Time on Ecos (or Qemu )

I'm working with real time operating system Ecos. I run this code on ubuntu :

   # include <stdio.h>
   # include <sys/time.h>
   # include <unistd.h>
    
    static int tv_diff(struct timeval *t1, struct timeval *t2)
    {
        return
            (t1->tv_sec - t2->tv_sec) * 1000 +
            (t1->tv_usec - t2->tv_usec) / 1000;
    }
    
    int main(void)
    {
    struct timespec ts;
    struct timeval tv1, tv2;
    
    printf("Hello, eCos !\n");
    
    clock_gettime(1, &ts);
    tv1.tv_sec = ts.tv_sec;
    tv1.tv_usec = ts.tv_nsec / 1000;
    printf("Time: %ld \n", tv1.tv_sec);
    sleep(10);
    clock_gettime(1, &ts);
    tv2.tv_sec = ts.tv_sec;
    tv2.tv_usec = ts.tv_nsec / 1000;
    
    printf("Time: %ld \n", tv2.tv_sec);
    
    printf("diff Time: %d \n", tv_diff(&tv2, &tv1));
    
        return 0;
    }

and it worked properly :

root@ubuntu:/home/feres/Bureau# ./amin

Hello, eCos !

Time: 45417

Time: 45427

diff Time: 10000

But when i run it on Ecos ( wich it work on Qemu ) it give me this results:

Hello, eCos !

Time: 0

Time: 0

diff Time: 0

Is there any missing package on Ecos (or Qemu) or is there any specific commande to get time on Ecos (or Qemu)?