, float *distances, Index::idx_t *labels) const override</div><div class="ttdoc">Called from GpuIndex for search. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00345">GpuIndexIVFPQ.cu:345</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_aad10de2407911e9adf42c1be5c5dd390"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#aad10de2407911e9adf42c1be5c5dd390">faiss::gpu::GpuIndexIVFPQ::copyTo</a></div><div class="ttdeci">void copyTo(faiss::IndexIVFPQ *index) const </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00142">GpuIndexIVFPQ.cu:142</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html">faiss::gpu::GpuIndexIVFPQ</a></div><div class="ttdoc">IVFPQ index for the GPU. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8h_source.html#l00038">GpuIndexIVFPQ.h:38</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a3869ea7898487334fb67ee499f38988d"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a3869ea7898487334fb67ee499f38988d">faiss::gpu::GpuIndexIVFPQ::getNumSubQuantizers</a></div><div class="ttdeci">int getNumSubQuantizers() const </div><div class="ttdoc">Return the number of sub-quantizers we are using. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00221">GpuIndexIVFPQ.cu:221</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a2f50e79af6727962cd89534438d4769e"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a2f50e79af6727962cd89534438d4769e">faiss::gpu::GpuIndexIVFPQ::getCentroidsPerSubQuantizer</a></div><div class="ttdeci">int getCentroidsPerSubQuantizer() const </div><div class="ttdoc">Return the number of centroids per PQ code (2^bits per code) </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00231">GpuIndexIVFPQ.cu:231</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_afda2894c0ce520e0d3d06eeca5ed5f0c"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#afda2894c0ce520e0d3d06eeca5ed5f0c">faiss::gpu::GpuIndexIVFPQ::setPrecomputedCodes</a></div><div class="ttdeci">void setPrecomputedCodes(bool enable)</div><div class="ttdoc">Enable or disable pre-computed codes. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00205">GpuIndexIVFPQ.cu:205</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a679b0aaa229d571aeb842673e3493cc5"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a679b0aaa229d571aeb842673e3493cc5">faiss::gpu::GpuIndexIVFPQ::getPrecomputedCodes</a></div><div class="ttdeci">bool getPrecomputedCodes() const </div><div class="ttdoc">Are pre-computed codes enabled? </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00216">GpuIndexIVFPQ.cu:216</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1IVFPQ_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1IVFPQ.html">faiss::gpu::IVFPQ</a></div><div class="ttdoc">Implementing class for IVFPQ on the GPU. </div><div class="ttdef"><b>Definition:</b> <a href="IVFPQ_8cuh_source.html#l00017">IVFPQ.cuh:17</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 version and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00044">Index.h:44</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexIVFPQ_html_a98f0000872701f9f23ac2073723a0aa7"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexIVFPQ.html#a98f0000872701f9f23ac2073723a0aa7">faiss::gpu::GpuIndexIVFPQ::getListCodes</a></div><div class="ttdeci">std::vector< unsigned char > getListCodes(int listId) const </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexIVFPQ_8cu_source.html#l00371">GpuIndexIVFPQ.cu:371</a></div></div>
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