On Sep 23, 2010, at 10:54 AM, Richard Treumann wrote:
> I do not agree with Jeff on this below. The Proc 1 case where the MPI_Waits are reversed simply requires the MPI implementation to make progress on both MPI_Ibcast operations in the first MPI_Wait. The second MPI_Wait call will simply find that the first MPI_Ibcast is already done. The second MPI_Wait call becomes, effectively, a query function.
Er -- yes, you're right. I was incorrectly thinking about overtaking issues -- but they don't apply here.
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