2025‐06‐16 meeting minutes

Attds: Stephen, Carl, Evan, Nicole, Gabriel, Vivek, Matthew

General Topics

• MPI C++ position paper

  • Mentions Kokkos Comm

• Possibly changing meeting time (no one from CEA today)

  • Monday at 10 am MT / 18:00 CET (?)
  • Tuesday at 10 am MT / 18:00 CET (?)
  • Carl will email Cedric

• TN Tech visited SNL four weeks ago

  • Nicole & exemplars for demonstrating/testing KokkosComm
  • Trilinos / Tpetra seems most advantageous
    • Carl will help with Kokkos Comm as a TPL
  • Matthew: don't expect much / any improvement from persistent (/+ partitioned) right away. May need to move beyond what MPI does

• In Progress Stuff

  • persistent: https://github.com/kokkos/kokkos-comm/pull/156
    • Nicole: Revised, waiting for more feedback from Cedric

• Vivek

  • LDMSCON last week of June
    • technologies for monitoring / analysis / tuning of HPC jobs

• Merged a few PRs for more MPI collectives

• Recording of KokkosComm talk at HPSFCon 2025 is available on YouTube: https://youtu.be/p0c-T-JDHh0

• MPI + Kokkos Tools + Profiling

  • MPI profiling overhauls in progress
  • Kokkos Tools incorporates MPI into some of its analysis / statistics
    • and other third-party tool connectors
  • How should / could Kokkos Comm make this easier?

Round Table

• Vivek
  • Out for a couple weeks
  • Kokkos tools spack package (handling of TPLs, including MPI)
    • https://github.com/spack/spack/issues/50550