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Subject: Re: [OMPI users] Running OpenMPI on SGI Altix with 4096 cores : very poor performance
From: Gilbert Grosdidier (Gilbert.Grosdidier_at_[hidden])
Date: 2010-12-22 14:25:27


Hi David,

  Yes, I set mpi_affinity_alone to 1. Is that right and sufficient, please ?

  Thanks for your help, Best, G.

Le 22/12/2010 20:18, David Singleton a écrit :
>
> Is the same level of processes and memory affinity or binding being used?
>
> On 12/21/2010 07:45 AM, Gilbert Grosdidier wrote:
>> Yes, there is definitely only 1 process per core with both MPI
>> implementations.
>>
>> Thanks, G.
>>
>>
>> Le 20/12/2010 20:39, George Bosilca a écrit :
>>> Are your processes places the same way with the two MPI
>>> implementations? Per-node vs. per-core ?
>>>
>>> george.