MPI_Alltoallv

Input Parameters

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)

Output Parameter

recvbuf

address of receive buffer (choice)

Synopsis

#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;

Location: alltoallv.c