MPI_Gatherv

Input Parameters

sendbuf

starting address of send buffer (choice)

sendcount

number of elements in send buffer (integer)

sendtype

data type of send buffer elements (handle)

recvcounts

integer array (of length group size) containing the number of elements that are received from each process (significant only at root)

displs

integer array (of length group size). Entry i specifies the displacement relative to recvbuf at which to place the incoming data from process i (significant only at root)

recvtype

data type of recv buffer elements (significant only at root) (handle)

root

rank of receiving process (integer)

comm

communicator (handle)

Output Parameter

recvbuf

address of receive buffer (choice, significant only at root)

Synopsis

#include "mpi.h"
int MPI_Gatherv ( sendbuf, sendcnt,  sendtype, 
                  recvbuf, recvcnts, displs, recvtype, 
                  root, comm )
void             *sendbuf;
int               sendcnt;
MPI_Datatype      sendtype;
void             *recvbuf;
int              *recvcnts;
int              *displs;
MPI_Datatype      recvtype;
int               root;
MPI_Comm          comm;

Location: gatherv.c