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MPI_Win_flush.3.rst

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MPI_Win_flush

:ref:`MPI_Win_flush`, :ref:`MPI_Win_flush_all` - Complete all outstanding RMA operations at both the origin and the target

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Win_flush (int rank, MPI_Win win)

int MPI_Win_flush_all (MPI_Win win)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_WIN_FLUSH(RANK, WIN, IERROR)
     INTEGER RANK, WIN, IERROR

MPI_WIN_FLUSH_ALL(WIN, IERROR)
     INTEGER WIN, IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Win_flush(rank, win, ierror)
     INTEGER, INTENT(IN) :: rank
     TYPE(MPI_Win), INTENT(IN) :: win
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

MPI_Win_flush_all(win, ierror)
     TYPE(MPI_Win), INTENT(IN) :: win
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT PARAMETERS

  • rank: Rank of window (nonnegative integer).
  • win: Window object (handle).

OUTPUT PARAMETER

  • ierror: Fortran only: Error status (integer).

DESCRIPTION

:ref:`MPI_Win_flush` completes all outstanding RMA operations initiated by the calling process to the target rank on the specified window. The operations are completed both at the origin and at the target. :ref:`MPI_Win_flush_all` completes all outstanding RMA operations to all targets.

Can only be called from within a passive target epoch.

ERRORS

.. seealso::
   * :ref:`MPI_Win_flush_local`
   * :ref:`MPI_Win_lock`
   * :ref:`MPI_Win_lock_all`