Routines for managing groups

Group Management

• Operations on groups are local and involve no communication.
• Can convert rank in one group to rank in a second group:

       mpi_group_translate (group1, n, ranks1,
                            group2, ranks2, ierr)

• Can check if two groups are the same:

       mpi_group_compare (group1, group2,
                          result, ierr)

• Can extract group associated with communicator:

       mpi_comm_group (comm, group, ierr)

• Can mark group object for deallocation:

       mpi_group_free (group, ierr)