WeeklyTelcon_20230725

Open MPI Weekly Telecon ---

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

Attendees (on Web-ex)

• Tommy Janjusic (NVIDIA)
• Geoff Paulsen (IBM)
• Jeff Squiyres (Cisco)
• Howard Pritchard (LANL)
• Luke Robison (AWS)
• Edgar Gabriel (AMD)
• Quincey Koziol (AWS)
• Thomas Naughton (ORNL)
• Todd Kordenbrok (Sandia)
• Tommy J (nVidia)

V4.1

• Readying release Needed to make a change for external pmix - ompi that's out there (v4.1.5) does not support pmix version XX - had to make a change to support taht. Small number of other changes and bug fixes that made it to the branch, low impact release.

V5.0

Old/New Issues:

• https://github.com/open-mpi/ompi/issues/11532

  • Got good discussion on what needs to be done.
  • Jeff wrote his notes at the bottom.

• Update mpirun man page #11730 - Quincey / Jeff, need first part to be completed by Jeff

  • Continues making good progress, iterating with Ralph.

• https://github.com/open-mpi/ompi/issues/10099 Edgar - oing to push the first part of the patch, second part (Fortran stuff) will need help from Jeff.

  • Done - v5.0.x PR - Dying

  • Geoff will follow up the IBM-CI

  • IMPORTANT part of ABI claim - ABI for C We support Fortran ABI, except 3 minor cases, and assuming you're using the Fortran Compilers.

• https://github.com/open-mpi/ompi/pull/11818/ - need to see what George says, if he nixes the current proposal we're going to open up PR to address the structure issues.

  • All sorted out. Done.
  • Needs to go back to v5.0.x

• https://github.com/open-mpi/ompi/issues/7668 - review the current output and updated changes

  • This is WHY we need to document many of the new behaviors in v5.0.x
  • Behavior has changed, and need to document the new behavior.

• https://github.com/open-mpi/ompi/issues/11734 - need to review and close (could be addressed), big one is how to build with ompi v5.0 *

• https://github.com/open-mpi/ompi/issues/11831

  • Change to cuda component causes some issues.
  • Delayed init DID work... but when mixed with the cuda component disqualifying itself causes issues.
    • May be a blocker???

• https://github.com/open-mpi/ompi/issues/11798

  • Ompi v4.1. cuda mem cpy issue: 11798 (Tommy)
  • OMPIO should be able to write from Device Memory directly into File.
  • This used to work.
  • Reported this against v4.1.x

• https://github.com/open-mpi/ompi/issues/10657

  • Open table in Docs
  • If you're going to launch with mpirun/PRTE - requires PRTE v3
    • Because then we're locked into PMIx v4.1.2
  • Earlier we'd said we'd really like to support earlier versions of PMIx?
    • Potentially pre-installed on the system.
  • Direct Launch - you could go all the way back to PMIx v3 but would have to configure without sessions and without ULFM.
    • ULFM does need newer than sessions needs.
  • Don't like to make decisions based on versions, want to make decisions based on capabilities
  • Keep the table the same for both direct launch and mpirun launch (unless we need to)
    • Meeting on this tomorrow.