MPI_Allreduce

--- Combines values from all processes and distribute the result back to all processes

Input Parameters

sendbuf: starting address of send buffer (choice)

count: number of elements in send buffer (integer)

datatype: data type of elements of send buffer (handle)

op: operation (handle)

comm: communicator (handle)

Output Parameter

recvbuf: starting address of receive buffer (choice)

Synopsis


#include "mpi.h"
int MPI_Allreduce ( sendbuf, recvbuf, count, datatype, op, comm )
void             *sendbuf;
void             *recvbuf;
int               count;
MPI_Datatype      datatype;
MPI_Op            op;
MPI_Comm          comm;

Location: allreduce.c