I am trying to measure time in C in microseconds. I tried this code, but the value time_passed
is a huge number, instead of 0 (or 1).
struct timeval start;
settimeofday(&start,NULL);
struct timeval stop;
settimeofday(&stop,NULL);
unsigned long long int time_passed =
(stop.tv_sec-start.tv_sec)*1000000 + (stop.tv_usec - start.tv_usec);
printf("time passed: %llu us\n",time_passed);
You are calling settimeofday()
when you should be calling gettimeofday()
!