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java.lang.Objectmpi.Comm
mpi.Intracomm
mpi.Cartcomm
public class Cartcomm
| Field Summary | 
|---|
| Fields inherited from class mpi.Comm | 
|---|
| group, mpjdevComm | 
| Method Summary | |
|---|---|
|  java.lang.Object | clone()Clone the communicator This method will be called only by intracommunicator .... | 
|  int[] | Coords(int rank)Translate process rank to logical process coordinates. | 
| static void | Dims_create(int nnodes,
            int[] dims)Select a balanced distribution of processes per coordinate direction. | 
|  CartParms | Get()Returns Cartesian topology information. | 
|  int | Map(int[] dims,
    boolean[] periods)Compute an optimal placement. | 
|  int | Rank(int[] coords)Translate logical process coordinates to process rank. | 
|  ShiftParms | Shift(int direction,
      int disp)Compute source and destination ranks for ``shift'' communication. | 
|  Cartcomm | Sub(boolean[] remain_dims)Partition Cartesian communicator into subgroups of lower dimension. | 
|  int | Topo_test()Returns the type of topology associated with the communicator. | 
| Methods inherited from class mpi.Intracomm | 
|---|
| Allgather, Allgatherv, Allreduce, Alltoall, Alltoallv, Barrier, Bcast, Create_cart, Create_graph, Create, Gather, Gatherv, Reduce_scatter, Reduce, Scan, Scatter, Scatterv, Split | 
| Methods inherited from class mpi.Comm | 
|---|
| Abort, Attr_delete, Attr_get, Bsend_init, Bsend, bsend, Compare, Create_intercomm, Free, Group, Ibsend, ibsend, Iprobe, Irecv, irecv, Irsend, irsend, Isend, isend, Issend, issend, Pack_size, Pack, Probe, Rank, Recv_init, Recv, recv, Rsend_init, Rsend, rsend, Send_init, Send, send, Sendrecv_replace, sendrecv, Sendrecv, Size, Ssend_init, Ssend, ssend, Test_inter, Unpack | 
| Methods inherited from class java.lang.Object | 
|---|
| equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Method Detail | 
|---|
public java.lang.Object clone()
                       throws MPIException
Intracomm
clone in class IntracommMPIException
public int Rank(int[] coords)
         throws MPIException
| coords | Cartesian coordinates of a process | 
| returns: | rank of the specified process | 
Java binding of the MPI operation MPI_CART_RANK.
MPIException
public int[] Coords(int rank)
             throws MPIException
| rank | rank of a process | 
| returns: | Cartesian coordinates of the specified process | 
Java binding of the MPI operation MPI_CART_COORDS.
MPIException
public ShiftParms Shift(int direction,
                        int disp)
                 throws MPIException
| direction | coordinate dimension of shift | 
| disp | displacement | 
| returns: | object containing ranks of source and destination processes | 
Java binding of the MPI operation MPI_CART_SHIFT.
MPIException
public Cartcomm Sub(boolean[] remain_dims)
             throws MPIException
| remain_dims | by dimension, true if dimension is to be kept, false otherwise | 
| returns: | communicator containing subgrid including this process | 
Java binding of the MPI operation MPI_CART_SUB.
MPIException
public int Map(int[] dims,
               boolean[] periods)
        throws MPIException
| dims | the number of processes in each dimension | 
| periods | true if grid is periodic, false if not, in each dimension | 
| returns: | reordered rank of calling process | 
Java binding of the MPI operation MPI_CART_MAP.
The number of dimensions is taken to be size of the dims argument.
MPIException
public CartParms Get()
              throws MPIException
| returns: | object containing dimensions, periods and local coordinates | 
Java binding of the MPI operations MPI_CARTDIM_GET and MPI_CART_GET.
The number of dimensions can be obtained from the size of (eg) dims field of the returned object.
MPIException
public int Topo_test()
              throws MPIException
Comm
| returns: | topology type of communicator | 
Java binding of the MPI operation MPI_TOPO_TEST.
The return value will be one of MPI.GRAPH, MPI.CART or MPI.UNDEFINED.
Topo_test in class CommMPIException
public static void Dims_create(int nnodes,
                               int[] dims)
                        throws MPIException
| nnodes | number of nodes in a grid | 
| ndims | number of dimensions of grid | 
| dims | array specifying the number of nodes in each dimension | 
Java binding of the MPI operation MPI_DIMS_CREATE.
Size dims should be ndims. Note that dims is an inout parameter.
MPIException| 
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