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Re: [mpiwg-rma] Feb 20 RMA meeting: device-triggered communication
by Joseph Schuchart 19 Feb '25

19 Feb '25

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Feb 20 RMA meeting: device-triggered communication
by Joseph Schuchart 13 Feb '25

13 Feb '25

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Re: [mpiwg-rma] RMA Chapter Committees
by Jim Dinan 16 Jan '25

16 Jan '25

I'd like to help out, too. On Fri, Jan 10, 2025 at 8:57 AM Christoph Niethammer via mpiwg-rma < mpiwg-rma(a)lists.mpi-forum.org> wrote: > Hi Joseph, I am interested in being part of the RMA CC and looking forward > to help with the review of the chapter! Best Christoph ----- Original > Message ----- From: "Joseph Schuchart via mpiwg-rma" <mpiwg-rma@ lists. > mpi-forum. org> To: "mpiwg-rma" > ZjQcmQRYFpfptBannerStart > This Message Is From an External Sender > This message came from outside your organization. > > ZjQcmQRYFpfptBannerEnd > > Hi Joseph, > > I am interested in being part of the RMA CC and looking forward to help with the review of the chapter! > > Best > Christoph > > ----- Original Message ----- > From: "Joseph Schuchart via mpiwg-rma" <mpiwg-rma(a)lists.mpi-forum.org> > To: "mpiwg-rma" <mpiwg-rma(a)lists.mpi-forum.org> > Cc: "Joseph Schuchart" <schuchart(a)icl.utk.edu> > Sent: Wednesday, 8 January, 2025 22:07:25 > Subject: [mpiwg-rma] RMA Chapter Committees > > All, It's that time of the cycle again: we need volunteers for the RMA chapter committee. The main task of the CC is to ensure correctness through proof-reads and PRs. There weren't many changes to the RMA chapter this time around so this shouldn't > ZjQcmQRYFpfptBannerStart > This Message Is From an External Sender > This message came from outside your organization. > ZjQcmQRYFpfptBannerEnd > All, > > It's that time of the cycle again: we need volunteers for the RMA > chapter committee. The main task of the CC is to ensure correctness > through proof-reads and PRs. There weren't many changes to the RMA > chapter this time around so this shouldn't be a big deal. If you have > some time to spare between now and Jan 27, please let me know if you > want to join the CC and we will distribute the work accordingly. The > chapter has 80 pages so if we can distribute across 3 or 4 shoulder the > review should be relatively quick. > > The current RMA CC (from the MPI Forum website) is Bill Gropp, Pavan > Balaji, Joseph Schuchart, Nathan Hjelm, and Artem Polyakov so it's > probably time to review that anyway. > > Thanks > Joseph > > _______________________________________________ > mpiwg-rma mailing [email protected]://urldefense.us/v3/__https://lists.mpi-forum.org/mailman/listinfo/mpiwg-rma__;!!G_uCfscf7eWS!ZqS5gOO9vyrja5MYan3sXiqZ1umk59akE5z1dySTQp2TGWPINTvxhZzWjisgDFeMa3lYr7ugV469hR-ZHEfxnX9kYFmMPw$ > > _______________________________________________ > mpiwg-rma mailing list > mpiwg-rma(a)lists.mpi-forum.org > https://urldefense.us/v3/__https://lists.mpi-forum.org/mailman/listinfo/mpi… >

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Re: [mpiwg-rma] RMA Chapter Committees
by Christoph Niethammer 10 Jan '25

10 Jan '25

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Re: [mpiwg-rma] RMA Chapter Committees
by Gropp, William D 09 Jan '25

09 Jan '25

I’m confirming that I am still interested in participating in this CC. Bill William Gropp Director, NCSA Grainger Distinguished Chair in Engineering Siebel School of Computing and Data Science University of Illinois Urbana-Champaign https://urldefense.us/v3/__https://wgropp.cs.illinois.edu__;!!G_uCfscf7eWS!… <https://urldefense.us/v3/__https://wgropp.cs.illinois.edu/__;!!G_uCfscf7eWS… > From: mpiwg-rma <mpiwg-rma-bounces(a)lists.mpi-forum.org> on behalf of Joseph Schuchart via mpiwg-rma <mpiwg-rma(a)lists.mpi-forum.org> Date: Wednesday, January 8, 2025 at 3:07 PM To: mpiwg-rma <mpiwg-rma(a)lists.mpi-forum.org> Cc: Joseph Schuchart <schuchart(a)icl.utk.edu> Subject: [mpiwg-rma] RMA Chapter Committees All, It's that time of the cycle again: we need volunteers for the RMA chapter committee. The main task of the CC is to ensure correctness through proof-reads and PRs. There weren't many changes to the RMA chapter this time around so this shouldn't ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization. ZjQcmQRYFpfptBannerEnd All, It's that time of the cycle again: we need volunteers for the RMA chapter committee. The main task of the CC is to ensure correctness through proof-reads and PRs. There weren't many changes to the RMA chapter this time around so this shouldn't be a big deal. If you have some time to spare between now and Jan 27, please let me know if you want to join the CC and we will distribute the work accordingly. The chapter has 80 pages so if we can distribute across 3 or 4 shoulder the review should be relatively quick. The current RMA CC (from the MPI Forum website) is Bill Gropp, Pavan Balaji, Joseph Schuchart, Nathan Hjelm, and Artem Polyakov so it's probably time to review that anyway. Thanks Joseph

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March Voting Announcement
by Joseph Schuchart 08 Jan '25

08 Jan '25

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RMA Chapter Committees
by Joseph Schuchart 08 Jan '25

08 Jan '25

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Re: [mpiwg-rma] Meeting Oct 10: Notified communication discussion
by Holmes, Daniel John 10 Oct '24

10 Oct '24

Hi all, My notes from the meeting today (more detail and/or explanation available on request, or watch the recording): Notified-RMA feedback 2024_10_10 Jeff: notification for fetch_and_op and compare_and_op? Overlapping windows. Fine-grained completion of fetch-and-op without requirement to progress other things Target or origin side? Origin s/be request-based? Joseph: is the extra flexibility of changing the number of notifications valuable enough? Does it compromise the performance of the implementation? Add MPI_Win_allocate_with_notifications initially; add others later, if needed and proven to work? Dmitry - allocation and window creation might be in different levels of the application; needs separate APIs Jeff: MPI_Win_allocate_shared should only be allowed for getting shared memory, not for RMA operations! This API exists as a wrapper over POSIX shmem; app should do language atomics, not RMA Dmitry: making the user implement notifications in shared memory is a bad idea Efficiency is secondary to portability, correctness, etc. Jeff: Fortran has no memory model, MPI can help by defining notification memory semantics Personal feeling - Forum will demand all four for orthogonality Maybe an advice - one of these is better than the others Joseph: implement "during constructor" and see if it is faster, then decide Burden of proof - need to prove a negative; hmm Jeff: no law preventing pre-allocation of N counters during constructor If user asks for less, great! Otherwise, allocate more. Alexander: INFO key for constructor to specify expected max number of counters Also, window memory on device and notifications on host Joseph: agree that notifications should be at message boundaries Maybe we can have both kinds [ED: yes, that's orthogonal] Jeff: can you use IB "send immediate" for put-notify? Needs recent implementor experience -- maybe there's a size limit? Ken - size is not consistent across providers, also not exposed in some low-level APIs Jeff - if network is in-order then two writes is ordered for free Ken - if out-of-order network, we'll look at it Jeff: add request-based notified-RMA, restrict from device-initiated when that happens Alexander - we proposed what we implemented, other things are possible Jeff - implementation of request-based not necessary for evaluation of this proposal Best wishes, Dan. From: mpiwg-rma <mpiwg-rma-bounces(a)lists.mpi-forum.org> On Behalf Of Joseph Schuchart via mpiwg-rma Sent: Tuesday, October 8, 2024 9:34 PM To: mpiwg-rma <mpiwg-rma(a)lists.mpi-forum.org> Cc: Joseph Schuchart <schuchart(a)icl.utk.edu> Subject: [mpiwg-rma] Meeting Oct 10: Notified communication discussion Dear all, The RMA WG will meet again this Thursday (October 10) at 10am US Central / 11am US Eastern / 5pm Central European time to discuss the notified communication proposal put forward by Intel [1]. Dan will lead the discussion. The connection ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization. ZjQcmQRYFpfptBannerEnd Dear all, The RMA WG will meet again this Thursday (October 10) at 10am US Central / 11am US Eastern / 5pm Central European time to discuss the notified communication proposal put forward by Intel [1]. Dan will lead the discussion. The connection information can be found at https://urldefense.us/v3/__https://github.com/mpiwg-rma/mpi-standard/wiki__…<https://urldefense.us/v3/__https:/github.com/mpiwg-rma/mpi-standard/wiki__;…>. We started using a new zoom room last time so please make sure you use the link on the github wiki. Cheers Joseph [1] https://urldefense.us/v3/__https://github.com/mpiwg-rma/mpi-standard/pull/1…<https://urldefense.us/v3/__https:/github.com/mpiwg-rma/mpi-standard/pull/11…>

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Meeting Oct 10: Notified communication discussion
by Joseph Schuchart 08 Oct '24

08 Oct '24

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Re: [mpiwg-rma] RMA WG meeting on September 12
by Joseph Schuchart 12 Sep '24

12 Sep '24

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