thanks! I see expected behaviour by setting MPICH_ASYNC_PROGRESS (mpich compiled with --enable-threads=multiple) On Tue, Feb 9, 2016 at 10:22 PM, Jed Brown <[email protected]> wrote:

Rob Latham <[email protected]> writes:

...

MPICH takes a weak interpretation of the progress rule, but one can emulate strict interpretation by spawning a thread whose one job in life is to call MPI_Test repeatedly.

... or define the MPICH_ASYNC_PROGRESS environment variable.

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