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Date: Tue, 29 Jun 2010 23:38:54 +0200
From: "Magnum, P.I." <>
Subject: Re: mpirun, rules and lazy cores

On 06/29/2010 02:26 PM, wrote:
> only 1 core is active, others with very low activity

What happens if you stop the job and resume it? Try that several times 
and see if you get varying results.

What version of the MPI framework are you using, OpenMPI? I've had some 
spurious weird problems with OpenMPI that disappeared when upgrading to 
latest stable. I've never seen it happen under MPICH2.


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