DragonFly On-Line Manual Pages

Search: Section:  

MPI_Accumulate(3)                     MPI                    MPI_Accumulate(3)


NAME

       MPI_Accumulate -  Accumulate data into the target process using remote
       memory access


SYNOPSIS

       int MPI_Accumulate(MPICH2_CONST void *origin_addr, int origin_count, MPI_Datatype
                          origin_datatype, int target_rank, MPI_Aint
                          target_disp, int target_count, MPI_Datatype
                          target_datatype, MPI_Op op, MPI_Win win)


INPUT PARAMETERS

       origin_addr
              - initial address of buffer (choice)
       origin_count
              - number of entries in buffer (nonnegative integer)
       origin_datatype
              - datatype of each buffer entry (handle)
       target_rank
              - rank of target (nonnegative integer)
       target_disp
              - displacement from start of window to beginning of target
              buffer (nonnegative integer)
       target_count
              - number of entries in target buffer (nonnegative integer)
       target_datatype
              - datatype of each entry in target buffer (handle)
       op     - predefined reduce operation (handle)
       win    - window object (handle)


NOTES

       The basic components of both the origin and target datatype must be the
       same predefined datatype (e.g., all MPI_INT or all MPI_DOUBLE_PRECISION
       ).


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.
       MPI_ERR_ARG
              - Invalid argument.  Some argument is invalid and is not
              identified by a specific error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_COUNT
              - Invalid count argument.  Count arguments must be non-negative;
              a count of zero is often valid.
       MPI_ERR_RANK
              - Invalid source or destination rank.  Ranks must be between
              zero and the size of the communicator minus one; ranks in a
              receive ( MPI_Recv , MPI_Irecv , MPI_Sendrecv , etc.) may also
              be MPI_ANY_SOURCE .

       MPI_ERR_TYPE
              - Invalid datatype argument.  May be an uncommitted MPI_Datatype
              (see MPI_Type_commit ).
       MPI_ERR_WIN
              - Invalid MPI window object


LOCATION

       src/mpi/rma/accumulate.c

                                   9/20/2012                 MPI_Accumulate(3)

Search: Section: