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<div class="title">device/tensor_compare.h</div> </div>
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<a href="device_2tensor__compare_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/***************************************************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2017-2019, NVIDIA CORPORATION. All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * provided that the following conditions are met:</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * * Redistributions of source code must retain the above copyright notice, this list of</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * conditions and the following disclaimer.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * * Redistributions in binary form must reproduce the above copyright notice, this list of</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * conditions and the following disclaimer in the documentation and/or other materials</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * provided with the distribution.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * to endorse or promote products derived from this software without specific prior written</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * permission.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> *</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> **************************************************************************************************/</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/* \file</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> \brief Defines host-side elementwise operations on TensorView.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">*/</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#pragma once</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// Standard Library includes</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// Cutlass includes</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "<a class="code" href="cutlass_8h.html">cutlass/cutlass.h</a>"</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "<a class="code" href="relatively__equal_8h.html">cutlass/relatively_equal.h</a>"</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "<a class="code" href="distribution_8h.html">cutlass/util/distribution.h</a>"</span></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> <span class="preprocessor">#include "<a class="code" href="device_2tensor__foreach_8h.html">tensor_foreach.h</a>"</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">namespace </span><a class="code" href="namespacecutlass.html">cutlass</a> {</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">namespace </span>reference {</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">namespace </span>device {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">namespace </span>kernel {</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> <span class="keyword">template</span> <<span class="keyword">typename</span> Element></div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a4595ede72eddace3c973c7f0f74b001d"> 50</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a4595ede72eddace3c973c7f0f74b001d">BlockCompareEqual</a>(</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">int</span> *equal, </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  Element <span class="keyword">const</span> *ptr_A,</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  Element <span class="keyword">const</span> *ptr_B,</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordtype">size_t</span> capacity) {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">size_t</span> idx = threadIdx.x + blockDim.x * blockIdx.x;</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="keywordflow">for</span> (; idx < capacity; idx += gridDim.x * blockDim.x) {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span> (ptr_A[idx] != ptr_B[idx]) {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  *equal = 0;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</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>  }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element></div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a6da13fb683d56d6973af0a97a4023677"> 67</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a6da13fb683d56d6973af0a97a4023677">BlockCompareRelativelyEqual</a>(</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> *equal, </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  Element <span class="keyword">const</span> *ptr_A,</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  Element <span class="keyword">const</span> *ptr_B,</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordtype">size_t</span> capacity,</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  Element epsilon,</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  Element nonzero_floor) {</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">size_t</span> idx = threadIdx.x + blockDim.x * blockIdx.x;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">for</span> (; idx < capacity; idx += gridDim.x * blockDim.x) {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  Element a = ptr_A[idx];</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  Element b = ptr_B[idx];</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacecutlass.html#aebc97e25721b38692159a6d50d545fe0">relatively_equal</a>(a, b, epsilon, nonzero_floor)) {</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  *equal = 0;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</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>  }</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="comment">// namespace kernel</span></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> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element></div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="namespacecutlass_1_1reference_1_1device.html#aad19927d67f15b89e66560cb77f2a813"> 96</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a4595ede72eddace3c973c7f0f74b001d">BlockCompareEqual</a>(</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  Element <span class="keyword">const</span> *ptr_A,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  Element <span class="keyword">const</span> *ptr_B,</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">size_t</span> capacity,</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">int</span> grid_size = 0, </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">int</span> block_size = 0) {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">int</span> equal_flag = 1;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">int</span> *device_equal_flag = <span class="keyword">nullptr</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>  <span class="keywordflow">if</span> (cudaMalloc((<span class="keywordtype">void</span> **)&device_equal_flag, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>)) != cudaSuccess) {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to allocate device flag."</span>);</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (cudaMemcpy(</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  device_equal_flag, </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  &equal_flag, </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  cudaMemcpyHostToDevice) != cudaSuccess) {</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>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to copy equality flag to device."</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> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (!grid_size || !block_size) {</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>  <span class="comment">// if grid_size or block_size are zero, query occupancy using the CUDA Occupancy API</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  cudaError_t result = cudaOccupancyMaxPotentialBlockSize(</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  &grid_size,</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  &block_size,</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  reinterpret_cast<void const *>(kernel::BlockCompareEqual<Element>));</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="keywordflow">if</span> (result != cudaSuccess) {</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to query occupancy."</span>);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</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>  <span class="comment">// Limit block size. This has the effect of increasing the number of items processed by a</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// single thread and reduces the impact of initialization overhead.</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  block_size = (block_size < 128 ? block_size : 128);</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> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  dim3 grid(grid_size, 1, 1);</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  dim3 block(block_size, 1, 1);</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  kernel::BlockCompareEqual<Element><<< grid, block >>>(device_equal_flag, ptr_A, ptr_B, capacity);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (cudaMemcpy(</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  &equal_flag, </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  device_equal_flag,</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  cudaMemcpyDeviceToHost) != cudaSuccess) {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  cudaFree(device_equal_flag);</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">throw</span> std::runtime_error(<span class="stringliteral">"Failed to copy equality flag from device."</span>);</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</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>  cudaFree(device_equal_flag);</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span> equal_flag;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> }</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element></div><div class="line"><a name="l00161"></a><span class="lineno"><a class="line" href="namespacecutlass_1_1reference_1_1device.html#a286d24a9faabc0be18f96e1069dca23e"> 161</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a6da13fb683d56d6973af0a97a4023677">BlockCompareRelativelyEqual</a>(</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  Element <span class="keyword">const</span> *ptr_A,</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  Element <span class="keyword">const</span> *ptr_B,</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">size_t</span> capacity,</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  Element epsilon,</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  Element nonzero_floor,</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordtype">int</span> grid_size = 0, </div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">int</span> block_size = 0) {</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>  <span class="keywordtype">int</span> equal_flag = 1;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">int</span> *device_equal_flag = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (cudaMalloc((<span class="keywordtype">void</span> **)&device_equal_flag, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>)) != cudaSuccess) {</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to allocate device flag."</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"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">if</span> (cudaMemcpy(</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  device_equal_flag, </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  &equal_flag, </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  cudaMemcpyHostToDevice) != cudaSuccess) {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to copy equality flag to device."</span>);</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> (!grid_size || !block_size) {</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">// if grid_size or block_size are zero, query occupancy using the CUDA Occupancy API</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  cudaError_t result = cudaOccupancyMaxPotentialBlockSize(</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  &grid_size,</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  &block_size,</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  reinterpret_cast<void const *>(kernel::BlockCompareRelativelyEqual<Element>));</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> (result != cudaSuccess) {</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to query occupancy."</span>);</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// Limit block size. This has the effect of increasing the number of items processed by a</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// single thread and reduces the impact of initialization overhead.</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  block_size = (block_size < 128 ? block_size : 128);</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  dim3 grid(grid_size, 1, 1);</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  dim3 block(block_size, 1, 1);</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  kernel::BlockCompareRelativelyEqual<Element><<< grid, block >>>(</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  device_equal_flag, </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  ptr_A, </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  ptr_B, </div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  capacity, </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  epsilon, </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  nonzero_floor</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  );</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">if</span> (cudaMemcpy(</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  &equal_flag, </div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  device_equal_flag,</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), </div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  cudaMemcpyDeviceToHost) != cudaSuccess) {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  </div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  cudaFree(device_equal_flag);</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="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Failed to copy equality flag from device."</span>);</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  cudaFree(device_equal_flag);</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>  <span class="keywordflow">return</span> equal_flag;</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="l00232"></a><span class="lineno"> 232</span> </div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> } <span class="comment">// device</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> } <span class="comment">// reference</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> } <span class="comment">// cutlass</span></div><div class="ttc" id="namespacecutlass_html"><div class="ttname"><a href="namespacecutlass.html">cutlass</a></div><div class="ttdef"><b>Definition:</b> aligned_buffer.h:35</div></div>
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<div class="ttc" id="namespacecutlass_1_1reference_1_1device_1_1kernel_html_a6da13fb683d56d6973af0a97a4023677"><div class="ttname"><a href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a6da13fb683d56d6973af0a97a4023677">cutlass::reference::device::kernel::BlockCompareRelativelyEqual</a></div><div class="ttdeci">__global__ void BlockCompareRelativelyEqual(int *equal, Element const *ptr_A, Element const *ptr_B, size_t capacity, Element epsilon, Element nonzero_floor)</div><div class="ttdef"><b>Definition:</b> device/tensor_compare.h:67</div></div>
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<div class="ttc" id="namespacecutlass_html_aebc97e25721b38692159a6d50d545fe0"><div class="ttname"><a href="namespacecutlass.html#aebc97e25721b38692159a6d50d545fe0">cutlass::relatively_equal</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE bool relatively_equal(T a, T b, T epsilon, T nonzero_floor)</div></div>
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<div class="ttc" id="device_2tensor__foreach_8h_html"><div class="ttname"><a href="device_2tensor__foreach_8h.html">tensor_foreach.h</a></div></div>
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<div class="ttc" id="relatively__equal_8h_html"><div class="ttname"><a href="relatively__equal_8h.html">relatively_equal.h</a></div></div>
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<div class="ttc" id="namespacecutlass_1_1reference_1_1device_1_1kernel_html_a4595ede72eddace3c973c7f0f74b001d"><div class="ttname"><a href="namespacecutlass_1_1reference_1_1device_1_1kernel.html#a4595ede72eddace3c973c7f0f74b001d">cutlass::reference::device::kernel::BlockCompareEqual</a></div><div class="ttdeci">__global__ void BlockCompareEqual(int *equal, Element const *ptr_A, Element const *ptr_B, size_t capacity)</div><div class="ttdef"><b>Definition:</b> device/tensor_compare.h:50</div></div>
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<div class="ttc" id="distribution_8h_html"><div class="ttname"><a href="distribution_8h.html">distribution.h</a></div><div class="ttdoc">This header contains a class to parametrize a statistical distribution function. </div></div>
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<div class="ttc" id="cutlass_8h_html"><div class="ttname"><a href="cutlass_8h.html">cutlass.h</a></div><div class="ttdoc">Basic include for CUTLASS. </div></div>
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