Re: Inconsistent timing results of multithreaded program on an SMPmachine.

From: Muli Ben-Yehuda
Date: Sun Nov 20 2005 - 05:39:49 EST

On Sun, Nov 20, 2005 at 09:28:13PM +1100, Con Kolivas wrote:

> Ok I've had a look at the actual program now ;) Are you timing the time it
> takes to completion of everything?
> This part of your program:
> for (i= 0; i<8; i++)
> pthread_join(tid[i], NULL);
> Cares about the order the threads finish. Do you think this might be affecting
> your results?

I don't see why it should matter. Depending on the order the threads
finish, we will always wait in pthread_join until the last one
finishes, and then do between 0 and 7 more pthread_joins that should
return immediately (since the last one has already finished).

Muli Ben-Yehuda |

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at