#include "mpi.h" int MPI_Alltoallv ( void *sendbuf, int *sendcnts, int *sdispls, MPI_Datatype sendtype, void *recvbuf, int *recvcnts, int *rdispls, MPI_Datatype recvtype, MPI_Comm comm )
sendbuf | starting address of send buffer (choice)
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sendcounts | integer array equal to the group size
specifying the number of elements to send to each processor
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sdispls | integer array (of length group size). Entry
j specifies the displacement (relative to sendbuf from
which to take the outgoing data destined for process j
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sendtype | data type of send buffer elements (handle)
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recvcounts | integer array equal to the group size
specifying the maximum number of elements that can be received from
each processor
| |
rdispls | integer array (of length group size). Entry
i specifies the displacement (relative to recvbuf at
which to place the incoming data from process i
| |
recvtype | data type of receive buffer elements (handle)
| |
comm | communicator (handle)
|
All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in 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 last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Errhandler_set; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error.
Location:alltoallv.c