Debian >> Memory

如何使用kcachegrind查看呼叫順序

---

main.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
 
void test1(void)
{
  for(int x=0; x<100; x++);
}
 
void test2(void)
{
  usleep(1);
}
 
void test3(void)
{
  usleep(100);
}
 
int main(int argc, char** argv)
{
  while(1){
    test1();
    test2();
    test3();
  }
}

編譯並且執行

$ gcc main.c -o main -ggdb
$ valgrind --tool=callgrind ./main
    ==7937== Callgrind, a call-graph generating cache profiler
    ==7937== Copyright (C) 2002-2017, and GNU GPL'd, by Josef Weidendorfer et al.
    ==7937== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
    ==7937== Command: ./main
    ==7937== 
    ==7937== For interactive control, run 'callgrind_control -h'.

按下Ctrl + C結束並且執行如下程式

$ kcachegrind callgrind.out.xxx

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