2026 06 04 meeting minutes

Attendees: Carl, Cedric, Gabriel, Evan, Nicole

General Topics

Changelog (post 0.1)

• Cedric will give this a try, follow up after his absence
• changelog.md, modified when we merge a PR
  • When you open a PR, you get a number -> add a commit to your PR that adds the PR to the changelog

• Planning for 0.2 (end of June, PASC):
  • static_assert on GPU buffers in MPICH
  • fix MPI detection in cray-mpich (Carl)
    • Workaround at configure time to say that MPI is MPICH
  • Non-GPU-aware MPI host staging (Gabriel)
    • staging / packing / etc logic is repeated everywhere, working on abstraction
  • Spack package recipe (Cedric)
    • draft PR open in spack repo
  • NCCL and MPI results from the same code (Gabriel)
    • OSU-style latency benchmark (MPI + NCCL enabled at the same time)
      • Gabriel: some overhead from fence in MPI backend (hopefully not present in stream-triggered backend)
      • Open draft PR so Nicole can use (Gabriel)
    • Heat3D benchmark in her fork -> open a PR (Nicole)
  • Blog post (Carl)
  • Fixing documentation (Carl)
    • Cedric opened #201
    • Things have been partially addressed in multiple PRs that have been merged recently
  • miniFE port (Carl)
  • Lulesh port (Gabriel + minions)
    • port is working, but not 1-1 of existing code (some refactor, etc)
  • Stream Triggering (Evan)
    • presentation in 2wks or 4wks, get feedback on interface
  • MPICH + CUDA test runner (Carl)
  • Known Issues in documentation

• Initialize NCCL once per test binary rather than once per test. Improves run time a lot.

Carried forward from last time

• Updates on CI dev container? (Cedric)
  • draft PR open

Round Table

• Nicole

  • PASC slides due in 1 wk

• Carl

  • preparing 20 minute talk to NNSA/CEA meeting in Lyon June 16th (given by Ron Brightwell)

• Gabriel / Cedric

  • Kokkos Comm tutorial to RIKEN. No tutorial material exists yet.
  • Evan/Nicole have some slides presented to undergrads
    • Nicole will upload to docs/tutorials for now