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MPI_Comm_remote_size(3) man page (version 1.8)

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Table of Contents

Name

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

Syntax

C Syntax


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

Fortran Syntax


INCLUDE ’mpif.h’
MPI_COMM_REMOTE_SIZE(COMM, SIZE, IERROR)
    INTEGER    COMM, SIZE, 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_remote_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++ 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.

See Also


MPI_Comm_test_inter
MPI_Comm_remote_group
MPI_Intercomm_create
MPI_Intercomm_merge

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