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

void main() {
	struct timespec requestStart, requestEnd;

	clock_gettime(CLOCK_REALTIME, &requestStart);
	usleep(1);
	clock_gettime(CLOCK_REALTIME, &requestEnd);

	long int accum = ( requestEnd.tv_sec - requestStart.tv_sec ) + ( requestEnd.tv_nsec - requestStart.tv_nsec );
	printf( "usleep(1) took %ld ns\n", accum );
}