MPI_Raccumulate

Accumulate data into the target process using remote memory access

Synopsis



int MPI_Raccumulate(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,
                    MPI_Request *request)




int MPI_Raccumulate_c(const void *origin_addr, MPI_Count origin_count,
                      MPI_Datatype origin_datatype, int target_rank,
                      MPI_Aint target_disp, MPI_Count target_count,
                      MPI_Datatype target_datatype, MPI_Op op, MPI_Win win,
                      MPI_Request *request)






Input Parameters




origin_addr  
 initial address of buffer (choice)


origin_count  
 number of entries in buffer (non-negative integer)


origin_datatype  
 datatype of each entry in origin buffer (handle)


target_rank  
 rank of target (non-negative integer)


target_disp  
 displacement from start of window to beginning of target buffer (non-negative integer)


target_count  
 number of entries in target buffer (non-negative integer)


target_datatype  
 datatype of each entry in target buffer (handle)


op  
 reduce operation (handle)


win  
 window object (handle)





Output Parameters




request  
 RMA request (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 guarantee 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_BUFFER  
 Invalid buffer pointer.  Usually a null buffer where
one is not valid.





MPI_ERR_COUNT  
 Invalid count argument.  Count arguments must be 
non-negative; a count of zero is often valid.





MPI_ERR_DISP  
 





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.  Additionally, this error can
occur if an uncommitted MPI_Datatype (see MPI_Type_commit) is used
in a communication call.





MPI_ERR_WIN  
 Invalid MPI window object





MPI_ERR_OTHER  
 Other error; use MPI_Error_string to get more information
about this error code. 





See Also

 MPI_Accumulate