[Beowulf] bizarre scaling behavior on a Nehalem

Tru Huynh tru at pasteur.fr
Sat Aug 15 10:28:23 EDT 2009

On Wed, Aug 12, 2009 at 01:16:02PM -0500, Rahul Nabar wrote:
> We didn't. We used the latest from the CentOS website.

Then something is not configured properly, the latest 
CentOS-5 kernel is kernel-2.6.18-128.4.1.el5.x86_64.

Linux darwin.localdomain 2.6.18-128.4.1.el5 #1 SMP Tue Aug 4 20:19:25 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

2.6.18-128.el5 is the GA released version for 5.3, not the current version

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