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I am starting a new thread with the appropriate subject header to separate out the discussion on this topic. I have also cc'ed the collective communications group and removed the semantic terms group for this discussion.

Thanks,

Puri

From: Skjellum, Anthony <Tony-Skjellum@utc.edu>
Sent: Wednesday, July 15, 2020 12:53 PM
To: Bangalore, Purushotham <puri@uab.edu>; HOLMES Daniel <d.holmes@epcc.ed.ac.uk>
Cc: mpiwg-semantic-terms@lists.mpi-forum.org <mpiwg-semantic-terms@lists.mpi-forum.org>; mpiwg-persistence@lists.mpi-forum.org <mpiwg-persistence@lists.mpi-forum.org>
Subject: Re: [mpiwg-persistence] Summary of Semantics for Partitioned Communication Operations

We had a short meeting with Ryan and students---he advocates

for a blocking PSYNC on both sides now... after start... before kernel

launch on send side...

Anthony Skjellum, PhD

Professor of Computer Science and Chair of Excellence

Director, SimCenter

University of Tennessee at Chattanooga (UTC)

tony-skjellum@utc.edu [or skjellum@gmail.com]

cell: 205-807-4968

From: mpiwg-persistence <mpiwg-persistence-bounces@lists.mpi-forum.org> on behalf of HOLMES Daniel via mpiwg-persistence <mpiwg-persistence@lists.mpi-forum.org>
Sent: Wednesday, July 15, 2020 1:42 PM
To: Purushotham Bangalore <puri@uab.edu>
Cc: mpiwg-semantic-terms@lists.mpi-forum.org <mpiwg-semantic-terms@lists.mpi-forum.org>; mpiwg-persistence@lists.mpi-forum.org <mpiwg-persistence@lists.mpi-forum.org>
Subject: Re: [mpiwg-persistence] Summary of Semantics for Partitioned Communication Operations

Hi Puri,

Thanks for this - a great way to provoke some progress (no pun intended).

I would suggest: move the rows dealing with MPI_PREADY and MPI_PARRIVED between MPI_START and MPI_WAIT, i.e. in the approximate calling order.

Also, I would add “ic” for the new MPI_PREADY, MPI_PARRIVED, etc procedures - because the operation is definitely incomplete at the point in time they are called, during the time interval of their entire execution, and at the point in time they return - there is no possibility they could be completing or freeing procedures.

What are the other footnotes: 7, 9, and 14? (I could look them up but I’d have to choose the same draft version as you because the numbering changed recently.)

Cheers,

Dan.

—
Dr Daniel Holmes PhD
Architect (HPC Research)
d.holmes@epcc.ed.ac.uk
Phone: +44 (0) 131 651 3465
Mobile: +44 (0) 7940 524 088
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On 15 Jul 2020, at 18:24, Bangalore, Purushotham via mpiwg-persistence <mpiwg-persistence@lists.mpi-forum.org> wrote:

<MPI-semantics-appendix.xlsx>

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