data_streamer_simcomp.f90

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module data_streamer_simcomp
  use num_types, only : rp
  use json_module, only : json_file
  use json_utils, only : json_get_or_default, json_get, &
       json_get_or_lookup_or_default
  use simulation_component, only : simulation_component_t
  use field, only : field_t
  use case, only : case_t
  use time_state, only : time_state_t
  use data_streamer, only : data_streamer_t
  use logger, only : neko_log, neko_log_debug
  use time_based_controller, only : time_based_controller_t
  use registry, only : neko_registry
  use device
  implicit none
  private
 
  type, public, extends(simulation_component_t) :: data_streamer_simcomp_t
 
     character(len=20), allocatable :: field_names(:)
 
     real(kind=rp) :: start_time
 
     type(data_streamer_t) :: dstream
 
   contains
     procedure, pass(this) :: init => data_streamer_simcomp_init_from_json
     procedure, pass(this) :: init_from_components => &
          data_streamer_simcomp_init_from_components
     procedure, pass(this) :: free => data_streamer_simcomp_free
     procedure, pass(this) :: compute_ => data_streamer_simcomp_compute
  end type data_streamer_simcomp_t
 
contains
 
  subroutine data_streamer_simcomp_init_from_json(this, json, case)
    class(data_streamer_simcomp_t), intent(inout), target :: this
    type(json_file), intent(inout) :: json
    class(case_t), intent(inout), target :: case
    character(len=20), allocatable :: which_fields(:)
    character(len=:), allocatable :: name
    real(kind=rp) :: start_time
    logical :: stream_mesh
 
    call json_get_or_default(json, "name", name, "data_streamer_simcomp")
    call json_get(json, 'fields', which_fields)
 
    call json_get_or_lookup_or_default(json, 'start_time', start_time, &
         -1.0_rp)
 
    call json_get_or_default(json, 'stream_mesh', stream_mesh, .false.)
 
    call this%init_base(json, case)
    call this%init_from_components(name, which_fields, start_time, stream_mesh)
 
  end subroutine data_streamer_simcomp_init_from_json
 
  subroutine data_streamer_simcomp_init_from_components(this, name, &
       which_fields, start_time, stream_mesh)
    class(data_streamer_simcomp_t), intent(inout) :: this
    character(len=*), intent(in) :: name
    character(len=20), intent(in) :: which_fields(:)
    real(kind=rp), intent(in) :: start_time
    logical, intent(in) :: stream_mesh
    type(field_t), pointer :: f
 
    this%name = name
    this%field_names = which_fields
    this%start_time = start_time
 
    call this%dstream%init(this%case%fluid%c_Xh)
 
    if (stream_mesh) then
       ! Stream the mesh coordinates of the first field in which_fields. We
       ! assume that all fields share the same mesh. We don't use the dofmap
       ! in case%fluid in case the fields we are streaming are masked.
       f => neko_registry%get_field_by_name(which_fields(1))
       call neko_log%message("Using field " // trim(f%name) // &
            " for streaming mesh", lvl = neko_log_debug)
       call neko_log%message("Streaming mesh: x-coordinates", &
            lvl = neko_log_debug)
       call this%dstream%stream(f%dof%x)
       call neko_log%message("Streaming mesh: y-coordinates", &
            lvl = neko_log_debug)
       call this%dstream%stream(f%dof%y)
       call neko_log%message("Streaming mesh: z-coordinates", &
            lvl = neko_log_debug)
       call this%dstream%stream(f%dof%z)
    end if
 
  end subroutine data_streamer_simcomp_init_from_components
 
  subroutine data_streamer_simcomp_free(this)
    class(data_streamer_simcomp_t), intent(inout) :: this
    call this%free_base()
 
    if (allocated(this%field_names)) deallocate(this%field_names)
    this%start_time = -1.0_rp
    call this%dstream%free()
 
  end subroutine data_streamer_simcomp_free
 
  subroutine data_streamer_simcomp_compute(this, time)
    class(data_streamer_simcomp_t), intent(inout) :: this
    type(time_state_t), intent(in) :: time
 
    integer :: i
    type(field_t), pointer :: f
 
    if (time%t .ge. this%start_time) then
       do i = 1, size(this%field_names)
 
          ! Sync from GPU to CPU
          f => neko_registry%get_field_by_name(this%field_names(i))
          call f%copy_from(device_to_host, .true.)
 
          call neko_log%message("Streaming field: " // this%field_names(i))
 
          ! Stream the field
          call this%dstream%stream(f%x)
       end do
    end if
 
  end subroutine data_streamer_simcomp_compute
 
end module data_streamer_simcomp