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https://github.com/ossrs/srs.git
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76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
/*
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The MIT License (MIT)
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Copyright (c) 2013-2014 winlin
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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@see: http://google-perftools.googlecode.com/svn/trunk/doc/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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