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