June 2025 - mpi-forum - mailman3.cels.anl.gov

Proposal process for a side document for C++ Language Interface for MPI-5.x
by Skjellum, Anthony 26 Jun '25

26 Jun '25

Dear Wesley and Martin, how is a side document proposed to the forum? We wish to prepare a side document. Also, here is our recent EuroMPI paper describing the thinking and learning of the subcommittee on C++; we would also like to have a chance to share this at the SC25 BOF. If we can have plenary time at the next meeting, that would be good. North Carolina, right? Here is the EuroMPI paper from Arxiv: https://urldefense.us/v3/__https://www.arxiv.org/abs/2506.14610__;!!G_uCfsc… Thanks, Tony Anthony Skjellum, PhD Professor of Computer Science Director, Advanced Scalable Computing, Extreme Networks & Data (ASCEND) Center Tennessee Technological University email: askjellum(a)tntech.edu cell: +1-205-807-4968

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MPI 5.0 Voted In
by Martin Schulz 05 Jun '25

05 Jun '25

Hi all, MPI 5.0 has been voted in and the final, ratified document has been published on our website (thanks to Bill and Wes for finishing this up so quickly!): https://urldefense.us/v3/__https://www.mpi-forum.org/docs/mpi-5.0/mpi50-rep… Congratulations everyone and also a big think you to each and everyone of you in the MPI Forum who contributed to the document. Special thanks to Jeff Hammond and the ABI WG, who pushed the big change for this version, the ABI! Please all help promote the new standard – I just put this on linked-in and will try to also find other venues, but feel free to also post, repost or disseminate in any other way. Let’s get the word out. Also, if you happen to be in Hamburg next week for ISC, please drop me a note, so we can also coordinate the activities there. In other news, all four officers have been re-elected – thank you for your continued trust and support. Now, on to MPI 5.1 or MPI 6.0, depending on what we decide going forward – I am looking forward to this next chapter in MPI and our continued work in the MPI Forum! Martin -- 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(a)in.tum.de You never fail until you stop trying. (Albert Einstein)

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Re: [Mpi-forum] MPI_Psend/recv_init_c Resolution
by Wes Bland 05 Jun '25

05 Jun '25

Hi all, I discovered this morning that this PR was never merged into the repository, which means it wasn’t in the RC doc that we’ve been reviewing. There was no objection at the time and this was never going to be voted on, so I’m not proposing that we add any new votes now, but I wanted to call people’s attention to the fact that the mistake hadn’t been corrected yet, but I’m going to merge it now. So the doc that we’d publish as MPI 5.0 would include everything that was already there, plus reverting this mistake that I added at the March meeting. Sorry again for the confusion. Thanks, Wes > On Mar 21, 2025, at 11:30 AM, Wes Bland via mpi-forum <mpi-forum(a)lists.mpi-forum.org> wrote: > > This Message Is From an External Sender > This message came from outside your organization. > Hi folks, > > During the meeting in Stuttgart, we discovered some weirdness where we thought MPI_Psend_init_c and MPI_Precv_init_c should have been present in MPI 4.1, but weren’t. Failing to find any reason why that was true, we assumed it was a problem with a Git merge and I replayed those changes in PRs 1108 <https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/1…> and 1110 <https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/1…>. > > Yesterday, Ken found the place where we had discussed these specific topics in October, 2023 and decided not to put them in MPI 4.1 here <https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-issues/issues/7…>. At that time, we decided to push them out of 4.1 and address them later (which we never circled back to do) and removed the changes here <https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/9…>. > > Now that we know what happened there, I’m going to revert the PRs to put these changes back in and put us back to the situation we were in before the RCM and put this back in the Forum’s queue to discuss at some point post-MPI 5.0. You can find the PR for that here <https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/1…>. > > I’ll leave that up for a few days before proposing it gets merged just so everyone has a chance to take a look. > > Sorry about all the mess. Hopefully we’re all back to the point that we previously agreed on. > > Thanks, > Wes > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org <mailto:[email protected]> > https://urldefense.us/v3/__https://lists.mpi-forum.org/mailman/listinfo/mpi…

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June 2025 MPI Forum Meeting
by Wes Bland 04 Jun '25

04 Jun '25

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