#include "mpi.h" int MPI_Cart_create ( comm_old, ndims, dims, periods, reorder, comm_cart ) MPI_Comm comm_old; int ndims; int *dims; int *periods; int reorder; MPI_Comm *comm_cart;
comm_old  input communicator (handle)
 
ndims  number of dimensions of cartesian grid (integer)
 
dims  integer array of size ndims specifying the number of processes in
each dimension
 
periods  logical array of size ndims specifying whether the grid is
periodic (true) or not (false) in each dimension
 
reorder  ranking may be reordered (true) or not (false ) (logical)

All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGERin Fortran.
All MPI routines (except MPI_Wtime and MPI_Wtick) return an error value; C routines as the value of the function and Fortran routines in the lastargument. Before the value is returned, the current MPI error handler iscalled. By default, this error handler aborts the MPI job. The error handlermay be changed with MPI_Errhandler_set; the predefined error handlerMPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue pastan error.
Location:cart_create.c