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Subject: Re: [OMPI users] Performance/stability impact of thread support
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-10-30 09:37:13


Short answer: yes, enabling threading impacts performance, to include silently disabling OpenFabrics support.

On Oct 30, 2012, at 6:03 AM, Paul Kapinos wrote:

> At least, be aware of silently disabling the usage of InfiniBand if 'multiple'
> threading level is activated:
>
> http://www.open-mpi.org/community/lists/devel/2012/10/11584.php
>
>
>
>
> On 10/29/12 19:14, Daniel Mitchell wrote:
>> Hi everyone,
>>
>> I've asked my linux distribution to repackage Open MPI with thread support (meaning configure with --enable-thread-multiple). They are willing to do this if it won't have any performance/stability hit for Open MPI users who don't need thread support (meaning everyone but me, apparently). Does enabling thread support impact performance/stability?
>>
>> Daniel
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
> --
> Dipl.-Inform. Paul Kapinos - High Performance Computing,
> RWTH Aachen University, Center for Computing and Communication
> Seffenter Weg 23, D 52074 Aachen (Germany)
> Tel: +49 241/80-24915
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users

-- 
Jeff Squyres
jsquyres_at_[hidden]
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