WeeklyTelcon_next

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

• TBA

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v4.1.x

• v4.1.x Issues; v4.1.x Questions
• v4.1.x Open PRs
• Next release end of Q1. Jeff and Brian will take it on a as-needed basis.

v5.0.x

• New issues since v5.0.3
• Open PRs since v5.0.3
• Closed/Merged PRs since v5.0.3
• v5.0.x Open PRs
• v5.0.x Issues; v5.0.x Questions
• PRTE issue if PMIx upgrades from v4.x to v5.x without also rebuilding PRTE
  • PMIx changed some internal data structures between v4.x and v5.x (specifically, they are not part of the PMIx public API).
  • The PMIx public API did not change between v4.x and v5.x, so the libpmix .so number did not change to reflect an incompatibility.
  • PRTE uses the internal PMIx data structures, however, and is affected by the changes between PMIx v4.x and v5.x.
  • Meaning: if you build+install PRTE against PMIx v4.x and then upgrade to PMIx v5.x without also re-building PRTE, PRTE will almost certainly segv.
  • Since PRTE is the back-end of mpirun, this affects Open MPI as well.
  • Upstream PRTE is likely to put in a run-time check to print an error and abort (before segv'ing) when detecting this case.
  • https://github.com/openpmix/prrte/pull/1982

Main branch

• Main Issues
• Main PRs

Additional Agenda Items

• Now we have our own PRRTE. People should watch out for pull requests https://github.com/open-mpi/prrte/pulls

TODO

• Need to discuss MPI 4.1
• Need to discuss MPI 4.0
• Discuss set v5.0.4 timeline
• Discuss v6.0 feature list and timeline
• Discuss 6.0: BigCount
• Explore cherry-pick bots
• Explore an MTT alternative

Notes