comms_scatterv_real_1 Subroutine

  1. comms.F90
  2. w90_comms
  3. comms_scatterv_real_1

private subroutine comms_scatterv_real_1(array, localcount, rootglobalarray, counts, displs)

Scatter real data from root node (array of rank 1)

Arguments

Type IntentOptional AttributesName
real(kind=dp), intent(inout), dimension(:):: array

local array for getting data
integer, intent(in) :: localcount

localcount elements will be fetched from the root node
real(kind=dp), intent(inout), dimension(:):: rootglobalarray

array on the root node from which data will be sent
integer, intent(in), dimension(num_nodes):: counts

how data should be partitioned, see MPI documentation or function comms_array_split
integer, intent(in), dimension(num_nodes):: displs

Calls

proc~~comms_scatterv_real_1~~CallsGraph proc~comms_scatterv_real_1 comms_scatterv_real_1 dcopy dcopy proc~comms_scatterv_real_1->dcopy

Called by

proc~~comms_scatterv_real_1~~CalledByGraph proc~comms_scatterv_real_1 comms_scatterv_real_1 interface~comms_scatterv comms_scatterv interface~comms_scatterv->proc~comms_scatterv_real_1 proc~k_path k_path proc~k_path->interface~comms_scatterv

Contents

Source Code

comms_scatterv_real_1

Source Code

  subroutine comms_scatterv_real_1(array, localcount, rootglobalarray, counts, displs)
    !! Scatter real data from root node (array of rank 1)
    implicit none

    real(kind=dp), dimension(:), intent(inout) :: array
    !! local array for getting data
    integer, intent(in)                        :: localcount
    !! localcount elements will be fetched from the root node
    real(kind=dp), dimension(:), intent(inout) :: rootglobalarray
    !! array on the root node from which data will be sent
    integer, dimension(num_nodes), intent(in)  :: counts
    !! how data should be partitioned, see MPI documentation or function comms_array_split
    integer, dimension(num_nodes), intent(in)  :: displs

#ifdef MPI
    integer :: error

    call MPI_scatterv(rootglobalarray, counts, displs, MPI_double_precision, &
                      array, localcount, MPI_double_precision, root_id, mpi_comm_world, error)

    if (error .ne. MPI_success) then
      call io_error('Error in comms_scatterv_real_1')
    end if

#else
    call dcopy(localcount, rootglobalarray, 1, array, 1)
#endif

    return

  end subroutine comms_scatterv_real_1