On Feb 14, 2011, at 8:15 PM, Siew Yin Chan wrote:
> Thank you very much for your input which makes my direction pretty clear now.
> Depending on the progress of my project, I may be adventurous to try the
> nightly tarball, or may wait until a stable version is released.
FWIW, we release 1.5.2r
Jeff Squyres,
Thank you very much for your input which makes my direction pretty clear now.
Depending on the progress of my project, I may be adventurous to try the
nightly tarball, or may wait until a stable version is released.
I appreciate the hard work of the OMPI team, and am look forward
On Feb 14, 2011, at 9:35 AM, Siew Yin Chan wrote:
> 1. I tried Open MPI 1.5.1 before turning to hwloc-bind. Yep. Open MPI 1.5.1
> does provide the --bycore and --bind-to-core option, but this option seems to
> bind processes to cores on my machine according to the *physical* indexes:
FWIW, you
1. I tried Open MPI 1.5.1 before turning to hwloc-bind. Yep. Open MPI 1.5.1
does provide the --bycore and --bind-to-core option, but this option seems to
bind processes to cores on my machine according to the *physical* indexes:
-
[user@compute-0-8 ~]$ lstopo --physical
Machine (16G
On Feb 13, 2011, at 4:07 AM, Brice Goglin wrote:
>> $ mpirun -np 4 hwloc-bind socket:0.core:0-3 ./test
>>
>> 1. Does hwloc-bind map the processes *sequentially* on *successive* cores of
>> the socket?
>
> No. Each hwloc-bind command in the mpirun above doesn't know that there are
> other hwloc
Brice Goglin, le Mon 14 Feb 2011 07:56:56 +0100, a écrit :
> The operating system decides where each process runs (according to the
> binding). It usually has no knowledge of MPI ranks. And I don't think it looks
> at the PID numbers during the scheduling.
It doesn't either, indeed.
Samuel
Le 14/02/2011 07:43, Siew Yin Chan a écrit :
>
>>
>>
>
> No. Each hwloc-bind command in the mpirun above doesn't know that
> there are other hwloc-bind instances on the same machine. All of
> them bind their process to all cores in the first socket.
>
> => Agree. For socket:0.core:0-3 ,
--- On Sun, 2/13/11, Brice Goglin wrote:
From: Brice Goglin
Subject: Re: [hwloc-users] hwloc-ps output - how to verify process binding on
the core level?
To: "Hardware locality user list"
List-Post: hwloc-users@lists.open-mpi.org
Date: Sunday, February 13, 2011, 3:07 AM
Le 13/02/2011