gprof(1) Usage

gprof_test.c

#include <stdio.h>
#include <limits.h>
#include <unistd.h>

void f1(void)
{
	sleep(2);
}

unsigned int f2(unsigned int x)
{
	return(x + 1);
}

void f3(void)
{
	unsigned int x = 0;

	for(x = 0; x < UINT_MAX; x++)
		f2(x);
}

int main(int argc, char *argv[])
{
	printf("f1\n");
	f1();
	printf("f3\n");
	f3();
	return(0);
}

1. Compile: cc -pg -o test test.c
2. Run: ./test
   (file gmon.out created)
3. Print the result: gprof ./test