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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">StackDeviceMemory.cpp</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">/**</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This source code is licensed under the CC-by-NC license found in the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "StackDeviceMemory.h"</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "DeviceUtils.h"</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "StaticUtils.h"</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "../../FaissAssert.h"</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <sstream></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"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a783de9fc71cf57bf336c474f6155453d"> 21</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a783de9fc71cf57bf336c474f6155453d">StackDeviceMemory::Stack::Stack</a>(<span class="keywordtype">int</span> d, <span class="keywordtype">size_t</span> sz)</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  : device_(d),</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  isOwner_(true),</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  start_(nullptr),</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  end_(nullptr),</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  size_(sz),</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  head_(nullptr),</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  mallocCurrent_(0),</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  highWaterMemoryUsed_(0),</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  highWaterMalloc_(0) {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> s(<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a0950e30ddd0008367a0fb109db9c01b9">device_</a>);</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>  cudaError_t err = cudaMalloc(&<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#aed64654e7d498114fdd48a6f1cdb1aa2">start_</a>, <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a3df7ba513acd46aa69180585cb4e7aac">size_</a>);</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  FAISS_ASSERT(err == cudaSuccess);</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>  <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a140d3dc4577883704708ecca493813ff">head_</a> = <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#aed64654e7d498114fdd48a6f1cdb1aa2">start_</a>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  end_ = <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#aed64654e7d498114fdd48a6f1cdb1aa2">start_</a> + <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a3df7ba513acd46aa69180585cb4e7aac">size_</a>;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> }</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a92a16b44da0ab2a89d3d032b762c0232"> 40</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a783de9fc71cf57bf336c474f6155453d">StackDeviceMemory::Stack::Stack</a>(<span class="keywordtype">int</span> d, <span class="keywordtype">void</span>* p, <span class="keywordtype">size_t</span> sz, <span class="keywordtype">bool</span> isOwner)</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  : <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>(d),</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  isOwner_(isOwner),</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  start_((char*) p),</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  end_(((char*) p) + sz),</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  size_(sz),</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  head_((char*) p) {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> StackDeviceMemory::Stack::~Stack() {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">if</span> (isOwner_) {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> s(<a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>);</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  cudaError_t err = cudaFree(start_);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  FAISS_ASSERT(err == cudaSuccess);</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> }</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> <span class="keywordtype">size_t</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ac9fe1174255fedfee546bb5e37c12834"> 59</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ac9fe1174255fedfee546bb5e37c12834">StackDeviceMemory::Stack::getSizeAvailable</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> (end_ - head_);</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> </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keywordtype">char</span>*</div>
<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ab45d128f288728df5baf03defd50cec7"> 64</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ab45d128f288728df5baf03defd50cec7">StackDeviceMemory::Stack::getAlloc</a>(<span class="keywordtype">size_t</span> size, cudaStream_t stream) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">if</span> (size > (end_ - head_)) {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// Too large for our stack</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> s(<a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">char</span>* p = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">auto</span> err = cudaMalloc(&p, size);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  FAISS_ASSERT(err == cudaSuccess);</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>  mallocCurrent_ += size;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  highWaterMalloc_ = std::max(highWaterMalloc_, mallocCurrent_);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  fprintf(stderr, <span class="stringliteral">"WARN: increase temp memory to avoid cudaMalloc, "</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="stringliteral">"or decrease query/add size (alloc %zu B, highwater %zu B)\n"</span>,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  size, highWaterMalloc_);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> p;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// We can make the allocation out of our stack</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// Find all the ranges that we overlap that may have been</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// previously allocated; our allocation will be [head, endAlloc)</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">char</span>* startAlloc = head_;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">char</span>* endAlloc = head_ + size;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">while</span> (lastUsers_.size() > 0) {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">auto</span>& prevUser = lastUsers_.back();</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// Because there is a previous user, we must overlap it</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  FAISS_ASSERT(prevUser.start_ <= endAlloc && prevUser.end_ >= startAlloc);</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (stream != prevUser.stream_) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// Synchronization required</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// FIXME</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  FAISS_ASSERT(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (endAlloc < prevUser.end_) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// Update the previous user info</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  prevUser.start_ = endAlloc;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// If we're the exact size of the previous request, then we</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// don't need to continue</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">bool</span> done = (prevUser.end_ == endAlloc);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  lastUsers_.pop_back();</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span> (done) {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  }</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  head_ = endAlloc;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  FAISS_ASSERT(head_ <= end_);</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>  highWaterMemoryUsed_ = std::max(highWaterMemoryUsed_,</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  (<span class="keywordtype">size_t</span>) (head_ - start_));</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> startAlloc;</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> }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a5c652c126c2bf37149995cdb9d46a382"> 128</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a5c652c126c2bf37149995cdb9d46a382">StackDeviceMemory::Stack::returnAlloc</a>(<span class="keywordtype">char</span>* p,</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordtype">size_t</span> size,</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  cudaStream_t stream) {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (p < start_ || p >= end_) {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// This is not on our stack; it was a one-off allocation</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="classfaiss_1_1gpu_1_1DeviceScope.html">DeviceScope</a> s(<a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">auto</span> err = cudaFree(p);</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  FAISS_ASSERT(err == cudaSuccess);</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>  FAISS_ASSERT(mallocCurrent_ >= size);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  mallocCurrent_ -= size;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment">// This is on our stack</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// Allocations should be freed in the reverse order they are made</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  FAISS_ASSERT(p + size == head_);</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  head_ = p;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  lastUsers_.push_back(<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Range.html">Range</a>(p, p + size, stream));</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  }</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> }</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> std::string</div>
<div class="line"><a name="l00151"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a1c91f4d50ecb8bb659054227d32fb47b"> 151</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a1c91f4d50ecb8bb659054227d32fb47b">StackDeviceMemory::Stack::toString</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  std::stringstream s;</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>  s << <span class="stringliteral">"SDM device "</span> << <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a> << <span class="stringliteral">": Total memory "</span> << size_ << <span class="stringliteral">" ["</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  << (<span class="keywordtype">void</span>*) start_ << <span class="stringliteral">", "</span> << (<span class="keywordtype">void</span>*) end_ << <span class="stringliteral">")\n"</span>;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  s << <span class="stringliteral">" Available memory "</span> << (size_t) (end_ - head_)</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  << <span class="stringliteral">" ["</span> << (<span class="keywordtype">void</span>*) head_ << <span class="stringliteral">", "</span> << (<span class="keywordtype">void</span>*) end_ << <span class="stringliteral">")\n"</span>;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  s << <span class="stringliteral">" High water temp alloc "</span> << highWaterMemoryUsed_ << <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  s << <span class="stringliteral">" High water cudaMalloc "</span> << highWaterMalloc_ << <span class="stringliteral">"\n"</span>;</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="keywordtype">int</span> i = lastUsers_.size();</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it = lastUsers_.rbegin(); it != lastUsers_.rend(); ++it) {</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  s << i-- << <span class="stringliteral">": size "</span> << (size_t) (it->end_ - it->start_)</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  << <span class="stringliteral">" stream "</span> << it->stream_</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  << <span class="stringliteral">" ["</span> << (<span class="keywordtype">void</span>*) it->start_ << <span class="stringliteral">", "</span> << (<span class="keywordtype">void</span>*) it->end_ << <span class="stringliteral">")\n"</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> </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> s.str();</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> </div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">size_t</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a88e877d2b63d6e3d828a37462e780004"> 172</a></span> <a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a88e877d2b63d6e3d828a37462e780004">StackDeviceMemory::Stack::getHighWaterCudaMalloc</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> highWaterMalloc_;</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a130f900c32ba91ae1f872c7ee506a93e"> 176</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a130f900c32ba91ae1f872c7ee506a93e">StackDeviceMemory::StackDeviceMemory</a>(<span class="keywordtype">int</span> device, <span class="keywordtype">size_t</span> allocPerDevice)</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  : <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>(device),</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>(device, allocPerDevice) {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#afd7a84b8cd1f747d873cdd1ab07e8a4b"> 181</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a130f900c32ba91ae1f872c7ee506a93e">StackDeviceMemory::StackDeviceMemory</a>(<span class="keywordtype">int</span> device,</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordtype">void</span>* p, <span class="keywordtype">size_t</span> size, <span class="keywordtype">bool</span> isOwner)</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  : device_(device),</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  stack_(device, p, size, isOwner) {</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> </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> StackDeviceMemory::~StackDeviceMemory() {</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ab9dac6d8953630121f60fb804599f648"> 191</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ab9dac6d8953630121f60fb804599f648">StackDeviceMemory::getDevice</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>;</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> </div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <a class="code" href="classfaiss_1_1gpu_1_1DeviceMemoryReservation.html">DeviceMemoryReservation</a></div>
<div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a9d9a5dcdb2d016cf00d14b8831db638b"> 196</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a9d9a5dcdb2d016cf00d14b8831db638b">StackDeviceMemory::getMemory</a>(cudaStream_t stream, <span class="keywordtype">size_t</span> size) {</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">// We guarantee 16 byte alignment for allocations, so bump up `size`</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// to the next highest multiple of 16</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  size = utils::roundUp(size, (<span class="keywordtype">size_t</span>) 16);</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="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1DeviceMemoryReservation.html">DeviceMemoryReservation</a>(<span class="keyword">this</span>,</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a>,</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>.<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ab45d128f288728df5baf03defd50cec7">getAlloc</a>(size, stream),</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  size,</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  stream);</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> <span class="keywordtype">size_t</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a66e82485ab7a89be137f85a82ea94fd0"> 209</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a66e82485ab7a89be137f85a82ea94fd0">StackDeviceMemory::getSizeAvailable</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>.<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ac9fe1174255fedfee546bb5e37c12834">getSizeAvailable</a>();</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> std::string</div>
<div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ae4fab99808556307b17241c45503a4b0"> 214</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ae4fab99808556307b17241c45503a4b0">StackDeviceMemory::toString</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>.<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a1c91f4d50ecb8bb659054227d32fb47b">toString</a>();</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> <span class="keywordtype">size_t</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"><a class="line" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ad1659533968bccdb288b1682e7feb234"> 219</a></span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ad1659533968bccdb288b1682e7feb234">StackDeviceMemory::getHighWaterCudaMalloc</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">return</span> <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>.<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a88e877d2b63d6e3d828a37462e780004">getHighWaterCudaMalloc</a>();</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> }</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> StackDeviceMemory::returnAllocation(<a class="code" href="classfaiss_1_1gpu_1_1DeviceMemoryReservation.html">DeviceMemoryReservation</a>& m) {</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  FAISS_ASSERT(m.get());</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  FAISS_ASSERT(<a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">device_</a> == m.device());</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">stack_</a>.<a class="code" href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a5c652c126c2bf37149995cdb9d46a382">returnAlloc</a>((<span class="keywordtype">char</span>*) m.get(), m.size(), m.stream());</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> } } <span class="comment">// namespace</span></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_a9d9a5dcdb2d016cf00d14b8831db638b"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a9d9a5dcdb2d016cf00d14b8831db638b">faiss::gpu::StackDeviceMemory::getMemory</a></div><div class="ttdeci">DeviceMemoryReservation getMemory(cudaStream_t stream, size_t size) override</div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00196">StackDeviceMemory.cpp:196</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a88e877d2b63d6e3d828a37462e780004"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a88e877d2b63d6e3d828a37462e780004">faiss::gpu::StackDeviceMemory::Stack::getHighWaterCudaMalloc</a></div><div class="ttdeci">size_t getHighWaterCudaMalloc() const </div><div class="ttdoc">Returns the high-water mark of cudaMalloc activity. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00172">StackDeviceMemory.cpp:172</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a3df7ba513acd46aa69180585cb4e7aac"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a3df7ba513acd46aa69180585cb4e7aac">faiss::gpu::StackDeviceMemory::Stack::size_</a></div><div class="ttdeci">size_t size_</div><div class="ttdoc">Total size end_ - start_. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00097">StackDeviceMemory.h:97</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a783de9fc71cf57bf336c474f6155453d"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a783de9fc71cf57bf336c474f6155453d">faiss::gpu::StackDeviceMemory::Stack::Stack</a></div><div class="ttdeci">Stack(int device, size_t size)</div><div class="ttdoc">Constructor that allocates memory via cudaMalloc. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00021">StackDeviceMemory.cpp:21</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_a323a632f397eaf3df3034595762c6a29"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a323a632f397eaf3df3034595762c6a29">faiss::gpu::StackDeviceMemory::stack_</a></div><div class="ttdeci">Stack stack_</div><div class="ttdoc">Memory stack. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00122">StackDeviceMemory.h:122</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a5c652c126c2bf37149995cdb9d46a382"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a5c652c126c2bf37149995cdb9d46a382">faiss::gpu::StackDeviceMemory::Stack::returnAlloc</a></div><div class="ttdeci">void returnAlloc(char *p, size_t size, cudaStream_t stream)</div><div class="ttdoc">Returns an allocation. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00128">StackDeviceMemory.cpp:128</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a140d3dc4577883704708ecca493813ff"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a140d3dc4577883704708ecca493813ff">faiss::gpu::StackDeviceMemory::Stack::head_</a></div><div class="ttdeci">char * head_</div><div class="ttdoc">Stack head within [start, end) </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00100">StackDeviceMemory.h:100</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_a66e82485ab7a89be137f85a82ea94fd0"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a66e82485ab7a89be137f85a82ea94fd0">faiss::gpu::StackDeviceMemory::getSizeAvailable</a></div><div class="ttdeci">size_t getSizeAvailable() const override</div><div class="ttdoc">Returns the current size available without calling cudaMalloc. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00209">StackDeviceMemory.cpp:209</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_ac9fe1174255fedfee546bb5e37c12834"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ac9fe1174255fedfee546bb5e37c12834">faiss::gpu::StackDeviceMemory::Stack::getSizeAvailable</a></div><div class="ttdeci">size_t getSizeAvailable() const </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00059">StackDeviceMemory.cpp:59</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a0950e30ddd0008367a0fb109db9c01b9"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a0950e30ddd0008367a0fb109db9c01b9">faiss::gpu::StackDeviceMemory::Stack::device_</a></div><div class="ttdeci">int device_</div><div class="ttdoc">Device this allocation is on. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00086">StackDeviceMemory.h:86</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1DeviceScope_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1DeviceScope.html">faiss::gpu::DeviceScope</a></div><div class="ttdef"><b>Definition:</b> <a href="DeviceUtils_8h_source.html#l00055">DeviceUtils.h:55</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_ae4fab99808556307b17241c45503a4b0"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ae4fab99808556307b17241c45503a4b0">faiss::gpu::StackDeviceMemory::toString</a></div><div class="ttdeci">std::string toString() const override</div><div class="ttdoc">Returns a string containing our current memory manager state. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00214">StackDeviceMemory.cpp:214</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Range_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Range.html">faiss::gpu::StackDeviceMemory::Range</a></div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00049">StackDeviceMemory.h:49</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_a1c91f4d50ecb8bb659054227d32fb47b"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#a1c91f4d50ecb8bb659054227d32fb47b">faiss::gpu::StackDeviceMemory::Stack::toString</a></div><div class="ttdeci">std::string toString() const </div><div class="ttdoc">Returns the stack state. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00151">StackDeviceMemory.cpp:151</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_ad1659533968bccdb288b1682e7feb234"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ad1659533968bccdb288b1682e7feb234">faiss::gpu::StackDeviceMemory::getHighWaterCudaMalloc</a></div><div class="ttdeci">size_t getHighWaterCudaMalloc() const override</div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00219">StackDeviceMemory.cpp:219</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_ab45d128f288728df5baf03defd50cec7"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#ab45d128f288728df5baf03defd50cec7">faiss::gpu::StackDeviceMemory::Stack::getAlloc</a></div><div class="ttdeci">char * getAlloc(size_t size, cudaStream_t stream)</div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00064">StackDeviceMemory.cpp:64</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack_html_aed64654e7d498114fdd48a6f1cdb1aa2"><div class="ttname"><a href="structfaiss_1_1gpu_1_1StackDeviceMemory_1_1Stack.html#aed64654e7d498114fdd48a6f1cdb1aa2">faiss::gpu::StackDeviceMemory::Stack::start_</a></div><div class="ttdeci">char * start_</div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00093">StackDeviceMemory.h:93</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_ac54f49a3be6b7fe4f1fc70094075d875"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ac54f49a3be6b7fe4f1fc70094075d875">faiss::gpu::StackDeviceMemory::device_</a></div><div class="ttdeci">int device_</div><div class="ttdoc">Our device. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8h_source.html#l00119">StackDeviceMemory.h:119</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1DeviceMemoryReservation_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1DeviceMemoryReservation.html">faiss::gpu::DeviceMemoryReservation</a></div><div class="ttdef"><b>Definition:</b> <a href="DeviceMemory_8h_source.html#l00021">DeviceMemory.h:21</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_ab9dac6d8953630121f60fb804599f648"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#ab9dac6d8953630121f60fb804599f648">faiss::gpu::StackDeviceMemory::getDevice</a></div><div class="ttdeci">int getDevice() const override</div><div class="ttdoc">Returns the device we are managing memory for. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00191">StackDeviceMemory.cpp:191</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1StackDeviceMemory_html_a130f900c32ba91ae1f872c7ee506a93e"><div class="ttname"><a href="classfaiss_1_1gpu_1_1StackDeviceMemory.html#a130f900c32ba91ae1f872c7ee506a93e">faiss::gpu::StackDeviceMemory::StackDeviceMemory</a></div><div class="ttdeci">StackDeviceMemory(int device, size_t allocPerDevice)</div><div class="ttdoc">Allocate a new region of memory that we manage. </div><div class="ttdef"><b>Definition:</b> <a href="StackDeviceMemory_8cpp_source.html#l00176">StackDeviceMemory.cpp:176</a></div></div>
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