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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
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262 lines
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<li class="navelem"><a class="el" href="dir_6b3ae6988449b0834e9596fad5d75199.html">gpu</a></li><li class="navelem"><a class="el" href="dir_02dc1cf4df13911cc8cfd20f07047b71.html">perf</a></li> </ul>
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<div class="title">CompareFlat.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 "../../IndexFlat.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "../../utils.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "../GpuIndexFlat.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "IndexWrapper.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "../test/TestUtils.h"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "../utils/DeviceTensor.cuh"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "../utils/DeviceUtils.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "../utils/HostTensor.cuh"</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "../utils/Timer.h"</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <gflags/gflags.h></span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <map></span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <memory></span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <cuda_profiler_api.h></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> DEFINE_int32(k, 3, <span class="stringliteral">"final number of closest results returned"</span>);</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> DEFINE_int32(num, 128, <span class="stringliteral">"# of vecs"</span>);</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> DEFINE_int32(dim, 128, <span class="stringliteral">"# of dimensions"</span>);</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> DEFINE_int32(num_queries, 3, <span class="stringliteral">"number of query vectors"</span>);</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> DEFINE_bool(diff, <span class="keyword">true</span>, <span class="stringliteral">"show exact distance + index output discrepancies"</span>);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> DEFINE_bool(use_float16, <span class="keyword">false</span>, <span class="stringliteral">"use encodings in float16"</span>);</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> DEFINE_bool(use_float16_math, <span class="keyword">false</span>, <span class="stringliteral">"perform math in float16"</span>);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> DEFINE_bool(transposed, <span class="keyword">false</span>, <span class="stringliteral">"store vectors transposed"</span>);</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> DEFINE_int64(seed, -1, <span class="stringliteral">"specify random seed"</span>);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> DEFINE_int32(num_gpus, 1, <span class="stringliteral">"number of gpus to use"</span>);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> DEFINE_int64(pinned_mem, 0, <span class="stringliteral">"pinned memory allocation to use"</span>);</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> DEFINE_bool(cpu, <span class="keyword">true</span>, <span class="stringliteral">"run the CPU code for timing and comparison"</span>);</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> DEFINE_bool(use_unified_mem, <span class="keyword">false</span>, <span class="stringliteral">"use Pascal unified memory for the index"</span>);</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">using namespace </span>faiss::gpu;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>** argv) {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  gflags::ParseCommandLineFlags(&argc, &argv, <span class="keyword">true</span>);</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  cudaProfilerStop();</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> seed = FLAGS_seed != -1L ? FLAGS_seed : time(<span class="keyword">nullptr</span>);</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  printf(<span class="stringliteral">"using seed %ld\n"</span>, seed);</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="keyword">auto</span> numQueries = FLAGS_num_queries;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">auto</span> index = std::unique_ptr<faiss::IndexFlatL2>(</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexFlatL2.html">faiss::IndexFlatL2</a>(FLAGS_dim));</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">HostTensor<float, 2, true></a> vecs({FLAGS_num, FLAGS_dim});</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  faiss::float_rand(vecs.data(), vecs.numElements(), seed);</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>  index->add(FLAGS_num, vecs.data());</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>  printf(<span class="stringliteral">"Database: dim %d num vecs %d\n"</span>, FLAGS_dim, FLAGS_num);</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  printf(<span class="stringliteral">"L2 lookup: %d queries, total k %d\n"</span>,</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  numQueries, FLAGS_k);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  printf(<span class="stringliteral">"float16 encoding %s\n"</span>, FLAGS_use_float16 ? <span class="stringliteral">"enabled"</span> : <span class="stringliteral">"disabled"</span>);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  printf(<span class="stringliteral">"transposed storage %s\n"</span>, FLAGS_transposed ? <span class="stringliteral">"enabled"</span> : <span class="stringliteral">"disabled"</span>);</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Convert to GPU index</span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  printf(<span class="stringliteral">"Copying index to %d GPU(s)...\n"</span>, FLAGS_num_gpus);</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">auto</span> initFn = [&index](<a class="code" href="classfaiss_1_1gpu_1_1GpuResources.html">faiss::gpu::GpuResources</a>* res, <span class="keywordtype">int</span> dev) -></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  std::unique_ptr<faiss::gpu::GpuIndexFlatL2> {</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  ((<a class="code" href="classfaiss_1_1gpu_1_1StandardGpuResources.html">faiss::gpu::StandardGpuResources</a>*) res)->setPinnedMemory(</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  FLAGS_pinned_mem);</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html">GpuIndexFlatConfig</a> config;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  config.<a class="code" href="structfaiss_1_1gpu_1_1GpuIndexConfig.html#aab05a0aa7b42feae7df4e556a52ead57">device</a> = dev;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  config.<a class="code" href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#afd694186c87751937a646f3db2c8ba3d">useFloat16</a> = FLAGS_use_float16;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  config.<a class="code" href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#a5a2d8737f4277e55fc1a99ef4fc4c630">useFloat16Accumulator</a> = FLAGS_use_float16_math;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  config.<a class="code" href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#a0342a26f5e59563bfe04f3f80e3b27f0">storeTransposed</a> = FLAGS_transposed;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  config.<a class="code" href="structfaiss_1_1gpu_1_1GpuIndexConfig.html#adf7c9461009108a9a433a077ab322d2e">memorySpace</a> = FLAGS_use_unified_mem ?</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  MemorySpace::Unified : MemorySpace::Device;</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="keyword">auto</span> p = std::unique_ptr<faiss::gpu::GpuIndexFlatL2>(</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">new</span> <a class="code" href="classfaiss_1_1gpu_1_1GpuIndexFlatL2.html">faiss::gpu::GpuIndexFlatL2</a>(res, index.get(), config));</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> p;</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</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>  <a class="code" href="structfaiss_1_1gpu_1_1IndexWrapper.html">IndexWrapper<faiss::gpu::GpuIndexFlatL2></a> gpuIndex(FLAGS_num_gpus, initFn);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  printf(<span class="stringliteral">"copy done\n"</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">// Build query vectors</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">HostTensor<float, 2, true></a> cpuQuery({numQueries, FLAGS_dim});</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  faiss::float_rand(cpuQuery.data(), cpuQuery.numElements(), seed);</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">// Time faiss CPU</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">HostTensor<float, 2, true></a> cpuDistances({numQueries, FLAGS_k});</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_1HostTensor.html">HostTensor<faiss::Index::idx_t, 2, true></a> cpuIndices({numQueries, FLAGS_k});</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="keywordflow">if</span> (FLAGS_cpu) {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">float</span> cpuTime = 0.0f;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</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_1CpuTimer.html">CpuTimer</a> timer;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  index->search(numQueries,</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  cpuQuery.data(),</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  FLAGS_k,</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  cpuDistances.data(),</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  cpuIndices.data());</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>  cpuTime = timer.<a class="code" href="classfaiss_1_1gpu_1_1CpuTimer.html#a4a2795debf10bc7eb904d62356e41f0d">elapsedMilliseconds</a>();</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  printf(<span class="stringliteral">"CPU time %.3f ms\n"</span>, cpuTime);</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> </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_1HostTensor.html">HostTensor<float, 2, true></a> gpuDistances({numQueries, FLAGS_k});</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">HostTensor<faiss::Index::idx_t, 2, true></a> gpuIndices({numQueries, FLAGS_k});</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  CUDA_VERIFY(cudaProfilerStart());</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  faiss::gpu::synchronizeAllDevices();</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordtype">float</span> gpuTime = 0.0f;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">// Time GPU</span></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  {</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="classfaiss_1_1gpu_1_1CpuTimer.html">CpuTimer</a> timer;</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  gpuIndex.getIndex()->search(cpuQuery.getSize(0),</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  cpuQuery.data(),</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  FLAGS_k,</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  gpuDistances.data(),</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  gpuIndices.data());</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// There is a device -> host copy above, so no need to time</span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// additional synchronization with the GPU</span></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  gpuTime = timer.<a class="code" href="classfaiss_1_1gpu_1_1CpuTimer.html#a4a2795debf10bc7eb904d62356e41f0d">elapsedMilliseconds</a>();</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  CUDA_VERIFY(cudaProfilerStop());</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  printf(<span class="stringliteral">"GPU time %.3f ms\n"</span>, gpuTime);</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (FLAGS_cpu) {</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  compareLists(cpuDistances.data(), cpuIndices.data(),</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  gpuDistances.data(), gpuIndices.data(),</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  numQueries, FLAGS_k,</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="stringliteral">""</span>, <span class="keyword">true</span>, FLAGS_diff, <span class="keyword">false</span>);</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>  CUDA_VERIFY(cudaDeviceSynchronize());</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="keywordflow">return</span> 0;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> }</div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CpuTimer_html_a4a2795debf10bc7eb904d62356e41f0d"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CpuTimer.html#a4a2795debf10bc7eb904d62356e41f0d">faiss::gpu::CpuTimer::elapsedMilliseconds</a></div><div class="ttdeci">float elapsedMilliseconds()</div><div class="ttdoc">Returns elapsed time in milliseconds. </div><div class="ttdef"><b>Definition:</b> <a href="Timer_8cpp_source.html#l00052">Timer.cpp:52</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexFlatConfig_html_a5a2d8737f4277e55fc1a99ef4fc4c630"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#a5a2d8737f4277e55fc1a99ef4fc4c630">faiss::gpu::GpuIndexFlatConfig::useFloat16Accumulator</a></div><div class="ttdeci">bool useFloat16Accumulator</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexFlat_8h_source.html#l00040">GpuIndexFlat.h:40</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexFlatConfig_html_a0342a26f5e59563bfe04f3f80e3b27f0"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#a0342a26f5e59563bfe04f3f80e3b27f0">faiss::gpu::GpuIndexFlatConfig::storeTransposed</a></div><div class="ttdeci">bool storeTransposed</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexFlat_8h_source.html#l00048">GpuIndexFlat.h:48</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexFlatL2_html"><div class="ttname"><a href="structfaiss_1_1IndexFlatL2.html">faiss::IndexFlatL2</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00079">IndexFlat.h:79</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuResources_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuResources.html">faiss::gpu::GpuResources</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuResources_8h_source.html#l00023">GpuResources.h:23</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CpuTimer_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CpuTimer.html">faiss::gpu::CpuTimer</a></div><div class="ttdoc">CPU wallclock elapsed timer. </div><div class="ttdef"><b>Definition:</b> <a href="Timer_8h_source.html#l00042">Timer.h:42</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexFlatConfig_html_afd694186c87751937a646f3db2c8ba3d"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html#afd694186c87751937a646f3db2c8ba3d">faiss::gpu::GpuIndexFlatConfig::useFloat16</a></div><div class="ttdeci">bool useFloat16</div><div class="ttdoc">Whether or not data is stored as float16. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexFlat_8h_source.html#l00035">GpuIndexFlat.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexConfig_html_aab05a0aa7b42feae7df4e556a52ead57"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexConfig.html#aab05a0aa7b42feae7df4e556a52ead57">faiss::gpu::GpuIndexConfig::device</a></div><div class="ttdeci">int device</div><div class="ttdoc">GPU device on which the index is resident. </div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8h_source.html#l00027">GpuIndex.h:27</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexFlatConfig_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexFlatConfig.html">faiss::gpu::GpuIndexFlatConfig</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexFlat_8h_source.html#l00027">GpuIndexFlat.h:27</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1GpuIndexConfig_html_adf7c9461009108a9a433a077ab322d2e"><div class="ttname"><a href="structfaiss_1_1gpu_1_1GpuIndexConfig.html#adf7c9461009108a9a433a077ab322d2e">faiss::gpu::GpuIndexConfig::memorySpace</a></div><div class="ttdeci">MemorySpace memorySpace</div><div class="ttdef"><b>Definition:</b> <a href="GpuIndex_8h_source.html#l00032">GpuIndex.h:32</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1StandardGpuResources_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StandardGpuResources.html">faiss::gpu::StandardGpuResources</a></div><div class="ttdef"><b>Definition:</b> <a href="StandardGpuResources_8h_source.html#l00023">StandardGpuResources.h:23</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1GpuIndexFlatL2_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1GpuIndexFlatL2.html">faiss::gpu::GpuIndexFlatL2</a></div><div class="ttdef"><b>Definition:</b> <a href="GpuIndexFlat_8h_source.html#l00169">GpuIndexFlat.h:169</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1HostTensor_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1HostTensor.html">faiss::gpu::HostTensor</a></div><div class="ttdef"><b>Definition:</b> <a href="HostTensor_8cuh_source.html#l00022">HostTensor.cuh:22</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1IndexWrapper_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1IndexWrapper.html">faiss::gpu::IndexWrapper</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexWrapper_8h_source.html#l00025">IndexWrapper.h:25</a></div></div>
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