[mpich-discuss] Communicator conundrum
Michael L. Stokes
michael.stokes at uah.edu
Tue Aug 22 16:36:13 CDT 2017
I do apologize if this is going to the wrong group so please recommend
another group if inappropriate. I do see it as a possible implementation
I have a main program that spawns an MPI process A, and a second spawn
from main that spawns MPI process B. What I need is to create a
communicator between processes A and B. I don't see a way to do this
with the current implementation.
I do see a way to do this if the local_comm and the peer_comm arguments
in the MPI_Intercomm_create() function called in A and B could be the
parent_comm in both processes. Since you can't use the same argument
for local_comm and peer_comm in the current implementation, I don't see
a path forward.
Am I missing something here? Is there another way to create a comm
between A and B?
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