KCachegrind

KCachegrind
Valgrind

// -- $ mkdir src; vim src/hello.c --
#include <stdio.h>
#include <stdlib.h>

static int function1(int x);
static int factorial(int n);

static void function2(int i) {
  printf("%d\n", i);
  if (i == 1) {
    function1(i);
  }
}

static int function1(int x) {
  int i;
  for (i = 0; i < x; i++) {
    if (x != 1) {
      function2(x);
    } else {
      return factorial(x);
    }
  }
  return x + 1;
}

static int factorial(int n)
{
    int ans;

    if (n == 0)
    {
        ans = 1;
    }
    else
    {
        ans = n * factorial(n - 1);
    }

    return ans;
}

int main(int argc, char* argv[]) {
  int i, total, count;
 
  total = 0;

  printf("5! = %d\n", factorial(5));
  if (argc > 1) {
    count = atoi(argv[1]);
  } else {
    count = 50;
  }

  for (i = 0; i < count; i++) {
    total = function1(i);
    function2(total);
  }
  return 0;
}

// -- $ vim makefile --
all: hello
	valgrind --tool=callgrind --dump-instr=yes ./hello > /dev/null
	kcachegrind

hello: src/hello.c
	gcc -pg -g -o hello ./src/hello.c

clean:
	rm -f gmon.out hello*
	rm -f callgrind.out.*

// -- make --
$ make -i all
gcc -pg -o hello ./src/hello.c
valgrind --tool=callgrind ./hello > /dev/null
==22985== Callgrind, a call-graph generating cache profiler.
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