Inter-Communication

boolean Comm.Test_inter()

returns:

true if this is an inter-communicator, false otherwise

Test if this communicator is an inter-communicator. Java binding of the MPI operation MPI_COMM_TEST_INTER.

int Intercomm.Remote_size()

returns:

number of process in remote group of this communicator

Size of remote group. Java binding of the MPI operation MPI_COMM_REMOTE_SIZE.

Group Intercomm.Remote_Group()

returns:

remote group of this communicator

Return the remote group. Java binding of the MPI operation MPI_COMM_REMOTE_GROUP.

Intercomm Comm.Create_intercomm(Comm local_comm, int local_leader,
                                int remote_leader, int tag)

local_comm	local intra-communicator
local_leader	rank of local group leader in localComm
remote_leader	rank of remote group leader in this communictor
tag	``safe'' tag
returns:	new inter-communicator

Create an inter-communicator. Java binding of the MPI operation MPI_INTERCOMM_CREATE.

• Rationale. This operation is defined as a method on the ``peer communicator'', making it analogous to a Send or Recv communication with the remote group leader.(End of rationale.)

Intracomm Intercomm.Merge(boolean high)

high	true if the local group has higher ranks in combined group
returns:	new intra-communicator

Create an intra-communicator from the union of the two groups in the inter-communicator. Java binding of the MPI operation MPI_INTERCOMM_MERGE.