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Subject: Re: [hwloc-users] hwloc-ps output - how to verify process binding on the core level?
From: Siew Yin Chan (sychan131_at_[hidden])
Date: 2011-02-14 01:43:44


--- On Sun, 2/13/11, Brice Goglin <Brice.Goglin_at_[hidden]> wrote:
From: Brice Goglin <Brice.Goglin_at_[hidden]>
Subject: Re: [hwloc-users] hwloc-ps output - how to verify process binding on the core level?
To: "Hardware locality user list" <hwloc-users_at_[hidden]>
Date: Sunday, February 13, 2011, 3:07 AM

=> Agree. For socket:0.core:0-3 , hwloc will bind the MPI processes to all cores in the first socket. But how are the individual processes mapped on these cores? Will it be in this order:
rank 0 à core 0rank 1 à core 1rank 2 à core 2rank 3 à core 3
Or in this *arbitrary* order:
rank 0 à core 1rank 1 à core 3rank 2 à core 0rank 3 à core 2

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