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:
> 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:
> 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, shouldnt 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
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