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<li class="navelem"><a class="el" href="dir_20697b8f204bdfcab31e6b1a416f3ab8.html">caffe2</a></li><li class="navelem"><a class="el" href="dir_78eec69ac3a4b32ad49d9e5fc7146850.html">core</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#include "caffe2/core/common_gpu.h"</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor">#include <atomic></span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include <cstdlib></span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <sstream></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "caffe2/core/asan.h"</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "caffe2/core/common.h"</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "caffe2/core/init.h"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "caffe2/core/logging.h"</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> CAFFE2_DEFINE_bool(</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  caffe2_cuda_full_device_control,</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="keyword">false</span>,</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="stringliteral">"If true, assume all the cudaSetDevice and cudaGetDevice calls will be "</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="stringliteral">"controlled by Caffe2, and non-Caffe2 code will ensure that the entry and "</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="stringliteral">"exit point has the same cuda device. Under the hood, Caffe2 will use "</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="stringliteral">"thread local variables to cache the device, in order to speed up set and "</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="stringliteral">"get device calls. This is an experimental feature that may have non "</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="stringliteral">"trivial side effects, so use it with care and only enable it if you are "</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="stringliteral">"absolutely sure. Also, this flag should not be changed after the program "</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="stringliteral">"initializes."</span>);</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">namespace </span><a class="code" href="namespacecaffe2.html">caffe2</a> {</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329"> 26</a></span> <span class="keywordtype">int</span> <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>() {</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">if</span> (getenv(<span class="stringliteral">"CAFFE2_DEBUG_CUDA_INIT_ORDER"</span>)) {</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> first = <span class="keyword">true</span>;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (first) {</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  first = <span class="keyword">false</span>;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  std::cerr << <span class="stringliteral">"DEBUG: caffe2::NumCudaDevices() invoked for the first time"</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  << std::endl;</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</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>  <span class="keyword">static</span> <span class="keywordtype">int</span> count = -1;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">if</span> (count < 0) {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">auto</span> err = cudaGetDeviceCount(&count);</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">switch</span> (err) {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">case</span> cudaSuccess:</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Everything is good.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">case</span> cudaErrorNoDevice:</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  count = 0;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">case</span> cudaErrorInsufficientDriver:</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  LOG(WARNING) << <span class="stringliteral">"Insufficient cuda driver. Cannot use cuda."</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  count = 0;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">case</span> cudaErrorInitializationError:</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  LOG(WARNING) << <span class="stringliteral">"Cuda driver initialization failed, you might not "</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="stringliteral">"have a cuda gpu."</span>;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  count = 0;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">case</span> cudaErrorUnknown:</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  LOG(ERROR) << <span class="stringliteral">"Found an unknown error - this may be due to an "</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="stringliteral">"incorrectly set up environment, e.g. changing env "</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="stringliteral">"variable CUDA_VISIBLE_DEVICES after program start. "</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="stringliteral">"I will set the available devices to be zero."</span>;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  count = 0;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">case</span> cudaErrorMemoryAllocation:</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#if CAFFE2_ASAN_ENABLED</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// In ASAN mode, we know that a cudaErrorMemoryAllocation error will</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// pop up.</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  LOG(ERROR) << <span class="stringliteral">"It is known that CUDA does not work well with ASAN. As "</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="stringliteral">"a result we will simply shut down CUDA support. If you "</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="stringliteral">"would like to use GPUs, turn off ASAN."</span>;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  count = 0;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#else // CAFFE2_ASAN_ENABLED</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// If we are not in ASAN mode and we get cudaErrorMemoryAllocation,</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// this means that something is wrong before NumCudaDevices() call.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  LOG(FATAL) << <span class="stringliteral">"Unexpected error from cudaGetDeviceCount(). Did you run "</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="stringliteral">"some cuda functions before calling NumCudaDevices() "</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="stringliteral">"that might have already set an error? Error: "</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  << err;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif // CAFFE2_ASAN_ENABLED</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  LOG(FATAL) << <span class="stringliteral">"Unexpected error from cudaGetDeviceCount(). Did you run "</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="stringliteral">"some cuda functions before calling NumCudaDevices() "</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="stringliteral">"that might have already set an error? Error: "</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  << err;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  }</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>  <span class="keywordflow">return</span> count;</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> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keywordtype">int</span> gDefaultGPUID = 0;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">// Only used when FLAGS_caffe2_cuda_full_device_control is set true.</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> thread_local <span class="keywordtype">int</span> gCurrentDevice = -1;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keywordtype">void</span> SetDefaultGPUID(<span class="keyword">const</span> <span class="keywordtype">int</span> deviceid) {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  CAFFE_ENFORCE_LT(</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  deviceid,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>(),</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="stringliteral">"The default gpu id should be smaller than the number of gpus "</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="stringliteral">"on this machine: "</span>,</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  deviceid,</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="stringliteral">" vs "</span>,</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>());</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  gDefaultGPUID = deviceid;</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="keywordtype">int</span> GetDefaultGPUID() { <span class="keywordflow">return</span> gDefaultGPUID; }</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#af6850a4a5f4298a5c825238cfb0de688"> 109</a></span> <span class="keywordtype">int</span> <a class="code" href="namespacecaffe2.html#af6850a4a5f4298a5c825238cfb0de688">CaffeCudaGetDevice</a>() {</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (FLAGS_caffe2_cuda_full_device_control) {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">if</span> (gCurrentDevice < 0) {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  CUDA_ENFORCE(cudaGetDevice(&gCurrentDevice));</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> gCurrentDevice;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordtype">int</span> gpu_id = 0;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  CUDA_ENFORCE(cudaGetDevice(&gpu_id));</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">return</span> gpu_id;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</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"><a class="line" href="namespacecaffe2.html#aff145698c872153a4e117f0e2101f09a"> 122</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacecaffe2.html#aff145698c872153a4e117f0e2101f09a">CaffeCudaSetDevice</a>(<span class="keyword">const</span> <span class="keywordtype">int</span> <span class="keywordtype">id</span>) {</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (FLAGS_caffe2_cuda_full_device_control) {</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (gCurrentDevice != <span class="keywordtype">id</span>) {</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  CUDA_ENFORCE(cudaSetDevice(<span class="keywordtype">id</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>  gCurrentDevice = id;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  CUDA_ENFORCE(cudaSetDevice(<span class="keywordtype">id</span>));</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> }</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#a47fded6ff24bcf074e5c78701ebe70f2"> 133</a></span> <span class="keywordtype">int</span> <a class="code" href="namespacecaffe2.html#a47fded6ff24bcf074e5c78701ebe70f2">GetGPUIDForPointer</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* ptr) {</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  cudaPointerAttributes attr;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  cudaError_t err = cudaPointerGetAttributes(&attr, ptr);</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">if</span> (err == cudaErrorInvalidValue) {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="comment">// Occurs when the pointer is in the CPU address space that is</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="comment">// unmanaged by CUDA; make sure the last error state is cleared,</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// since it is persistent</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  err = cudaGetLastError();</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  CHECK(err == cudaErrorInvalidValue);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> -1;</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> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// Otherwise, there must be no error</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  CUDA_ENFORCE(err);</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>  <span class="keywordflow">if</span> (attr.memoryType == cudaMemoryTypeHost) {</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</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>  <span class="keywordflow">return</span> attr.device;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div><div class="line"><a name="l00156"></a><span class="lineno"><a class="line" href="structcaffe2_1_1_cuda_device_prop_wrapper.html"> 156</a></span> <span class="keyword">struct </span><a class="code" href="structcaffe2_1_1_cuda_device_prop_wrapper.html">CudaDevicePropWrapper</a> {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <a class="code" href="structcaffe2_1_1_cuda_device_prop_wrapper.html">CudaDevicePropWrapper</a>() : props(<a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>()) {</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>(); ++i) {</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  CUDA_ENFORCE(cudaGetDeviceProperties(&props[i], i));</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>  }</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  vector<cudaDeviceProp> props;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> };</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div><div class="line"><a name="l00166"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#ad461b286b4d2322c82a6f43fa00c8034"> 166</a></span> <span class="keyword">const</span> cudaDeviceProp& <a class="code" href="namespacecaffe2.html#ad461b286b4d2322c82a6f43fa00c8034">GetDeviceProperty</a>(<span class="keyword">const</span> <span class="keywordtype">int</span> deviceid) {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// According to C++11 standard section 6.7, static local variable init is</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="comment">// thread safe. See</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">// https://stackoverflow.com/questions/8102125/is-local-static-variable-initialization-thread-safe-in-c11</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">// for details.</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keyword">static</span> <a class="code" href="structcaffe2_1_1_cuda_device_prop_wrapper.html">CudaDevicePropWrapper</a> props;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  CAFFE_ENFORCE_LT(</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  deviceid,</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>(),</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="stringliteral">"The gpu id should be smaller than the number of gpus "</span>,</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="stringliteral">"on this machine: "</span>,</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  deviceid,</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="stringliteral">" vs "</span>,</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <a class="code" href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">NumCudaDevices</a>());</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> props.props[deviceid];</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> </div><div class="line"><a name="l00183"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#adc3575c7b3b60d12fd9323082093708d"> 183</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacecaffe2.html#adc3575c7b3b60d12fd9323082093708d">DeviceQuery</a>(<span class="keyword">const</span> <span class="keywordtype">int</span> device) {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">const</span> cudaDeviceProp& prop = <a class="code" href="namespacecaffe2.html#ad461b286b4d2322c82a6f43fa00c8034">GetDeviceProperty</a>(device);</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  std::stringstream ss;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  ss << std::endl;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  ss << <span class="stringliteral">"Device id: "</span> << device << std::endl;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  ss << <span class="stringliteral">"Major revision number: "</span> << prop.major << std::endl;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  ss << <span class="stringliteral">"Minor revision number: "</span> << prop.minor << std::endl;</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  ss << <span class="stringliteral">"Name: "</span> << prop.name << std::endl;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  ss << <span class="stringliteral">"Total global memory: "</span> << prop.totalGlobalMem << std::endl;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  ss << <span class="stringliteral">"Total shared memory per block: "</span> << prop.sharedMemPerBlock</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  << std::endl;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  ss << <span class="stringliteral">"Total registers per block: "</span> << prop.regsPerBlock << std::endl;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  ss << <span class="stringliteral">"Warp size: "</span> << prop.warpSize << std::endl;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  ss << <span class="stringliteral">"Maximum memory pitch: "</span> << prop.memPitch << std::endl;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  ss << <span class="stringliteral">"Maximum threads per block: "</span> << prop.maxThreadsPerBlock</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  << std::endl;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  ss << <span class="stringliteral">"Maximum dimension of block: "</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  << prop.maxThreadsDim[0] << <span class="stringliteral">", "</span> << prop.maxThreadsDim[1] << <span class="stringliteral">", "</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  << prop.maxThreadsDim[2] << std::endl;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  ss << <span class="stringliteral">"Maximum dimension of grid: "</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  << prop.maxGridSize[0] << <span class="stringliteral">", "</span> << prop.maxGridSize[1] << <span class="stringliteral">", "</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  << prop.maxGridSize[2] << std::endl;</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  ss << <span class="stringliteral">"Clock rate: "</span> << prop.clockRate << std::endl;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ss << <span class="stringliteral">"Total constant memory: "</span> << prop.totalConstMem << std::endl;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  ss << <span class="stringliteral">"Texture alignment: "</span> << prop.textureAlignment << std::endl;</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  ss << <span class="stringliteral">"Concurrent copy and execution: "</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  << (prop.deviceOverlap ? <span class="stringliteral">"Yes"</span> : <span class="stringliteral">"No"</span>) << std::endl;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  ss << <span class="stringliteral">"Number of multiprocessors: "</span> << prop.multiProcessorCount</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  << std::endl;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  ss << <span class="stringliteral">"Kernel execution timeout: "</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  << (prop.kernelExecTimeoutEnabled ? <span class="stringliteral">"Yes"</span> : <span class="stringliteral">"No"</span>) << std::endl;</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  LOG(INFO) << ss.str();</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span>;</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"><a class="line" href="namespacecaffe2.html#a446da244aca2a8c6808963912cd5cdfc"> 218</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespacecaffe2.html#a446da244aca2a8c6808963912cd5cdfc">GetCudaPeerAccessPattern</a>(vector<vector<bool> >* pattern) {</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordtype">int</span> gpu_count;</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span> (cudaGetDeviceCount(&gpu_count) != cudaSuccess) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  pattern->clear();</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  pattern->resize(gpu_count, vector<bool>(gpu_count, <span class="keyword">false</span>));</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < gpu_count; ++i) {</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < gpu_count; ++j) {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordtype">int</span> can_access = <span class="keyword">true</span>;</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">if</span> (i != j) {</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (cudaDeviceCanAccessPeer(&can_access, i, j)</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  != cudaSuccess) {</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">return</span> <span class="keyword">false</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>  }</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  (*pattern)[i][j] = <span class="keyword">static_cast<</span><span class="keywordtype">bool</span><span class="keyword">></span>(can_access);</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</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>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#ac9185fa7304a1a5553a05fee40830c43"> 238</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespacecaffe2.html#ac9185fa7304a1a5553a05fee40830c43">TensorCoreAvailable</a>() {</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// requires CUDA 9.0 and above</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="preprocessor">#if CUDA_VERSION < 9000</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordtype">int</span> device = <a class="code" href="namespacecaffe2.html#af6850a4a5f4298a5c825238cfb0de688">CaffeCudaGetDevice</a>();</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">auto</span>& prop = <a class="code" href="namespacecaffe2.html#ad461b286b4d2322c82a6f43fa00c8034">GetDeviceProperty</a>(device);</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">return</span> prop.major >= 7;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> }</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#ab643532704982b9c6cd53fefb8c9015d"> 250</a></span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespacecaffe2.html#ab643532704982b9c6cd53fefb8c9015d">cublasGetErrorString</a>(cublasStatus_t error) {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">switch</span> (error) {</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_SUCCESS:</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_SUCCESS"</span>;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_NOT_INITIALIZED:</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_NOT_INITIALIZED"</span>;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_ALLOC_FAILED:</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_ALLOC_FAILED"</span>;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_INVALID_VALUE:</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_INVALID_VALUE"</span>;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_ARCH_MISMATCH:</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_ARCH_MISMATCH"</span>;</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_MAPPING_ERROR:</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_MAPPING_ERROR"</span>;</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_EXECUTION_FAILED:</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_EXECUTION_FAILED"</span>;</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_INTERNAL_ERROR:</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_INTERNAL_ERROR"</span>;</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="preprocessor">#if CUDA_VERSION >= 6000</span></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_NOT_SUPPORTED:</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_NOT_SUPPORTED"</span>;</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="preprocessor">#if CUDA_VERSION >= 6050</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">case</span> CUBLAS_STATUS_LICENSE_ERROR:</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CUBLAS_STATUS_LICENSE_ERROR"</span>;</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor">#endif // CUDA_VERSION >= 6050</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="preprocessor">#endif // CUDA_VERSION >= 6000</span></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="comment">// To suppress compiler warning.</span></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">return</span> <span class="stringliteral">"Unrecognized cublas error string"</span>;</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> }</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"><a class="line" href="namespacecaffe2.html#a8cd40a0417e6ec30c62f7fb8b49aa031"> 281</a></span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespacecaffe2.html#a8cd40a0417e6ec30c62f7fb8b49aa031">curandGetErrorString</a>(curandStatus_t error) {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">switch</span> (error) {</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">case</span> CURAND_STATUS_SUCCESS:</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_SUCCESS"</span>;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">case</span> CURAND_STATUS_VERSION_MISMATCH:</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_VERSION_MISMATCH"</span>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">case</span> CURAND_STATUS_NOT_INITIALIZED:</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_NOT_INITIALIZED"</span>;</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">case</span> CURAND_STATUS_ALLOCATION_FAILED:</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_ALLOCATION_FAILED"</span>;</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">case</span> CURAND_STATUS_TYPE_ERROR:</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_TYPE_ERROR"</span>;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">case</span> CURAND_STATUS_OUT_OF_RANGE:</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_OUT_OF_RANGE"</span>;</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">case</span> CURAND_STATUS_LENGTH_NOT_MULTIPLE:</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_LENGTH_NOT_MULTIPLE"</span>;</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">case</span> CURAND_STATUS_DOUBLE_PRECISION_REQUIRED:</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_DOUBLE_PRECISION_REQUIRED"</span>;</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">case</span> CURAND_STATUS_LAUNCH_FAILURE:</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_LAUNCH_FAILURE"</span>;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">case</span> CURAND_STATUS_PREEXISTING_FAILURE:</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_PREEXISTING_FAILURE"</span>;</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">case</span> CURAND_STATUS_INITIALIZATION_FAILED:</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_INITIALIZATION_FAILED"</span>;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">case</span> CURAND_STATUS_ARCH_MISMATCH:</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_ARCH_MISMATCH"</span>;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">case</span> CURAND_STATUS_INTERNAL_ERROR:</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">return</span> <span class="stringliteral">"CURAND_STATUS_INTERNAL_ERROR"</span>;</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">// To suppress compiler warning.</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">return</span> <span class="stringliteral">"Unrecognized curand error string"</span>;</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> </div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment">// Turn on the flag g_caffe2_has_cuda_linked to true for HasCudaRuntime()</span></div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment">// function.</span></div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="keyword">class </span>CudaRuntimeFlagFlipper {</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  CudaRuntimeFlagFlipper() {</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  internal::SetCudaRuntimeFlag();</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  }</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> };</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="keyword">static</span> CudaRuntimeFlagFlipper g_flipper;</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span> } <span class="comment">// namespace caffe2</span></div><div class="ttc" id="namespacecaffe2_html_adc3575c7b3b60d12fd9323082093708d"><div class="ttname"><a href="namespacecaffe2.html#adc3575c7b3b60d12fd9323082093708d">caffe2::DeviceQuery</a></div><div class="ttdeci">void DeviceQuery(const int device)</div><div class="ttdoc">Runs a device query function and prints out the results to LOG(INFO). </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00183">common_gpu.cc:183</a></div></div>
<div class="ttc" id="namespacecaffe2_html_a446da244aca2a8c6808963912cd5cdfc"><div class="ttname"><a href="namespacecaffe2.html#a446da244aca2a8c6808963912cd5cdfc">caffe2::GetCudaPeerAccessPattern</a></div><div class="ttdeci">bool GetCudaPeerAccessPattern(vector< vector< bool > > *pattern)</div><div class="ttdoc">Return a peer access pattern by returning a matrix (in the format of a nested vector) of boolean valu...</div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00218">common_gpu.cc:218</a></div></div>
<div class="ttc" id="namespacecaffe2_html_a6d0dba0f4c170fc7d3c588d1e57b8329"><div class="ttname"><a href="namespacecaffe2.html#a6d0dba0f4c170fc7d3c588d1e57b8329">caffe2::NumCudaDevices</a></div><div class="ttdeci">int NumCudaDevices()</div><div class="ttdoc">Returns the number of devices. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00026">common_gpu.cc:26</a></div></div>
<div class="ttc" id="namespacecaffe2_html"><div class="ttname"><a href="namespacecaffe2.html">caffe2</a></div><div class="ttdoc">A global dictionary that holds information about what Caffe2 modules have been loaded in the current ...</div><div class="ttdef"><b>Definition:</b> <a href="convert__encoded__to__raw__leveldb_8cc_source.html#l00047">convert_encoded_to_raw_leveldb.cc:47</a></div></div>
<div class="ttc" id="namespacecaffe2_html_a47fded6ff24bcf074e5c78701ebe70f2"><div class="ttname"><a href="namespacecaffe2.html#a47fded6ff24bcf074e5c78701ebe70f2">caffe2::GetGPUIDForPointer</a></div><div class="ttdeci">int GetGPUIDForPointer(const void *ptr)</div><div class="ttdoc">Gets the GPU id that the current pointer is located at. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00133">common_gpu.cc:133</a></div></div>
<div class="ttc" id="namespacecaffe2_html_af6850a4a5f4298a5c825238cfb0de688"><div class="ttname"><a href="namespacecaffe2.html#af6850a4a5f4298a5c825238cfb0de688">caffe2::CaffeCudaGetDevice</a></div><div class="ttdeci">int CaffeCudaGetDevice()</div><div class="ttdoc">Gets the current GPU id. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00109">common_gpu.cc:109</a></div></div>
<div class="ttc" id="namespacecaffe2_html_aff145698c872153a4e117f0e2101f09a"><div class="ttname"><a href="namespacecaffe2.html#aff145698c872153a4e117f0e2101f09a">caffe2::CaffeCudaSetDevice</a></div><div class="ttdeci">void CaffeCudaSetDevice(const int id)</div><div class="ttdoc">Gets the current GPU id. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00122">common_gpu.cc:122</a></div></div>
<div class="ttc" id="namespacecaffe2_html_ad461b286b4d2322c82a6f43fa00c8034"><div class="ttname"><a href="namespacecaffe2.html#ad461b286b4d2322c82a6f43fa00c8034">caffe2::GetDeviceProperty</a></div><div class="ttdeci">const cudaDeviceProp & GetDeviceProperty(const int deviceid)</div><div class="ttdoc">Gets the device property for the given device. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00166">common_gpu.cc:166</a></div></div>
<div class="ttc" id="namespacecaffe2_html_a8cd40a0417e6ec30c62f7fb8b49aa031"><div class="ttname"><a href="namespacecaffe2.html#a8cd40a0417e6ec30c62f7fb8b49aa031">caffe2::curandGetErrorString</a></div><div class="ttdeci">const char * curandGetErrorString(curandStatus_t error)</div><div class="ttdoc">Return a human readable curand error string. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00281">common_gpu.cc:281</a></div></div>
<div class="ttc" id="namespacecaffe2_html_ab643532704982b9c6cd53fefb8c9015d"><div class="ttname"><a href="namespacecaffe2.html#ab643532704982b9c6cd53fefb8c9015d">caffe2::cublasGetErrorString</a></div><div class="ttdeci">const char * cublasGetErrorString(cublasStatus_t error)</div><div class="ttdoc">Return a human readable cublas error string. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00250">common_gpu.cc:250</a></div></div>
<div class="ttc" id="structcaffe2_1_1_cuda_device_prop_wrapper_html"><div class="ttname"><a href="structcaffe2_1_1_cuda_device_prop_wrapper.html">caffe2::CudaDevicePropWrapper</a></div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00156">common_gpu.cc:156</a></div></div>
<div class="ttc" id="namespacecaffe2_html_ac9185fa7304a1a5553a05fee40830c43"><div class="ttname"><a href="namespacecaffe2.html#ac9185fa7304a1a5553a05fee40830c43">caffe2::TensorCoreAvailable</a></div><div class="ttdeci">bool TensorCoreAvailable()</div><div class="ttdoc">Return the availability of TensorCores for math. </div><div class="ttdef"><b>Definition:</b> <a href="common__gpu_8cc_source.html#l00238">common_gpu.cc:238</a></div></div>
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