/*
 * orignal idea by Chris Friesen.  Thanks.
 */

#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>

#define THRESHOLD_USEC 2000

unsigned long long stamp()
{
        struct timeval tv;
        gettimeofday(&tv, 0);
        return (unsigned long long) tv.tv_usec + ((unsigned long long) tv.tv_sec)*1000000;
}

int main()
{
        unsigned long long thresh_ticks = THRESHOLD_USEC;
        unsigned long long cur,last;
        struct timespec ts;

        sched_rr_get_interval(0, &ts);
        printf("pid %d, prio %3d, interval of %d nsec\n", getpid(), getpriority(PRIO_PROCESS, 0), ts.tv_nsec);

        last = stamp();
        while(1) {
                cur = stamp();
                unsigned long long delta = cur-last;
                if (delta > thresh_ticks) {
                        printf("pid %d, prio %3d, out for %4llu ms\n", getpid(), getpriority(PRIO_PROCESS, 0), delta/1000);
                        cur = stamp();
                }
                last = cur;
        }

        return 0;
}