[torqueusers] Re: [torquedev] First Torque impressions on Altix

Chris Samuel csamuel at vpac.org
Sun Jan 11 16:58:13 MST 2009


----- "Michel Béland" <michel.beland at rqchp.qc.ca> wrote:

> One another problem with Torque on Altix is that it
> ignores boot cpusets.

Yes, that's a known problem in the 2.3 implementation;
it assumes that it can do a mapping from the vnode
supplied by the scheduler (node001/0) to the core number.

This doesn't work on sites that have core 0 in the boot
CPU set or are overcommitting cores on nodes. :-(

As a work around for boot cpusets you could alter your
RC scripts to put the last core, rather than the first,
into the boot set and as long as you have N-1 cores
defined in your nodes file then you're probably OK as
the scheduler will not then allocate core N.

Unfortunately not having a system that uses boot
cpusets I can't test it. :-(

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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