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Subject: Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set
From: W Spector (w6ws_at_[hidden])
Date: 2013-06-04 11:20:54


On 06/04/2013 03:23 AM, Jeff Squyres (jsquyres) wrote:
> 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.

One would hope a simple MPI_Barrier call would work though...

My home linux system is nothing sophisticated. Just a quad core I-5 on
a Intel DP55WB motherboard and Ubuntu Linux. No fancy interconnects.

Walter