Accelerator Synchronous MPI Operations

[jdinan]

Summary

This is a meta-ticket linking various approaches to accelerator synchronous communication under discussion in the HACC working group.

What is Accelerator Synchronous?

"Accelerator Synchronous" refers to the accelerator directly synchronizing with MPI operations to resolve incoming and/or outgoing data dependencies. For example, this synchronization could be structured through a GPU stream or graph.

Approaches Under Discussion

1. Stream and Graph Based MPI Operations #5 (Jim Dinan)
2. MPIX_Queue (Naveen Ravichandrasekaran)
3. Project Delorean (Quincey Koziol)
4. MPIX Stream #12 (Hui Zhou)
5. Persistent Operation-based Stream Triggering API #14 (Patrick Bridges)