mirror of
https://github.com/OPM/opm-simulators.git
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149 lines
3.4 KiB
C++
149 lines
3.4 KiB
C++
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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// vi: set et ts=4 sw=4 sts=4:
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/*
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This file is part of the Open Porous Media project (OPM).
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OPM 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 2 of the License, or
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(at your option) any later version.
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OPM 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 OPM. If not, see <http://www.gnu.org/licenses/>.
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Consult the COPYING file in the top-level source directory of this
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module for the precise wording of the license and the list of
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copyright holders.
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*/
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#include <config.h>
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#include <opm/models/utils/timer.hpp>
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#if HAVE_MPI
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#include <mpi.h>
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#endif
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namespace Opm {
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void Timer::TimeData::measure()
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{
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// Note: On Linux -- or rather fully POSIX compliant systems -- using
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// clock_gettime() would be more accurate for the CPU time.
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realtimeData = std::chrono::high_resolution_clock::now();
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cputimeData = std::clock();
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}
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Timer::Timer()
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{
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halt();
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}
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void Timer::start()
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{
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isStopped_ = false;
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startTime_.measure();
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}
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double Timer::stop()
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{
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if (!isStopped_) {
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TimeData stopTime;
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stopTime.measure();
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const auto& t1 = startTime_.realtimeData;
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const auto& t2 = stopTime.realtimeData;
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std::chrono::duration<double> dt =
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std::chrono::duration_cast<std::chrono::duration<double> >(t2 - t1);
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realTimeElapsed_ += dt.count();
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cpuTimeElapsed_ +=
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static_cast<double>(stopTime.cputimeData
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- startTime_.cputimeData)/CLOCKS_PER_SEC;
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}
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isStopped_ = true;
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return realTimeElapsed_;
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}
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void Timer::halt()
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{
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isStopped_ = true;
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cpuTimeElapsed_ = 0.0;
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realTimeElapsed_ = 0.0;
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}
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void Timer::reset()
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{
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cpuTimeElapsed_ = 0.0;
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realTimeElapsed_ = 0.0;
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startTime_.measure();
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}
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double Timer::realTimeElapsed() const
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{
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if (isStopped_)
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return realTimeElapsed_;
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TimeData stopTime;
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stopTime.measure();
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const auto& t1 = startTime_.realtimeData;
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const auto& t2 = stopTime.realtimeData;
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std::chrono::duration<double> dt =
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std::chrono::duration_cast<std::chrono::duration<double> >(t2 - t1);
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return realTimeElapsed_ + dt.count();
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}
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double Timer::cpuTimeElapsed() const
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{
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if (isStopped_)
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return cpuTimeElapsed_;
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TimeData stopTime;
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stopTime.measure();
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const auto& t1 = startTime_.cputimeData;
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const auto& t2 = stopTime.cputimeData;
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return cpuTimeElapsed_ + static_cast<double>(t2 - t1)/CLOCKS_PER_SEC;
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}
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double Timer::globalCpuTimeElapsed() const
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{
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double val = cpuTimeElapsed();
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double globalVal = val;
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#if HAVE_MPI
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MPI_Reduce(&val,
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&globalVal,
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/*count=*/1,
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MPI_DOUBLE,
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MPI_SUM,
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/*rootRank=*/0,
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MPI_COMM_WORLD);
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#endif
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return globalVal;
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}
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Timer& Timer::operator+=(const Timer& other)
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{
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realTimeElapsed_ += other.realTimeElapsed();
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cpuTimeElapsed_ += other.cpuTimeElapsed();
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return *this;
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}
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} // namespace Opm
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