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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">Timer.cpp</div> </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<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>
<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>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "Timer.h"</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "DeviceUtils.h"</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "../../FaissAssert.h"</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1KernelTimer.html#af533a5a8734243263032960c2445d233"> 17</a></span> <a class="code" href="classfaiss_1_1gpu_1_1KernelTimer.html#af533a5a8734243263032960c2445d233">KernelTimer::KernelTimer</a>(cudaStream_t stream)</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  : startEvent_(0),</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  stopEvent_(0),</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  stream_(stream),</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  valid_(true) {</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  CUDA_VERIFY(cudaEventCreate(&startEvent_));</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  CUDA_VERIFY(cudaEventCreate(&stopEvent_));</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  CUDA_VERIFY(cudaEventRecord(startEvent_, stream_));</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1KernelTimer.html#af9883350bf0732b2452f1ce4670266fa"> 28</a></span> <a class="code" href="classfaiss_1_1gpu_1_1KernelTimer.html#af9883350bf0732b2452f1ce4670266fa">KernelTimer::~KernelTimer</a>() {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  CUDA_VERIFY(cudaEventDestroy(startEvent_));</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  CUDA_VERIFY(cudaEventDestroy(stopEvent_));</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> }</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keywordtype">float</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1KernelTimer.html#ac79ab2b2ef60a3fb713f7c80380ad2b5"> 34</a></span> <a class="code" href="classfaiss_1_1gpu_1_1KernelTimer.html#ac79ab2b2ef60a3fb713f7c80380ad2b5">KernelTimer::elapsedMilliseconds</a>() {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  FAISS_ASSERT(valid_);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  CUDA_VERIFY(cudaEventRecord(stopEvent_, stream_));</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  CUDA_VERIFY(cudaEventSynchronize(stopEvent_));</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">auto</span> time = 0.0f;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  CUDA_VERIFY(cudaEventElapsedTime(&time, startEvent_, stopEvent_));</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  valid_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> time;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1CpuTimer.html#af2f8e832b4c5425e152834ae7aa2af49"> 47</a></span> <a class="code" href="classfaiss_1_1gpu_1_1CpuTimer.html#af2f8e832b4c5425e152834ae7aa2af49">CpuTimer::CpuTimer</a>() {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  clock_gettime(CLOCK_REALTIME, &start_);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keywordtype">float</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1CpuTimer.html#a4a2795debf10bc7eb904d62356e41f0d"> 52</a></span> <a class="code" href="classfaiss_1_1gpu_1_1CpuTimer.html#a4a2795debf10bc7eb904d62356e41f0d">CpuTimer::elapsedMilliseconds</a>() {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">struct </span>timespec end;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  clock_gettime(CLOCK_REALTIME, &end);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">auto</span> diffS = end.tv_sec - start_.tv_sec;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">auto</span> diffNs = end.tv_nsec - start_.tv_nsec;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">return</span> 1000.0f * (float) diffS + ((<span class="keywordtype">float</span>) diffNs) / 1000000.0f;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> } } <span class="comment">// namespace</span></div>
<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>
<div class="ttc" id="classfaiss_1_1gpu_1_1KernelTimer_html_af533a5a8734243263032960c2445d233"><div class="ttname"><a href="classfaiss_1_1gpu_1_1KernelTimer.html#af533a5a8734243263032960c2445d233">faiss::gpu::KernelTimer::KernelTimer</a></div><div class="ttdeci">KernelTimer(cudaStream_t stream=0)</div><div class="ttdef"><b>Definition:</b> <a href="Timer_8cpp_source.html#l00017">Timer.cpp:17</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1CpuTimer_html_af2f8e832b4c5425e152834ae7aa2af49"><div class="ttname"><a href="classfaiss_1_1gpu_1_1CpuTimer.html#af2f8e832b4c5425e152834ae7aa2af49">faiss::gpu::CpuTimer::CpuTimer</a></div><div class="ttdeci">CpuTimer()</div><div class="ttdoc">Creates and starts a new timer. </div><div class="ttdef"><b>Definition:</b> <a href="Timer_8cpp_source.html#l00047">Timer.cpp:47</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1KernelTimer_html_ac79ab2b2ef60a3fb713f7c80380ad2b5"><div class="ttname"><a href="classfaiss_1_1gpu_1_1KernelTimer.html#ac79ab2b2ef60a3fb713f7c80380ad2b5">faiss::gpu::KernelTimer::elapsedMilliseconds</a></div><div class="ttdeci">float elapsedMilliseconds()</div><div class="ttdef"><b>Definition:</b> <a href="Timer_8cpp_source.html#l00034">Timer.cpp:34</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1KernelTimer_html_af9883350bf0732b2452f1ce4670266fa"><div class="ttname"><a href="classfaiss_1_1gpu_1_1KernelTimer.html#af9883350bf0732b2452f1ce4670266fa">faiss::gpu::KernelTimer::~KernelTimer</a></div><div class="ttdeci">~KernelTimer()</div><div class="ttdoc">Destructor releases event resources. </div><div class="ttdef"><b>Definition:</b> <a href="Timer_8cpp_source.html#l00028">Timer.cpp:28</a></div></div>
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