MPI_Graph_get(3) | Open MPI | MPI_Graph_get(3) |
MPI_Graph_get - Retrieves graph topology information associated with a communicator.
#include <mpi.h> int MPI_Graph_get(MPI_Comm comm, int maxindex, int maxedges, int index[], int edges[])
USE MPI ! or the older form: INCLUDE 'mpif.h' MPI_GRAPH_GET(COMM, MAXINDEX, MAXEDGES, INDEX, EDGES, IERROR) INTEGER COMM, MAXINDEX, MAXEDGES, INDEX(*) INTEGER EDGES(*), IERROR
USE mpi_f08 MPI_Graph_get(comm, maxindex, maxedges, index, edges, ierror) TYPE(MPI_Comm), INTENT(IN) :: comm INTEGER, INTENT(IN) :: maxindex, maxedges INTEGER, INTENT(OUT) :: index(maxindex), edges(maxedges) INTEGER, OPTIONAL, INTENT(OUT) :: ierror
#include <mpi.h> void Graphcomm::Get_topo(int maxindex, int maxedges, int index[], int edges[]) const
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.
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.
MPI_Graph_create
MPI_Graphdims_get
December 18, 2020 | 4.1.0 |