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PThread and More Than 1 Core

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# 1  
Old 07-27-2008
PThread and More Than 1 Core
Hello all.

I have made an application in C using pthreads. My problem is that my program seems to be only using 1 of my cores when I create multiple threads. I have 4 cores (Q9300). I am using Ubuntu 8.04.

I do believe the problem is that on linkage it's using a pthread emulation package rather than the real thing?

Either way how do I solve this problem?

Many thanks.
# 2  
Old 07-28-2008
pthread_set_concurrency ?
# 3  
Old 07-28-2008
Quote:
Originally Posted by Sivaswami
pthread_set_concurrency ?
Didn't resolve the problem.
# 4  
Old 07-28-2008
What makes you think it is using a pthread emulation package rather than the real thing?
# 5  
Old 07-29-2008
A pthread emulation package that is written to demonstrate 'thread like' behavior would only run uniprocessor in any case, right? I assume they are using some event mechanism for this emulation.

Use real threads for concurrency and smp is the easy answer, otherwise don't worry if
performance is acceptable I guess. My .02.
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