bionic (3) MPI_Win_post.3.gz

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NAME

       MPI_Win_post -  Start an RMA exposure epoch

SYNOPSIS

       int MPI_Win_post(MPI_Group group, int assert, MPI_Win win)

INPUT PARAMETERS

       group  - group of origin processes (handle)
       assert - Used to optimize this call; zero may be used as a default.  See notes. (integer)
       win    - window object (handle)

NOTES

       The  assert  argument is used to indicate special conditions for the fence that an implementation may use
       to optimize the MPI_Win_post operation.  The value zero is always correct.  Other assertion values may be
       or'ed together.  Assertions that are valid for MPI_Win_post are:

       MPI_MODE_NOCHECK
              -  the matching calls to MPI_WIN_START have not yet occurred on any origin processes when the call
              to MPI_WIN_POST is made.  The nocheck option can be specified by a post call if and only if it  is
              specified by each matching start call.
       MPI_MODE_NOSTORE
              -  the  local  window  was  not updated by local stores (or local get or receive calls) since last
              synchronization. This may avoid the need for cache synchronization at the post call.
       MPI_MODE_NOPUT
              - the local window will not be updated by put or accumulate calls after the post call,  until  the
              ensuing  (wait)  synchronization.  This  may  avoid the need for cache synchronization at the wait
              call.

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the
       end of the argument list.  ierr is an integer and has the same meaning as the return value of the routine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of  the
       function  and Fortran routines in the last argument.  Before the value is returned, the current MPI error
       handler is called.  By default, this error handler aborts the MPI job.  The error handler may be  changed
       with    MPI_Comm_set_errhandler   (for   communicators),   MPI_File_set_errhandler   (for   files),   and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine MPI_Errhandler_set may be used but  its  use
       is  deprecated.   The  predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be
       returned.  Note that MPI does not guarentee that an MPI program can continue past an error; however,  MPI
       implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.

                                                   11/12/2016                                    MPI_Win_post(3)