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

static long nanotime() {
    struct timespec tp;
    clock_gettime(CLOCK_MONOTONIC, &tp);
    return tp.tv_sec * 1000000000L + tp.tv_nsec;
}

static void measure_yield() {
    long times[10];
    int i;

    for (i = 0; i < 10; i++) {
        long start_time = nanotime();
        sched_yield();
        times[i] = nanotime() - start_time;
    }

    printf("[%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld]\n",
           times[0], times[1], times[2], times[3], times[4],
           times[5], times[6], times[7], times[8], times[9]);
}

int main() {
    int i;
    for (i = 0; i < 10; i++) {
        measure_yield();
    }
    return 0;
}