Attachment 160407 Details for Bug 250400 – Test case which shows the behaviour described.

Test case which shows the behaviour described.

setitimer.cc (text/x-c++), 1.05 KB, created by Neil Campbell on 2007-08-01 12:15:32 UTC

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Creator: Neil Campbell

Created: 2007-08-01 12:15:32 UTC

Size: 1.05 KB

patch

obsolete

>#include <sys/time.h>
>#include <pthread.h>
>#include <stdio.h>
>#include <syscall.h>
>#include <unistd.h>
>#include <math.h>
>#include <signal.h>
>#include <stdlib.h>
>#include <string.h>
>
>void sigHandler(int signo)
>{
>  fprintf(stderr, "%d: signal received\n", syscall(__NR_gettid));
>}
>
>void* thread(void* foo)
>{
>  struct itimerval itval;
>  if(0 != getitimer(ITIMER_VIRTUAL, &itval))
>  {
>    perror("getitimer");
>    exit(1);
>  }
>
>  fprintf(stderr, "itval: %d, %d, %d, %d\n", itval.it_interval.tv_sec, itval.it_interval.tv_usec, itval.it_value.tv_sec, itval.it_value.tv_usec);
>
>  for(int i=0; i < 1000000000; i++)
>  {
>    double a = sin(1.3);
>  }
>}
>
>
>int main()
>{
>  fprintf(stderr, "Main thread is %d\n", syscall(__NR_gettid));
>
>  signal(SIGVTALRM, sigHandler);
>
>  struct itimerval itval;
>  itval.it_interval.tv_sec=0;
>  itval.it_interval.tv_usec=10;
>  itval.it_value.tv_sec=0;
>  itval.it_value.tv_usec=10;
>
>  if(0 != setitimer(ITIMER_VIRTUAL, &itval, 0))
>  {
>    perror("setitimer");
>    exit(1);
>  }
>
>  pthread_t thr;
>  pthread_create(&thr, 0, thread, 0);
>  pthread_join(thr, 0);
>}

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Attachments on bug 250400: 160407