06 17 2020 - openucx/ucx GitHub Wiki

Participants

• Manjunath Gorentla Venkata
• Sergey Lebedev
• Valentin Petrov
• Alex Margolin
• Gil Bloch
• Ken Raffenetti

Discussion on the UCC interface details

1. Discussion on Thread model

   • MPI/SHMEM_THREAD_SERIALIZED to be mapped onto UCC_THREAD_FUNNELED Conclusion: Support three threads models - SINGLE, SERIALIZED, and MULTIPLE.

2. Discussion Input/output Buffer ownership Conclusion:

   • Library to own the buffers - during the ucc_collective_init, post, and test calls.
   • User to own the buffers between the init and post calls

3. FP16 and BFloat16

   • Support FP16 reductions for now, and punt BFloat16 support for later

4. Split operation

   • Support the current interface, not a generic interface
   • ucc_status_t ucc_team_create_from_parent( uint64_t my_ep, bool included, ucc_team_h parent_team, ucc_team_h *new_ucc_team);

5. Discussed the component diagram and freeze the changes for now

Next Meeting

• June 24th, 2020