WeeklyTelcon_20240611

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Tommy Janjusic edited this page Jun 10, 2024 · 5 revisions

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

TBA

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

Additional Agenda Items

Now we have our own PRRTE. People should watch out for pull requests https://github.com/open-mpi/prrte/pulls
ompi/pull/12356
cuda reduction, cuda mem topic (Joseph)
acoll PR, needs to be merged for v6.0

TODO

Notes

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