WeeklyTelcon_20230530

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

• Tommy Janjusic (nVidia)
• Jeff Squires (CISCO)
• Luke Robison (Amazon)
• Thomas Huber
• Todd Kordenbrock
• Amir (ORNL)
• Howard Pritchard (LANL)
• Ralph Castain
• David Bernholdt (ORNL)

New Issues:

• #11722 - Cannot build+install with out of source builds (VPATH)

  • Possible blocker, need to update submodule pointers.

• #11726 -N bind ppr:X:node, map by package (socket), or core

v4.1

• No updates

v5.0

Current issues:

• PMIX v4.2 async modex issue: https://github.com/openpmix/openpmix/issues/3077

  • Work around: -x PMIX_MCA_gds=hash or enable opal_pmix_collect_all_data
  • Need to up the timeout, fix in OMPI before PMIX_Get, increase timeout as a function of scale with user override.
  • Likely that the original issue is missing an additional variable for async modex. to ompi_pml_base_check_pml
  • New parameter exists for v5.0.x MUST be documented,

• MCA Params issues are biggest issues now - no new updates.

  • https://github.com/openmpi/ompi/issues/11532
  • https://github.com/openpmix/prrte/issues/1731
  • Plan is to have 2 of the 3 fixes for v5.0.0, 3rd issue can wait for 5.0.x
  • Quincy assigned, working on docs first.

• Need to cherry-pick NIC selection (distances PR fixes) to v5.0.x

  • Several PRs will go into main, including coverity fixes.
  • Amir to open up a v5.0.x PR to track all main commits and cherry-pick to v5.0.x when finished.
  • Pending review -
  • Will create initial v5.0.x PR as a pre-PR for the NIC selection: needs review

• UCX and enable mca dso do not mix issue: https://github.com/open-mpi/ompi/issues/11632

  • Fix: https://github.com/open-mpi/ompi/pull/11640

• Issue #11532: mca_base_param_files option is no longer read

  • PMIX command line parsing issue fixed the first stage completed, next stage fix over the next few days.

• PR 11681 Propagate the error from callback *Legit bug fixed by George but introduced behavior change, need community review.