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

Wesley Bland work at wesbland.com
Wed Mar 24 17:12:49 CDT 2021


Which thing specifically is broken in 4.0 that wasn’t broken in 3.1?

> On Mar 24, 2021, at 5:09 PM, Rolf Rabenseifner via mpi-forum <mpi-forum at lists.mpi-forum.org> wrote:
> 
> Dear Martin, Bill and Wesley and all,
> 
>> Please let us know if you have any questions or concerns - we will also address
>> this in the meeting next week.
> 
> Issue 466 is read at the February meeting and contains required corrections
> to the current version of the draft (mpi-4-rc-june), which includes unintented
> changes to the MPI-3.1 I/O interface. Therefore, it cannot be posponed to MPI-4.1.
> 
> Best regards
> Rolf
> 
> ----- 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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> 
> -- 
> 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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