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60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
//
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// Copyright (c) 2013-2021 Winlin
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//
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// SPDX-License-Identifier: MIT
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//
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/**
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@see: https://gperftools.github.io/gperftools/cpuprofile.html
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config srs with gperf(to make gperftools):
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./configure --with-gperf --jobs=3
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set the pprof path if not set:
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export PPROF_PATH=`pwd`/../../../objs/pprof
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to do cpu profile:
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make && rm -f ./srs.prof* && env CPUPROFILE=./srs.prof ./cpu_profiler
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$PPROF_PATH --text cpu_profiler ./srs.prof*
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to do cpu profile by signal:
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make && rm -f ./srs.prof* && env CPUPROFILE=./srs.prof CPUPROFILESIGNAL=12 ./cpu_profiler
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$PPROF_PATH --text cpu_profiler ./srs.prof*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <gperftools/profiler.h>
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void cpu_profile_imp() {
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for (int i = 0; i < 2; ++i) {
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for (int j = 0; j < 110 * 1024 * 1024; ++j) {
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}
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printf("cpu profile, loop 110M\n");
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printf("press CTRL+C if you want to abort the program.\n");
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sleep(3);
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}
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}
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void cpu_profile() {
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cpu_profile_imp();
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}
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void handler(int sig) {
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exit(0);
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}
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int main(int argc, char** argv) {
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signal(SIGINT, handler);
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// must start profiler manually.
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ProfilerStart(NULL);
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if (getenv("CPUPROFILESIGNAL")) {
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printf("if specified CPUPROFILESIGNAL, use signal to active it: kill -12 %d\n", getpid());
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sleep(3);
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}
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cpu_profile();
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// not neccessary to call stop.
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//ProfilerStop();
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return 0;
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}
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