MPI_Comm_remote_size(3) Open MPI MPI_Comm_remote_size(3)

MPI_Comm_remote_size - Determines the size of the remote group associated with an intercommunicator.

#include <mpi.h>
int MPI_Comm_remote_size(MPI_Comm comm, int *size)

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_COMM_REMOTE_SIZE(COMM, SIZE, IERROR)
	INTEGER	COMM, SIZE, IERROR

USE mpi_f08
MPI_Comm_remote_size(comm, size, ierror)
	TYPE(MPI_Comm), INTENT(IN) :: comm
	INTEGER, INTENT(OUT) :: size
	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

#include <mpi.h>
int Intercomm::Get_remote_size() const

Communicator (handle).

Number of processes in the remote group of comm (integer).
Fortran only: Error status (integer).

MPI_Comm_remote_size determines the size of the remote group associated with an intercommunicator.

The intercommunicator accessors (MPI_Comm_test_inter, MPI_Comm_remote_size, MPI_Comm_remote_group) are all local operations.

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.

Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

MPI_Comm_test_inter
MPI_Comm_remote_group
MPI_Intercomm_create
MPI_Intercomm_merge
November 24, 2021 4.1.2