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Subject: Re: [OMPI users] OpenMPI locking up only on IB
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-07-03 08:38:27

On Jul 2, 2008, at 11:51 PM, Pavel Shamis (Pasha) wrote:

>> In trying to build 1.2.6 with the pgi compilers it makes an MPI
>> library that works with tcp, sm. But it segfaults on openib.
>> Both our intel compiler version and pgi version of 1.2.6 blow up
>> like this when we force IB. So this is a new issue.
> I have ompi 1.2.6 installed on my machines with Intel compiler
> (version 10.1) and Pgi compiler (version 7.1-5), both of them works
> with IB without any problem. BTW Mellanox provides Mellanox OFED
> binary distribution that include Intel and Pgi Open MPI 1.2.6 build.
> You can download it from here
> ofed.php
>> Is there a way to shut off early completion in 1.2.3?
> Sure, just add "--mca |pml_ob1_use_early_completion 0" to your
> command line.| ||

Note that this flag was not added until v1.2.6; it has no effect in

>> Or the the above a known issues and i should use 1.2.7-pre or grab
>> a 1.3 snap shot?
> 1.2.6 should be ok.

The upcoming v1.3 series works a little differently; there's no need
to use this flag in the v1.3 series (i.e., this flag only exists in
the v1.2 series starting with v1.2.6).

Jeff Squyres
Cisco Systems