30 lines
675 B
C
30 lines
675 B
C
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#define printvi(X) printf("%s = %d\n", #X, X);
|
|
#define printvf(X) printf("%s = %lld\n", #X, X);
|
|
|
|
typedef struct timespec timespec_t;
|
|
|
|
timespec_t start, end;
|
|
|
|
long long int dtime(timespec_t *start, timespec_t *end){
|
|
return (end->tv_sec - start->tv_sec) * 1e9 + end->tv_nsec - start->tv_nsec;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
FILE* fd = fopen("plot", "w");
|
|
long long int time, time_sum;
|
|
for (int i = 0; i < 10000; ++i) {
|
|
clock_gettime(CLOCK_REALTIME, &start);
|
|
usleep(1);
|
|
clock_gettime(CLOCK_REALTIME, &end);
|
|
time = dtime(&start, &end);
|
|
time_sum += time;
|
|
fprintf(fd, "%d %lld\n", i, time);
|
|
}
|
|
}
|