#include <stdio.h>

int main()
{
	int time1, time2, sum=0;
	int i;
	int avg = 0;
	asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r" (i));

	while(sum < 100) {
		asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (time1));
		for (i = 0; i < 1000; i++);
		asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (time2));
		avg = (time2 - time1 - 5);
		printf("Loop overhead: %u\n", avg/(1000));
		sum++;
	}
}