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0df3f646fc
various bugfixes from github issues kmean with some frozen centroids GPU better tiling for large flat datasets default AVX for vector ops
259 lines
33 KiB
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259 lines
33 KiB
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<li class="navelem"><a class="el" href="dir_6b3ae6988449b0834e9596fad5d75199.html">gpu</a></li> </ul>
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<div class="title">GpuIndex.cu</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> </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "GpuIndex.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "../FaissAssert.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "GpuResources.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "utils/DeviceUtils.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <stdio.h></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</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="comment">// Default size for which we page add or search</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> constexpr <span class="keywordtype">size_t</span> kAddPageSize = (size_t) 256 * 1024 * 1024;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> constexpr <span class="keywordtype">size_t</span> kSearchPageSize = (size_t) 256 * 1024 * 1024;</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="comment">// Or, maximum number of vectors to consider per page of add or search</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> constexpr <span class="keywordtype">size_t</span> kAddVecSize = (size_t) 512 * 1024;</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">// Use a smaller search size, as precomputed code usage on IVFPQ</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// requires substantial amounts of memory</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// FIXME: parameterize based on algorithm need</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> constexpr <span class="keywordtype">size_t</span> kSearchVecSize = (size_t) 32 * 1024;</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> GpuIndex::GpuIndex(GpuResources* resources,</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordtype">int</span> dims,</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a> metric,</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  GpuIndexConfig config) :</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  Index(dims, metric),</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  resources_(resources),</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  device_(config.device),</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  memorySpace_(config.memorySpace) {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  FAISS_THROW_IF_NOT_FMT(device_ < getNumDevices(),</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="stringliteral">"Invalid GPU device %d"</span>, device_);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  FAISS_THROW_IF_NOT_MSG(dims > 0, <span class="stringliteral">"Invalid number of dimensions"</span>);</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#ifdef FAISS_UNIFIED_MEM</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor"></span> FAISS_THROW_IF_NOT_FMT(</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  memorySpace_ == MemorySpace::Device ||</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  (memorySpace_ == MemorySpace::Unified &&</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  getFullUnifiedMemSupport(device_)),</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="stringliteral">"Device %d does not support full CUDA 8 Unified Memory (CC 6.0+)"</span>,</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  config.device);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor"></span> FAISS_THROW_IF_NOT_MSG(memorySpace_ == MemorySpace::Device,</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="stringliteral">"Must compile with CUDA 8+ for Unified Memory support"</span>);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  FAISS_ASSERT(resources_);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  resources_->initializeForDevice(device_);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> }</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7"> 61</a></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7">GpuIndex::add</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">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="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2">addInternal_</a>(n, x, <span class="keyword">nullptr</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"> 65</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88"> 66</a></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88">GpuIndex::add_with_ids</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* ids) {</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2">addInternal_</a>(n, x, ids);</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"> 71</span> </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2"> 73</a></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2">GpuIndex::addInternal_</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* ids) {</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> scope(<a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142">device_</a>);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  FAISS_THROW_IF_NOT_MSG(this-><a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>, <span class="stringliteral">"Index not trained"</span>);</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">if</span> (n > 0) {</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">size_t</span> totalSize = n * (size_t) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * <span class="keyword">sizeof</span>(<span class="keywordtype">float</span>);</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">if</span> (totalSize > kAddPageSize || n > kAddVecSize) {</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// How many vectors fit into kAddPageSize?</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">size_t</span> maxNumVecsForPageSize =</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  kAddPageSize / ((size_t) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * <span class="keyword">sizeof</span>(<span class="keywordtype">float</span>));</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// Always add at least 1 vector, if we have huge vectors</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  maxNumVecsForPageSize = std::max(maxNumVecsForPageSize, (<span class="keywordtype">size_t</span>) 1);</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">size_t</span> tileSize = std::min((<span class="keywordtype">size_t</span>) n, maxNumVecsForPageSize);</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  tileSize = std::min(tileSize, kSearchVecSize);</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="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i += tileSize) {</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">size_t</span> curNum = std::min(tileSize, n - i);</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>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f">addImpl_</a>(curNum,</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  x + i * (<span class="keywordtype">size_t</span>) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>,</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  ids ? ids + i : <span class="keyword">nullptr</span>);</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f">addImpl_</a>(n, x, ids);</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  }</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> }</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f"> 108</a></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f">GpuIndex::search</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> k,</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">float</span>* distances,</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* labels)<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> scope(<a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142">device_</a>);</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  FAISS_THROW_IF_NOT_MSG(this-><a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>, <span class="stringliteral">"Index not trained"</span>);</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (n > 0) {</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">size_t</span> totalSize = n * (size_t) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * <span class="keyword">sizeof</span>(<span class="keywordtype">float</span>);</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> ((totalSize > kSearchPageSize) || (n > kSearchVecSize)) {</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">// How many vectors fit into kSearchPageSize?</span></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// Just consider `x`, not the size of `distances` or `labels`</span></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// since they should be small, relatively speaking</span></div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">size_t</span> maxNumVecsForPageSize =</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  kSearchPageSize / ((size_t) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * <span class="keyword">sizeof</span>(<span class="keywordtype">float</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>  <span class="comment">// Always search at least 1 vector, if we have huge vectors</span></div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  maxNumVecsForPageSize = std::max(maxNumVecsForPageSize, (<span class="keywordtype">size_t</span>) 1);</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">size_t</span> tileSize = std::min((<span class="keywordtype">size_t</span>) n, maxNumVecsForPageSize);</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  tileSize = std::min(tileSize, kSearchVecSize);</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>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i += tileSize) {</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordtype">size_t</span> curNum = std::min(tileSize, n - i);</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04">searchImpl_</a>(curNum,</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  x + i * (<span class="keywordtype">size_t</span>) this-><a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>,</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  k,</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  distances + i * k,</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  labels + i * k);</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>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04">searchImpl_</a>(n, x, k, distances, labels);</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> } } <span class="comment">// namespace</span></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a6f1cadb5e8970c9c1fdf15eddb9d874f"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f">faiss::gpu::GpuIndex::search</a></div><div class="ttdeci">void search(faiss::Index::idx_t n, const float *x, faiss::Index::idx_t k, float *distances, faiss::Index::idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00108">GpuIndex.cu:108</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a482408e73bfa420d46eed690f2936e04"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04">faiss::gpu::GpuIndex::searchImpl_</a></div><div class="ttdeci">virtual void searchImpl_(faiss::Index::idx_t n, const float *x, faiss::Index::idx_t k, float *distances, faiss::Index::idx_t *labels) const =0</div><div class="ttdoc">Overridden to actually perform the search. </div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a90a4b0c76c15512d1d231383c404d8d2"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2">faiss::gpu::GpuIndex::addInternal_</a></div><div class="ttdeci">void addInternal_(Index::idx_t n, const float *x, const Index::idx_t *ids)</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00073">GpuIndex.cu:73</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a47f6969fe60d82b8e3407557ba9eec88"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88">faiss::gpu::GpuIndex::add_with_ids</a></div><div class="ttdeci">void add_with_ids(Index::idx_t n, const float *x, const Index::idx_t *ids) override</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00066">GpuIndex.cu:66</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="classfaiss_1_1gpu_1_1GpuIndex_html_a67750633faa35677ee505a1e61cfe142"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142">faiss::gpu::GpuIndex::device_</a></div><div class="ttdeci">const int device_</div><div class="ttdoc">The GPU device we are resident on. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8h_source.html#l00094">GpuIndex.h:94</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="classfaiss_1_1gpu_1_1GpuIndex_html_a345819c6214c2a6eb7874dde1145036f"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f">faiss::gpu::GpuIndex::addImpl_</a></div><div class="ttdeci">virtual void addImpl_(Index::idx_t n, const float *x, const Index::idx_t *ids)=0</div><div class="ttdoc">Overridden to actually perform the add. </div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_af576341f6996b0e80e26b9748db51eb7"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7">faiss::gpu::GpuIndex::add</a></div><div class="ttdeci">void add(faiss::Index::idx_t, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00061">GpuIndex.cu:61</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1DeviceScope_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1DeviceScope.html">faiss::gpu::DeviceScope</a></div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8h_source.html#l00065">DeviceUtils.h:65</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="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#l00043">Index.h:43</a></div></div>
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