Meeting 2022 03 17 - openpmix/openpmix GitHub Wiki

03/17/2022 OpenPMIx-devel call notes

Attendees

  • Samuel Gutierrez (LANL)
  • Matthew Baker (ORNL)
  • Ralph Castain (Nanook)
  • Thomas Naughton (ORNL)
  • Michael Karo (Altair)
  • Howard Pritchard (LANL)

Notes

  • Fixes in pmix/prrte

  • PMIx_Get bug found/fixed that hit rare case where can get false not-found, only impacted the direct modex (dmodex). New dmodex test in place to test. Fixed on master. Partly in pmix and partly in prte

  • Some OMPI schizo fixes to ensure the command line behaves as needed

  • Configury cleanups by Brian for pmix and prte, another coming to support static builds for pmix, also will impact prte

  • Need to decide what gets pulled to other release branches

  • Gist of branches

    • PMIx v4.2.x -- incorporates the ABI related changes,

      • macros moved either to full functions in API or add few e.g., add argv backing functions as static inline functions in header

    • PRRTE v2.1 -- main change here was the command-line processing

      • interest in having isolation between the different users of prte, e.g., ompi diff args than others.

    • master (PMIx and PRRTE)

      • work to reduce code duplication (e.g., bugs must be fixed multiple times if found in MCA)
      • prte becoming more dependent on PMIx, pushing out of PRTE into PMix to avoid having that code duplication
      • This causes problems for porting fixes to prte to older branches b/c the newer PRTE does not include those code refactoring to leverage more of PMIx (to avoid prte dup code).
      • if add these refactoring into branches, simplifies backport of maintenance code, but increases the amount of changes for the release

  • Q: Backport of master to v2.1.x and v4.2.x. Would like to avoid bringing those changes to v2.0.x/v4.1.x

  • Open MPI is currently using prte-v2.0.x / pmix-v4.1.x, but will need to shift to prte-v2.1.x / pmix-v4.2.x

  • SLURM breakage w/ PRRTE, not exactly sure when the break occurred. Related to slurm env vars.

  • Q: Have chance for attribute for pmix group construct?

    • Ralph - mostly done, just need little more work to finish off
    • Howard - have code for test/kick-tires when ready
    • Note, OMPI issue related to this that could replace much code with single call to pmix_group w/ CID.

  • Sam working on improving the shared memory support (adding into master)

  • Added support to configury to avoid static build when using python bindings. Due to problems with cython not support a static build.