Stephen Montgomery-Smith wrote:
This is on a recent FreeBSD-6.0 stable SMP machine.

As root, run "top -s0".  Then, at the same time run this program:

#include <pthread.h>
#define D (1<<10)
void *thread(void *n) {
  int i;
  double array[D];
  for (i=0;i<D;i++) array[i] = i;
}
int main() {
  void *i;
  pthread_t tid;
  while (1) {
    pthread_create(&tid,NULL,thread,i);
    pthread_join(tid,&i);
  }
}

Let this program run for about a minute.  Then kill this program.

At this point, I sometimes get some calcru messages from the kernel.

(This is not a contrived situation - this happens much more frequently than this sample program when I run programs with threaded fftw3 calls - I suspect that it throws off the cpu times shown by top.)

Try this,

 http://www.freebsd.org/doc/en/books/faq/book.html#CALCRU-NEGATIVE

--
Giovanni P. Tirloni
http://tirloni.blogspot.com
_______________________________________________
freebsd-stable@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[EMAIL PROTECTED]"

Reply via email to