google-pprof

  982  2020-01-14 18:00:55 google-pprof --pdf ./demo /tmp/profile > output.pdf
  983  2020-01-14 18:02:26 g++ -o demo demo.cpp -lprofiler 
  984  2020-01-14 18:02:29 ./demo 
  985  2020-01-14 18:02:40 google-pprof --pdf ./demo /tmp/profile > output.pdf
  986  2020-01-14 19:41:14 ls
  987  2020-01-14 19:41:29 vi demo.cpp 
  988  2020-01-14 19:41:49 g++ -o demo demo.cpp -lprofiler 
  989  2020-01-14 19:42:01 ./demo 
  990  2020-01-14 19:42:09 google-pprof --pdf ./demo /tmp/profile > output.pdf
  991  2020-01-14 19:43:02 google-pprof --pdf ./demo my.prof > output.pdf
  992  2020-01-14 19:43:27 g++ -o demo demo.cpp -lprofiler 
  993  2020-01-14 19:43:30 ./demo 
  994  2020-01-14 19:43:41 google-pprof --pdf ./demo my.prof > output.pdf
  995  2020-01-14 19:44:02 history 

//#include <google/profiler.h>
#include <gperftools/profiler.h>
#include <signal.h>
#include <stdlib.h>
#include <iostream>
using namespace std;

void signal_handler(int signo)
{
    signal(signo, signal_handler);
    std::cout << "recv signal " << signo << std::endl;
    //switch(signo)
    //{      
      //  case SIGTERM:
             //程序自己退出，或shell里调用kill缺省该进程。该信号可以被阻塞，或被处理
             //可以在这里做一些程序退出前的最后处理工作
             ProfilerStop();
             std::cout << "Process recieve SIGTERM" << std::endl;
        //     break;      
    //}
    exit(0);
}

void func1() {
   int i = 0;
   while (i < 100000) {
       ++i;
   }  
}
void func2() {
   int i = 0;
   while (i < 200000) {
       ++i;
   }  
}
void func3() {
   for (int i = 0; i < 1000; ++i) {
       func1();
       func2();
   }  
}
int main(){
   signal(SIGINT, &signal_handler);
   ProfilerStart("my.prof");
     func3();
   while (1) {
     func3();
   }
   ProfilerStop();
   return 0;
}