From Julien.JAEGER at CEA.FR  Wed Mar 25 08:38:25 2026
From: Julien.JAEGER at CEA.FR (Julien.JAEGER at CEA.FR)
Date: Wed, 25 Mar 2026 13:38:25 +0000
Subject: [mpiwg-persistence] New meeting of MPI Forum Collective WG
In-Reply-To: <CH0PR07MB8299FC50EBA42937CA5526FFCE63A@CH0PR07MB8299.namprd07.prod.outlook.com>
References: <CH0PR07MB82996516EB5AE8C2B6AF71B7CE66A@CH0PR07MB8299.namprd07.prod.outlook.com>,
	<CH0PR07MB8299FC50EBA42937CA5526FFCE63A@CH0PR07MB8299.namprd07.prod.outlook.com>
Message-ID: <82dcc24f948446c0a9bd8b4e8952a5da@CEA.FR>

Dear all,


As Tony and I are not available, today's meeting is canceled.

We will meet in two weeks.


If you have a specific subject you want to bring up, discuss or present in a coming meeting, do not hesitate to send a email to Tony and I so we can update the running agenda accordingly.


Best regards,

Julien Jaeger.

________________________________
De : mpiwg-persistence <mpiwg-persistence-bounces at lists.mpi-forum.org> de la part de Skjellum, Anthony via mpiwg-persistence <mpiwg-persistence at lists.mpi-forum.org>
Envoy? : mercredi 11 f?vrier 2026 15:47:20
? : mpiwg-coll at lists.mpi-forum.org; mpiwg-persistence at lists.mpi-forum.org
Objet : Re: [mpiwg-persistence] New meeting of MPI Forum Collective WG

Agenda for today (this will be on-going, and we will add to/resolve over time) AGENDA - FEB 11, 2026 Reconstitution - subsume partitioned, persistent, point-to-point and collective discussions Items for good of the order form participants not
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Agenda for today (this will be on-going, and we will add to/resolve over time)


AGENDA - FEB 11, 2026


  1.
Reconstitution  - subsume partitioned, persistent, point-to-point and collective discussions
  2.
Items for good of the order form participants not covered below
  3.
Align with hybrid/streams work in pt2pt scope

BIG PICTURE AGENDA FOR GROUP, NOT EVERYTHING FOR FIRST MEETING.


  1.
Discuss partitioned collective status and plans
     *
Prior papers
     *
Issues with synchronizing collectives
     *
Prototypes
     *
New ideas with buffer management
     *
Path to standardization

  2.
Corollary issues with persistent collectives
     *
Non-blocking init/free - not allowed

  3.
Related issue - handoff of control of user state
     *
Handling the registration and registration of index vectors and data pointers
     *
C++ way
     *
C (and Fortran) way with registration callbacks at free
     *
Removing ambiguity in the ?zero time use case? and whenever a free is allowed to lazy in MPI that holds user state (so it can be released before MPI_Finalize).


  1.
Managing unexpected state in partitioned (and maybe persistent) operations
     *
Elimination of PBUF_PREPARE in all partitioned considerations
     *
Considering to ?generalize? point-to-point partitioned to enable a) persistence better; b) buffer pools


  1.
Streaming collectives

  2.
Other things we ?owe? short term
     *
MPI_Parrived_any ticket ? very useful with current partitioned point-to-point

  3.
Document enhancements
     *
Revamping the collective chapter front-to-back (ask Puri if he had some input on prior tries at this?)
     *
Making uniform the presentation of blocking, nonblocking, persistent, and future (partitioned) collective
     *
Front matter needs a look for terms, definitions?

---
Running minutes will be captured and shared.  Recording whenever possible :-)

Anthony Skjellum, PhD
Professor of Computer Science
Director, Advanced Scalable Computing,
              Extreme Networks & Data (ASCEND) Center
Tennessee Technological University
email: askjellum at tntech.edu
cell: +1-205-807-4968



________________________________
From: Skjellum, Anthony
Sent: Friday, February 6, 2026 10:26 AM
To: mpiwg-coll at lists.mpi-forum.org <mpiwg-coll at lists.mpi-forum.org>; mpiwg-persistence at lists.mpi-forum.org <mpiwg-persistence at lists.mpi-forum.org>
Cc: Raffenetti, Ken <raffenet at anl.gov>; Julien.JAEGER at CEA.FR <Julien.JAEGER at CEA.FR>
Subject: New meeting of MPI Forum Collective WG
When: Wednesday, February 11, 2026 9:00 AM-10:00 AM.
Where: Via Zoom

All: Julien Jaeger and I are resuming.  Agenda forthcoming.  Will be every other week, to dovetail with RMA WG.

Tony Skjellum (TNTECH) is inviting you to a scheduled Zoom meeting.

Topic: MPI WG Collective (Persistent too)
Time: This is a recurring meeting Meet anytime
Join Zoom Meeting
https://urldefense.us/v3/__https://tntech.zoom.us/j/85895299644?pwd=UVeoehU41wU6tbRKKQIs4ZHpIGphGz.1__;!!G_uCfscf7eWS!bTqIrajqFRrlPlu5HuPse40dtvkZ_mWKFohX0HfmsPHwcwnuO4invxLPzNB_so13mUweZoFawIQCGXoNDnWTzN6hAle97ZzRo9OKTac$ <https://urldefense.us/v3/__https://tntech.zoom.us/j/85895299644?pwd=UVeoehU41wU6tbRKKQIs4ZHpIGphGz.1__;!!G_uCfscf7eWS!bDLoIecXOcMmInCA9UsARCSmTbTFhex7w4NwzO-rDsAnmtvC35l8aL-uNNXOMmwzJEcQ8Sh36tZBJ6H_VqU4EaIfx7e16Dk3EyMJ4Q$>

Meeting ID: 858 9529 9644
Passcode: mpi4eva

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