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Subject: Re: [OMPI devel] Defect from ticket #3079 still present in 1.6.1rc1
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-08-01 13:04:07


Yes, it really should have been fixed by now. :-\

Thanks for the nudge in reminding us -- I've bumped George to review this again (he's the owner of this particular section of code).

On Jul 30, 2012, at 6:18 AM, Iliev, Hristo wrote:

> Hello,
>
> 3 months ago I opened a ticket about an extra local data copy being made in the pairwise alltoallv implementation in the “tuned” module that can hurt performance in some cases:
>
> https://svn.open-mpi.org/trac/ompi/ticket/3079
>
> As far as I can see the milestone was set to Open MPI 1.6.1 and although it was quite trivial to fix (and I have submitted the appropriate patch with the ticket), the defect is still present in the latest revision of the 1.6 branch and also in trunk. Given that in most cluster cases OMPI ends up using “tuned” and that 1.6.1rc1 makes the pairwise algorithm the default, shouldn’t this defect have been fixed by now?
>
> Kind regards,
> Hristo Iliev
> --
> Hristo Iliev, Ph.D. -- High Performance Computing
> RWTH Aachen University, Center for Computing and Communication
> Rechen- und Kommunikationszentrum der RWTH Aachen
> Seffenter Weg 23, D 52074 Aachen (Germany)
> Tel: +49 241 80 24367 -- Fax/UMS: +49 241 80 624367
>
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-- 
Jeff Squyres
jsquyres_at_[hidden]
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