August 2020 - mpi-forum - mailman3.cels.anl.gov

Re: [Mpi-forum] Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday
by Guillaume Mercier 03 Aug '20

03 Aug '20

Hi all, The Hardware Topologies Working Group wants to announce the first vote for the MPI_Cart_create_weighted / Topology aware Cartesian communicators: Annotated pdf as read in the June 2020 meeting: https://github.com/mpi-forum/mpi-issues/files/4823780/mpi-report-issue120-t… Issue https://github.com/mpi-forum/mpi-issues/issues/120 PR#98 https://github.com/mpi-forum/mpi-standard/pull/98 This is one of the tickets for MPI-4.0 for performance enhancements. It fills the gap that the MPI-1.1 MPI_Dims_create wasn't hardware nor application topology aware. For this, it combines both functionalities, - the factorization of #processes into the given number of dimensions (as non-hardware/application aware in MPI_Dims_create) - the reordering of the processes and providing comm_cart (as in MPI_Cart_create) into one new hardware & application aware routine: MPI_Cart_create_weighted. The hardware awareness comes through the old_comm, the application awareness through the weights. The design of the interface was developed with the help of many forum members (thanks a lot!) and is along the principles we already use for the weights for graph topologies for application topology awareness. This also means, there is enough room for further research and development through an info argument to allow additional features in the future or for specific vendor platforms. The interface is as simple as possible according to the main goal of MPI as defined on page 1 of all MPI standards: "The goal of the Message-Passing Interface simply stated is to develop a widely used standard for writing message-passing programs. As such the interface should establish a practical, portable, efficient, and flexible standard for message passing." For Cartesian applications, the new interface fulfills this short list of being "practical, portable, efficient, and flexible" and can be widely used for all applications that use already the old MPI-1.1 interface MPI_Dims_create + MPI_Cart_create to realize better hardware-awareness and to allow also application-awareness through the new weights. And for portable development of MPI applications, it is equally important that the new interface is part of the MPI standard as it was for the old Cartesian interface. In addition, best optimization may require knowledge of the hardware which may not be disclosed to the public which would prevent third party solutions - this serves as second argument to vote the new interface into the MPI library. Therefore, we'll be glad if you vote for this new performance oriented interface for MPI-4.0. And thank you for reading this announcement to the end. Best regards, Guillaume and the Hardware Topologies Working Group

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First vote for Issue #96
by Bangalore, Purushotham 03 Aug '20

03 Aug '20

Hi All, The Semantic Terms WG would like to announce the first vote for issue #96 - Update to Semantic Terms Section, here are the details: Issue: https://github.com/mpi-forum/mpi-issues/issues/96 PR: https://github.com/mpi-forum/mpi-standard/pull/116 Latest PDF file: mpi40-report-ticket96-57d6493-31July2020.pdf<https://github.com/mpi-forum/mpi-standard/files/5008882/mpi40-report-ticket…> We would also like to announce a "no-no-vote" for the changes since the reading. These changes include updates due to the addition of the Partitioned Point-to-Point Communications chapter to the standard and text updates to the MPI_REQUEST_FREE section. These changes can be viewed here<https://github.com/mpi-forum/mpi-standard/pull/116/files/df4d4ed0b59c9f6b38…>. Thanks, Puri (on behalf of the Semantic Terms WG)

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Virtual meeting recordings dates mixed up
by Ali Omar Abdelazim Mohammed 03 Aug '20

03 Aug '20

Hi all, I noticed that the dates of the virtual meetings recordings are mixed up (https://www.mpi-forum.org/virtual_meetings/) For example: 1. There was no virtual meeting on 22 July, as the meeting was canceled. The recording dated 22 July is for the meeting on 15 July if I am not mistaken. 2. The entries for the previous exceptional virtual meeting Day 1-3 are on 29 June, 30 June, and 15 July …The third day of the meeting was on 01 July. I think we need to modify as follows: 15 July, 10:00 - 12:00 - Exceptional Virtual Meeting (Day 3) —> 1 July, 10:00 - 12:00 - Exceptional Virtual Meeting (Day 3) 22 July, 10:00 - 12:00 - MPI_T / RMA —> 15 July, 10:00 - 12:00 - MPI_T / RMA Best regards, Ali On 2 Aug 2020, at 19:00, mpi-forum-request(a)lists.mpi-forum.org<mailto:[email protected]> wrote: Send mpi-forum mailing list submissions to mpi-forum(a)lists.mpi-forum.org<mailto:[email protected]> To subscribe or unsubscribe via the World Wide Web, visit https://lists.mpi-forum.org/mailman/listinfo/mpi-forum or, via email, send a message with subject or body 'help' to mpi-forum-request(a)lists.mpi-forum.org You can reach the person managing the list at mpi-forum-owner(a)lists.mpi-forum.org When replying, please edit your Subject line so it is more specific than "Re: Contents of mpi-forum digest..." Today's Topics: 1. Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday (Martin Schulz) 2. Re: Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday (Martin Schulz) ---------------------------------------------------------------------- Message: 1 Date: Sun, 2 Aug 2020 16:14:41 +0200 From: Martin Schulz <schulzm(a)in.tum.de> To: "Jeff Squyres (jsquyres) via mpi-forum" <mpi-forum(a)lists.mpi-forum.org> Subject: [Mpi-forum] Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday Message-ID: <59BB2A3F-AEAF-48DD-B92B-850C81B589CF(a)in.tum.de> Content-Type: text/plain; charset=utf-8 Hi all, Just as the usual reminder - tomorrow is the 2 week mark for our extra August meeting - please send any announcements for ballots, readings, etc. to the list by tomorrow / Monday. Thanks! Martin ? Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems Department of Informatics, TU-Munich, Boltzmannstra?e 3, D-85748 Garching Member of the Board of Directors at the Leibniz Supercomputing Centre (LRZ) Email: schulzm(a)in.tum.de ------------------------------ Message: 2 Date: Sun, 2 Aug 2020 16:17:15 +0200 From: Martin Schulz <schulzm(a)in.tum.de> To: Main MPI Forum mailing list <mpi-forum(a)lists.mpi-forum.org> Subject: Re: [Mpi-forum] Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday Message-ID: <2B2F7E1F-E600-460C-B6AE-D6949A374F40(a)in.tum.de> Content-Type: text/plain; charset="utf-8" Hi all, I will be reading the errata issue #169 (together with the matching ballot). Topic: MPI_File_read equivalency https://github.com/mpi-forum/mpi-issues/issues/169 <https://github.com/mpi-forum/mpi-issues/issues/169> Thanks, Martin ? Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems Department of Informatics, TU-Munich, Boltzmannstra?e 3, D-85748 Garching Member of the Board of Directors at the Leibniz Supercomputing Centre (LRZ) Email: schulzm(a)in.tum.de On 2. Aug 2020, at 16:14, Martin Schulz via mpi-forum <mpi-forum(a)lists.mpi-forum.org> wrote: Hi all, Just as the usual reminder - tomorrow is the 2 week mark for our extra August meeting - please send any announcements for ballots, readings, etc. to the list by tomorrow / Monday. Thanks! Martin ? Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems Department of Informatics, TU-Munich, Boltzmannstra?e 3, D-85748 Garching Member of the Board of Directors at the Leibniz Supercomputing Centre (LRZ) Email: schulzm(a)in.tum.de _______________________________________________ mpi-forum mailing list mpi-forum(a)lists.mpi-forum.org https://lists.mpi-forum.org/mailman/listinfo/mpi-forum -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mpi-forum.org/pipermail/mpi-forum/attachments/20200802/4bd9397…> ------------------------------ Subject: Digest Footer _______________________________________________ mpi-forum mailing list mpi-forum(a)lists.mpi-forum.org https://lists.mpi-forum.org/mailman/listinfo/mpi-forum ------------------------------ End of mpi-forum Digest, Vol 43, Issue 1 ****************************************

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Re: [Mpi-forum] Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday
by Guillaume Mercier 02 Aug '20

02 Aug '20

Hi all, I'd like to read an errata dealing with MPI_Comm_split_type Issue is here: https://github.com/mpi-forum/mpi-issues/issues/301 PR is here: https://github.com/mpi-forum/mpi-standard/pull/263 Thanks, Guillaume On 8/2/20 4:14 PM, Martin Schulz via mpi-forum wrote: > Hi all, > > Just as the usual reminder - tomorrow is the 2 week mark for our extra August meeting - please send any announcements for ballots, readings, etc. to the list by tomorrow / Monday. > > Thanks! > > 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 > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpi-forum >

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Re: [Mpi-forum] Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday
by Martin Schulz 02 Aug '20

02 Aug '20

Hi all, I will be reading the errata issue #169 (together with the matching ballot). Topic: MPI_File_read equivalency https://github.com/mpi-forum/mpi-issues/issues/169 <https://github.com/mpi-forum/mpi-issues/issues/169> Thanks, 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 > On 2. Aug 2020, at 16:14, Martin Schulz via mpi-forum <mpi-forum(a)lists.mpi-forum.org> wrote: > > Hi all, > > Just as the usual reminder - tomorrow is the 2 week mark for our extra August meeting - please send any announcements for ballots, readings, etc. to the list by tomorrow / Monday. > > Thanks! > > 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 > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpi-forum

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Final Reminder: Deadline for Ballots, Readings, ... for the August MPI Forum Meeting is Tomorrow/Monday
by Martin Schulz 02 Aug '20

02 Aug '20

Hi all, Just as the usual reminder - tomorrow is the 2 week mark for our extra August meeting - please send any announcements for ballots, readings, etc. to the list by tomorrow / Monday. Thanks! 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

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