Newer
Older
MODULE mpp_map
!!======================================================================
!! *** MODULE mpp_mpa ***
!! NEMOVAR: MPP global grid point mapping to processors
!!======================================================================
!! History : 2.0 ! 2007-08 (K. Mogensen) Original code
!!----------------------------------------------------------------------
!!----------------------------------------------------------------------
!! mppmap_init : Initialize mppmap.
!!----------------------------------------------------------------------
USE par_kind, ONLY : wp ! Precision variables
USE par_oce , ONLY : jpi, jpj, Nis0, Nie0, Njs0, Nje0, nn_hls ! Ocean parameters
USE dom_oce , ONLY : mig, mjg, narea ! Ocean space and time domain variables
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
#if ! defined key_mpi_off
USE lib_mpp , ONLY : mpi_comm_oce ! MPP library
#endif
USE in_out_manager ! I/O manager
IMPLICIT NONE
PRIVATE
PUBLIC :: mppmap_init, mppmap !: ???
INTEGER, DIMENSION(:,:), ALLOCATABLE :: mppmap ! ???
!!----------------------------------------------------------------------
!! NEMO/OCE 4.0 , NEMO Consortium (2018)
!! $Id: mpp_map.F90 14229 2020-12-20 12:45:55Z smasson $
!! Software governed by the CeCILL license (see ./LICENSE)
!!----------------------------------------------------------------------
CONTAINS
SUBROUTINE mppmap_init
!!----------------------------------------------------------------------
!! *** ROUTINE mppmap_init ***
!!
!! ** Purpose : Setup a global map of processor rank for all gridpoints
!!
!! ** Method : MPI all reduce.
!!
!! ** Action : This does only work for MPI.
!!
!! References : http://www.mpi-forum.org
!!----------------------------------------------------------------------
INTEGER, DIMENSION(:,:), ALLOCATABLE :: imppmap !
#if ! defined key_mpi_off
INTEGER :: ierr
INCLUDE 'mpif.h'
#endif
!!----------------------------------------------------------------------
IF (.NOT. ALLOCATED(mppmap)) THEN
ALLOCATE( &
& mppmap(jpiglo,jpjglo) &
& )
ENDIF
! Initialize local imppmap
ALLOCATE( &
& imppmap(jpiglo,jpjglo) &
& )
imppmap(:,:) = 0
! ! Setup local grid points
imppmap(mig(1,nn_hls):mig(jpi,nn_hls),mjg(1,nn_hls):mjg(jpj,nn_hls)) = narea
! Get global data
#if ! defined key_mpi_off
! Call the MPI library to find the max across processors
CALL mpi_allreduce( imppmap, mppmap, jpiglo*jpjglo, mpi_integer, &
& mpi_max, mpi_comm_oce, ierr )
#else
! No MPP: Just copy the data
mppmap(:,:) = imppmap(:,:)
#endif
!
END SUBROUTINE mppmap_init
!!======================================================================
END MODULE mpp_map