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72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/util/Profiling.h
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Copyright (C) 2018
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Author: Guido Cossu <guido.cossu@ed.ac.uk>
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This program 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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This program 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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef GRID_PERF_PROFILING_H
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#define GRID_PERF_PROFILING_H
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#include <sstream>
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#include <iostream>
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#include <functional>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <signal.h>
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struct System
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{
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static void profile(const std::string& name,std::function<void()> body) {
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std::string filename = name.find(".data") == std::string::npos ? (name + ".data") : name;
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// Launch profiler
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pid_t pid;
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std::stringstream s;
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s << getpid();
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pid = fork();
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if (pid == 0) {
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auto fd=open("/dev/null",O_RDWR);
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dup2(fd,1);
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dup2(fd,2);
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exit(execl("/usr/bin/perf","perf","record","-o",filename.c_str(),"-p",s.str().c_str(),nullptr));
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}
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// Run body
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body();
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// Kill profiler
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kill(pid,SIGINT);
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waitpid(pid,nullptr,0);
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}
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static void profile(std::function<void()> body) {
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profile("perf.data",body);
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}
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};
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#endif // GRID_PERF_PROFILING_H
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