[Mpi-forum] Process towards MPI 4.0 / Final Steps

Rolf Rabenseifner rabenseifner at hlrs.de
Tue Mar 30 04:03:08 CDT 2021

Dear Martin, Wesley, Bill and all,

> Please let us know if you have any questions or concerns - we will also address
> this in the meeting next week.

I detected that also Issue (K=) 468 was moved to MPI-4.1.

I updated the issues's abstract with a summary of the discussion
(which was partially within the Parrived progress discussion)
at the Feb. 2021 meeting.

Adding a 4th such test routine (after MPI_Test, Request_get_status, Win_test, Parrived),
it gets significantly more evident if for only one routine, Request_get_status, 
there is no such written progress guarantee in the standard.

Therefore, we did this analysis and reading of adding at the Feb. meeting 
for voting it into the standard in June.

There is no reason to break this result from the Feb. 2021 meeting.

Therefore, I put https://github.com/mpi-forum/mpi-issues/issues/468
back to the triage.

@Martin please put it for tomorrow on the agenda.

Best regards

----- Original Message -----
> From: "Main MPI Forum mailing list" <mpi-forum at lists.mpi-forum.org>
> To: "Main MPI Forum mailing list" <mpi-forum at lists.mpi-forum.org>
> Cc: "Martin Schulz" <schulzm at in.tum.de>
> Sent: Wednesday, March 24, 2021 7:55:11 PM
> Subject: [Mpi-forum] Process towards MPI 4.0 / Final Steps

> Hi all,
> For those of you who had to miss the virtual MPI Forum meeting today, we had a
> discussion on the updated process towards MPI 4.0 and how to handle the final
> tickets.
> The recording is at (with the right time-marker to this discussion):
> https://youtu.be/h9MO-BmbfdQ?t=2125
> The slides are at:
> https://github.com/mpi-forum/mpi-forum.github.io/raw/master/slides/2021/03/2021-03-24-rcm-frm-procedures.pptx
> The quick summary is that we will limit the tickets that are still considered
> for MPI 4.0 to only emergency fixes that avoid breaking the standard and that
> are directly related to new items/procedures/concepts/text added specifically
> for MPI 4.0. Otherwise we fear (and we are seeing this already) that we may get
> clogged up with more and more changes that will not get the needed vetting and
> - equally important - that we run the risk of some issues not being accepted
> during the vote, which means the FRM is not the final document, which is
> problematic.
> Wesley will be going through the board and classifying all issues based on that
> (see also slide 11) and then move tickets that do not meet the criteria to MPI
> 4.1 (changes that are already in, will stay , though). For this, we agreed to
> temporarily assume the role of a release manager that will advance tickets once
> they are ready (and that includes sufficient reviews by the CCs) and meet the
> criteria.
> Note, though, this does not mean that the items tagged as 4.1 are postponed
> indefinitely - the plan is to start working on them right after MPI 4.0, if
> time permits, already in the June meeting. We should strive for getting a
> cleaned-up MPI 4.1 out the door soon, preferably before we add (m)any new
> items, but that part we will also discuss in the June meeting.
> Please let us know if you have any questions or concerns - we will also address
> this in the meeting next week.
> Thanks!
> Martin
> (also in the name of Bill and Wesley)
> --
> Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems
> Department of Informatics, TU-Munich, Boltzmannstraße 3, D-85748 Garching
> Member of the Board of Directors at the Leibniz Supercomputing Centre (LRZ)
> Email: schulzm at in.tum.de
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> mpi-forum at lists.mpi-forum.org
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Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner at hlrs.de .
High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 .
University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 .
Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner .
Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307) .

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