WeeklyTelcon_20240611

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Tommy Janjusic edited this page Jun 11, 2024 · 5 revisions

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

Tommy Janjusic (NVIDIA)
Jeff Squyres (CISCO)
Luke Robison (Amazon)
Edgar Gabriel (AMD)
Todd Kordenbrock
Manu Shantharam (AMD)
Howard Pritchard (LANL)
Wenduo Wang (Amazon)
George Bosilca (NVIDIA)
Josheph Schuhart (SBU)
Todd Kordenbrock
Aurelien Bouteiller (UTK)

v4.1.x

v4.1.x Issues; v4.1.x Questions
v4.1.x Open PRs
Next release when cycles allow it, or if there is a emergency

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.
- See https://github.com/openpmix/prrte/pull/1982 , pull this PR into our fork
- Runtime test suite, from IBM check with Josh H.
  - Check requirements, there was an IBM CI running on PRRTE (sept. 2023),

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)
- https://github.com/open-mpi/ompi/pull/12356 , merge
- Add CUDA/HIP implementations of reduction operators #12569 (large PR, needs reviewers)
  - only have the CUDA backend, generate HIP *
acoll PR, needs to be merged for v6.0
- https://github.com/open-mpi/ompi/pull/12484
  - needs to be reviewed, disabled by default
Large count stuff before fork
**Fork sometime in v6.0 July **
Introduce new JSON parser utility #12531

TODO

Notes

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