682 lines
88 KiB
HTML
682 lines
88 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
|
<meta name="generator" content="Doxygen 1.8.5"/>
|
|
<title>Faiss: /data/users/hoss/faiss/gpu/utils/Select.cuh Source File</title>
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="jquery.js"></script>
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="search/search.js"></script>
|
|
<script type="text/javascript">
|
|
$(document).ready(function() { searchBox.OnSelectItem(0); });
|
|
</script>
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
|
</head>
|
|
<body>
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
|
<div id="titlearea">
|
|
<table cellspacing="0" cellpadding="0">
|
|
<tbody>
|
|
<tr style="height: 56px;">
|
|
<td style="padding-left: 0.5em;">
|
|
<div id="projectname">Faiss
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<!-- end header part -->
|
|
<!-- Generated by Doxygen 1.8.5 -->
|
|
<script type="text/javascript">
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
|
</script>
|
|
<div id="navrow1" class="tabs">
|
|
<ul class="tablist">
|
|
<li><a href="index.html"><span>Main Page</span></a></li>
|
|
<li><a href="namespaces.html"><span>Namespaces</span></a></li>
|
|
<li><a href="annotated.html"><span>Classes</span></a></li>
|
|
<li class="current"><a href="files.html"><span>Files</span></a></li>
|
|
<li>
|
|
<div id="MSearchBox" class="MSearchBoxInactive">
|
|
<span class="left">
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
alt=""/>
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
|
</span><span class="right">
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
|
</span>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div id="navrow2" class="tabs2">
|
|
<ul class="tablist">
|
|
<li><a href="files.html"><span>File List</span></a></li>
|
|
</ul>
|
|
</div>
|
|
<!-- window showing the filter options -->
|
|
<div id="MSearchSelectWindow"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
|
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Friends</a></div>
|
|
|
|
<!-- iframe showing the search results (closed by default) -->
|
|
<div id="MSearchResultsWindow">
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
|
name="MSearchResults" id="MSearchResults">
|
|
</iframe>
|
|
</div>
|
|
|
|
<div id="nav-path" class="navpath">
|
|
<ul>
|
|
<li class="navelem"><a class="el" href="dir_5956a3e80a20e8e03eb577bedb92689f.html">gpu</a></li><li class="navelem"><a class="el" href="dir_5865795754b604b902e524ed1add5694.html">utils</a></li> </ul>
|
|
</div>
|
|
</div><!-- top -->
|
|
<div class="header">
|
|
<div class="headertitle">
|
|
<div class="title">Select.cuh</div> </div>
|
|
</div><!--header-->
|
|
<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) Facebook, Inc. and its affiliates.</span></div>
|
|
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
|
|
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
|
|
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
|
|
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
|
|
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
|
|
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#pragma once</span></div>
|
|
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></span></div>
|
|
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "Comparators.cuh"</span></div>
|
|
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "DeviceDefs.cuh"</span></div>
|
|
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "MergeNetworkBlock.cuh"</span></div>
|
|
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "MergeNetworkWarp.cuh"</span></div>
|
|
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "PtxUtils.cuh"</span></div>
|
|
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "Reductions.cuh"</span></div>
|
|
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "ReductionOperators.cuh"</span></div>
|
|
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "Tensor.cuh"</span></div>
|
|
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
|
|
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
|
|
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
|
|
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// Specialization for block-wide monotonic merges producing a merge sort</span></div>
|
|
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// since what we really want is a constexpr loop expansion</span></div>
|
|
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> NumWarps,</div>
|
|
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordtype">int</span> NumThreads, <span class="keyword">typename</span> K, <span class="keyword">typename</span> V, <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordtype">bool</span> Dir, <span class="keyword">typename</span> Comp></div>
|
|
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html"> 26</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge</a> {</div>
|
|
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> };</div>
|
|
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
|
|
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> NumThreads, <span class="keyword">typename</span> K, <span class="keyword">typename</span> V, <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">bool</span> Dir, <span class="keyword">typename</span> Comp></div>
|
|
<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1FinalBlockMerge_3_011_00_01NumThreads_00_01K_00_01V_00_01NumWarpQ_00_01Dir_00_01Comp_01_4.html"> 31</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge</a><1, NumThreads, K, V, NumWarpQ, Dir, Comp> {</div>
|
|
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> merge(K* sharedK, V* sharedV) {</div>
|
|
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="comment">// no merge required; single warp</span></div>
|
|
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  }</div>
|
|
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> };</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> <span class="keyword">template</span> <<span class="keywordtype">int</span> NumThreads, <span class="keyword">typename</span> K, <span class="keyword">typename</span> V, <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">bool</span> Dir, <span class="keyword">typename</span> Comp></div>
|
|
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1FinalBlockMerge_3_012_00_01NumThreads_00_01K_00_01V_00_01NumWarpQ_00_01Dir_00_01Comp_01_4.html"> 39</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge</a><2, NumThreads, K, V, NumWarpQ, Dir, Comp> {</div>
|
|
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> merge(K* sharedK, V* sharedV) {</div>
|
|
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// Final merge doesn't need to fully merge the second list</span></div>
|
|
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 2),</div>
|
|
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  NumWarpQ, !Dir, Comp, <span class="keyword">false</span>>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  }</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"> 47</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> NumThreads, <span class="keyword">typename</span> K, <span class="keyword">typename</span> V, <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">bool</span> Dir, <span class="keyword">typename</span> Comp></div>
|
|
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1FinalBlockMerge_3_014_00_01NumThreads_00_01K_00_01V_00_01NumWarpQ_00_01Dir_00_01Comp_01_4.html"> 49</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge</a><4, NumThreads, K, V, NumWarpQ, Dir, Comp> {</div>
|
|
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> merge(K* sharedK, V* sharedV) {</div>
|
|
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 2),</div>
|
|
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  NumWarpQ, !Dir, Comp>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">// Final merge doesn't need to fully merge the second list</span></div>
|
|
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 4),</div>
|
|
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  NumWarpQ * 2, !Dir, Comp, <span class="keyword">false</span>>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
|
|
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> };</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="keyword">template</span> <<span class="keywordtype">int</span> NumThreads, <span class="keyword">typename</span> K, <span class="keyword">typename</span> V, <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">bool</span> Dir, <span class="keyword">typename</span> Comp></div>
|
|
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1FinalBlockMerge_3_018_00_01NumThreads_00_01K_00_01V_00_01NumWarpQ_00_01Dir_00_01Comp_01_4.html"> 61</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge</a><8, NumThreads, K, V, NumWarpQ, Dir, Comp> {</div>
|
|
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> merge(K* sharedK, V* sharedV) {</div>
|
|
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 2),</div>
|
|
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  NumWarpQ, !Dir, Comp>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 4),</div>
|
|
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  NumWarpQ * 2, !Dir, Comp>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Final merge doesn't need to fully merge the second list</span></div>
|
|
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  blockMerge<NumThreads, K, V, NumThreads / (kWarpSize * 8),</div>
|
|
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  NumWarpQ * 4, !Dir, Comp, <span class="keyword">false</span>>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div>
|
|
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> };</div>
|
|
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
|
|
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// `Dir` true, produce largest values.</span></div>
|
|
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">// `Dir` false, produce smallest values.</span></div>
|
|
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">template</span> <<span class="keyword">typename</span> K,</div>
|
|
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">typename</span> V,</div>
|
|
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordtype">bool</span> Dir,</div>
|
|
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">typename</span> Comp,</div>
|
|
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordtype">int</span> NumThreadQ,</div>
|
|
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">int</span> ThreadsPerBlock></div>
|
|
<div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1BlockSelect.html"> 82</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html">BlockSelect</a> {</div>
|
|
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> kNumWarps = ThreadsPerBlock / kWarpSize;</div>
|
|
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> kTotalWarpSortSize = NumWarpQ;</div>
|
|
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
|
|
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  __device__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html">BlockSelect</a>(K initKVal,</div>
|
|
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  V initVVal,</div>
|
|
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  K* smemK,</div>
|
|
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  V* smemV,</div>
|
|
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">int</span> k) :</div>
|
|
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  initK(initKVal),</div>
|
|
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  initV(initVVal),</div>
|
|
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  numVals(0),</div>
|
|
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  warpKTop(initKVal),</div>
|
|
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  sharedK(smemK),</div>
|
|
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  sharedV(smemV),</div>
|
|
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  kMinus1(k - 1) {</div>
|
|
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  static_assert(utils::isPowerOf2(ThreadsPerBlock),</div>
|
|
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="stringliteral">"threads must be a power-of-2"</span>);</div>
|
|
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  static_assert(utils::isPowerOf2(NumWarpQ),</div>
|
|
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="stringliteral">"warp queue must be power-of-2"</span>);</div>
|
|
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
|
|
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">// Fill the per-thread queue keys with the default value</span></div>
|
|
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < NumThreadQ; ++i) {</div>
|
|
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  threadK[i] = initK;</div>
|
|
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  threadV[i] = initV;</div>
|
|
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div>
|
|
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
|
|
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">int</span> laneId = getLaneId();</div>
|
|
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">int</span> warpId = threadIdx.x / kWarpSize;</div>
|
|
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  warpK = sharedK + warpId * kTotalWarpSortSize;</div>
|
|
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  warpV = sharedV + warpId * kTotalWarpSortSize;</div>
|
|
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">// Fill warp queue (only the actual queue space is fine, not where</span></div>
|
|
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// we write the per-thread queues for merging)</span></div>
|
|
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = laneId; i < NumWarpQ; i += kWarpSize) {</div>
|
|
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  warpK[i] = initK;</div>
|
|
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  warpV[i] = initV;</div>
|
|
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div>
|
|
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
|
|
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  warpFence();</div>
|
|
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> addThreadQ(K k, V v) {</div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> (Dir ? Comp::gt(k, warpKTop) : Comp::lt(k, warpKTop)) {</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// Rotate right</span></div>
|
|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = NumThreadQ - 1; i > 0; --i) {</div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  threadK[i] = threadK[i - 1];</div>
|
|
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  threadV[i] = threadV[i - 1];</div>
|
|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
|
|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  threadK[0] = k;</div>
|
|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  threadV[0] = v;</div>
|
|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  ++numVals;</div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</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>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> checkThreadQ() {</div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordtype">bool</span> needSort = (numVals == NumThreadQ);</div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor"></span> needSort = __any_sync(0xffffffff, needSort);</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor">#else</span></div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor"></span> needSort = __any(needSort);</div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor"></span></div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">if</span> (!needSort) {</div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="comment">// no lanes have triggered a sort</span></div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// This has a trailing warpFence</span></div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html#a08aa08d16ec29c7b7dccc65edd5115cd">mergeWarpQ</a>();</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>  <span class="comment">// Any top-k elements have been merged into the warp queue; we're</span></div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// free to reset the thread queues</span></div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  numVals = 0;</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < NumThreadQ; ++i) {</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  threadK[i] = initK;</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  threadV[i] = initV;</div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// We have to beat at least this element</span></div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  warpKTop = warpK[kMinus1];</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  warpFence();</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> /// This function handles sorting and merging together the</span></div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> /// per-thread queues with the warp-wide queue, creating a sorted</span></div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> /// list across both</span></div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1BlockSelect.html#a08aa08d16ec29c7b7dccc65edd5115cd"> 176</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html#a08aa08d16ec29c7b7dccc65edd5115cd">mergeWarpQ</a>() {</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">int</span> laneId = getLaneId();</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// Sort all of the per-thread queues</span></div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  warpSortAnyRegisters<K, V, NumThreadQ, !Dir, Comp>(threadK, threadV);</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  constexpr <span class="keywordtype">int</span> kNumWarpQRegisters = NumWarpQ / kWarpSize;</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  K warpKRegisters[kNumWarpQRegisters];</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  V warpVRegisters[kNumWarpQRegisters];</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> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < kNumWarpQRegisters; ++i) {</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  warpKRegisters[i] = warpK[i * kWarpSize + laneId];</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  warpVRegisters[i] = warpV[i * kWarpSize + laneId];</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</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>  warpFence();</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// The warp queue is already sorted, and now that we've sorted the</span></div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// per-thread queue, merge both sorted lists together, producing</span></div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// one sorted list</span></div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  warpMergeAnyRegisters<K, V,</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  kNumWarpQRegisters, NumThreadQ, !Dir, Comp, <span class="keyword">false</span>>(</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  warpKRegisters, warpVRegisters, threadK, threadV);</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">// Write back out the warp queue</span></div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < kNumWarpQRegisters; ++i) {</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  warpK[i * kWarpSize + laneId] = warpKRegisters[i];</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  warpV[i * kWarpSize + laneId] = warpVRegisters[i];</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  warpFence();</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"> /// WARNING: all threads in a warp must participate in this.</span></div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> /// Otherwise, you must call the constituent parts separately.</span></div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1BlockSelect.html#a52e2521dfc565075e73ff1a4c53474d9"> 213</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html#a52e2521dfc565075e73ff1a4c53474d9">add</a>(K k, V v) {</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  addThreadQ(k, v);</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  checkThreadQ();</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> reduce() {</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">// Have all warps dump and merge their queues; this will produce</span></div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// the final per-warp results</span></div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html#a08aa08d16ec29c7b7dccc65edd5115cd">mergeWarpQ</a>();</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="comment">// block-wide dep; thus far, all warps have been completely</span></div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">// independent</span></div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  __syncthreads();</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> </div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="comment">// All warp queues are contiguous in smem.</span></div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="comment">// Now, we have kNumWarps lists of NumWarpQ elements.</span></div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="comment">// This is a power of 2.</span></div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">FinalBlockMerge<kNumWarps, ThreadsPerBlock, K, V, NumWarpQ, Dir, Comp>::</a></div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <a class="code" href="structfaiss_1_1gpu_1_1FinalBlockMerge.html"> merge</a>(sharedK, sharedV);</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="comment">// The block-wide merge has a trailing syncthreads</span></div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  }</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="comment">// Default element key</span></div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">const</span> K initK;</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// Default element value</span></div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">const</span> V initV;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// Number of valid elements in our thread queue</span></div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordtype">int</span> numVals;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="comment">// The k-th highest (Dir) or lowest (!Dir) element</span></div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  K warpKTop;</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// Thread queue values</span></div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  K threadK[NumThreadQ];</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  V threadV[NumThreadQ];</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">// Queues for all warps</span></div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  K* sharedK;</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  V* sharedV;</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>  <span class="comment">// Our warp's queue (points into sharedK/sharedV)</span></div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="comment">// warpK[0] is highest (Dir) or lowest (!Dir)</span></div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  K* warpK;</div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  V* warpV;</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="comment">// This is a cached k-1 value</span></div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordtype">int</span> kMinus1;</div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> };</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment">/// Specialization for k == 1 (NumWarpQ == 1)</span></div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keyword">typename</span> K,</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keyword">typename</span> V,</div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordtype">bool</span> Dir,</div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">typename</span> Comp,</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordtype">int</span> NumThreadQ,</div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordtype">int</span> ThreadsPerBlock></div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1BlockSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4.html"> 272</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html">BlockSelect</a><K, V, Dir, Comp, 1, NumThreadQ, ThreadsPerBlock> {</div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> kNumWarps = ThreadsPerBlock / kWarpSize;</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  __device__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html">BlockSelect</a>(K initK, V initV, K* smemK, V* smemV, <span class="keywordtype">int</span> k) :</div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  sharedK(smemK),</div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  sharedV(smemV),</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  threadK(initK),</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  threadV(initV) {</div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  }</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> addThreadQ(K k, V v) {</div>
|
|
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordtype">bool</span> swap = Dir ? Comp::gt(k, threadK) : Comp::lt(k, threadK);</div>
|
|
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  threadK = swap ? k : threadK;</div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  threadV = swap ? v : threadV;</div>
|
|
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
|
|
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> checkThreadQ() {</div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// We don't need to do anything here, since the warp doesn't</span></div>
|
|
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// cooperate until the end</span></div>
|
|
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
|
|
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div>
|
|
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1BlockSelect.html#a52e2521dfc565075e73ff1a4c53474d9">add</a>(K k, V v) {</div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  addThreadQ(k, v);</div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  }</div>
|
|
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> </div>
|
|
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> reduce() {</div>
|
|
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// Reduce within the warp</span></div>
|
|
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a> pair(threadK, threadV);</div>
|
|
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">if</span> (Dir) {</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  pair =</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  warpReduceAll<Pair<K, V>, <a class="code" href="structfaiss_1_1gpu_1_1Max.html">Max<Pair<K, V></a>>>(pair, <a class="code" href="structfaiss_1_1gpu_1_1Max.html">Max<Pair<K, V></a>>());</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  pair =</div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  warpReduceAll<Pair<K, V>, <a class="code" href="structfaiss_1_1gpu_1_1Min.html">Min<Pair<K, V></a>>>(pair, <a class="code" href="structfaiss_1_1gpu_1_1Min.html">Min<Pair<K, V></a>>());</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="comment">// Each warp writes out a single value</span></div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordtype">int</span> laneId = getLaneId();</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordtype">int</span> warpId = threadIdx.x / kWarpSize;</div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">if</span> (laneId == 0) {</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  sharedK[warpId] = pair.k;</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  sharedV[warpId] = pair.v;</div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  }</div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  __syncthreads();</div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="comment">// We typically use this for small blocks (<= 128), just having the first</span></div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// thread in the block perform the reduction across warps is</span></div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="comment">// faster</span></div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">if</span> (threadIdx.x == 0) {</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  threadK = sharedK[0];</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  threadV = sharedV[0];</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> </div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < kNumWarps; ++i) {</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  K k = sharedK[i];</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  V v = sharedV[i];</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> </div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordtype">bool</span> swap = Dir ? Comp::gt(k, threadK) : Comp::lt(k, threadK);</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  threadK = swap ? k : threadK;</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  threadV = swap ? v : threadV;</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> </div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="comment">// Hopefully a thread's smem reads/writes are ordered wrt</span></div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="comment">// itself, so no barrier needed :)</span></div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  sharedK[0] = threadK;</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  sharedV[0] = threadV;</div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  }</div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> </div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="comment">// In case other threads wish to read this value</span></div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  __syncthreads();</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="comment">// threadK is lowest (Dir) or highest (!Dir)</span></div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  K threadK;</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  V threadV;</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">// Where we reduce in smem</span></div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  K* sharedK;</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  V* sharedV;</div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> };</div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">// per-warp WarpSelect</span></div>
|
|
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment">// `Dir` true, produce largest values.</span></div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment">// `Dir` false, produce smallest values.</span></div>
|
|
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="keyword">template</span> <<span class="keyword">typename</span> K,</div>
|
|
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keyword">typename</span> V,</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordtype">bool</span> Dir,</div>
|
|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">typename</span> Comp,</div>
|
|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordtype">int</span> NumWarpQ,</div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordtype">int</span> NumThreadQ,</div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordtype">int</span> ThreadsPerBlock></div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect.html"> 369</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html">WarpSelect</a> {</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> kNumWarpQRegisters = NumWarpQ / kWarpSize;</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  __device__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html">WarpSelect</a>(K initKVal, V initVVal, <span class="keywordtype">int</span> k) :</div>
|
|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  initK(initKVal),</div>
|
|
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  initV(initVVal),</div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  numVals(0),</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  warpKTop(initKVal),</div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  kLane((k - 1) % kWarpSize) {</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  static_assert(utils::isPowerOf2(ThreadsPerBlock),</div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="stringliteral">"threads must be a power-of-2"</span>);</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  static_assert(utils::isPowerOf2(NumWarpQ),</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="stringliteral">"warp queue must be power-of-2"</span>);</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div>
|
|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">// Fill the per-thread queue keys with the default value</span></div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < NumThreadQ; ++i) {</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  threadK[i] = initK;</div>
|
|
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  threadV[i] = initV;</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  }</div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="comment">// Fill the warp queue with the default value</span></div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < kNumWarpQRegisters; ++i) {</div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  warpK[i] = initK;</div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  warpV[i] = initV;</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  }</div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> addThreadQ(K k, V v) {</div>
|
|
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">if</span> (Dir ? Comp::gt(k, warpKTop) : Comp::lt(k, warpKTop)) {</div>
|
|
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="comment">// Rotate right</span></div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = NumThreadQ - 1; i > 0; --i) {</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  threadK[i] = threadK[i - 1];</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  threadV[i] = threadV[i - 1];</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  threadK[0] = k;</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  threadV[0] = v;</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  ++numVals;</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div>
|
|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  }</div>
|
|
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div>
|
|
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> checkThreadQ() {</div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keywordtype">bool</span> needSort = (numVals == NumThreadQ);</div>
|
|
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div>
|
|
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="preprocessor"></span> needSort = __any_sync(0xffffffff, needSort);</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="preprocessor">#else</span></div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="preprocessor"></span> needSort = __any(needSort);</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="preprocessor"></span></div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keywordflow">if</span> (!needSort) {</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="comment">// no lanes have triggered a sort</span></div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  }</div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> </div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#a408cbf9a09094078cb62018400f30076">mergeWarpQ</a>();</div>
|
|
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> </div>
|
|
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="comment">// Any top-k elements have been merged into the warp queue; we're</span></div>
|
|
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="comment">// free to reset the thread queues</span></div>
|
|
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  numVals = 0;</div>
|
|
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div>
|
|
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < NumThreadQ; ++i) {</div>
|
|
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  threadK[i] = initK;</div>
|
|
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  threadV[i] = initV;</div>
|
|
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div>
|
|
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div>
|
|
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="comment">// We have to beat at least this element</span></div>
|
|
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  warpKTop = shfl(warpK[kNumWarpQRegisters - 1], kLane);</div>
|
|
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  }</div>
|
|
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment"> /// This function handles sorting and merging together the</span></div>
|
|
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment"> /// per-thread queues with the warp-wide queue, creating a sorted</span></div>
|
|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> <span class="comment"> /// list across both</span></div>
|
|
<div class="line"><a name="l00446"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect.html#a408cbf9a09094078cb62018400f30076"> 446</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#a408cbf9a09094078cb62018400f30076">mergeWarpQ</a>() {</div>
|
|
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="comment">// Sort all of the per-thread queues</span></div>
|
|
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  warpSortAnyRegisters<K, V, NumThreadQ, !Dir, Comp>(threadK, threadV);</div>
|
|
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> </div>
|
|
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="comment">// The warp queue is already sorted, and now that we've sorted the</span></div>
|
|
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="comment">// per-thread queue, merge both sorted lists together, producing</span></div>
|
|
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="comment">// one sorted list</span></div>
|
|
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  warpMergeAnyRegisters<K, V,</div>
|
|
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  kNumWarpQRegisters, NumThreadQ, !Dir, Comp, <span class="keyword">false</span>>(</div>
|
|
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  warpK, warpV, threadK, threadV);</div>
|
|
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div>
|
|
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"> /// WARNING: all threads in a warp must participate in this.</span></div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment"> /// Otherwise, you must call the constituent parts separately.</span></div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect.html#ab516c923a93dda2c846ecb57b29227fd"> 460</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#ab516c923a93dda2c846ecb57b29227fd">add</a>(K k, V v) {</div>
|
|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  addThreadQ(k, v);</div>
|
|
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  checkThreadQ();</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  }</div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> </div>
|
|
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> reduce() {</div>
|
|
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="comment">// Have all warps dump and merge their queues; this will produce</span></div>
|
|
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="comment">// the final per-warp results</span></div>
|
|
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#a408cbf9a09094078cb62018400f30076">mergeWarpQ</a>();</div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  }</div>
|
|
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> /// Dump final k selected values for this warp out</span></div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect.html#a1cd82964e633531a95d5d095e012acb5"> 472</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#a1cd82964e633531a95d5d095e012acb5">writeOut</a>(K* outK, V* outV, <span class="keywordtype">int</span> k) {</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordtype">int</span> laneId = getLaneId();</div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="preprocessor">#pragma unroll</span></div>
|
|
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < kNumWarpQRegisters; ++i) {</div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <span class="keywordtype">int</span> idx = i * kWarpSize + laneId;</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">if</span> (idx < k) {</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  outK[idx] = warpK[i];</div>
|
|
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  outV[idx] = warpV[i];</div>
|
|
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  }</div>
|
|
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  }</div>
|
|
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  }</div>
|
|
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> </div>
|
|
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="comment">// Default element key</span></div>
|
|
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keyword">const</span> K initK;</div>
|
|
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div>
|
|
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="comment">// Default element value</span></div>
|
|
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keyword">const</span> V initV;</div>
|
|
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> </div>
|
|
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="comment">// Number of valid elements in our thread queue</span></div>
|
|
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keywordtype">int</span> numVals;</div>
|
|
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> </div>
|
|
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="comment">// The k-th highest (Dir) or lowest (!Dir) element</span></div>
|
|
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  K warpKTop;</div>
|
|
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div>
|
|
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="comment">// Thread queue values</span></div>
|
|
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  K threadK[NumThreadQ];</div>
|
|
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  V threadV[NumThreadQ];</div>
|
|
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> </div>
|
|
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="comment">// warpK[0] is highest (Dir) or lowest (!Dir)</span></div>
|
|
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  K warpK[kNumWarpQRegisters];</div>
|
|
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  V warpV[kNumWarpQRegisters];</div>
|
|
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> </div>
|
|
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="comment">// This is what lane we should load an approximation (>=k) to the</span></div>
|
|
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="comment">// kth element from the last register in the warp queue (i.e.,</span></div>
|
|
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="comment">// warpK[kNumWarpQRegisters - 1]).</span></div>
|
|
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordtype">int</span> kLane;</div>
|
|
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> };</div>
|
|
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment">/// Specialization for k == 1 (NumWarpQ == 1)</span></div>
|
|
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keyword">typename</span> K,</div>
|
|
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keyword">typename</span> V,</div>
|
|
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordtype">bool</span> Dir,</div>
|
|
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keyword">typename</span> Comp,</div>
|
|
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordtype">int</span> NumThreadQ,</div>
|
|
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keywordtype">int</span> ThreadsPerBlock></div>
|
|
<div class="line"><a name="l00519"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4.html"> 519</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html">WarpSelect</a><K, V, Dir, Comp, 1, NumThreadQ, ThreadsPerBlock> {</div>
|
|
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> kNumWarps = ThreadsPerBlock / kWarpSize;</div>
|
|
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div>
|
|
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  __device__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html">WarpSelect</a>(K initK, V initV, <span class="keywordtype">int</span> k) :</div>
|
|
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  threadK(initK),</div>
|
|
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  threadV(initV) {</div>
|
|
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  }</div>
|
|
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> </div>
|
|
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> addThreadQ(K k, V v) {</div>
|
|
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keywordtype">bool</span> swap = Dir ? Comp::gt(k, threadK) : Comp::lt(k, threadK);</div>
|
|
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  threadK = swap ? k : threadK;</div>
|
|
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  threadV = swap ? v : threadV;</div>
|
|
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  }</div>
|
|
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> </div>
|
|
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> checkThreadQ() {</div>
|
|
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="comment">// We don't need to do anything here, since the warp doesn't</span></div>
|
|
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="comment">// cooperate until the end</span></div>
|
|
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  }</div>
|
|
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span> </div>
|
|
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect.html#ab516c923a93dda2c846ecb57b29227fd">add</a>(K k, V v) {</div>
|
|
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  addThreadQ(k, v);</div>
|
|
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  }</div>
|
|
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> </div>
|
|
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> reduce() {</div>
|
|
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="comment">// Reduce within the warp</span></div>
|
|
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a> pair(threadK, threadV);</div>
|
|
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> </div>
|
|
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">if</span> (Dir) {</div>
|
|
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  pair =</div>
|
|
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  warpReduceAll<Pair<K, V>, <a class="code" href="structfaiss_1_1gpu_1_1Max.html">Max<Pair<K, V></a>>>(pair, <a class="code" href="structfaiss_1_1gpu_1_1Max.html">Max<Pair<K, V></a>>());</div>
|
|
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  pair =</div>
|
|
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  warpReduceAll<Pair<K, V>, <a class="code" href="structfaiss_1_1gpu_1_1Min.html">Min<Pair<K, V></a>>>(pair, <a class="code" href="structfaiss_1_1gpu_1_1Min.html">Min<Pair<K, V></a>>());</div>
|
|
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  }</div>
|
|
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> </div>
|
|
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  threadK = pair.k;</div>
|
|
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  threadV = pair.v;</div>
|
|
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  }</div>
|
|
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment"></span></div>
|
|
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment"> /// Dump final k selected values for this warp out</span></div>
|
|
<div class="line"><a name="l00559"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1WarpSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4.html#a65f05abb17750d13bd9e03d56cd86fd2"> 559</a></span> <span class="comment"></span> __device__ <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1gpu_1_1WarpSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4.html#a65f05abb17750d13bd9e03d56cd86fd2">writeOut</a>(K* outK, V* outV, <span class="keywordtype">int</span> k) {</div>
|
|
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">if</span> (getLaneId() == 0) {</div>
|
|
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  *outK = threadK;</div>
|
|
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  *outV = threadV;</div>
|
|
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div>
|
|
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  }</div>
|
|
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> </div>
|
|
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  <span class="comment">// threadK is lowest (Dir) or highest (!Dir)</span></div>
|
|
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  K threadK;</div>
|
|
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  V threadV;</div>
|
|
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> };</div>
|
|
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> </div>
|
|
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> } } <span class="comment">// namespace</span></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1FinalBlockMerge_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1FinalBlockMerge.html">faiss::gpu::FinalBlockMerge</a></div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00026">Select.cuh:26</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1Pair_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Pair.html">faiss::gpu::Pair</a></div><div class="ttdoc">A simple pair type for CUDA device usage. </div><div class="ttdef"><b>Definition:</b> <a href="Pair_8cuh_source.html#l00019">Pair.cuh:19</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1WarpSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4_html_a65f05abb17750d13bd9e03d56cd86fd2"><div class="ttname"><a href="structfaiss_1_1gpu_1_1WarpSelect_3_01K_00_01V_00_01Dir_00_01Comp_00_011_00_01NumThreadQ_00_01ThreadsPerBlock_01_4.html#a65f05abb17750d13bd9e03d56cd86fd2">faiss::gpu::WarpSelect< K, V, Dir, Comp, 1, NumThreadQ, ThreadsPerBlock >::writeOut</a></div><div class="ttdeci">__device__ void writeOut(K *outK, V *outV, int k)</div><div class="ttdoc">Dump final k selected values for this warp out. </div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00559">Select.cuh:559</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1BlockSelect_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1BlockSelect.html">faiss::gpu::BlockSelect</a></div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00082">Select.cuh:82</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1WarpSelect_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1WarpSelect.html">faiss::gpu::WarpSelect</a></div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00369">Select.cuh:369</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1WarpSelect_html_a1cd82964e633531a95d5d095e012acb5"><div class="ttname"><a href="structfaiss_1_1gpu_1_1WarpSelect.html#a1cd82964e633531a95d5d095e012acb5">faiss::gpu::WarpSelect::writeOut</a></div><div class="ttdeci">__device__ void writeOut(K *outK, V *outV, int k)</div><div class="ttdoc">Dump final k selected values for this warp out. </div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00472">Select.cuh:472</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1WarpSelect_html_ab516c923a93dda2c846ecb57b29227fd"><div class="ttname"><a href="structfaiss_1_1gpu_1_1WarpSelect.html#ab516c923a93dda2c846ecb57b29227fd">faiss::gpu::WarpSelect::add</a></div><div class="ttdeci">__device__ void add(K k, V v)</div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00460">Select.cuh:460</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1Min_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Min.html">faiss::gpu::Min</a></div><div class="ttdef"><b>Definition:</b> <a href="ReductionOperators_8cuh_source.html#l00030">ReductionOperators.cuh:30</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1BlockSelect_html_a52e2521dfc565075e73ff1a4c53474d9"><div class="ttname"><a href="structfaiss_1_1gpu_1_1BlockSelect.html#a52e2521dfc565075e73ff1a4c53474d9">faiss::gpu::BlockSelect::add</a></div><div class="ttdeci">__device__ void add(K k, V v)</div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00213">Select.cuh:213</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1WarpSelect_html_a408cbf9a09094078cb62018400f30076"><div class="ttname"><a href="structfaiss_1_1gpu_1_1WarpSelect.html#a408cbf9a09094078cb62018400f30076">faiss::gpu::WarpSelect::mergeWarpQ</a></div><div class="ttdeci">__device__ void mergeWarpQ()</div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00446">Select.cuh:446</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1Max_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Max.html">faiss::gpu::Max</a></div><div class="ttdef"><b>Definition:</b> <a href="ReductionOperators_8cuh_source.html#l00041">ReductionOperators.cuh:41</a></div></div>
|
|
<div class="ttc" id="structfaiss_1_1gpu_1_1BlockSelect_html_a08aa08d16ec29c7b7dccc65edd5115cd"><div class="ttname"><a href="structfaiss_1_1gpu_1_1BlockSelect.html#a08aa08d16ec29c7b7dccc65edd5115cd">faiss::gpu::BlockSelect::mergeWarpQ</a></div><div class="ttdeci">__device__ void mergeWarpQ()</div><div class="ttdef"><b>Definition:</b> <a href="Select_8cuh_source.html#l00176">Select.cuh:176</a></div></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
<!-- start footer part -->
|
|
<hr class="footer"/><address class="footer"><small>
|
|
Generated by  <a href="http://www.doxygen.org/index.html">
|
|
<img class="footer" src="doxygen.png" alt="doxygen"/>
|
|
</a> 1.8.5
|
|
</small></address>
|
|
</body>
|
|
</html>
|