#include "mpi.h"
int MPI_Alltoallv ( sendbuf, sendcnts, sdispls, sendtype, 
                    recvbuf, recvcnts, rdispls, recvtype, comm )
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) | |
| sendcounts | integer array equal to the group size 
specifying the number of elements to send to each processor | |
| 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 | |
| sendtype | data type of send buffer elements (handle) | |
| 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 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:alltoallv.c