WeeklyTelcon_20220125

Open MPI Weekly Telecon ---

• Dialup Info: (Do not post to public mailing list or public wiki)

Attendees (on Web-ex)

• Austen Lauria (IBM)
• Brendan Cunningham (Cornelis Networks)
• Brian Barrett (AWS)
• Christoph Niethammer (HLRS)
• David Bernhold (ORNL)
• Geoffrey Paulsen (IBM)
• Hessam Mirsadeghi (UCX/nVidia)
• Howard Pritchard (LANL)
• Jeff Squyres (Cisco)
• Josh Hursey (IBM)
• Thomas Naughton (ORNL)
• Todd Kordenbrock (Sandia)
• Tomislav Janjusic (nVidia)
• William Zhang (AWS)

not there today (I keep this for easy cut-n-paste for future notes)

• Akshay Venkatesh (NVIDIA)
• Artem Polyakov (nVidia)
• Aurelien Bouteiller (UTK)
• Brandon Yates (Intel)
• Charles Shereda (LLNL)
• Edgar Gabriel (UoH)
• Erik Zeiske
• Geoffroy Vallee (ARM)
• George Bosilca (UTK)
• Harumi Kuno (HPE)
• Joseph Schuchart
• Joshua Ladd (nVidia)
• Marisa Roman (Cornelius)
• Mark Allen (IBM)
• Matias Cabral (Intel)
• Matthew Dosanjh (Sandia)
• Michael Heinz (Cornelis Networks)
• Nathan Hjelm (Google)
• Noah Evans (Sandia)
• Raghu Raja (AWS)
• Ralph Castain (Intel)
• Sam Gutierrez (LLNL)
• Scott Breyer (Sandia?)
• Shintaro iwasaki
• Xin Zhao (nVidia)

---

NEW Discussion

• MPI_Reduce_local - Which PR do we want?
  • https://github.com/open-mpi/ompi/pull/9717 vs https://github.com/open-mpi/ompi/pull/9719 also 9867.
    • lets just remove the 3 arg op code (think there's a bug) for v5.0
    • Geoff will Close 9717 and 9867, and merge 9719 (george's removal).
  • Geoff didn't do this, will do this today.
• Do we still support cross-compilation?
  • implications in https://github.com/open-mpi/ompi/pull/9023
  • We should not do anything to preclude this, but it's probably currently broken.
  • This PR may be closed?
• Update just few lines of ROMIO without full update for release branch?
  • Regarding https://github.com/open-mpi/ompi/pull/9855
  • Note: ROMIO v3.2.1 was the latest of the v3.2.x series, so future ROMIO updates would include this fix.
  • Because this fix is a 1-liner, and it comes from the very next ROMIO version, update the commit with the ROMIO hash, and it's low enough risk for release branches.

---

4.0.x

• Schedule: No schedule for v4.0.8 yet
  • bugfixes case-by-case basis
• Winding down v4.0.x, and after v5.0.x will stop
• Really only want small changes reported by users.
• Otherwise, point users to v4.1.x release.
• Howard and Geoff will meet Jan 28th

v4.1.x

• Schedule: Shooting for v4.1.3 end of March/Q1.
• No other update.

v5.0.x

• Need a full ROMIO update [Geoff to file issue}
  • Open an issue to track this.
• Prrte has for a long time has had a schizo component, that tries to provide an interface based on what implementation the user's using. CLI was still centralized, and this was leading to difficulties. Example: disagreement about how ranks should be placed with -N option. So moved some of these decisions down into a framework that has an OMPI component.
  • Some questions if we should bring this into v5.0 for OMPI. There is a PRRTE PR up with some early work.
  • This would be backported to the PRRTE release branch for our OMPI v5
  • Blocker v5.0 items are in the Project/2
  • Schedule is Q1
• What's the status of MPI Sessions?
  • Howard sent out email to devel-core.
  • Nathan suggests we merge
• Thinking about an RC before and after Sessions.
  • Well as far as tracking, we have nightly tarballs, and it'll be clear in git
• Docs rework
  • We made a lot of progress on revamping the docs with restructured text.
  • Might actually be able to get this done by v5.0.x
  • Dont go review yet, but lots of good progress.

Master

• No new Gnus

MTT

• A fix pending to workaround the IBM XL MTT build failure (compiler abort)
• Issue 9919 - Thinks this common component should still be built.
  • Commons get built when it's likely their is a dependency.
  • Commons self-select if they should be built or not.