Search found 4 matches

by pedrito
2011/05/11 09:58:50
Forum: CentOS 5 - X86_64,s390(x) and PowerPC Support
Topic: Problems with slow calls to pthread_condition_signal
Replies: 8
Views: 7843

Re: Problems with slow calls to pthread_condition_signal

[quote]
TrevorH wrote:
You can yum install gcc44 on CentOSto get (I think) 4.4.5 as an alternative C compiler suite.[/quote]

We have gcc-4.4.4 installed and I've just tried it, but as far as I could tell, it still links to the old pthread library, which seems to be part of glibc.

Cheers, Pedro
by pedrito
2011/05/11 09:55:11
Forum: CentOS 5 - X86_64,s390(x) and PowerPC Support
Topic: Problems with slow calls to pthread_condition_signal
Replies: 8
Views: 7843

Re: Problems with slow calls to pthread_condition_signal

Hi Pschaff, Thanks for the information! The machine I'm working on is part of a larger high-performance cluster with hundreds of users, so updates are a bit of a difficult thing to get through... Is there any way of checking what version of libpthread the most recent CentOS release uses? Cheers, Pedro
by pedrito
2011/05/10 19:33:33
Forum: CentOS 5 - X86_64,s390(x) and PowerPC Support
Topic: Problems with slow calls to pthread_condition_signal
Replies: 8
Views: 7843

Re: Problems with slow calls to pthread_condition_signal

Perhaps a short update: I noticed that the default compiler on the CentOS system is gcc 4.1.2 and that it uses a perhaps somewhat outdated libpthread-2.5. The 16-core Ubuntu system on which the code runs ok has libpthread-2.11 and the Core i5 system has libpthread-2.13. I am currently trying to see ...
by pedrito
2011/05/10 11:33:44
Forum: CentOS 5 - X86_64,s390(x) and PowerPC Support
Topic: Problems with slow calls to pthread_condition_signal
Replies: 8
Views: 7843

Problems with slow calls to pthread_condition_signal

Hello, I'm currently running some benchmarks of a shared-memory parallel code on a 16-Core system (4xQuad-Core AMD Opteron 8380) running CentOS 5 (Linux 2.6.18-194.17.1.el5 #1 SMP Wed Sep 29 12:50:31 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux). My code uses pthread_cond_wait and pthread_cond_signal ext...

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