[mpi3-coll] July/August telecon

Christian Siebert siebert at it.neclab.eu
Thu Jul 31 05:11:50 CDT 2008

Torsten Hoefler wrote:
> On Mon, Jul 28, 2008 at 10:13:49AM -0400, Torsten Hoefler wrote:
>> 4) Updates on MPI Plans (I have a slightly different
>>    proposal/implementation than Christian for the same thing)
> I just added my proposal to the wiki in case anybody wants to take a
> look at it before or during the telecon:
> https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/MPIplans 
> (scroll down to the bottom).
Thanks Torsten!

And for completeness, I attached my interface proposal for "MPI plans" 
to the same wiki page (very bottom). Alternatively the direct link is:


This description has already been revised a couple of times, and is 
since 10th of July in a quite stable and hopefully complete state. A 
second implementation (independent of Torsten's 
reference-implementation) for NEC's proprietary MPI has been completed 
and is currently evaluated/tuned in application contexts.

The difference to Torsten's proposal is quite small and is mainly based 
on the question if we should give some memory management things to the 
programmer (because she might know already how large the plan will 
become) or hide all these aspects. I'm locking forward to discuss the 
advantages/disadvantages of both ways with the audience.

Best regards,

PS: Since April there is also a first draft for persistent collectives 
in the wiki (see appropriate section). The direct link is


Christian Siebert, Dipl.-Inf.               Research Associate

            NEC Laboratories Europe, NEC Europe Ltd.
        Rathausallee 10, D-53757 Sankt Augustin, Germany

Phone: +49 (0) 2241 - 92 52 44    Fax: +49 (0) 2241 - 92 52 99

  (Registered Office: 1 Victoria Road, London W3 6BL, 2832014)

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