MPI_Exscan function

Computes the exclusive scan (partial reductions) of data on a collection of processes.

Syntax

int MPIAPI MPI_Exscan(
  _In_  void         *sendbuf,
  _Out_ void         *recvbuf,
        int          count,
        MPI_Datatype datatype,
        MPI_Op       op,
        MPI_Comm     comm
);

Parameters

• sendbuf [in]
  Starting address of send buffer.

• recvbuf [out]
  Starting address of receive buffer.

• count
  Number of elements in input buffer.

• datatype
  Data type of elements of input buffer.

• op
  Operation.

• comm
  Communicator.

Return value

Returns MPI_SUCCESS on success. Otherwise, the return value is an error code.

In Fortran, the return value is stored in the IERROR parameter.

Fortran

    MPI_EXSCAN(SENDBUF, RECVBUF, COUNT, DATATYPE, OP, COMM, IERROR)
        <type> SENDBUF(*), RECVBUF(*)
        INTEGER COUNT, DATATYPE, OP, COMM, IERROR

Requirements

Product	HPC Pack 2012 MS-MPI Redistributable Package, HPC Pack 2008 R2 MS-MPI Redistributable Package, HPC Pack 2008 MS-MPI Redistributable Package or HPC Pack 2008 Client Utilities
Header	Mpi.h; Mpif.h
Library	Msmpi.lib
DLL	Msmpi.dll

See also

MPI Collective Functions