Robert Kubrick wrote:
You should be able to merge each child communicator from each accept thread into a global comm anyway.
Can you elaborate? I am struggling to see how to implement this. A pointer to sample code would be helpful.
Specifically, I'd like to be able to have a single process merge/join/aggregate a bunch of intercommunicators into one group and have a single communicator for it. FWIW, the intercommunicators are point-to-point from several calls to MPI_Comm_join.
MPI_Group_union looks promising, but I cannot see any way of retrieving the communicator given a group.
