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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
279 lines
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279 lines
28 KiB
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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_498271007b03b2a0521055e88776887b.html">utils</a></li> </ul>
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<div class="title">DeviceUtils.cpp</div> </div>
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</div><!--header-->
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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"> * 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 "DeviceUtils.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "../../FaissAssert.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <mutex></span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <unordered_map></span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keywordtype">int</span> getCurrentDevice() {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordtype">int</span> dev = -1;</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  CUDA_VERIFY(cudaGetDevice(&dev));</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  FAISS_ASSERT(dev != -1);</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="keywordflow">return</span> dev;</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> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keywordtype">void</span> setCurrentDevice(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  CUDA_VERIFY(cudaSetDevice(device));</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> </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keywordtype">int</span> getNumDevices() {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordtype">int</span> numDev = -1;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  CUDA_VERIFY(cudaGetDeviceCount(&numDev));</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  FAISS_ASSERT(numDev != -1);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">return</span> numDev;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> }</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keywordtype">void</span> synchronizeAllDevices() {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < getNumDevices(); ++i) {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  DeviceScope scope(i);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  CUDA_VERIFY(cudaDeviceSynchronize());</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> }</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> <span class="keyword">const</span> cudaDeviceProp& getDeviceProperties(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">static</span> std::mutex mutex;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">static</span> std::unordered_map<int, cudaDeviceProp> properties;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  std::lock_guard<std::mutex> guard(mutex);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">auto</span> it = properties.find(device);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (it == properties.end()) {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  cudaDeviceProp prop;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  CUDA_VERIFY(cudaGetDeviceProperties(&prop, device));</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>  properties[device] = prop;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  it = properties.find(device);</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> it->second;</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="keyword">const</span> cudaDeviceProp& getCurrentDeviceProperties() {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> getDeviceProperties(getCurrentDevice());</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> </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keywordtype">int</span> getMaxThreads(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> getDeviceProperties(device).maxThreadsPerBlock;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">int</span> getMaxThreadsCurrentDevice() {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> getMaxThreads(getCurrentDevice());</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> </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">size_t</span> getMaxSharedMemPerBlock(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> getDeviceProperties(device).sharedMemPerBlock;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> }</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keywordtype">size_t</span> getMaxSharedMemPerBlockCurrentDevice() {</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> getMaxSharedMemPerBlock(getCurrentDevice());</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> </div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="keywordtype">int</span> getDeviceForAddress(<span class="keyword">const</span> <span class="keywordtype">void</span>* p) {</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">if</span> (!p) {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">return</span> -1;</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> </div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  cudaPointerAttributes att;</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  cudaError_t err = cudaPointerGetAttributes(&att, p);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  FAISS_ASSERT(err == cudaSuccess ||</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  err == cudaErrorInvalidValue);</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (err == cudaErrorInvalidValue) {</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// Make sure the current thread error status has been reset</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  err = cudaGetLastError();</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  FAISS_ASSERT(err == cudaErrorInvalidValue);</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (att.memoryType == cudaMemoryTypeHost) {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> att.device;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> }</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keywordtype">bool</span> getFullUnifiedMemSupport(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& prop = getDeviceProperties(device);</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> (prop.major >= 6);</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> }</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="keywordtype">bool</span> getFullUnifiedMemSupportCurrentDevice() {</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> getFullUnifiedMemSupport(getCurrentDevice());</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> </div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> DeviceScope::DeviceScope(<span class="keywordtype">int</span> device) {</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  prevDevice_ = getCurrentDevice();</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="keywordflow">if</span> (prevDevice_ != device) {</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  setCurrentDevice(device);</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  prevDevice_ = -1;</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> }</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> DeviceScope::~DeviceScope() {</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> (prevDevice_ != -1) {</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  setCurrentDevice(prevDevice_);</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> }</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> CublasHandleScope::CublasHandleScope() {</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">auto</span> blasStatus = cublasCreate(&blasHandle_);</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  FAISS_ASSERT(blasStatus == CUBLAS_STATUS_SUCCESS);</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> CublasHandleScope::~CublasHandleScope() {</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">auto</span> blasStatus = cublasDestroy(blasHandle_);</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  FAISS_ASSERT(blasStatus == CUBLAS_STATUS_SUCCESS);</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
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<div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1CudaEvent.html#af7f5fa36dbff9e6126c1b01218f147e1"> 141</a></span> <a class="code" href="classfaiss_1_1gpu_1_1CudaEvent.html#af7f5fa36dbff9e6126c1b01218f147e1">CudaEvent::CudaEvent</a>(cudaStream_t stream)</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  : event_(0) {</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  CUDA_VERIFY(cudaEventCreateWithFlags(&event_, cudaEventDisableTiming));</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  CUDA_VERIFY(cudaEventRecord(event_, stream));</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <a class="code" href="classfaiss_1_1gpu_1_1CudaEvent.html#af7f5fa36dbff9e6126c1b01218f147e1">CudaEvent::CudaEvent</a>(<a class="code" href="classfaiss_1_1gpu_1_1CudaEvent.html">CudaEvent</a>&& event) noexcept</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  : event_(std::move(event.event_)) {</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">event</span>.event_ = 0;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> }</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> CudaEvent::~CudaEvent() {</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span> (event_) {</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  CUDA_VERIFY(cudaEventDestroy(event_));</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> }</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> CudaEvent&</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> CudaEvent::operator=(CudaEvent&& event) noexcept {</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  event_ = std::move(event.event_);</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">event</span>.event_ = 0;</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> }</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1CudaEvent.html#ad8968b298b95788c7679d7e5aa0571eb"> 167</a></span> <a class="code" href="classfaiss_1_1gpu_1_1CudaEvent.html#ad8968b298b95788c7679d7e5aa0571eb">CudaEvent::streamWaitOnEvent</a>(cudaStream_t stream) {</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  CUDA_VERIFY(cudaStreamWaitEvent(stream, event_, 0));</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> }</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00172"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1CudaEvent.html#a9c85540093aaf87de80ece9f854e7c57"> 172</a></span> <a class="code" href="classfaiss_1_1gpu_1_1CudaEvent.html#a9c85540093aaf87de80ece9f854e7c57">CudaEvent::cpuWaitOnEvent</a>() {</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  CUDA_VERIFY(cudaEventSynchronize(event_));</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> }</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> } } <span class="comment">// namespace</span></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CudaEvent_html_a9c85540093aaf87de80ece9f854e7c57"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CudaEvent.html#a9c85540093aaf87de80ece9f854e7c57">faiss::gpu::CudaEvent::cpuWaitOnEvent</a></div><div class="ttdeci">void cpuWaitOnEvent()</div><div class="ttdoc">Have the CPU wait for the completion of this event. </div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8cpp_source.html#l00172">DeviceUtils.cpp:172</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CudaEvent_html_ad8968b298b95788c7679d7e5aa0571eb"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CudaEvent.html#ad8968b298b95788c7679d7e5aa0571eb">faiss::gpu::CudaEvent::streamWaitOnEvent</a></div><div class="ttdeci">void streamWaitOnEvent(cudaStream_t stream)</div><div class="ttdoc">Wait on this event in this stream. </div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8cpp_source.html#l00167">DeviceUtils.cpp:167</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CudaEvent_html_af7f5fa36dbff9e6126c1b01218f147e1"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CudaEvent.html#af7f5fa36dbff9e6126c1b01218f147e1">faiss::gpu::CudaEvent::CudaEvent</a></div><div class="ttdeci">CudaEvent(cudaStream_t stream)</div><div class="ttdoc">Creates an event and records it in this stream. </div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8cpp_source.html#l00141">DeviceUtils.cpp:141</a></div></div>
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<div class="ttc" id="classfaiss_1_1gpu_1_1CudaEvent_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CudaEvent.html">faiss::gpu::CudaEvent</a></div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8h_source.html#l00087">DeviceUtils.h:87</a></div></div>
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