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<a href="amgxsolver_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright (c) 2010-2025, Lawrence Livermore National Security, LLC. Produced</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// at the Lawrence Livermore National Laboratory. All Rights reserved. See files</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// LICENSE and NOTICE for details. LLNL-CODE-806117.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">//</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">// This file is part of the MFEM library. For more information and source code</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// availability visit https://mfem.org.</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// MFEM is free software; you can redistribute it and/or modify it under the</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// terms of the BSD-3 license. We welcome feedback and contributions, see file</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// CONTRIBUTING.md for details.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// Implementation of the MFEM wrapper for Nvidia's multigrid library, AmgX</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment">//</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment">// This work is partially based on:</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment">//</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment">// Pi-Yueh Chuang and Lorena A. Barba (2017).</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment">// AmgXWrapper: An interface between PETSc and the NVIDIA AmgX library.</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment">// J. Open Source Software, 2(16):280, doi:10.21105/joss.00280</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment">//</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="comment">// See https://github.com/barbagroup/AmgXWrapper.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include "<a class="code" href="config_8hpp.html">../config/config.hpp</a>"</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include "<a class="code" href="amgxsolver_8hpp.html">amgxsolver.hpp</a>"</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#ifdef MFEM_USE_AMGX</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#ifdef MFEM_USE_MPI</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include "<a class="code" href="communication_8hpp.html">../general/communication.hpp</a>"</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacemfem.html">mfem</a></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span>{</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="keywordtype">int</span> AmgXSolver::count = 0;</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span>AMGX_resources_handle AmgXSolver::rsrc = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="foldopen" id="foldopen00037" data-start="{" data-end="}">
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#aed974448d0c033b937e1401959eeacd7"> 37</a></span><a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aed974448d0c033b937e1401959eeacd7">AmgXSolver::AmgXSolver</a>()</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> : ConvergenceCheck(false) {};</div>
</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="foldopen" id="foldopen00040" data-start="{" data-end="}">
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#a28439b5b57b2b79406defeed890f2299"> 40</a></span><a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aed974448d0c033b937e1401959eeacd7">AmgXSolver::AmgXSolver</a>(<span class="keyword">const</span> <a class="code hl_enumeration" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752c">AMGX_MODE</a> amgxMode_, <span class="keyword">const</span> <span class="keywordtype">bool</span> verbose)</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span>{</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> amgxMode = amgxMode_;</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">if</span> (amgxMode == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752cae833eebaaef842ff2639069ec568b2c7">AmgXSolver::SOLVER</a>) { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">true</span>;}</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">else</span> { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">false</span>;}</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a5e521c91e81fe2e883608d9e1976c7a5">DefaultParameters</a>(amgxMode, verbose);</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a796f9fc1771f96a4e7a04241014d4095">InitSerial</a>();</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span>}</div>
</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="preprocessor">#ifdef MFEM_USE_MPI</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="foldopen" id="foldopen00054" data-start="{" data-end="}">
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#aa8b381ba9adf161ba2657632c5cbbe17"> 54</a></span><a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aed974448d0c033b937e1401959eeacd7">AmgXSolver::AmgXSolver</a>(<span class="keyword">const</span> MPI_Comm &comm,</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752c">AMGX_MODE</a> amgxMode_, <span class="keyword">const</span> <span class="keywordtype">bool</span> verbose)</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span>{</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> std::string config;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> amgxMode = amgxMode_;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">if</span> (amgxMode == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752cae833eebaaef842ff2639069ec568b2c7">AmgXSolver::SOLVER</a>) { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">true</span>;}</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">else</span> { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">false</span>;}</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a5e521c91e81fe2e883608d9e1976c7a5">DefaultParameters</a>(amgxMode, verbose);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#ae94c512c1587e04ea421fa68af9df3a5">InitExclusiveGPU</a>(comm);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span>}</div>
</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="foldopen" id="foldopen00068" data-start="{" data-end="}">
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#af9bde426db5079bad3e1afd406f20d99"> 68</a></span><a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aed974448d0c033b937e1401959eeacd7">AmgXSolver::AmgXSolver</a>(<span class="keyword">const</span> MPI_Comm &comm, <span class="keyword">const</span> <span class="keywordtype">int</span> nDevs,</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752c">AMGX_MODE</a> amgxMode_, <span class="keyword">const</span> <span class="keywordtype">bool</span> verbose)</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span>{</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> std::string config;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> amgxMode = amgxMode_;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">if</span> (amgxMode == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752cae833eebaaef842ff2639069ec568b2c7">AmgXSolver::SOLVER</a>) { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">true</span>;}</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keywordflow">else</span> { <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = <span class="keyword">false</span>;}</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a5e521c91e81fe2e883608d9e1976c7a5">DefaultParameters</a>(amgxMode_, verbose);</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aa7b9914286b7df6144e9c5c01bae52dd">InitMPITeams</a>(comm, nDevs);</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span>}</div>
</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="foldopen" id="foldopen00084" data-start="{" data-end="}">
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#a62817c3f75f4a82320109a0e41c7c3a9"> 84</a></span><a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a62817c3f75f4a82320109a0e41c7c3a9">AmgXSolver::~AmgXSolver</a>()</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span>{</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordflow">if</span> (isInitialized) { <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a14c1e13d205932df6677b30611db747a">Finalize</a>(); }</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span>}</div>
</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div>
<div class="foldopen" id="foldopen00089" data-start="{" data-end="}">
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#a796f9fc1771f96a4e7a04241014d4095"> 89</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a796f9fc1771f96a4e7a04241014d4095">AmgXSolver::InitSerial</a>()</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span>{</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> count++;</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> mpi_gpu_mode = <span class="stringliteral">"serial"</span>;</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> AMGX_SAFE_CALL(AMGX_initialize());</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> AMGX_SAFE_CALL(AMGX_initialize_plugins());</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> </div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> AMGX_SAFE_CALL(AMGX_install_signal_handler());</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> </div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> MFEM_VERIFY(configSrc != <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7a8992692012c523ccbaf88e41c2524588">CONFIG_SRC::UNDEFINED</a>,</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="stringliteral">"AmgX configuration is not defined \n"</span>);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">if</span> (configSrc == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7a0ccf63c071b521277393fcaf498a8633">CONFIG_SRC::EXTERNAL</a>)</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> {</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> AMGX_SAFE_CALL(AMGX_config_create_from_file(&cfg, amgx_config.c_str()));</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> }</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> AMGX_SAFE_CALL(AMGX_config_create(&cfg, amgx_config.c_str()));</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> }</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> AMGX_SAFE_CALL(AMGX_resources_create_simple(&rsrc, cfg));</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> AMGX_SAFE_CALL(AMGX_solver_create(&solver, rsrc, precision_mode, cfg));</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> AMGX_SAFE_CALL(AMGX_matrix_create(&AmgXA, rsrc, precision_mode));</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> AMGX_SAFE_CALL(AMGX_vector_create(&AmgXP, rsrc, precision_mode));</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> AMGX_SAFE_CALL(AMGX_vector_create(&AmgXRHS, rsrc, precision_mode));</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> isInitialized = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span>}</div>
</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> </div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span><span class="preprocessor">#ifdef MFEM_USE_MPI</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> </div>
<div class="foldopen" id="foldopen00124" data-start="{" data-end="}">
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#ae94c512c1587e04ea421fa68af9df3a5"> 124</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#ae94c512c1587e04ea421fa68af9df3a5">AmgXSolver::InitExclusiveGPU</a>(<span class="keyword">const</span> MPI_Comm &comm)</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span>{</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// If this instance has already been initialized, skip</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">if</span> (isInitialized)</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <a class="code hl_function" href="namespacemfem.html#a2a32aaca3e6d73a0dc6ca11de559c7e0">mfem_error</a>(<span class="stringliteral">"This AmgXSolver instance has been initialized on this process."</span>);</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> }</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="comment">// Note that every MPI rank may talk to a GPU</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> mpi_gpu_mode = <span class="stringliteral">"mpi-gpu-exclusive"</span>;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> gpuProc = 0;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// Increment number of AmgX instances</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> count++;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> MPI_Comm_dup(comm, &gpuWorld);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> MPI_Comm_size(gpuWorld, &gpuWorldSize);</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> MPI_Comm_rank(gpuWorld, &myGpuWorldRank);</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// Each rank will only see 1 device call it device 0</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> nDevs = 1, devID = 0;</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> InitAmgX();</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> isInitialized = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span>}</div>
</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> </div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="comment">// Initialize for MPI ranks > GPUs, all devices are visible to all of the MPI</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="comment">// ranks</span></div>
<div class="foldopen" id="foldopen00153" data-start="{" data-end="}">
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#aa7b9914286b7df6144e9c5c01bae52dd"> 153</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aa7b9914286b7df6144e9c5c01bae52dd">AmgXSolver::InitMPITeams</a>(<span class="keyword">const</span> MPI_Comm &comm,</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">const</span> <span class="keywordtype">int</span> nDevs)</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span>{</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// If this instance has already been initialized, skip</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordflow">if</span> (isInitialized)</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> {</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <a class="code hl_function" href="namespacemfem.html#a2a32aaca3e6d73a0dc6ca11de559c7e0">mfem_error</a>(<span class="stringliteral">"This AmgXSolver instance has been initialized on this process."</span>);</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> }</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> mpi_gpu_mode = <span class="stringliteral">"mpi-teams"</span>;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="comment">// Increment number of AmgX instances</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> count++;</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="comment">// Get the name of this node</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keywordtype">int</span> len;</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keywordtype">char</span> name[MPI_MAX_PROCESSOR_NAME];</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> MPI_Get_processor_name(name, &len);</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> nodeName = name;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keywordtype">int</span> globalcommrank;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> MPI_Comm_rank(comm, &globalcommrank);</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <span class="comment">// Initialize communicators and corresponding information</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> InitMPIcomms(comm, nDevs);</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="comment">// Only processes in gpuWorld are required to initialize AmgX</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <span class="keywordflow">if</span> (gpuProc == 0)</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> {</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> InitAmgX();</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> }</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> isInitialized = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span>}</div>
</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> </div>
<div class="foldopen" id="foldopen00190" data-start="{" data-end="}">
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#ab55d8190a4305532e025dab81362503d"> 190</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#ab55d8190a4305532e025dab81362503d">AmgXSolver::ReadParameters</a>(<span class="keyword">const</span> std::string config,</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7">CONFIG_SRC</a> <a class="code hl_function" href="ex25_8cpp.html#aafef765e6aa140d0a04f5bedd532dc19">source</a>)</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span>{</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> amgx_config = config;</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> configSrc = <a class="code hl_function" href="ex25_8cpp.html#aafef765e6aa140d0a04f5bedd532dc19">source</a>;</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span>}</div>
</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="foldopen" id="foldopen00197" data-start="{" data-end="}">
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#aa629f0dc1ab3e1e7f4fe7871d1d61bec"> 197</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#aa629f0dc1ab3e1e7f4fe7871d1d61bec">AmgXSolver::SetConvergenceCheck</a>(<span class="keywordtype">bool</span> setConvergenceCheck_)</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span>{</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <a class="code hl_variable" href="classmfem_1_1AmgXSolver.html#a1088fe38c4f36f22ea70550e4272a450">ConvergenceCheck</a> = setConvergenceCheck_;</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span>}</div>
</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="foldopen" id="foldopen00202" data-start="{" data-end="}">
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"><a class="line" href="classmfem_1_1AmgXSolver.html#a5e521c91e81fe2e883608d9e1976c7a5"> 202</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classmfem_1_1AmgXSolver.html#a5e521c91e81fe2e883608d9e1976c7a5">AmgXSolver::DefaultParameters</a>(<span class="keyword">const</span> <a class="code hl_enumeration" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752c">AMGX_MODE</a> amgxMode_,</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> verbose)</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span>{</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> amgxMode = amgxMode_;</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> configSrc = <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7a62959275e2c5b6e76efc2f969873b392">INTERNAL</a>;</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> <span class="keywordflow">if</span> (amgxMode == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752caf7bc0614eb0effa62a53b6799a87f554">AMGX_MODE::PRECONDITIONER</a>)</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> {</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> amgx_config = <span class="stringliteral">"{\n"</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> <span class="stringliteral">" \"config_version\": 2, \n"</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <span class="stringliteral">" \"solver\": { \n"</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> <span class="stringliteral">" \"solver\": \"AMG\", \n"</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="stringliteral">" \"scope\": \"main\", \n"</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <span class="stringliteral">" \"smoother\": \"JACOBI_L1\", \n"</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="stringliteral">" \"presweeps\": 1, \n"</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> <span class="stringliteral">" \"interpolator\": \"D2\", \n"</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> <span class="stringliteral">" \"max_row_sum\" : 0.9, \n"</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> <span class="stringliteral">" \"strength_threshold\" : 0.25, \n"</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="stringliteral">" \"postsweeps\": 1, \n"</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <span class="stringliteral">" \"max_iters\": 1, \n"</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="stringliteral">" \"cycle\": \"V\""</span>;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> {</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> amgx_config = amgx_config + <span class="stringliteral">",\n"</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <span class="stringliteral">" \"obtain_timings\": 1, \n"</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> <span class="stringliteral">" \"print_grid_stats\": 1, \n"</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="stringliteral">" \"monitor_residual\": 1, \n"</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="stringliteral">" \"print_solve_stats\": 1 \n"</span>;</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> }</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> {</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> amgx_config = amgx_config + <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> }</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> amgx_config = amgx_config + <span class="stringliteral">" }\n"</span> + <span class="stringliteral">"}\n"</span>;</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <span class="comment">// use a zero initial guess in Mult()</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> <a class="code hl_variable" href="classmfem_1_1Solver.html#a272712697efa5927c3ce6bbd076845fb">iterative_mode</a> = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> }</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (amgxMode == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a928145b29da0d55511c56c0e3068752cae833eebaaef842ff2639069ec568b2c7">AMGX_MODE::SOLVER</a>)</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> {</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> amgx_config = <span class="stringliteral">"{ \n"</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> <span class="stringliteral">" \"config_version\": 2, \n"</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="stringliteral">" \"solver\": { \n"</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> <span class="stringliteral">" \"preconditioner\": { \n"</span></div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> <span class="stringliteral">" \"solver\": \"AMG\", \n"</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="stringliteral">" \"smoother\": { \n"</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> <span class="stringliteral">" \"scope\": \"jacobi\", \n"</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> <span class="stringliteral">" \"solver\": \"JACOBI_L1\" \n"</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> <span class="stringliteral">" }, \n"</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> <span class="stringliteral">" \"presweeps\": 1, \n"</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> <span class="stringliteral">" \"interpolator\": \"D2\", \n"</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> <span class="stringliteral">" \"max_row_sum\" : 0.9, \n"</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> <span class="stringliteral">" \"strength_threshold\" : 0.25, \n"</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="stringliteral">" \"max_iters\": 1, \n"</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="stringliteral">" \"scope\": \"amg\", \n"</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="stringliteral">" \"max_levels\": 100, \n"</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="stringliteral">" \"cycle\": \"V\", \n"</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="stringliteral">" \"postsweeps\": 1 \n"</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="stringliteral">" }, \n"</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> <span class="stringliteral">" \"solver\": \"PCG\", \n"</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> <span class="stringliteral">" \"max_iters\": 150, \n"</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> <span class="stringliteral">" \"convergence\": \"RELATIVE_INI_CORE\", \n"</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> <span class="stringliteral">" \"scope\": \"main\", \n"</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> <span class="stringliteral">" \"tolerance\": 1e-12, \n"</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> <span class="stringliteral">" \"monitor_residual\": 1, \n"</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> <span class="stringliteral">" \"norm\": \"L2\" "</span>;</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> {</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> amgx_config = amgx_config + <span class="stringliteral">", \n"</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> <span class="stringliteral">" \"obtain_timings\": 1, \n"</span></div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="stringliteral">" \"print_grid_stats\": 1, \n"</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <span class="stringliteral">" \"print_solve_stats\": 1 \n"</span>;</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> }</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> {</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> amgx_config = amgx_config + <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> }</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> amgx_config = amgx_config + <span class="stringliteral">" } \n"</span> + <span class="stringliteral">"} \n"</span>;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> <span class="comment">// use the user-specified vector as an initial guess in Mult()</span></div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <a class="code hl_variable" href="classmfem_1_1Solver.html#a272712697efa5927c3ce6bbd076845fb">iterative_mode</a> = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> }</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> {</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <a class="code hl_function" href="namespacemfem.html#a2a32aaca3e6d73a0dc6ca11de559c7e0">mfem_error</a>(<span class="stringliteral">"AmgX mode not supported \n"</span>);</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> }</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span>}</div>
</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> </div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span><span class="comment">// Sets up AmgX library for MPI builds</span></div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span><span class="preprocessor">#ifdef MFEM_USE_MPI</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span><span class="keywordtype">void</span> AmgXSolver::InitAmgX()</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span>{</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// Set up once</span></div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="keywordflow">if</span> (count == 1)</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> {</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> AMGX_SAFE_CALL(AMGX_initialize());</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> </div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> AMGX_SAFE_CALL(AMGX_initialize_plugins());</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> </div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> AMGX_SAFE_CALL(AMGX_install_signal_handler());</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> </div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> AMGX_SAFE_CALL(AMGX_register_print_callback(</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> [](<span class="keyword">const</span> <span class="keywordtype">char</span> *msg, <span class="keywordtype">int</span> length)-><span class="keywordtype">void</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> {</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <span class="keywordtype">int</span> irank; MPI_Comm_rank(MPI_COMM_WORLD, &irank);</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="keywordflow">if</span> (irank == 0) { <a class="code hl_variable" href="namespacemfem.html#a4042207f77a0aedbf8d6fc9d125f6f24">mfem::out</a><<msg;} }));</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> }</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> </div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> MFEM_VERIFY(configSrc != <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7a8992692012c523ccbaf88e41c2524588">CONFIG_SRC::UNDEFINED</a>,</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> <span class="stringliteral">"AmgX configuration is not defined \n"</span>);</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> </div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> <span class="keywordflow">if</span> (configSrc == <a class="code hl_enumvalue" href="classmfem_1_1AmgXSolver.html#a1159aab911bcfd9c5b6d2cbe842987a7a0ccf63c071b521277393fcaf498a8633">CONFIG_SRC::EXTERNAL</a>)</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> {</div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> AMGX_SAFE_CALL(AMGX_config_create_from_file(&cfg, amgx_config.c_str()));</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> }</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> {</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> AMGX_SAFE_CALL(AMGX_config_create(&cfg, amgx_config.c_str()));</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> }</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> </div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> <span class="comment">// Let AmgX handle returned error codes internally</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> AMGX_SAFE_CALL(AMGX_config_add_parameters(&cfg, <span class="stringliteral">"exception_handling=1"</span>));</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> </div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> <span class="comment">// Create an AmgX resource object, only the first instance needs to create</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> <span class="comment">// the resource object.</span></div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="keywordflow">if</span> (count == 1) { AMGX_SAFE_CALL(AMGX_resources_create(&rsrc, cfg, &gpuWorld, 1, &devID)); }</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> </div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> <span class="comment">// Create AmgX vector object for unknowns and RHS</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> AMGX_SAFE_CALL(AMGX_vector_create(&AmgXP, rsrc, precision_mode));</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> AMGX_SAFE_CALL(AMGX_vector_create(&AmgXRHS, rsrc, precision_mode));</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> </div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> <span class="comment">// Create AmgX matrix object for unknowns and RHS</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> AMGX_SAFE_CALL(AMGX_matrix_create(&AmgXA, rsrc, precision_mode));</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> <span class="comment">// Create an AmgX solver object</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span> AMGX_SAFE_CALL(AMGX_solver_create(&solver, rsrc, precision_mode, cfg));</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> </div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span> <span class="comment">// Obtain the default number of rings based on current configuration</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span> AMGX_SAFE_CALL(AMGX_config_get_default_number_of_rings(cfg, &ring));</div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span>}</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> </div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span><span class="comment">// Groups MPI ranks into teams and assigns the roots to talk to GPUs</span></div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span><span class="keywordtype">void</span> AmgXSolver::InitMPIcomms(<span class="keyword">const</span> MPI_Comm &comm, <span class="keyword">const</span> <span class="keywordtype">int</span> nDevs)</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span>{</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> <span class="comment">// Duplicate the global communicator</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> MPI_Comm_dup(comm, &globalCpuWorld);</div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> MPI_Comm_set_name(globalCpuWorld, <span class="stringliteral">"globalCpuWorld"</span>);</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> </div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> <span class="comment">// Get size and rank for global communicator</span></div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> MPI_Comm_size(globalCpuWorld, &globalSize);</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> MPI_Comm_rank(globalCpuWorld, &myGlobalRank);</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> </div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> <span class="comment">// Get the communicator for processors on the same node (local world)</span></div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> MPI_Comm_split_type(globalCpuWorld,</div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> MPI_COMM_TYPE_SHARED, 0, MPI_INFO_NULL, &localCpuWorld);</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> MPI_Comm_set_name(localCpuWorld, <span class="stringliteral">"localCpuWorld"</span>);</div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> </div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> <span class="comment">// Get size and rank for local communicator</span></div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> MPI_Comm_size(localCpuWorld, &localSize);</div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> MPI_Comm_rank(localCpuWorld, &myLocalRank);</div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> </div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> <span class="comment">// Set up corresponding ID of the device used by each local process</span></div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> SetDeviceIDs(nDevs);</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span> </div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> MPI_Barrier(globalCpuWorld);</div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> </div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> <span class="comment">// Split the global world into a world involved in AmgX and a null world</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> MPI_Comm_split(globalCpuWorld, gpuProc, 0, &gpuWorld);</div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> </div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span> <span class="comment">// Get size and rank for the communicator corresponding to gpuWorld</span></div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> <span class="keywordflow">if</span> (gpuWorld != MPI_COMM_NULL)</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> {</div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span> MPI_Comm_set_name(gpuWorld, <span class="stringliteral">"gpuWorld"</span>);</div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span> MPI_Comm_size(gpuWorld, &gpuWorldSize);</div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span> MPI_Comm_rank(gpuWorld, &myGpuWorldRank);</div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span> }</div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span> <span class="keywordflow">else</span> <span class="comment">// for those that will not communicate with the GPU</span></div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> {</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> gpuWorldSize = MPI_UNDEFINED;</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> myGpuWorldRank = MPI_UNDEFINED;</div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span> }</div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span> </div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span> <span class="comment">// Split local world into worlds corresponding to each CUDA device</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> MPI_Comm_split(localCpuWorld, devID, 0, &devWorld);</div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span> MPI_Comm_set_name(devWorld, <span class="stringliteral">"devWorld"</span>);</div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span> </div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> <span class="comment">// Get size and rank for the communicator corresponding to myWorld</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span> MPI_Comm_size(devWorld, &devWorldSize);</div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"> 389</span> MPI_Comm_rank(devWorld, &myDevWorldRank);</div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno"> 390</span> </div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span> MPI_Barrier(globalCpuWorld);</div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"> 392</span>}</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span> </div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span><span class="comment">// Determine MPI teams based on available devices</span></div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"> 395</span><span class="keywordtype">void</span> AmgXSolver::SetDeviceIDs(<span class="keyword">const</span> <span class="keywordtype">int</span> nDevs)</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span>{</div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span> <span class="comment">// Set the ID of device that each local process will use</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span> <span class="keywordflow">if</span> (nDevs == localSize) <span class="comment">// # of the devices and local process are the same</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"> 399</span> {</div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> devID = myLocalRank;</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> gpuProc = 0;</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span> }</div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (nDevs > localSize) <span class="comment">// there are more devices than processes</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span> {</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span> MFEM_WARNING(<span class="stringliteral">"CUDA devices on the node "</span> << nodeName.c_str() <<</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span> <span class="stringliteral">" are more than the MPI processes launched. Only "</span><<</div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span> nDevs << <span class="stringliteral">" devices will be used.\n"</span>);</div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span> devID = myLocalRank;</div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> gpuProc = 0;</div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span> }</div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> <span class="keywordflow">else</span> <span class="comment">// in case there are more ranks than devices</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span> {</div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span> <span class="keywordtype">int</span> nBasic = localSize / nDevs,</div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span> nRemain = localSize % nDevs;</div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span> </div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span> <span class="keywordflow">if</span> (myLocalRank < (nBasic+1)*nRemain)</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span> {</div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span> devID = myLocalRank / (nBasic + 1);</div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span> <span class="keywordflow">if</span> (myLocalRank % (nBasic + 1) == 0) { gpuProc = 0; }</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span> }</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span> {</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> devID = (myLocalRank - (nBasic+1)*nRemain) / nBasic + nRemain;</div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span> <span class="keywordflow">if</span> ((myLocalRank - (nBasic+1)*nRemain) % nBasic == 0) { gpuProc = 0; }</div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span> }</div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span> }</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span>}</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span><span class="keywordtype">void</span> AmgXSolver::GatherArray(<span class="keyword">const</span> Array<double> &inArr, Array<double> &outArr,</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm)<span class="keyword"> const</span></div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span> <span class="comment">// Calculate number of elements to be collected from each process</span></div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span> Array<int> Apart(mpiTeamSz);</div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> <span class="keywordtype">int</span> locAsz = inArr.Size();</div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> MPI_Gather(&locAsz, 1, MPI_INT,</div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span> Apart.HostWrite(),1, MPI_INT,0,mpiTeamComm);</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> </div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> </div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span> <span class="comment">// Determine stride for process (to be used by root)</span></div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span> Array<int> Adisp(mpiTeamSz);</div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> <span class="keywordtype">int</span> myid; MPI_Comm_rank(mpiTeamComm, &myid);</div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span> <span class="keywordflow">if</span> (myid == 0)</div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> {</div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span> Adisp[0] = 0;</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<mpiTeamSz; ++i)</div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span> {</div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span> Adisp[i] = Adisp[i-1] + Apart[i-1];</div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span> }</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span> }</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span> </div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno"> 452</span> MPI_Gatherv(inArr.HostRead(), inArr.Size(), MPITypeMap<real_t>::mpi_type,</div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno"> 453</span> outArr.HostWrite(), Apart.HostRead(), Adisp.HostRead(),</div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno"> 454</span> MPITypeMap<real_t>::mpi_type, 0, mpiTeamComm);</div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"> 455</span>}</div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"> 456</span> </div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span><span class="keywordtype">void</span> AmgXSolver::GatherArray(<span class="keyword">const</span> Vector &inArr, Vector &outArr,</div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm)<span class="keyword"> const</span></div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span> <span class="comment">// Calculate number of elements to be collected from each process</span></div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span> Array<int> Apart(mpiTeamSz);</div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span> <span class="keywordtype">int</span> locAsz = inArr.Size();</div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"> 463</span> MPI_Gather(&locAsz, 1, MPI_INT,</div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span> Apart.HostWrite(),1, MPI_INT,0,mpiTeamComm);</div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span> </div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span> </div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span> <span class="comment">// Determine stride for process (to be used by root)</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span> Array<int> Adisp(mpiTeamSz);</div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span> <span class="keywordtype">int</span> myid; MPI_Comm_rank(mpiTeamComm, &myid);</div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span> <span class="keywordflow">if</span> (myid == 0)</div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span> {</div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span> Adisp[0] = 0;</div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<mpiTeamSz; ++i)</div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span> {</div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span> Adisp[i] = Adisp[i-1] + Apart[i-1];</div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span> }</div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"> 478</span> }</div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span> </div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span> MPI_Gatherv(inArr.HostRead(), inArr.Size(), MPITypeMap<real_t>::mpi_type,</div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span> outArr.HostWrite(), Apart.HostRead(), Adisp.HostRead(),</div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span> MPITypeMap<real_t>::mpi_type, 0, mpiTeamComm);</div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span>}</div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span> </div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno"> 485</span><span class="keywordtype">void</span> AmgXSolver::GatherArray(<span class="keyword">const</span> Array<int> &inArr, Array<int> &outArr,</div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno"> 486</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm)<span class="keyword"> const</span></div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno"> 487</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno"> 488</span> <span class="comment">// Calculate number of elements to be collected from each process</span></div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno"> 489</span> Array<int> Apart(mpiTeamSz);</div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno"> 490</span> <span class="keywordtype">int</span> locAsz = inArr.Size();</div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno"> 491</span> MPI_Gather(&locAsz, 1, MPI_INT,</div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno"> 492</span> Apart.GetData(),1, MPI_INT,0,mpiTeamComm);</div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno"> 493</span> </div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"> 494</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span> </div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span> <span class="comment">// Determine stride for process (to be used by root)</span></div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span> Array<int> Adisp(mpiTeamSz);</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span> <span class="keywordtype">int</span> myid; MPI_Comm_rank(mpiTeamComm, &myid);</div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span> <span class="keywordflow">if</span> (myid == 0)</div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span> {</div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span> Adisp[0] = 0;</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<mpiTeamSz; ++i)</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span> {</div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span> Adisp[i] = Adisp[i-1] + Apart[i-1];</div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span> }</div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"> 506</span> }</div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno"> 507</span> </div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno"> 508</span> MPI_Gatherv(inArr.HostRead(), inArr.Size(), MPI_INT,</div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno"> 509</span> outArr.HostWrite(), Apart.HostRead(), Adisp.HostRead(),</div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno"> 510</span> MPI_INT, 0, mpiTeamComm);</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno"> 511</span>}</div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno"> 512</span> </div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno"> 513</span> </div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno"> 514</span><span class="keywordtype">void</span> AmgXSolver::GatherArray(<span class="keyword">const</span> Array<int64_t> &inArr,</div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno"> 515</span> Array<int64_t> &outArr,</div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno"> 516</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm)<span class="keyword"> const</span></div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno"> 517</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno"> 518</span> <span class="comment">// Calculate number of elements to be collected from each process</span></div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno"> 519</span> Array<int> Apart(mpiTeamSz);</div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno"> 520</span> <span class="keywordtype">int</span> locAsz = inArr.Size();</div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno"> 521</span> MPI_Gather(&locAsz, 1, MPI_INT,</div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"> 522</span> Apart.GetData(),1, MPI_INT,0,mpiTeamComm);</div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span> </div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno"> 525</span> </div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno"> 526</span> <span class="comment">// Determine stride for process</span></div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno"> 527</span> Array<int> Adisp(mpiTeamSz);</div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno"> 528</span> <span class="keywordtype">int</span> myid; MPI_Comm_rank(mpiTeamComm, &myid);</div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno"> 529</span> <span class="keywordflow">if</span> (myid == 0)</div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno"> 530</span> {</div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno"> 531</span> Adisp[0] = 0;</div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno"> 532</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<mpiTeamSz; ++i)</div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno"> 533</span> {</div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno"> 534</span> Adisp[i] = Adisp[i-1] + Apart[i-1];</div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno"> 535</span> }</div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno"> 536</span> }</div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"> 537</span> </div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span> MPI_Gatherv(inArr.HostRead(), inArr.Size(), MPI_INT64_T,</div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno"> 539</span> outArr.HostWrite(), Apart.HostRead(), Adisp.HostRead(),</div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno"> 540</span> MPI_INT64_T, 0, mpiTeamComm);</div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno"> 541</span> </div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno"> 542</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno"> 543</span>}</div>
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno"> 544</span> </div>
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno"> 545</span><span class="keywordtype">void</span> AmgXSolver::GatherArray(<span class="keyword">const</span> Vector &inArr, Vector &outArr,</div>
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno"> 546</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm,</div>
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno"> 547</span> Array<int> &Apart, Array<int> &Adisp)<span class="keyword"> const</span></div>
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno"> 548</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno"> 549</span> <span class="comment">// Calculate number of elements to be collected from each process</span></div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno"> 550</span> <span class="keywordtype">int</span> locAsz = inArr.Size();</div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno"> 551</span> MPI_Allgather(&locAsz, 1, MPI_INT,</div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno"> 552</span> Apart.HostWrite(),1, MPI_INT, mpiTeamComm);</div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno"> 553</span> </div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno"> 554</span> MPI_Barrier(mpiTeamComm);</div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno"> 555</span> </div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno"> 556</span> <span class="comment">// Determine stride for process</span></div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno"> 557</span> Adisp[0] = 0;</div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"> 558</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<mpiTeamSz; ++i)</div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span> {</div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno"> 560</span> Adisp[i] = Adisp[i-1] + Apart[i-1];</div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno"> 561</span> }</div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno"> 562</span> </div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span> MPI_Gatherv(inArr.HostRead(), inArr.Size(), MPITypeMap<real_t>::mpi_type,</div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"> 564</span> outArr.HostWrite(), Apart.HostRead(), Adisp.HostRead(),</div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span> MPITypeMap<real_t>::mpi_type, 0, mpiTeamComm);</div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span>}</div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span> </div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span><span class="keywordtype">void</span> AmgXSolver::ScatterArray(<span class="keyword">const</span> Vector &inArr, Vector &outArr,</div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno"> 569</span> <span class="keyword">const</span> <span class="keywordtype">int</span> mpiTeamSz, <span class="keyword">const</span> MPI_Comm &mpiTeamComm,</div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno"> 570</span> Array<int> &Apart, Array<int> &Adisp)<span class="keyword"> const</span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno"> 571</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno"> 572</span> MPI_Scatterv(inArr.HostRead(),Apart.HostRead(),Adisp.HostRead(),</div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno"> 573</span> MPITypeMap<real_t>::mpi_type,outArr.HostWrite(),outArr.Size(),</div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"> 574</span> MPITypeMap<real_t>::mpi_type, 0, mpiTeamComm);</div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span>}</div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span> </div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span><span class="keywordtype">void</span> AmgXSolver::SetMatrix(<span class="keyword">const</span> SparseMatrix &in_A, <span class="keyword">const</span> <span class="keywordtype">bool</span> update_mat)</div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span>{</div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"> 580</span> <span class="keywordflow">if</span> (update_mat == <span class="keyword">false</span>)</div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span> {</div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span> AMGX_SAFE_CALL(AMGX_matrix_upload_all(AmgXA, in_A.Height(),</div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span> in_A.NumNonZeroElems(),</div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno"> 584</span> 1, 1,</div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno"> 585</span> in_A.ReadI(),</div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno"> 586</span> in_A.ReadJ(),</div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno"> 587</span> in_A.ReadData(), NULL));</div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno"> 588</span> </div>
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno"> 589</span> AMGX_SAFE_CALL(AMGX_solver_setup(solver, AmgXA));</div>
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno"> 590</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXP, AmgXA));</div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno"> 591</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXRHS, AmgXA));</div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno"> 592</span> }</div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno"> 593</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span> {</div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span> AMGX_SAFE_CALL(AMGX_matrix_replace_coefficients(AmgXA,</div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"> 596</span> in_A.Height(),</div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span> in_A.NumNonZeroElems(),</div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno"> 598</span> in_A.ReadData(), NULL));</div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno"> 599</span> }</div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno"> 600</span>}</div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno"> 601</span> </div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno"> 602</span><span class="preprocessor">#ifdef MFEM_USE_MPI</span></div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno"> 603</span> </div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno"> 604</span><span class="keywordtype">void</span> AmgXSolver::SetMatrix(<span class="keyword">const</span> HypreParMatrix &A, <span class="keyword">const</span> <span class="keywordtype">bool</span> update_mat)</div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno"> 605</span>{</div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"> 606</span> <span class="comment">// Require hypre >= 2.16.</span></div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno"> 607</span><span class="preprocessor">#if MFEM_HYPRE_VERSION < 21600</span></div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno"> 608</span> <a class="code hl_function" href="namespacemfem.html#a2a32aaca3e6d73a0dc6ca11de559c7e0">mfem_error</a>(<span class="stringliteral">"Hypre version 2.16+ is required when using AmgX \n"</span>);</div>
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno"> 609</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno"> 610</span> </div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno"> 611</span> <span class="comment">// Ensure HypreParMatrix is on the host</span></div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno"> 612</span> A.HostRead();</div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno"> 613</span> </div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno"> 614</span> hypre_ParCSRMatrix * A_ptr =</div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno"> 615</span> (hypre_ParCSRMatrix *)<span class="keyword">const_cast<</span>HypreParMatrix&<span class="keyword">></span>(A);</div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno"> 616</span> </div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno"> 617</span> hypre_CSRMatrix *A_csr = hypre_MergeDiagAndOffd(A_ptr);</div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span> </div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span> A.HypreRead();</div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span> </div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span> Array<double> loc_A(A_csr->data, (<span class="keywordtype">int</span>)A_csr->num_nonzeros);</div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno"> 622</span> <span class="keyword">const</span> Array<HYPRE_Int> loc_I(A_csr->i, (<span class="keywordtype">int</span>)A_csr->num_rows+1);</div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno"> 623</span> </div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno"> 624</span> <span class="comment">// Column index must be int64_t so we must promote here</span></div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno"> 625</span> Array<int64_t> loc_J((<span class="keywordtype">int</span>)A_csr->num_nonzeros);</div>
<div class="line"><a id="l00626" name="l00626"></a><span class="lineno"> 626</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<A_csr->num_nonzeros; ++i)</div>
<div class="line"><a id="l00627" name="l00627"></a><span class="lineno"> 627</span> {</div>
<div class="line"><a id="l00628" name="l00628"></a><span class="lineno"> 628</span> loc_J[i] = A_csr->big_j[i];</div>
<div class="line"><a id="l00629" name="l00629"></a><span class="lineno"> 629</span> }</div>
<div class="line"><a id="l00630" name="l00630"></a><span class="lineno"> 630</span> </div>
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno"> 631</span> <span class="comment">// Assumes one GPU per MPI rank</span></div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno"> 632</span> <span class="keywordflow">if</span> (mpi_gpu_mode==<span class="stringliteral">"mpi-gpu-exclusive"</span>)</div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno"> 633</span> {</div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"> 634</span> SetMatrixMPIGPUExclusive(A, loc_A, loc_I, loc_J, update_mat);</div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno"> 635</span> <span class="comment">// Free A_csr data from hypre_MergeDiagAndOffd method</span></div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno"> 636</span> hypre_CSRMatrixDestroy(A_csr);</div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno"> 637</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno"> 638</span> }</div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno"> 639</span> </div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno"> 640</span> <span class="comment">// Assumes teams of MPI ranks are sharing a GPU</span></div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno"> 641</span> <span class="keywordflow">if</span> (mpi_gpu_mode == <span class="stringliteral">"mpi-teams"</span>)</div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno"> 642</span> {</div>
<div class="line"><a id="l00643" name="l00643"></a><span class="lineno"> 643</span> SetMatrixMPITeams(A, loc_A, loc_I, loc_J, update_mat);</div>
<div class="line"><a id="l00644" name="l00644"></a><span class="lineno"> 644</span> <span class="comment">// Free A_csr data from hypre_MergeDiagAndOffd method</span></div>
<div class="line"><a id="l00645" name="l00645"></a><span class="lineno"> 645</span> hypre_CSRMatrixDestroy(A_csr);</div>
<div class="line"><a id="l00646" name="l00646"></a><span class="lineno"> 646</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno"> 647</span> }</div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno"> 648</span> </div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno"> 649</span> <a class="code hl_function" href="namespacemfem.html#a2a32aaca3e6d73a0dc6ca11de559c7e0">mfem_error</a>(<span class="stringliteral">"Unsupported MPI_GPU combination \n"</span>);</div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno"> 650</span>}</div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno"> 651</span> </div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno"> 652</span><span class="keywordtype">void</span> AmgXSolver::SetMatrixMPIGPUExclusive(<span class="keyword">const</span> HypreParMatrix &A,</div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno"> 653</span> <span class="keyword">const</span> Array<double> &loc_A,</div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno"> 654</span> <span class="keyword">const</span> Array<int> &loc_I,</div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno"> 655</span> <span class="keyword">const</span> Array<int64_t> &loc_J,</div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno"> 656</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> update_mat)</div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno"> 657</span>{</div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno"> 658</span> <span class="comment">// Create a vector of offsets describing matrix row partitions</span></div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno"> 659</span> Array<int64_t> rowPart(gpuWorldSize+1); rowPart = 0.0;</div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno"> 660</span> </div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno"> 661</span> int64_t myStart = A.GetRowStarts()[0];</div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno"> 662</span> </div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno"> 663</span> MPI_Allgather(&myStart, 1, MPI_INT64_T,</div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno"> 664</span> rowPart.GetData(),1, MPI_INT64_T</div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno"> 665</span> ,gpuWorld);</div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno"> 666</span> MPI_Barrier(gpuWorld);</div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno"> 667</span> </div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno"> 668</span> rowPart[gpuWorldSize] = A.M();</div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno"> 669</span> </div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno"> 670</span> <span class="keyword">const</span> <span class="keywordtype">int</span> nGlobalRows = A.M();</div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno"> 671</span> <span class="keyword">const</span> <span class="keywordtype">int</span> local_rows = loc_I.Size()-1;</div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno"> 672</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_nnz = loc_I[local_rows];</div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno"> 673</span> </div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno"> 674</span> <span class="keywordflow">if</span> (update_mat == <span class="keyword">false</span>)</div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno"> 675</span> {</div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno"> 676</span> AMGX_distribution_handle dist;</div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno"> 677</span> AMGX_SAFE_CALL(AMGX_distribution_create(&dist, cfg));</div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno"> 678</span> AMGX_SAFE_CALL(AMGX_distribution_set_partition_data(dist,</div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno"> 679</span> AMGX_DIST_PARTITION_OFFSETS,</div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno"> 680</span> rowPart.GetData()));</div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno"> 681</span> </div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno"> 682</span> AMGX_SAFE_CALL(AMGX_matrix_upload_distributed(AmgXA, nGlobalRows,</div>
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno"> 683</span> local_rows, num_nnz, 1, 1,</div>
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno"> 684</span> loc_I.Read(), loc_J.Read(),</div>
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno"> 685</span> loc_A.Read(), NULL, dist));</div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno"> 686</span> </div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno"> 687</span> AMGX_SAFE_CALL(AMGX_distribution_destroy(dist));</div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno"> 688</span> </div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno"> 689</span> MPI_Barrier(gpuWorld);</div>
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno"> 690</span> </div>
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno"> 691</span> AMGX_SAFE_CALL(AMGX_solver_setup(solver, AmgXA));</div>
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno"> 692</span> </div>
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno"> 693</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXP, AmgXA));</div>
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno"> 694</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXRHS, AmgXA));</div>
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno"> 695</span> }</div>
<div class="line"><a id="l00696" name="l00696"></a><span class="lineno"> 696</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno"> 697</span> {</div>
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno"> 698</span> AMGX_SAFE_CALL(AMGX_matrix_replace_coefficients(AmgXA, nGlobalRows,</div>
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno"> 699</span> num_nnz, loc_A, NULL));</div>
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno"> 700</span> }</div>
<div class="line"><a id="l00701" name="l00701"></a><span class="lineno"> 701</span>}</div>
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno"> 702</span> </div>
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno"> 703</span><span class="keywordtype">void</span> AmgXSolver::SetMatrixMPITeams(<span class="keyword">const</span> HypreParMatrix &A,</div>
<div class="line"><a id="l00704" name="l00704"></a><span class="lineno"> 704</span> <span class="keyword">const</span> Array<double> &loc_A,</div>
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno"> 705</span> <span class="keyword">const</span> Array<int> &loc_I,</div>
<div class="line"><a id="l00706" name="l00706"></a><span class="lineno"> 706</span> <span class="keyword">const</span> Array<int64_t> &loc_J,</div>
<div class="line"><a id="l00707" name="l00707"></a><span class="lineno"> 707</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> update_mat)</div>
<div class="line"><a id="l00708" name="l00708"></a><span class="lineno"> 708</span>{</div>
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno"> 709</span> <span class="comment">// The following arrays hold the consolidated diagonal + off-diagonal matrix</span></div>
<div class="line"><a id="l00710" name="l00710"></a><span class="lineno"> 710</span> <span class="comment">// data</span></div>
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno"> 711</span> Array<int> all_I;</div>
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno"> 712</span> Array<int64_t> all_J;</div>
<div class="line"><a id="l00713" name="l00713"></a><span class="lineno"> 713</span> Array<double> all_A;</div>
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno"> 714</span> </div>
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno"> 715</span> <span class="comment">// Determine array sizes</span></div>
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno"> 716</span> <span class="keywordtype">int</span> J_allsz(0), all_NNZ(0), nDevRows(0);</div>
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno"> 717</span> <span class="keyword">const</span> <span class="keywordtype">int</span> loc_row_len = std::abs(A.RowPart()[1] -</div>
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno"> 718</span> A.RowPart()[0]); <span class="comment">// end of row partition</span></div>
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno"> 719</span> <span class="keyword">const</span> <span class="keywordtype">int</span> loc_Jz_sz = loc_J.Size();</div>
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno"> 720</span> <span class="keyword">const</span> <span class="keywordtype">int</span> loc_A_sz = loc_A.Size();</div>
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno"> 721</span> </div>
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno"> 722</span> MPI_Reduce(&loc_row_len, &nDevRows, 1, MPI_INT, MPI_SUM, 0, devWorld);</div>
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno"> 723</span> MPI_Reduce(&loc_Jz_sz, &J_allsz, 1, MPI_INT, MPI_SUM, 0, devWorld);</div>
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno"> 724</span> MPI_Reduce(&loc_A_sz, &all_NNZ, 1, MPI_INT, MPI_SUM, 0, devWorld);</div>
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno"> 725</span> </div>
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno"> 726</span> MPI_Barrier(devWorld);</div>
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno"> 727</span> </div>
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno"> 728</span> <span class="keywordflow">if</span> (myDevWorldRank == 0)</div>
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno"> 729</span> {</div>
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno"> 730</span> all_I.SetSize(nDevRows+devWorldSize);</div>
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno"> 731</span> all_J.SetSize(J_allsz); all_J = 0.0;</div>
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno"> 732</span> all_A.SetSize(all_NNZ);</div>
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno"> 733</span> }</div>
<div class="line"><a id="l00734" name="l00734"></a><span class="lineno"> 734</span> </div>
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno"> 735</span> GatherArray(loc_I, all_I, devWorldSize, devWorld);</div>
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno"> 736</span> GatherArray(loc_J, all_J, devWorldSize, devWorld);</div>
<div class="line"><a id="l00737" name="l00737"></a><span class="lineno"> 737</span> GatherArray(loc_A, all_A, devWorldSize, devWorld);</div>
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno"> 738</span> </div>
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno"> 739</span> MPI_Barrier(devWorld);</div>
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno"> 740</span> </div>
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno"> 741</span> <span class="keywordtype">int</span> local_nnz(0);</div>
<div class="line"><a id="l00742" name="l00742"></a><span class="lineno"> 742</span> int64_t local_rows(0);</div>
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno"> 743</span> </div>
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno"> 744</span> <span class="keywordflow">if</span> (myDevWorldRank == 0)</div>
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno"> 745</span> {</div>
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno"> 746</span> <span class="comment">// A fix up step is needed for the array holding row data to remove extra</span></div>
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno"> 747</span> <span class="comment">// zeros when consolidating team data.</span></div>
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno"> 748</span> Array<int> z_ind(devWorldSize+1);</div>
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno"> 749</span> <span class="keywordtype">int</span> iter = 1;</div>
<div class="line"><a id="l00750" name="l00750"></a><span class="lineno"> 750</span> <span class="keywordflow">while</span> (iter < devWorldSize-1)</div>
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno"> 751</span> {</div>
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno"> 752</span> <span class="comment">// Determine the indices of zeros in global all_I array</span></div>
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno"> 753</span> <span class="keywordtype">int</span> counter = 0;</div>
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno"> 754</span> z_ind[counter] = counter;</div>
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno"> 755</span> counter++;</div>
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno"> 756</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> idx=1; idx<all_I.Size()-1; idx++)</div>
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno"> 757</span> {</div>
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno"> 758</span> <span class="keywordflow">if</span> (all_I[idx]==0)</div>
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno"> 759</span> {</div>
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno"> 760</span> z_ind[counter] = idx-1;</div>
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno"> 761</span> counter++;</div>
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno"> 762</span> }</div>
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno"> 763</span> }</div>
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno"> 764</span> z_ind[devWorldSize] = all_I.Size()-1;</div>
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno"> 765</span> <span class="comment">// End of determining indices of zeros in global all_I Array</span></div>
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno"> 766</span> </div>
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno"> 767</span> <span class="comment">// Bump all_I</span></div>
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno"> 768</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> idx=z_ind[1]+1; idx < z_ind[2]; idx++)</div>
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno"> 769</span> {</div>
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno"> 770</span> all_I[idx] = all_I[idx-1] + (all_I[idx+1] - all_I[idx]);</div>
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno"> 771</span> }</div>
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno"> 772</span> </div>
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno"> 773</span> <span class="comment">// Shift array after bump to remove unnecessary values in middle of</span></div>
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno"> 774</span> <span class="comment">// array</span></div>
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno"> 775</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> idx=z_ind[2]; idx < all_I.Size()-1; ++idx)</div>
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno"> 776</span> {</div>
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno"> 777</span> all_I[idx] = all_I[idx+1];</div>
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno"> 778</span> }</div>
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno"> 779</span> iter++;</div>
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno"> 780</span> }</div>
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno"> 781</span> </div>
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno"> 782</span> <span class="comment">// LAST TIME THROUGH ARRAY</span></div>
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno"> 783</span> <span class="comment">// Determine the indices of zeros in global row_ptr array</span></div>
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno"> 784</span> <span class="keywordtype">int</span> counter = 0;</div>
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno"> 785</span> z_ind[counter] = counter;</div>
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno"> 786</span> counter++;</div>
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno"> 787</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> idx=1; idx<all_I.Size()-1; idx++)</div>
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno"> 788</span> {</div>
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno"> 789</span> <span class="keywordflow">if</span> (all_I[idx]==0)</div>
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno"> 790</span> {</div>
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno"> 791</span> z_ind[counter] = idx-1;</div>
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno"> 792</span> counter++;</div>
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno"> 793</span> }</div>
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno"> 794</span> }</div>
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno"> 795</span> </div>
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno"> 796</span> z_ind[devWorldSize] = all_I.Size()-1;</div>
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno"> 797</span> <span class="comment">// End of determining indices of zeros in global all_I Array BUMP all_I</span></div>
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno"> 798</span> <span class="comment">// one last time</span></div>
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno"> 799</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> idx=z_ind[1]+1; idx < all_I.Size()-1; idx++)</div>
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno"> 800</span> {</div>
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno"> 801</span> all_I[idx] = all_I[idx-1] + (all_I[idx+1] - all_I[idx]);</div>
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno"> 802</span> }</div>
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno"> 803</span> local_nnz = all_I[all_I.Size()-devWorldSize];</div>
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno"> 804</span> local_rows = nDevRows;</div>
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno"> 805</span> }</div>
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno"> 806</span> </div>
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno"> 807</span> <span class="comment">// Create row partition</span></div>
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno"> 808</span> mat_local_rows = local_rows; <span class="comment">// class copy</span></div>
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno"> 809</span> Array<int64_t> rowPart;</div>
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno"> 810</span> <span class="keywordflow">if</span> (gpuProc == 0)</div>
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno"> 811</span> {</div>
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno"> 812</span> rowPart.SetSize(gpuWorldSize+1); rowPart=0;</div>
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno"> 813</span> </div>
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno"> 814</span> MPI_Allgather(&local_rows, 1, MPI_INT64_T,</div>
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno"> 815</span> &rowPart.GetData()[1], 1, MPI_INT64_T,</div>
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno"> 816</span> gpuWorld);</div>
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno"> 817</span> MPI_Barrier(gpuWorld);</div>
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno"> 818</span> </div>
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno"> 819</span> <span class="comment">// Fixup step</span></div>
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno"> 820</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<rowPart.Size(); ++i)</div>
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno"> 821</span> {</div>
<div class="line"><a id="l00822" name="l00822"></a><span class="lineno"> 822</span> rowPart[i] += rowPart[i-1];</div>
<div class="line"><a id="l00823" name="l00823"></a><span class="lineno"> 823</span> }</div>
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno"> 824</span> </div>
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno"> 825</span> <span class="comment">// Upload A matrix to AmgX</span></div>
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno"> 826</span> MPI_Barrier(gpuWorld);</div>
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno"> 827</span> </div>
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno"> 828</span> <span class="keywordtype">int</span> nGlobalRows = A.M();</div>
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno"> 829</span> <span class="keywordflow">if</span> (update_mat == <span class="keyword">false</span>)</div>
<div class="line"><a id="l00830" name="l00830"></a><span class="lineno"> 830</span> {</div>
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno"> 831</span> AMGX_distribution_handle dist;</div>
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno"> 832</span> AMGX_SAFE_CALL(AMGX_distribution_create(&dist, cfg));</div>
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno"> 833</span> AMGX_SAFE_CALL(AMGX_distribution_set_partition_data(dist,</div>
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno"> 834</span> AMGX_DIST_PARTITION_OFFSETS,</div>
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno"> 835</span> rowPart.GetData()));</div>
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno"> 836</span> </div>
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno"> 837</span> AMGX_SAFE_CALL(AMGX_matrix_upload_distributed(AmgXA, nGlobalRows,</div>
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno"> 838</span> local_rows, local_nnz,</div>
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno"> 839</span> 1, 1, all_I.ReadWrite(),</div>
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno"> 840</span> all_J.Read(),</div>
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno"> 841</span> all_A.Read(),</div>
<div class="line"><a id="l00842" name="l00842"></a><span class="lineno"> 842</span> <span class="keyword">nullptr</span>, dist));</div>
<div class="line"><a id="l00843" name="l00843"></a><span class="lineno"> 843</span> </div>
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno"> 844</span> AMGX_SAFE_CALL(AMGX_distribution_destroy(dist));</div>
<div class="line"><a id="l00845" name="l00845"></a><span class="lineno"> 845</span> MPI_Barrier(gpuWorld);</div>
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno"> 846</span> </div>
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno"> 847</span> AMGX_SAFE_CALL(AMGX_solver_setup(solver, AmgXA));</div>
<div class="line"><a id="l00848" name="l00848"></a><span class="lineno"> 848</span> </div>
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno"> 849</span> <span class="comment">// Bind vectors to A</span></div>
<div class="line"><a id="l00850" name="l00850"></a><span class="lineno"> 850</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXP, AmgXA));</div>
<div class="line"><a id="l00851" name="l00851"></a><span class="lineno"> 851</span> AMGX_SAFE_CALL(AMGX_vector_bind(AmgXRHS, AmgXA));</div>
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno"> 852</span> }</div>
<div class="line"><a id="l00853" name="l00853"></a><span class="lineno"> 853</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00854" name="l00854"></a><span class="lineno"> 854</span> {</div>
<div class="line"><a id="l00855" name="l00855"></a><span class="lineno"> 855</span> AMGX_SAFE_CALL(AMGX_matrix_replace_coefficients(AmgXA, nGlobalRows,</div>
<div class="line"><a id="l00856" name="l00856"></a><span class="lineno"> 856</span> local_nnz, all_A, NULL));</div>
<div class="line"><a id="l00857" name="l00857"></a><span class="lineno"> 857</span> }</div>
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno"> 858</span> }</div>
<div class="line"><a id="l00859" name="l00859"></a><span class="lineno"> 859</span>}</div>
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno"> 860</span> </div>
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno"> 861</span><span class="preprocessor">#endif</span></div>