WeeklyTelcon_20200407

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

• Geoffrey Paulsen (IBM)
• Jeff Squyres (Cisco)
• Austen Lauria (IBM)
• Akshay Venkatesh (NVIDIA)
• Artem Polyakov (Mellanox)
• Brian Barrett (AWS)
• Brendan Cunningham (Intel)
• David Bernhold (ORNL)
• Edgar Gabriel (UH)
• Geoffroy Vallee (ARM)
• George Bosilca (UTK)
• Harumi Kuno (HPE)
• Howard Pritchard (LANL)
• Joseph Schuchart
• Josh Hursey (IBM)
• Joshua Ladd (Mellanox)
• Matthew Dosanjh (Sandia)
• Thomas Naughton (ORNL)
• Ralph Castain (Intel)
• Scott Breyer (Sandia?)
• Todd Kordenbrock (Sandia)
• William Zhang (AWS)

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

• Noah Evans (Sandia)
• Michael Heinz (Intel)
• Erik Zeiske
• Shintaro iwasaki
• Nathan Hjelm (Google)
• Charles Shereda (LLNL)
• Brandon Yates (Intel)
• Mark Allen (IBM)
• Matias Cabral (Intel)
• Xin Zhao (Mellanox)
• mohan (AWS)

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New

• Next week 4/7 - Discuss ompirun front end with python integration for -net

Old

• MTT -
  • If you change your MTT to startup PRRTE at begining of session, and just use prun.
  • Can see times cut in half or more.
  • This is good, but also need to test mpirun wrapper.
  • Cisco is converting half of MPI installs to use prrte/prun

OMPI submodules

• OMPI master submodule pointers setup to track PMIx and PRRTE master.

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Release Branches

Blockers All Open Blockers

Review v4.0.x Milestones v4.0.4

• v4.0.4 in the works.
• Do we want to integrate with latest PMIx v3.1 branch (commits after v3.1.5)?
• Comm Spawn failure on v4.0.3, possibly related to PMIx v3.1.4 commit.
  • Ralph is looking at.
  • If this is in PMIX, then this might drive a new v3.1 release.

v5.0.0

• Schedule:

  • Feature Freeze: April 30
  • Release: End of June

• Discussing Features on google sheets document

  • (https://docs.google.com/spreadsheets/d/1OXxoxT9P_YLtepHg6vsW3-vp4pdzGQgyknNbkzenYvw/edit#gid=0) which were taken from the face to face wiki.

• PMIx v4.0.0 - on track

  • Schedule:
  • PMIX - Won't release v4.0 in time for OMPI v5.0, but will drop a tag that Open-MPI can use.

• PRRTE v2.0 - on track

• Issues not tracked on spreadsheet.

  • libopal isn't slurped into Open-MPI correctly (related to 7560)
    • Jeff and Brian will meet Friday and

master

• Heriarchacal collectives

  • If someone wants to do, PMIx has much of this information already.
  • Not too hard to do, and they're much faster. Will be in next version of competitor MPI
  • Probably not for v5.0

• Static linking is failing on master right now.

  • Issue 7560
  • May be an issue in static build support in PMIx and PRTE as well as how we're pulling it in.
  • Affects everything, just masked at the moment because static linking is broken.
  • Jeff will investigate
  • No progress.

• SLURM PMIx plugin has been locked on PMIx v2 for some time.

  • There are some NEW PMIx calls that SHOULD be added to bring it up.
    • Ralph has started a PR, but needs help.
  • So for now, there's some optional info that won't be passed correctly.
    • No OMPI_INFO for now.
    • Ralph gets pinged occasionally.
  • Not sure priority of this.

• MTT on master is looking pretty good.

Face to face

• Defered.

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Infrastrastructure

• scale-testing, PRs have to opt-into it.

Review Master Master Pull Requests

CI status

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Depdendancies

PMIx Update

• CI testing only tests build and did it run, but doesn't test HOW it ran.
  • Environment setup can be a bit different.
  • For example no-permissions in /tmp. Might pass on one machine, and fail on another without /tmp permissions.

ORTE/PRRTE

MTT

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