MPI_Topo_test(3) | Open MPI | MPI_Topo_test(3) |
MPI_Topo_test - Determines the type of topology (if any) associated with a communicator.
#include <mpi.h> int MPI_Topo_test(MPI_Comm comm, int *top_type)
USE MPI ! or the older form: INCLUDE 'mpif.h' MPI_TOPO_TEST(COMM, TOP_TYPE, IERROR) INTEGER COMM, TOP_TYPE, IERROR
USE mpi_f08 MPI_Topo_test(comm, status, ierror) TYPE(MPI_Comm), INTENT(IN) :: comm INTEGER, INTENT(OUT) :: status INTEGER, OPTIONAL, INTENT(OUT) :: ierror DOUBLE PRECISION MPI_Wtick() DOUBLE PRECISION MPI_Wtime()
#include <mpi.h> int Comm::Get_topology() const
The function MPI_Topo_test returns the type of topology that is assigned to a communicator.
The output value top_type is one of the following:
MPI_GRAPH graph topology
MPI_CART Cartesian topology
MPI_DIST_GRAPH distributed graph topology
MPI_UNDEFINED no topology
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_Cart_create
October 29, 2018 | 3.1.3 |