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Subject: Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2013-06-04 06:23:19


On Jun 3, 2013, at 5:06 AM, Paul Kapinos <kapinos_at_[hidden]> wrote:

> It is more or less well-known that MPI_THREAD_MULTIPLE disable the OpenFabric / InfiniBand networking in Open MPI:
>
> http://www.open-mpi.org/faq/?category=supported-systems#thread-support
> http://www.open-mpi.org/community/lists/users/2010/03/12345.php

Yes, this is true -- MPI_THREAD_MULITPLE support is fairly incomplete in Open MPI.

> On our system not only the 'openib' BTL is off, but also the IPoIB denies to work, leading to error.

That's odd -- are you saying that the TCP BTL doesn't work with IPoIB? I can't think of why that would be the case.

-- 
Jeff Squyres
jsquyres_at_[hidden]
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