29 Jun
2013
29 Jun
'13
3:08 p.m.
Yes. On Jun 29, 2013, at 3:05 PM, Jed Brown wrote:
Rajeev Thakur <[email protected]> writes:
It doesn't have to be a matching Wait. The implementation is required to make progress on other pending communication while it is blocked in a Wait.
Or blocked in any of a number of other places, if non-blocking collective requests have the same completion semantics as point-to-point requests. E.g., this shouldn't deadlock:
MPI_Iallreduce(...,COMM_WORLD,&req); if (!rank) MPI_Wait(&req); MPI_Allgather(...,COMM_WORLD); if (rank) MPI_Wait(&req);