MPI_Comm_remote_size(3) Open MPI MPI_Comm_remote_size(3)
NAME
MPI_Comm_remote_size - Determines the size of the remote group associ-
ated with an intercommunicator.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Comm_remote_size(MPI_Comm comm, int *size)
Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_COMM_REMOTE_SIZE(COMM, SIZE, IERROR)
INTEGER COMM, SIZE, IERROR
Fortran 2008 Syntax
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
C++ Syntax
#include <mpi.h>
int Intercomm::Get_remote_size() const
INPUT PARAMETER
comm Communicator (handle).
OUTPUT PARAMETERS
size Number of processes in the remote group of comm (integer).
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_Comm_remote_size determines the size of the remote group associated
with an intercommunicator.
The intercommunicator accessors (MPI_Comm_test_inter, MPI_Comm_re-
mote_size, MPI_Comm_remote_group) are all local operations.
ERRORS
Almost all MPI routines return an error value; C routines as the value
of the function and Fortran routines in the last argument. C++ func-
tions 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.
SEE ALSO
MPI_Comm_test_inter
MPI_Comm_remote_group
MPI_Intercomm_create
MPI_Intercomm_merge
4.1.2 Nov 24, 2021 MPI_Comm_remote_size(3)
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