Oct 7 2024

Attds: Carl, Gabriel, Cedric, Evan, Patrick, Stephen, Nicole, Vivek

Note-taker

General Topics

• #125 Stream-Ordered wait
• FYI, Kokkos developer meeting 11/12-11/15 @ ORNL (not KUG) (Cedric & Carl)
• FYI Supercomputing (11/16-11/23) (Cedric, Carl, Stephen, Patrick, Evan, Nicole)
  • maybe meet up at UNM booth
• EuroMPI happened (Hugo)
  • People seemed to understand what and why, are curious
  • Want to have some follow up with C++ / MPI people
• Cluster happened (Nicole & Evan)
  • People like the direct view support
  • Dr. Estela Suarez (?), modular supercomputing architecture & performance portability
  • General interest, esp in GPUs

Working Groups

• NCCL
• CI for GPUs (Carl)
• Applications
• Modern C++ / MPI
• Accelerator-Initiated Communication / Support
• Smart NICs

Round Table

• Carl
  • Sandia has implemented infrastructure changes, need to try them out.
• Gabriel
  • CMake PR merged
• Cedric
  • 2D matrix product example coming soon
• Evan
  • Stream triggering w/Patrick
• Patrick
  • Stream-triggered halo abstraction in Cabana, stream-triggered planning, coordination with HPE on an implementation (Tioga and Chicoma)
  • Using fine-grained zero copy memory on MI300/MI250 to remove an explicit copy
  • On MI250 you can't use device atomics on fine-grained memory
  • Do users need to be able to query memory properties to do the right thing?
• Nicole
  • Working with Cabana on Tioga
• Vivek
  • No updates, still thinking about Kokkos Tools + MPI
  • Useful for our own understanding of Kokkos Comm