On Nov 2, 2005, at 7:44 AM, Carsten Kutzner wrote:
> Will a new all-to-all routine be implemented in a future version
> of LAM / OpenMPI? I am willing to contribute my code as well
> if there is interest.
We will probably not be doing any more work on LAM/MPI's collective
routines. While clearly not optimal for all cases (as you have
experienced), they do appear to be correct. At this point, we're
hesitant to do anything to regress from a correctness standpoint.
However, we are actively working on improving collective performance
in Open MPI. Our collective setup in Open MPI is a bit different
than the one in LAM, and some of the algorithms are already quite
different. The FT-MPI team from University of Tennessee is also
working on some new routines that should give better performance in a
wider range of scenarios. We would be happy to have contributions
that help improve performance in certain situations - if nothing
else, it gives us a good reference point for our work. If you are
interested, I would highly recommend trying out one of the Open MPI
release candidates, subscribing to the Open MPI developer's mailing
list, and letting us know. The Open MPI web page is, of course,
http://www.open-mpi.org/
Thanks,
Brian
--
Brian Barrett
LAM/MPI developer and all around nice guy
Have a LAM/MPI day: http://www.lam-mpi.org/
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