src/gromacs/mdrunutility/tests/threadaffinity_mpi.cpp

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  35 #include "gmxpre.h"
  36
  37 #include <array>
  38
  39 #include <gtest/gtest.h>
  40
  41 #include "gromacs/utility/basenetwork.h"
  42
  43 #include "testutils/mpitest.h"
  44
  45 #include "threadaffinitytest.h"
  46
  47 namespace
  48 {
  49
  50 using gmx::test::ThreadAffinityTestHelper;
  51
  52 TEST(ThreadAffinityMultiRankTest, PinsWholeNode)
  53 {
  54     GMX_MPI_TEST(4);
  55     ThreadAffinityTestHelper helper;
  56     helper.setLogicalProcessorCount(4);
  57     helper.expectPinningMessage(false, 1);
  58     helper.expectAffinitySet(gmx_node_rank());
  59     helper.setAffinity(1);
  60 }
  61
  62 TEST(ThreadAffinityMultiRankTest, PinsWithOffsetAndStride)
  63 {
  64     GMX_MPI_TEST(4);
  65     ThreadAffinityTestHelper helper;
  66     helper.setAffinityOption(ThreadAffinity::On);
  67     helper.setOffsetAndStride(1, 2);
  68     helper.setLogicalProcessorCount(8);
  69     helper.expectWarningMatchingRegex("Applying core pinning offset 1");
  70     helper.expectPinningMessage(true, 2);
  71     helper.expectAffinitySet(1 + 2 * gmx_node_rank());
  72     helper.setAffinity(1);
  73 }
  74
  75 TEST(ThreadAffinityMultiRankTest, PinsTwoNodes)
  76 {
  77     GMX_MPI_TEST(4);
  78     ThreadAffinityTestHelper helper;
  79     helper.setPhysicalNodeId(gmx_node_rank() / 2);
  80     helper.setLogicalProcessorCount(2);
  81     helper.expectPinningMessage(false, 1);
  82     helper.expectAffinitySet(gmx_node_rank() % 2);
  83     helper.setAffinity(1);
  84 }
  85
  86 TEST(ThreadAffinityMultiRankTest, DoesNothingWhenDisabled)
  87 {
  88     GMX_MPI_TEST(4);
  89     ThreadAffinityTestHelper helper;
  90     helper.setAffinityOption(ThreadAffinity::Off);
  91     helper.setLogicalProcessorCount(4);
  92     helper.setAffinity(1);
  93 }
  94
  95 TEST(ThreadAffinityMultiRankTest, HandlesTooManyThreadsWithAuto)
  96 {
  97     GMX_MPI_TEST(4);
  98     ThreadAffinityTestHelper helper;
  99     helper.setLogicalProcessorCount(6);
 100     helper.expectWarningMatchingRegex("Oversubscribing the CPU");
 101     helper.setAffinity(2);
 102 }
 103
 104 TEST(ThreadAffinityMultiRankTest, HandlesTooManyThreadsWithForce)
 105 {
 106     GMX_MPI_TEST(4);
 107     ThreadAffinityTestHelper helper;
 108     helper.setAffinityOption(ThreadAffinity::On);
 109     helper.setLogicalProcessorCount(6);
 110     helper.expectWarningMatchingRegex("Oversubscribing the CPU");
 111     helper.setAffinity(2);
 112 }
 113
 114 class ThreadAffinityHeterogeneousNodesTest : public ::testing::Test
 115 {
 116 public:
 117     static int  currentNode() { return gmx_node_rank() / 2; }
 118     static int  indexInNode() { return gmx_node_rank() % 2; }
 119     static bool isMaster() { return gmx_node_rank() == 0; }
 120
 121     static void setupNodes(ThreadAffinityTestHelper* helper, std::array<int, 2> cores)
 122     {
 123         const int node = currentNode();
 124         helper->setPhysicalNodeId(node);
 125         helper->setLogicalProcessorCount(cores[node]);
 126     }
 127     static void expectNodeAffinitySet(ThreadAffinityTestHelper* helper, int node, int core)
 128     {
 129         if (currentNode() == node)
 130         {
 131             helper->expectAffinitySet(core);
 132         }
 133     }
 134 };
 135
 136 TEST_F(ThreadAffinityHeterogeneousNodesTest, PinsOnMasterOnly)
 137 {
 138     GMX_MPI_TEST(4);
 139     ThreadAffinityTestHelper helper;
 140     helper.setAffinityOption(ThreadAffinity::On);
 141     setupNodes(&helper, { { 2, 1 } });
 142     helper.expectWarningMatchingRegexIf("Oversubscribing the CPU", isMaster() || currentNode() == 1);
 143     if (currentNode() == 0)
 144     {
 145         helper.expectPinningMessage(false, 1);
 146     }
 147     expectNodeAffinitySet(&helper, 0, indexInNode());
 148     helper.setAffinity(1);
 149 }
 150
 151 TEST_F(ThreadAffinityHeterogeneousNodesTest, PinsOnNonMasterOnly)
 152 {
 153     GMX_MPI_TEST(4);
 154     ThreadAffinityTestHelper helper;
 155     helper.setAffinityOption(ThreadAffinity::On);
 156     setupNodes(&helper, { { 1, 2 } });
 157     helper.expectWarningMatchingRegexIf("Oversubscribing the CPU", currentNode() == 0);
 158     if (currentNode() == 1)
 159     {
 160         helper.expectPinningMessage(false, 1);
 161     }
 162     expectNodeAffinitySet(&helper, 1, indexInNode());
 163     helper.setAffinity(1);
 164 }
 165
 166 TEST_F(ThreadAffinityHeterogeneousNodesTest, HandlesUnknownHardwareOnNonMaster)
 167 {
 168     GMX_MPI_TEST(4);
 169     ThreadAffinityTestHelper helper;
 170     helper.setAffinityOption(ThreadAffinity::On);
 171     setupNodes(&helper, { { 2, 0 } });
 172     helper.expectWarningMatchingRegexIf("No information on available cores",
 173                                         isMaster() || currentNode() == 1);
 174     if (currentNode() == 0)
 175     {
 176         helper.expectPinningMessage(false, 1);
 177     }
 178     expectNodeAffinitySet(&helper, 0, indexInNode());
 179     helper.setAffinity(1);
 180 }
 181
 182 TEST_F(ThreadAffinityHeterogeneousNodesTest, PinsAutomaticallyOnMasterOnly)
 183 {
 184     GMX_MPI_TEST(4);
 185     ThreadAffinityTestHelper helper;
 186     setupNodes(&helper, { { 2, 1 } });
 187     helper.expectWarningMatchingRegexIf("Oversubscribing the CPU", isMaster() || currentNode() == 1);
 188     if (currentNode() == 0)
 189     {
 190         helper.expectPinningMessage(false, 1);
 191     }
 192     expectNodeAffinitySet(&helper, 0, indexInNode());
 193     helper.setAffinity(1);
 194 }
 195
 196 TEST_F(ThreadAffinityHeterogeneousNodesTest, PinsAutomaticallyOnNonMasterOnly)
 197 {
 198     GMX_MPI_TEST(4);
 199     ThreadAffinityTestHelper helper;
 200     setupNodes(&helper, { { 1, 2 } });
 201     helper.expectWarningMatchingRegexIf("Oversubscribing the CPU", currentNode() == 0);
 202     if (currentNode() == 1)
 203     {
 204         helper.expectPinningMessage(false, 1);
 205     }
 206     expectNodeAffinitySet(&helper, 1, indexInNode());
 207     helper.setAffinity(1);
 208 }
 209
 210 TEST_F(ThreadAffinityHeterogeneousNodesTest, HandlesInvalidOffsetOnNonMasterOnly)
 211 {
 212     GMX_MPI_TEST(4);
 213     ThreadAffinityTestHelper helper;
 214     helper.setAffinityOption(ThreadAffinity::On);
 215     helper.setOffsetAndStride(2, 0);
 216     setupNodes(&helper, { { 4, 2 } });
 217     helper.expectWarningMatchingRegex("Applying core pinning offset 2");
 218     helper.expectWarningMatchingRegexIf("Requested offset too large", isMaster() || currentNode() == 1);
 219     if (currentNode() == 0)
 220     {
 221         helper.expectPinningMessage(false, 1);
 222     }
 223     expectNodeAffinitySet(&helper, 0, indexInNode() + 2);
 224     helper.setAffinity(1);
 225 }
 226
 227 TEST_F(ThreadAffinityHeterogeneousNodesTest, HandlesInvalidStrideOnNonMasterOnly)
 228 {
 229     GMX_MPI_TEST(4);
 230     ThreadAffinityTestHelper helper;
 231     helper.setAffinityOption(ThreadAffinity::On);
 232     helper.setOffsetAndStride(0, 2);
 233     setupNodes(&helper, { { 4, 2 } });
 234     helper.expectWarningMatchingRegexIf("Requested stride too large", isMaster() || currentNode() == 1);
 235     if (currentNode() == 0)
 236     {
 237         helper.expectPinningMessage(true, 2);
 238     }
 239     expectNodeAffinitySet(&helper, 0, 2 * indexInNode());
 240     helper.setAffinity(1);
 241 }
 242
 243 } // namespace