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Subject: Re: [OMPI users] Using orterun to start jobs with numactl
From: Ralph Castain (rhc_at_[hidden])
Date: 2012-02-20 17:43:21


You probably want to use the rank file mapper and/or the slot_list capability. See the following for more info:

http://www.open-mpi.org/faq/?category=tuning#using-paffinity-v1.3

On Feb 20, 2012, at 1:05 PM, Jeff Layton wrote:

> Good afternoon,
>
> I'm working with some AMD Interlagos nodes (16-core, 4-socket),
> and I want to bind processes to cores in specific layouts. These
> may not be in logical order so I need to be able to my MPI app
> and point it to specific cores on specific nodes (although the
> core ordering is the same for all nodes).
>
> I'm assuming I need to "manually" start the processes using
> orted (or orterun) and numactl on the specific cores. Since I've
> never used orted or orterun to start jobs and I'm struggling with
> the man pages a bit - any suggestions?
>
> Thanks!
>
> Jeff
>
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