MPI_COMM_SIZE(3)MPI_COMM_SIZE(3)NAMEMPI_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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