Per PE Quiet

[manjugv]

Problem :

To complete all RMA operations that are posted from a particular PE to a particular target PE, the OpenSHMEM programs can call shmem_quiet. The shmem_quiet operation, however, completes the RMA operations from the calling PE to all PEs. For system configuration, where shmem_quiet is expensive this is unnecessary overhead.

Proposal :

Introduce PE specific completion routines that complete RMA operations from the calling PE to the target PE

shmem_pe_quiet(target_pe)
shmem_ctx_pe_quiet(ctx, target_pe)

PR describing the interface and semantics

Impact on Users:

This provides a light-weight alternative for shmem_quiet if the OpenSHMEM programs desire to complete operations from the calling PE to the target PE. There is no change in semantics for the current shmem_fence interface.

Impact on implementation:

Implementations will have to implement the new interface shmem_pe_quiet(target_pe) and its context variants shmem_ctx_quiet(ctx, int target_pe)

[manjugv]

Threads WG Discussion: Will read in the next spec meeting.