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

int main(int argc, char **argv)
{
    int i, j, k, total;
    struct rusage resUsage1, resUsage2;
    struct timespec ts = { 0, 1000 };

    if (getrusage (RUSAGE_SELF, &resUsage1) == -1)
        errx(1, "getrusage");


    /* simulate some activity */
    for( i=0; i<1000; i++ )
    {
        for( j=0; j<1000; j++ )
        {
	    void *p = mmap(0, 1024 * 1024, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
	    munmap(p, 1024 * 1024);
            total = j * i;
            for( k=0; k<1000; k++ )
            {
                total += k + i;
            }
        }
    }

    if (getrusage (RUSAGE_SELF, &resUsage2) == -1)
        errx(1, "getrusage");

    printf("kernel1 %ld.%06ld\n", resUsage1.ru_stime.tv_sec, resUsage1.ru_stime.tv_usec);
    printf("kernel2 %ld.%06ld\n", resUsage2.ru_stime.tv_sec, resUsage2.ru_stime.tv_usec);

    printf("user1 %ld.%06ld\n", resUsage1.ru_utime.tv_sec, resUsage1.ru_utime.tv_usec);
    printf("user2 %ld.%06ld\n", resUsage2.ru_utime.tv_sec, resUsage2.ru_utime.tv_usec);

    return 0;
}