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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment"></span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This source code is licensed under the CC-by-NC license found in the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "../Index.h"</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
<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>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">class </span>GpuResources;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html"> 20</a></span> <span class="keyword">class </span><a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html">GpuIndex</a> : <span class="keyword">public</span> <a class="code" href="structfaiss_1_1Index.html">faiss::Index</a> {</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html">GpuIndex</a>(<a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">GpuResources</a>* resources,</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordtype">int</span> device,</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordtype">int</span> dims,</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a> metric);</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">inline</span> <span class="keywordtype">int</span> getDevice()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a27b56209183310c8d57ffda796f02c6c">device_</a>;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  }</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">GpuResources</a>* getResources() {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a17b82a8a11783da6eb1b07c9aab98c36">resources_</a>;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  }</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> /// `x` can be resident on the CPU or any GPU; copies are performed</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> /// as needed</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> /// Handles paged adds if the add set is too large; calls addInternal_</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a2a7226973e6325014da1ef5d00eaebba">add</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a>, <span class="keyword">const</span> <span class="keywordtype">float</span>* x);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"></span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> /// `x` and `ids` can be resident on the CPU or any GPU; copies are</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> /// performed as needed</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> /// Handles paged adds if the add set is too large; calls addInternal_</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#af5d3422defd473dc848ee10595be41f2">add_with_ids</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* ids);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> /// `x`, `distances` and `labels` can be resident on the CPU or any</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> /// GPU; copies are performed as needed</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a9ed0703c30e6634eba082c0841c4119c">search</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> n,</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> k,</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">float</span>* distances,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a>* labels) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">protected</span>:<span class="comment"></span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /// Handles paged adds if the add set is too large, passes to</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// addImpl_ to actually perform the add for the current page</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2">addInternal_</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* ids);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> /// Overridden to actually perform the add</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f">addImpl_</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> n,</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a>* ids) = 0;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> /// Overridden to actually perform the search</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04">searchImpl_</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> n,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> k,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">float</span>* distances,</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a>* labels) <span class="keyword">const</span> = 0;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">protected</span>:<span class="comment"></span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> /// Manages streans, cuBLAS handles and scratch memory for devices</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#a17b82a8a11783da6eb1b07c9aab98c36"> 77</a></span> <span class="comment"></span> <a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">GpuResources</a>* <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a17b82a8a11783da6eb1b07c9aab98c36">resources_</a>;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> /// The GPU device we are resident on</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1GpuIndex.html#a27b56209183310c8d57ffda796f02c6c"> 80</a></span> <span class="comment"></span> <span class="keywordtype">int</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndex.html#a27b56209183310c8d57ffda796f02c6c">device_</a>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> };</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> } } <span class="comment">// namespace</span></div>
<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>
<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#l00049">GpuIndex.cu:49</a></div></div>
<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#l00024">GpuResources.h:24</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html">faiss::gpu::GpuIndex</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8h_source.html#l00020">GpuIndex.h:20</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a27b56209183310c8d57ffda796f02c6c"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a27b56209183310c8d57ffda796f02c6c">faiss::gpu::GpuIndex::device_</a></div><div class="ttdeci">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#l00080">GpuIndex.h:80</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a17b82a8a11783da6eb1b07c9aab98c36"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a17b82a8a11783da6eb1b07c9aab98c36">faiss::gpu::GpuIndex::resources_</a></div><div class="ttdeci">GpuResources * resources_</div><div class="ttdoc">Manages streans, cuBLAS handles and scratch memory for devices. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8h_source.html#l00077">GpuIndex.h:77</a></div></div>
<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#l00064">Index.h:64</a></div></div>
<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>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a2a7226973e6325014da1ef5d00eaebba"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a2a7226973e6325014da1ef5d00eaebba">faiss::gpu::GpuIndex::add</a></div><div class="ttdeci">virtual void add(faiss::Index::idx_t, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00037">GpuIndex.cu:37</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_af5d3422defd473dc848ee10595be41f2"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#af5d3422defd473dc848ee10595be41f2">faiss::gpu::GpuIndex::add_with_ids</a></div><div class="ttdeci">virtual void add_with_ids(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#l00042">GpuIndex.cu:42</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndex_html_a9ed0703c30e6634eba082c0841c4119c"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndex.html#a9ed0703c30e6634eba082c0841c4119c">faiss::gpu::GpuIndex::search</a></div><div class="ttdeci">virtual void search(faiss::Index::idx_t n, const float *x, faiss::Index::idx_t k, float *distances, faiss::Index::idx_t *labels) const </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8cu_source.html#l00080">GpuIndex.cu:80</a></div></div>
<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#l00061">Index.h:61</a></div></div>
<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#l00044">Index.h:44</a></div></div>
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