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Does anyone know how or if one could use callback procedures
in MPI? For instance, if you wanted to pass a message from
one process to others transparently, you would want to post
an IRecv and attach a callback procedure that would execute
the ISend to the next process in line as soon as the receive
was completed.
Without this, it looks like any sort of non-blocking
collective operation is doomed to blocking behavior on
intermediate processes, unless you manually intersperse
lots of IProbe commands in your code.
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