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Subject: Re: [OMPI devel] RFC: sm Latency
From: Ron Brightwell (rbbrigh_at_[hidden])
Date: 2009-01-21 18:49:23


> > Possibly, you meant to ask how one does directed polling with a wildcard
> > source MPI_ANY_SOURCE. If that was your question, the answer is we
> > punt. We report failure to the ULP, which reverts to the standard code
> > path.
>
> Sorry, I meant ANY_SOURCE. If you poll only the queue that correspond to
> a posted receive, you only optimize micro-benchmarks, until they start
> using ANY_SOURCE.
> [...]

Note that the HPCC RandomAccess benchmark only uses MPI_ANY_SOURCE (and
MPI_ANY_TAG).

-Ron