MPI_Graphdims_get(3)

NAME
     MPI_Graphdims_get - Retrieves graph topology information associated with
     a communicator

SYNOPSIS
     C:

          #include <mpi.h>

          int MPI_Graphdims_get ( comm, nnodes, nedges )
          MPI_Comm  comm;
          int              *nnodes;
          int              *nedges;


     C++:

          #include <mpi.h>

          void Graphcomm::Get_dims(
          int               nnodes[],
          int               nedges[]) const


     Fortran:

          INCLUDE "mpif.h" (or USE MPI)

          INTEGER comm, nnodes, nedges, ierror

          CALL MPI_GRAPHDIMS_GET(comm, nnodes, nedges, 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_Graphdims_get routine retrieves graph topology information
     associated with a communicator.  This routine accepts the following
     parameters:

     comm      Specifies the communicator for a group with a graph structure
               (handle)

     nnodes    Returns the number of nodes in a graph (integer)

     nedges    Returns the number of edges in a graph (integer)
     ierror    Specifies the return code value for successful completion,
               which is in MPI_SUCCESS.  MPI_SUCCESS is defined in the mpif.h
               file.