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WeeklyTelcon_20161018

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Jeff Squyres edited this page Nov 18, 2016 · 1 revision

Open MPI Weekly Telcon

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

Attendees

  • Geoff Paulsen
  • Jeff Squyres
  • Brad Benton
  • Brian
  • Edgar Gabriel
  • Geoffroy Vallee
  • Howard Pritchard
  • Josh Hursey
  • Joshua Ladd
  • Ralph
  • Ryan Grant
  • Todd Kordenbrock

Agenda

Review 1.10

  • Milestones
  • 1.10.x
    • Still no drivers for a 1.10.5.

Review 2.0.x

  • Wiki
    • 2.0.2 - Schedule, no drivers right now.
      • Probably want to do it. 2.0.1 does have some problems. Nvidia couldn't even build.
  • Milestones
    • 2.1.0
      • PMIx 1.2.0 stuff. Artem has been working away. Thinks we have final set of commits needed, and stacked up.
        • Backward compatibility Fix (not Rosetta Feature).
        • Error handling, Return code cleanup, job info.
        • Since this is slipping out of October, would it be less risky for a NEWER version of PMIx?
          • Open MPI 2.1.0, do we want to Skip PMIx 1.2.0, and go straight to PMIx 2.0.0?
          • Open MPI want's dstore functionality, and potentially some of the APIs IBM was asking for.
          • Depends on timing.
          • Ralph still working on cross compatibility code (ready well before January).
          • If trying to get Open MPI 2.1.0 in December, then intermediate PMIX 1.2.0 or PMIX 2.0.0 may be better.
          • What is limiting factor of going to HEAD?
          • Without Rosetta Stone, not getting additional functionality of going to PMIx HEAD.
          • PMIX 2.0 or HEAD (3.0) Open MPI would have to change OPAL framework level, and ORTE integration.
            • Backend of existing APIs are stable, but new APIs to support those.
          • If going to use PMIx 1.2, then these two don't have to change.
          • Do we expect major perturbation after PMIx 3.0? (Only new APIs, no changes to APIs expected).
            • in PMIx 1.2 there were 2 APIs that CHANGEd (not just added).
        • Cherry-picking our way to PMI-x HEAD would be a HUGE amount of work, but drop-in, might not be as much work.
        • It's really in IBM's camp. Ralph is working in PMIx camp, ready by thanksgiving.
        • Josh is taking leadership for PMIx 1.2 and 2.0 streams. How much work is it to make this ready, along with Mellanox.
          • Josh Hursey will talk internally and then with Mellanox, and then Ralph.

PR 2181 - Lazy wait in 2.x - busy waiting experimenting with giving more timeslice to app / transport, rather than busy waiting.

schedule. - Discussed PR2176 - Add an experimental ability to skip the RTE barriers. - Mellanox says UCX supports this, so it would be nice on UCX.
- Need to tell people this won't work if not using UCX (or network that doesn't need it) - Would like information how UCX supports communication to a non-existant remote process.

  • 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.

  • SPI - http://www.spi-inc.org/

    • Open MPI vote to be in SPI may be delayed a month.
      • SPI's Official notice to mailling list had some issues. Some non-board members only finding out yesterday.
      • General population needs to know, in case they know about possible pending lawsuits against new members.

  • Discussion about Nightly snapshot versioning.

    • Complicated tarball naming is confusing.
    • Jeff proposed a nomenclature.
    • Giles had a proposal about git describe, but concern that might add more confusion.
    • people generally okay with Jeff's proposal, but need to ensure MTT does the right thing.

  • MTT - only Cisco and ____ testing v2.0.x. Others are testing v2.x (reported as v2.0.1-...)

    • Others please test both v2.0.x and v2.x

  • MTT downtime 3 hours - no downtime today, try for Friday

    • Might need to force a DNS update afterwards
    • Josh H will send out reminder email before and after it's moved.

  • OMPI BOFF is moved to Wed Night at super-computing.

  • New Contribution agreement / Consent agreement / Bylaws.

    • Patent clause protection change proposal. - Could put this language in the disclaimer signoff.
      • either don't care or want to change this.
    • Official notice: Members will hold a formal vote in 2 weeks (Oct 25) to vote on new bylaws.
    • Comment that driver for this is no longer there, since they've become a member.
    • Comment that this new bylaw is driving towards way other open source projects are managing this.
    • Comment that 2 week notice for official votes is highly preferable.
    • Geoff Paulsen will send out notice, and ask for comments to devel mailing list.
    • Geoff Paulsen will send out voting notice to devel-core for Oct 25th vote.

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

MTT Dev status:

Website migration

Open MPI Developer's Meeting

  • 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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