MPI_Allgather - Gathers data from all tasks and
distributes it
SYNOPSIS
C:
#include <mpi.h>
int MPI_Allgather ( sendbuf, sendcount, sendtype,
recvbuf, recvcount, recvtype, comm)
void *sendbuf;
int sendcount;
MPI_Datatype sendtype;
void *recvbuf;
int recvcount;
MPI_Datatype recvtype;
MPI_Comm comm;
C++:
#include <mpi.h>
void Intracomm::Allgather(
const void* sendbuf,
int sendcount,
const Datatype& sendtype,
void* recvbuf,
int recvcount,
const Datatype& recvtype) const
Fortran:
INCLUDE "mpif.h" (or USE MPI)
<type> SENDBUF(*), RECVBUF(*)
INTEGER sendcount, sendtype, recvcount, recvtype,
comm, ierror
CALL MPI_ALLGATHER(sendbuf, recvbuf, sendcount,
sendtype, recvcount, recvtype, comm, ierror)
STANDARDS
This release implements the MPI 1.2 standard, as
documented by the MPI Forum in the spring 1997 release of
MPI: A Message Passing Interface Standard.
DESCRIPTION
The MPI_Allgather routine gathers data from all tasks and
distributes it to all. This routine accepts the following
parameters:
buffer (choice)
sendcount Specifies the number of elements in the
send buffer (integer)
sendtype Specifies the data type of the send buffer
elements (handle)
recvcount Specifies the number of elements received
from any process (integer)
recvtype Specifies the data type of the receive
buffer elements (handle)
comm Specifies the communicator (handle)
recvbuf Returns the address of the receive buffer
(choice)
ierror Specifies the return code value for
successful completion, which is in
MPI_SUCCESS. MPI_SUCCESS is defined in the
mpif.h file.
Man(1) output converted with
man2html