ITERATIONS
for (count=0; count<ITERATIONS; count++) {
unsigned long elapsed_times[ITERATIONS];
for (i=1; i<ITERATIONS; i++) {
printf("mean latency: %f\n", (double)sum / ITERATIONS / PASSES);
memset(elapsed_times, 0, ITERATIONS);
for (i=0; i<ITERATIONS; i++) {
(1000*(overhead))/ITERATIONS);
(1000*(libcall-overhead))/ITERATIONS);
(1000*(syscall-overhead))/ITERATIONS);