[mpich-discuss] A bit of clarification on Bcast - Send - Recv

[Hiatt, Dave M]

First, I apologize for "if you node", if A node, sorry I think a lot faster than I can type (thank goodness for that).

My question revolves around a statement on Pg 66 of Using MPI, which led me to believe that I could use MPI::Recv to receive MPI::Bcast messages.  "An MPI::Recv does not have to check whether the message it has just received is part of a broadcast .....".  But in every attempt I have made to us MPI::Recv, it never responds to a MPI::Bcast.  I have assumed that I am making some bonehead mistake, but am now totally frustrated that I have failed to get this to work.  MPI::Bcast on the receiving node works fine as a receiver, but MPI::Recv does not for broadcast messages.  I am on 1.0.7 of MPICH2 by the way.

Thanks again
Dave


"Premature optimization is the root of all evil" - Donald Knuth
Dave Hiatt
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CitiMortgage, Inc.
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