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mpi_graphdims_get(3openmpi) [osx man page]

MPI_Graphdims_get(3OpenMPI)											       MPI_Graphdims_get(3OpenMPI)

NAME
MPI_Graphdims_get - Retrieves graph topology information associated with a communicator. SYNTAX
C Syntax #include <mpi.h> int MPI_Graphdims_get(MPI_Comm comm, int *nnodes, int *nedges) Fortran Syntax INCLUDE 'mpif.h' MPI_GRAPHDIMS_GET(COMM, NNODES, NEDGES, IERROR) INTEGER COMM, NNODES, NEDGES, IERROR C++ Syntax #include <mpi.h> void Graphcomm::Get dims(int nnodes[], int nedges[]) const INPUT PARAMETER
comm Communicator for group with graph structure (handle). OUTPUT PARAMETERS
nnodes Number of nodes in graph (integer). nedges Number of edges in graph (integer). IERROR Fortran only: Error status (integer). DESCRIPTION
Functions MPI_Graphdims_get and MPI_Graph_get retrieve the graph-topology information that was associated with a communicator by MPI_Graph_create. The information provided by MPI_Graphdims_get can be used to dimension the vectors index and edges correctly for a call to MPI_Graph_get. 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_Graph_create MPI_Graph_get Open MPI 1.2 September 2006 MPI_Graphdims_get(3OpenMPI)

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MPI_Graph_get(3OpenMPI) 												   MPI_Graph_get(3OpenMPI)

NAME
MPI_Graph_get - Retrieves graph topology information associated with a communicator. SYNTAX
C Syntax #include <mpi.h> int MPI_Graph_get(MPI_Comm comm, int maxindex, int maxedges, int *index, int *edges) Fortran Syntax INCLUDE 'mpif.h' MPI_GRAPH_GET(COMM, MAXINDEX, MAXEDGES, INDEX, EDGES, IERROR) INTEGER COMM, MAXINDEX, MAXEDGES, INDEX(*) INTEGER EDGES(*), IERROR C++ Syntax #include <mpi.h> void Graphcomm::Get_topo(int maxindex, int maxedges, int index[], int edges[]) const INPUT PARAMETERS
comm Communicator with graph structure (handle). maxindex Length of vector index in the calling program (integer). maxedges Length of vector edges in the calling program (integer). OUTPUT PARAMETERS
index Array of integers containing the graph structure (for details see the definition of MPI_Graph_create). edges Array of integers containing the graph structure. IERROR Fortran only: Error status (integer). DESCRIPTION
Functions MPI_Graphdims_get and MPI_Graph_get retrieve the graph-topology information that was associated with a communicator by MPI_Graph_create. The information provided by MPI_Graphdims_get can be used to dimension the vectors index and edges correctly for a call to MPI_Graph_get. 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_Graph_create MPI_Graphdims_get Open MPI 1.2 September 2006 MPI_Graph_get(3OpenMPI)
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