Re: Inconsistent timing results of multithreaded program on an SMP machine.

[Muli Ben-Yehuda <mulix@mulix.org>]

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).

Cheers,
Muli
-- 
Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/

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