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<div class="title">Distance.cu</div> </div>
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<div class="contents">
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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">/**</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * All rights reserved.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
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<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>
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<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>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "Distance.cuh"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "BroadcastSum.cuh"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "L2Norm.cuh"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "L2Select.cuh"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "../../FaissAssert.h"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "../GpuResources.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "../utils/DeviceUtils.h"</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "../utils/Limits.cuh"</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "../utils/MatrixMult.cuh"</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "../utils/BlockSelectKernel.cuh"</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <memory></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <thrust/fill.h></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <thrust/for_each.h></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <thrust/device_ptr.h></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <thrust/execution_policy.h></span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</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> constexpr <span class="keywordtype">int</span> kDefaultTileSize = 256;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">void</span> runL2Distance(GpuResources* resources,</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  Tensor<T, 2, true>& centroids,</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  Tensor<T, 1, true>* centroidNorms,</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  Tensor<T, 2, true>& queries,</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">int</span> k,</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  Tensor<T, 2, true>& outDistances,</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  Tensor<int, 2, true>& outIndices,</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">bool</span> ignoreOutDistances = <span class="keyword">false</span>,</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">int</span> tileSize = -1) {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  FAISS_ASSERT(outDistances.getSize(0) == queries.getSize(0));</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  FAISS_ASSERT(outIndices.getSize(0) == queries.getSize(0));</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  FAISS_ASSERT(outDistances.getSize(1) == k);</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  FAISS_ASSERT(outIndices.getSize(1) == k);</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">auto</span>& mem = resources->getMemoryManagerCurrentDevice();</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">auto</span> defaultStream = resources->getDefaultStreamCurrentDevice();</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// If we're quering against a 0 sized set, just return empty results</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">if</span> (centroids.numElements() == 0) {</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  thrust::fill(thrust::cuda::par.on(defaultStream),</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  outDistances.data(), outDistances.end(),</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  Limits<T>::getMax());</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  thrust::fill(thrust::cuda::par.on(defaultStream),</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  outIndices.data(), outIndices.end(),</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  -1);</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// If ||c||^2 is not pre-computed, calculate it</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  DeviceTensor<T, 1, true> cNorms;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">if</span> (!centroidNorms) {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  cNorms = std::move(DeviceTensor<T, 1, true>(</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  mem,</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {centroids.getSize(0)}, defaultStream));</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  runL2Norm(centroids, cNorms, <span class="keyword">true</span>, defaultStream);</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  centroidNorms = &cNorms;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// Prepare norm vector ||q||^2; ||c||^2 is already pre-computed</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="keywordtype">int</span> qNormSize[1] = {queries.getSize(0)};</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  DeviceTensor<T, 1, true> queryNorms(mem, qNormSize, defaultStream);</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="comment">// ||q||^2</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  runL2Norm(queries, queryNorms, <span class="keyword">true</span>, defaultStream);</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="comment">//</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// Handle the problem in row tiles, to avoid excessive temporary</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// memory requests</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">//</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>  FAISS_ASSERT(k <= centroids.getSize(0));</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  FAISS_ASSERT(k <= 1024); <span class="comment">// select limitation</span></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="comment">// To allocate all of (#queries, #centroids) is potentially too much</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// memory. Limit our total size requested</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">size_t</span> distanceRowSize = centroids.getSize(0) * <span class="keyword">sizeof</span>(T);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// FIXME: parameterize based on # of centroids and DeviceMemory</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">int</span> defaultTileSize = <span class="keyword">sizeof</span>(T) < 4 ? kDefaultTileSize * 2 : kDefaultTileSize;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  tileSize = tileSize <= 0 ? defaultTileSize : tileSize;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">int</span> maxQueriesPerIteration = std::min(tileSize, queries.getSize(0));</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="comment">// Temporary output memory space we'll use</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  DeviceTensor<T, 2, true> distanceBuf1(</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  mem, {maxQueriesPerIteration, centroids.getSize(0)}, defaultStream);</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  DeviceTensor<T, 2, true> distanceBuf2(</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  mem, {maxQueriesPerIteration, centroids.getSize(0)}, defaultStream);</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  DeviceTensor<T, 2, true>* distanceBufs[2] =</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  {&distanceBuf1, &distanceBuf2};</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">auto</span> streams = resources->getAlternateStreamsCurrentDevice();</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  streamWait(streams, {defaultStream});</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">int</span> curStream = 0;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < queries.getSize(0); i += maxQueriesPerIteration) {</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">int</span> numQueriesForIteration = std::min(maxQueriesPerIteration,</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  queries.getSize(0) - i);</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">auto</span> distanceBufView =</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  distanceBufs[curStream]->narrowOutermost(0, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">auto</span> queryView =</div>
|
|
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  queries.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">auto</span> outDistanceView =</div>
|
|
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  outDistances.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">auto</span> outIndexView =</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  outIndices.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">auto</span> queryNormNiew =</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  queryNorms.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div>
|
|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">// L2 distance is ||c||^2 - 2qc + ||q||^2</span></div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div>
|
|
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// -2qc</span></div>
|
|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// (query id x dim) x (centroid id, dim)' = (query id, centroid id)</span></div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  runMatrixMult(distanceBufView, <span class="keyword">false</span>,</div>
|
|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  queryView, <span class="keyword">false</span>,</div>
|
|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  centroids, <span class="keyword">true</span>,</div>
|
|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  -2.0f, 0.0f,</div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  resources->getBlasHandleCurrentDevice(),</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  streams[curStream]);</div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// For L2 distance, we use this fused kernel that performs both</span></div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment">// adding ||c||^2 to -2qc and k-selection, so we only need two</span></div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// passes (one write by the gemm, one read here) over the huge</span></div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// region of output memory</span></div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  runL2SelectMin(distanceBufView,</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  *centroidNorms,</div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  outDistanceView,</div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  outIndexView,</div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  k,</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  streams[curStream]);</div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (!ignoreOutDistances) {</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// expand (query id) to (query id, k) by duplicating along rows</span></div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// top-k ||c||^2 - 2qc + ||q||^2 in the form (query id, k)</span></div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  runSumAlongRows(queryNormNiew, outDistanceView, streams[curStream]);</div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  curStream = (curStream + 1) % 2;</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// Have the desired ordering stream wait on the multi-stream</span></div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  streamWait({defaultStream}, streams);</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="keywordtype">void</span> runIPDistance(GpuResources* resources,</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  Tensor<T, 2, true>& centroids,</div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  Tensor<T, 2, true>& queries,</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">int</span> k,</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  Tensor<T, 2, true>& outDistances,</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  Tensor<int, 2, true>& outIndices,</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">int</span> tileSize = -1) {</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  FAISS_ASSERT(outDistances.getSize(0) == queries.getSize(0));</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  FAISS_ASSERT(outIndices.getSize(0) == queries.getSize(0));</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  FAISS_ASSERT(outDistances.getSize(1) == k);</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  FAISS_ASSERT(outIndices.getSize(1) == k);</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">auto</span>& mem = resources->getMemoryManagerCurrentDevice();</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">auto</span> defaultStream = resources->getDefaultStreamCurrentDevice();</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// If we're quering against a 0 sized set, just return empty results</span></div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (centroids.numElements() == 0) {</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  thrust::fill(thrust::cuda::par.on(defaultStream),</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  outDistances.data(), outDistances.end(),</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  Limits<T>::getMax());</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  thrust::fill(thrust::cuda::par.on(defaultStream),</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  outIndices.data(), outIndices.end(),</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  -1);</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// Handle the problem in row tiles, to avoid excessive temporary</span></div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// memory requests</span></div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  FAISS_ASSERT(k <= centroids.getSize(0));</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  FAISS_ASSERT(k <= 1024); <span class="comment">// select limitation</span></div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">// To allocate all of (#queries, #centroids) is potentially too much</span></div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// memory. Limit our total size requested</span></div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">size_t</span> distanceRowSize = centroids.getSize(0) * <span class="keyword">sizeof</span>(T);</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="comment">// FIXME: parameterize based on # of centroids and DeviceMemory</span></div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordtype">int</span> defaultTileSize = <span class="keyword">sizeof</span>(T) < 4 ? kDefaultTileSize * 2 : kDefaultTileSize;</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  tileSize = tileSize <= 0 ? defaultTileSize : tileSize;</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordtype">int</span> maxQueriesPerIteration = std::min(tileSize, queries.getSize(0));</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// Temporary output memory space we'll use</span></div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  DeviceTensor<T, 2, true> distanceBuf1(</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  mem, {maxQueriesPerIteration, centroids.getSize(0)}, defaultStream);</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  DeviceTensor<T, 2, true> distanceBuf2(</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  mem, {maxQueriesPerIteration, centroids.getSize(0)}, defaultStream);</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  DeviceTensor<T, 2, true>* distanceBufs[2] =</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  {&distanceBuf1, &distanceBuf2};</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">auto</span> streams = resources->getAlternateStreamsCurrentDevice();</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  streamWait(streams, {defaultStream});</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordtype">int</span> curStream = 0;</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < queries.getSize(0); i += maxQueriesPerIteration) {</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordtype">int</span> numQueriesForIteration = std::min(maxQueriesPerIteration,</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  queries.getSize(0) - i);</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">auto</span> distanceBufView =</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  distanceBufs[curStream]->narrowOutermost(0, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keyword">auto</span> queryView =</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  queries.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keyword">auto</span> outDistanceView =</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  outDistances.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">auto</span> outIndexView =</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  outIndices.narrowOutermost(i, numQueriesForIteration);</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">// (query id x dim) x (centroid id, dim)' = (query id, centroid id)</span></div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  runMatrixMult(distanceBufView, <span class="keyword">false</span>,</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  queryView, <span class="keyword">false</span>, centroids, <span class="keyword">true</span>,</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  1.0f, 0.0f,</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  resources->getBlasHandleCurrentDevice(),</div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  streams[curStream]);</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// top-k of dot products</span></div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="comment">// (query id, top k centroids)</span></div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  runBlockSelect(distanceBufView,</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  outDistanceView,</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  outIndexView,</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keyword">true</span>, k, streams[curStream]);</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  curStream = (curStream + 1) % 2;</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  streamWait({defaultStream}, streams);</div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> }</div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// Instantiations of the distance templates</span></div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="keywordtype">void</span></div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> runIPDistance(GpuResources* resources,</div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  Tensor<float, 2, true>& vectors,</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  Tensor<float, 2, true>& queries,</div>
|
|
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordtype">int</span> k,</div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  Tensor<float, 2, true>& outDistances,</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  Tensor<int, 2, true>& outIndices,</div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordtype">int</span> tileSize) {</div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  runIPDistance<float>(resources,</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  vectors,</div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  queries,</div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  k,</div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  outDistances,</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  outIndices,</div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  tileSize);</div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> }</div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="preprocessor"></span><span class="keywordtype">void</span></div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> runIPDistance(GpuResources* resources,</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  Tensor<half, 2, true>& vectors,</div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  Tensor<half, 2, true>& queries,</div>
|
|
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordtype">int</span> k,</div>
|
|
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  Tensor<half, 2, true>& outDistances,</div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  Tensor<int, 2, true>& outIndices,</div>
|
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordtype">int</span> tileSize) {</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  runIPDistance<half>(resources,</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  vectors,</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  queries,</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  k,</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  outDistances,</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  outIndices,</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  tileSize);</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> }</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> runL2Distance(GpuResources* resources,</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  Tensor<float, 2, true>& vectors,</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  Tensor<float, 1, true>* vectorNorms,</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  Tensor<float, 2, true>& queries,</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordtype">int</span> k,</div>
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|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  Tensor<float, 2, true>& outDistances,</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  Tensor<int, 2, true>& outIndices,</div>
|
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordtype">bool</span> ignoreOutDistances,</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordtype">int</span> tileSize) {</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  runL2Distance<float>(resources,</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  vectors,</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  vectorNorms,</div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  queries,</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  k,</div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  outDistances,</div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  outIndices,</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  ignoreOutDistances,</div>
|
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  tileSize);</div>
|
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> }</div>
|
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="preprocessor"></span><span class="keywordtype">void</span></div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> runL2Distance(GpuResources* resources,</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  Tensor<half, 2, true>& vectors,</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  Tensor<half, 1, true>* vectorNorms,</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  Tensor<half, 2, true>& queries,</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordtype">int</span> k,</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  Tensor<half, 2, true>& outDistances,</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  Tensor<int, 2, true>& outIndices,</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordtype">bool</span> ignoreOutDistances,</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordtype">int</span> tileSize) {</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  runL2Distance<half>(resources,</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  vectors,</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  vectorNorms,</div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  queries,</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  k,</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  outDistances,</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  outIndices,</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  ignoreOutDistances,</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  tileSize);</div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> }</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="preprocessor"></span></div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> } } <span class="comment">// namespace</span></div>
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|
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