MPI_Comm_size - Determines the size of the group
associated with a communicator
SYNOPSIS
C:
#include <mpi.h>
int MPI_Comm_size ( comm, size )
MPI_Comm comm;
int *size;
C++:
#include <mpi.h>
int Comm::Get_size() const
Fortran:
INCLUDE "mpif.h" (or USE MPI)
INTEGER comm, size, ierror
CALL MPI_COMM_SIZE(comm, size, ierror)
STANDARDS
This release implements the MPI 1.2 standard, as
documented by the MPI Forum in the spring 1997 release of
MPI: A Message Passing Interface Standard.
DESCRIPTION
The MPI_Comm_size routine determines the number of
processes in the group associated with a communicator.
This routine accepts the following parameters:
comm Specifies the communicator (handle)
size Returns the number of processes in the group of
comm (integer)
ierror Specifies the return code value for successful
completion, which is in MPI_SUCCESS.
MPI_SUCCESS is defined in the mpif.h file.
NOTES
MPI_COMM_NULL is not considered a valid argument to this
function.
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