Hui Zhou

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I submit it's a lost battle for me.

Fixed by https://github.com/pmodels/mpich/pull/7671

``` MPIR_Assert(MPIDI_POSIX_global. per_vci[vci].active_rreq[transaction.src_local_rank] == NULL); MPIDI_POSIX_global.per_vci[vci].active_rreq[transaction.src_local_rank] = rreq; ``` The `vci` index points to unique MPIX stream. The assertion checks for messaging protocol consistency. If it gets an initial packet...

> Thanks for the response. What does this mean in terms of what I can and cannot do with streams? I assume this means that on the same stream, I...

Also, the streams do not progress or order with each other. So watch out potential deadlocks due to race conditions between different streams.

`MPI_Stream_progress` will progress all operation on the stream.

This patch has issues: https://jenkins-pmrs.cels.anl.gov/job/mpich-review-ch4-gpu-ofi/411/

Reference: https://github.com/pmodels/mpich/pull/7193

@mjwilkins18 Looks good. Do you have any performance anecdotes for the impact of this PR on aurora?