[Mpi-forum] behavior of NBC for intracommunicators when root == MPI_PROC_NULL

[Fab Tillier]

Hi Folks,

I can't find anything in the standard document that explains the behavior for NBC requests on intercommunicators when root == MPI_PROC_NULL.  Taking MPI_Ibcast as an example, what is the output value of request?  Is it MPI_REQUEST_NULL?  Is it not set at all?  Is it a valid request that must be completed?

Thanks,
-Fab
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mpi-forum.org/pipermail/mpi-forum/attachments/20141211/c3134398/attachment.html>