123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
/*
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Copyright (C) 2014-2020, Johannes Pekkila, Miikka Vaisala.
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This file is part of Astaroth.
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Astaroth is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Astaroth is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Astaroth. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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Running: benchmark -np <num processes> <executable>
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*/
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#include "astaroth.h"
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#include "astaroth_utils.h"
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#include "timer_hires.h"
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#if AC_MPI_ENABLED
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#include <mpi.h>
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#include <algorithm>
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#include <vector>
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int
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main(void)
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{
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MPI_Init(NULL, NULL);
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int nprocs, pid;
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MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
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MPI_Comm_rank(MPI_COMM_WORLD, &pid);
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// CPU alloc
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AcMeshInfo info;
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acLoadConfig(AC_DEFAULT_CONFIG, &info);
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/*
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AcMesh model, candidate;
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if (pid == 0) {
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acMeshCreate(info, &model);
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acMeshCreate(info, &candidate);
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acMeshRandomize(&model);
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acMeshRandomize(&candidate);
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}*/
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// GPU alloc & compute
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acGridInit(info);
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/*
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acGridLoadMesh(model, STREAM_DEFAULT);
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acGridIntegrate(STREAM_DEFAULT, FLT_EPSILON);
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acGridPeriodicBoundconds(STREAM_DEFAULT);
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acGridStoreMesh(STREAM_DEFAULT, &candidate);
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// Verify
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if (pid == 0) {
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acModelIntegrateStep(model, FLT_EPSILON);
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acMeshApplyPeriodicBounds(&model);
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AcResult retval = acVerifyMesh(model, candidate);
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acMeshDestroy(&model);
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acMeshDestroy(&candidate);
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if (retval != AC_SUCCESS) {
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fprintf(stderr, "Failures found, benchmark invalid. Skipping\n");
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return EXIT_FAILURE;
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}
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}*/
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// Warmup
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for (size_t i = 0; i < 10; ++i)
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acGridIntegrate(STREAM_DEFAULT, FLT_EPSILON);
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// Benchmark
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Timer t;
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const AcReal dt = FLT_EPSILON;
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const size_t num_iters = 100;
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const double nth_percentile = 0.90;
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std::vector<double> results; // ms
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results.reserve(num_iters);
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for (size_t i = 0; i < num_iters; ++i) {
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acGridSynchronizeStream(STREAM_ALL);
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timer_reset(&t);
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acGridSynchronizeStream(STREAM_ALL);
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acGridIntegrate(STREAM_DEFAULT, dt);
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acGridSynchronizeStream(STREAM_ALL);
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results.push_back(timer_diff_nsec(t) / 1e6);
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}
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std::sort(results.begin(), results.end(),
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[](const double& a, const double& b) { return a < b; });
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fprintf(stdout,
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"Integration step time %g ms (%gth percentile)--------------------------------------\n",
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results[nth_percentile * num_iters], 100 * nth_percentile);
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acGridSynchronizeStream(STREAM_ALL);
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acGridQuit();
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MPI_Finalize();
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return EXIT_SUCCESS;
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}
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#else
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int
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main(void)
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{
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printf("The library was built without MPI support, cannot run mpitest. Rebuild Astaroth with "
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"cmake -DMPI_ENABLED=ON .. to enable.\n");
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return EXIT_FAILURE;
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}
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#endif // AC_MPI_ENABLES
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