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WeeklyTelcon_20161004

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Geoffrey Paulsen edited this page Jul 25, 2023 · 2 revisions

Open MPI Weekly Telcon

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

Attendees

  • Geoff Paulsen
  • Jeff Squyres
  • Brad Benton
  • David Solt
  • Edgar Gabriel
  • Howard Pritchard
  • Josh Hursey
  • Joshua Ladd
  • Nathan Hjelm
  • Ryan Grant
  • Sylvain Jeaugey
  • Todd Kordenbrock

Agenda

Review 1.10

  • Milestones
  • 1.10.4
    • Still Nothing new. No one raised any issues at this time.

Review 2.0.x

  • Wiki

  • Milestones

    • 2.1.0
      • Sept 30th deadline for New Features. Jeff sent email last Wed or Thursday.
      • Mpool Rcache re-write PR2101. Nathan reverted all of the spot fixes, and then applied all of them.
        • Nathan has 2 more PRs for trivial features he'd like to add.
          • Add flag enumerator to mca base - one of the cherry-picks will be much harder if it goes in before.
          • Been on master for many months, but many many cherry-picks, so PLEASE review.
        • Affects every BTL, been couple of different
        • Goals: clear interface between mpool and rcache. supports memkind.
        • orthogonal to memhooks, because only affects internal allocations.
        • confusing, because it used to be very confusing, but NOW is separating this out. All explicit, allocations, and then separate registrations.
      • C++ wrappers for OSHMEM - Failed Jenkins but passes by hand. Resolve before merging.
      • PMIx 2.0
        • Progress with Artem and Josh - Changed directions to use 1.1.2 + dstore shared memory.
        • probably not end of the week.
      • Vader out of order issue (single threaded case):
        • Relying on OB1. When you setup fastbox, everything must go through fastbox. When fastbox is full, everything goes on a queue to be processed later.
        • Fix could be to only preserve a fastbox if nothing on pending list... but that causes performance implications.
        • Easy enough to fix, can make 2.1.0
        • No expected effect on vader multi-threaded.
      • Vader multithreaded - All we care about is threading in the context of a thread. Not for 2.1.0. This will require a redesign.
        • May be research.
        • Ordering with multiple threads means something different than in single thread.
        • Sequence numbers (Per MPI_Send()) are problematic in multi-threaded modes.
        • If you have multiple routes, you need sequencing.
        • What to do in multiple thread case... needs to be pushed to a redesign.
      • In Master can use PMIx 2.0 with external. In Master, internal component has already upgraded to 3.0.
      • IBM and Mellanox, along with Nathan and Howard (LANL) will meet to discuss getting this work done quickly for OMPI 2.1.0.

  • GITHUB Tags / Milestones - not well documented in wiki.

    • push-back tag - means it's gone back to the author.
    • Other tags have changed meanings over time.

  • Discussion on Giles OSHMEM - onexit PR2121

    • Seems okay, not sure what the purpose of it.
    • Need to ask Giles why he wants this.
    • Giles said on PR2120 that it was addressing a corner-case (--enable-static or --disable-visibility).

  • SPI - http://www.spi-inc.org/

    • getting people to approve of these.
    • We'll be on Oct 12th Agenda. Once they formally invite us, then we have 60 days to agree / decline.
    • Works solely on a volunteer basis, so very inexpensive.
    • End of September for soliciting feedback on using SPI.
    • Open MPI will hold a formal vote after we receive the formal invite (in mid-to-late-December?)
    • Tennessee owns the logos, but they will recreate with meta-data giving them to open source.

  • New Contribution agreement / Consent agreement / Bylaws.

    • Will need a formal vote by members.
    • End of October for discussion of new contributor agreement / bylaws.
    • After that we'll set a date for voting.

New Agenda Items:

Review Master MTT testing (https://mtt.open-mpi.org/)

MTT Dev status:

Website migration

Open MPI Developer's Meeting

  • Date of another face to face. January or February? Think about, and discuss next week.
  • Geoff will put up a doodle to solicit input.

Status Update Rotation

  1. LANL, Houston, IBM
  2. Cisco, ORNL, UTK, NVIDIA
  3. Mellanox, Sandia, Intel

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