The short answer is no. You can not at this time create a window with
an intercommunicator. You can use MPI_Intercomm_merge to join the two
groups and make a window using that communicator.
There has been some discussion in the MPI Forum about allowing windows
to be created on intercommunicators.
Hi,
Can comm_spawn be used with win_create?
For ex:
Master process:
---
MPI_Comm_spawn(worker_program,MPI_ARGV_NULL, world_size-1,
info, 0, MPI_COMM_SELF, &everyone,
MPI_ERRCODES_IGNORE);
MPI_Win_create(&testval, sizeof(double), 1,
