Scatters data from one processes to all others
MPI mapping mpi_scatter
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=real_4), | intent(in), | CONTIGUOUS | :: | msg_scatter(:,:) |
Data to scatter (for root process) |
|
real(kind=real_4), | intent(inout), | CONTIGUOUS | :: | msg(:) | ||
integer, | intent(in) | :: | root |
Process which scatters data Message passing environment identifier |
||
integer, | intent(in) | :: | gid |
Process which scatters data Message passing environment identifier |
||
integer, | intent(inout) | :: | request |
SUBROUTINE mp_iscatter_rv2(msg_scatter, msg, root, gid, request)
!! Scatters data from one processes to all others
!!
!! MPI mapping
!! mpi_scatter
REAL(kind=real_4), CONTIGUOUS, INTENT(IN) :: msg_scatter(:, :)
!! Data to scatter (for root process)
REAL(kind=real_4), CONTIGUOUS, INTENT(INOUT) :: msg(:)
INTEGER, INTENT(IN) :: root, gid
!! Process which scatters data
!! Message passing environment identifier
INTEGER, INTENT(INOUT) :: request
CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_iscatter_rv2'
INTEGER :: handle, ierr, msglen
ierr = 0
CALL timeset(routineN, handle)
msglen = SIZE(msg)
#if defined(__parallel)
CALL mpi_iscatter(msg_scatter, msglen, MPI_REAL, msg, &
msglen, MPI_REAL, root, gid, request, ierr)
IF (ierr /= 0) CALL mp_stop(ierr, "mpi_iscatter @ "//routineN)
CALL add_perf(perf_id=24, msg_size=1*real_4_size)
#else
MARK_USED(root)
MARK_USED(gid)
msg(:) = msg_scatter(:, 1)
request = mp_request_null
#endif
CALL timestop(handle)
END SUBROUTINE mp_iscatter_rv2