MPI_Gather
--- Gathers together values from a group of processes
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)
- recvcount
- number of elements for any single receive (integer,
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_Gather ( sendbuf, sendcnt, sendtype, recvbuf, recvcount, recvtype,
root, comm )
void *sendbuf;
int sendcnt;
MPI_Datatype sendtype;
void *recvbuf;
int recvcount;
MPI_Datatype recvtype;
int root;
MPI_Comm comm;
Location: gather.c