[torqueusers] Re: Torque 2.3.0 cpusets broken [PATCH] (was Fwd: [torquedev] Quick test report of cpuset support)

Chris Samuel csamuel at vpac.org
Mon Apr 7 16:53:28 MDT 2008


----- "Steve Snelgrove" <ssnelgrove at clusterresources.com> wrote:

> I have applied the supplied patch and built a new snapshot with this 
> included.

Thanks Steve.

It has exposed an oddity in OpenMPI though, whereas
both the OSC mpiexec and pbsdsh do TM requests for
each vnode separately OpenMPI appears to make one TM
request *per node*, and then fork the tasks on that node.

This means that with cpusets working all the OpenMPI
processes for a job on a node end up locked to the
same core! :-(

Argh..

cheers,
Chris
-- 
Christopher Samuel - (03) 9925 4751 - Systems Manager
 The Victorian Partnership for Advanced Computing
 P.O. Box 201, Carlton South, VIC 3053, Australia
VPAC is a not-for-profit Registered Research Agency


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