[1682] | 1 | !> @file init_coupling.f90 |
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[2000] | 2 | !------------------------------------------------------------------------------! |
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[2696] | 3 | ! This file is part of the PALM model system. |
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[1036] | 4 | ! |
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[2000] | 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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[1036] | 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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[4360] | 17 | ! Copyright 1997-2020 Leibniz Universitaet Hannover |
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[2000] | 18 | !------------------------------------------------------------------------------! |
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[1036] | 19 | ! |
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[484] | 20 | ! Current revisions: |
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[206] | 21 | ! ----------------- |
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[2001] | 22 | ! |
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| 23 | ! |
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[1321] | 24 | ! Former revisions: |
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| 25 | ! ------------------ |
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| 26 | ! $Id: init_coupling.f90 4564 2020-06-12 14:03:36Z gronemeier $ |
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[4564] | 27 | ! Vertical nesting method of Huq et al. (2019) removed |
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| 28 | ! |
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| 29 | ! 4444 2020-03-05 15:59:50Z raasch |
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[4444] | 30 | ! bugfix: cpp-directives for serial mode added |
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| 31 | ! |
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| 32 | ! 4360 2020-01-07 11:25:50Z suehring |
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[4182] | 33 | ! Corrected "Former revisions" section |
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| 34 | ! |
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| 35 | ! 3655 2019-01-07 16:51:22Z knoop |
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[3232] | 36 | ! references to mrun replaced by palmrun, and updated |
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[2716] | 37 | ! |
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[4182] | 38 | ! 222 2009-01-12 16:04:16Z letzel |
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| 39 | ! Initial revision |
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| 40 | ! |
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[206] | 41 | ! Description: |
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| 42 | ! ------------ |
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[1682] | 43 | !> Initializing coupling via MPI-1 or MPI-2 if the coupled version of PALM is |
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| 44 | !> called. |
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[206] | 45 | !------------------------------------------------------------------------------! |
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[1682] | 46 | SUBROUTINE init_coupling |
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| 47 | |
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[206] | 48 | |
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[1320] | 49 | USE control_parameters, & |
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| 50 | ONLY: coupling_char, coupling_mode |
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| 51 | |
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| 52 | USE kinds |
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| 53 | |
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[206] | 54 | USE pegrid |
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| 55 | |
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| 56 | IMPLICIT NONE |
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| 57 | |
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| 58 | ! |
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| 59 | !-- Local variables |
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[4444] | 60 | #if defined( __parallel ) |
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[1682] | 61 | INTEGER(iwp) :: i !< |
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| 62 | INTEGER(iwp) :: inter_color !< |
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[4444] | 63 | #endif |
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[1320] | 64 | |
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[1682] | 65 | INTEGER(iwp), DIMENSION(:) :: bc_data(0:3) = 0 !< |
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[206] | 66 | |
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| 67 | ! |
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| 68 | !-- Get information about the coupling mode from the environment variable |
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| 69 | !-- which has been set by the mpiexec command. |
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| 70 | !-- This method is currently not used because the mpiexec command is not |
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| 71 | !-- available on some machines |
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[1808] | 72 | ! CALL GET_ENVIRONMENT_VARIABLE( 'coupling_mode', coupling_mode, i ) |
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[206] | 73 | ! IF ( i == 0 ) coupling_mode = 'uncoupled' |
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| 74 | ! IF ( coupling_mode == 'ocean_to_atmosphere' ) coupling_char = '_O' |
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| 75 | |
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| 76 | ! |
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| 77 | !-- Get information about the coupling mode from standard input (PE0 only) and |
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[2298] | 78 | !-- distribute it to the other PEs. Distribute PEs to 2 new communicators. |
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[206] | 79 | !-- ATTENTION: numprocs will be reset according to the new communicators |
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[222] | 80 | #if defined ( __parallel ) |
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[667] | 81 | |
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[206] | 82 | IF ( myid == 0 ) THEN |
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| 83 | READ (*,*,ERR=10,END=10) coupling_mode, bc_data(1), bc_data(2) |
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| 84 | 10 CONTINUE |
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| 85 | IF ( TRIM( coupling_mode ) == 'coupled_run' ) THEN |
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| 86 | i = 1 |
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| 87 | ELSE |
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| 88 | i = 0 |
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| 89 | ENDIF |
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[291] | 90 | bc_data(0) = i |
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| 91 | |
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| 92 | ! |
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| 93 | !-- Check if '_O' has to be used as file extension in an uncoupled ocean |
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| 94 | !-- run. This is required, if this run shall be continued as a coupled run. |
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| 95 | IF ( TRIM( coupling_mode ) == 'precursor_ocean' ) bc_data(3) = 1 |
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| 96 | |
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[206] | 97 | ENDIF |
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| 98 | |
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[291] | 99 | CALL MPI_BCAST( bc_data(0), 4, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr ) |
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[206] | 100 | i = bc_data(0) |
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| 101 | |
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[2365] | 102 | IF ( i == 0 ) THEN |
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[206] | 103 | coupling_mode = 'uncoupled' |
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[691] | 104 | ! |
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| 105 | !-- In case of a precursor ocean run, an additional flag file is created. |
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| 106 | !-- This is necessary for data_output_2d_on_each_pe = .T. |
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| 107 | IF ( bc_data(3) == 1 ) THEN |
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| 108 | OPEN( 90, FILE='PRECURSOR_OCEAN', FORM='FORMATTED' ) |
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| 109 | WRITE ( 90, '(''TRUE'')' ) |
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| 110 | CLOSE ( 90 ) |
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| 111 | ENDIF |
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[206] | 112 | ELSE |
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| 113 | comm_inter = MPI_COMM_WORLD |
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| 114 | |
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| 115 | IF ( myid < bc_data(1) ) THEN |
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[667] | 116 | inter_color = 0 |
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| 117 | numprocs = bc_data(1) |
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| 118 | coupling_mode = 'atmosphere_to_ocean' |
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[206] | 119 | ELSE |
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[667] | 120 | inter_color = 1 |
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| 121 | numprocs = bc_data(2) |
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| 122 | coupling_mode = 'ocean_to_atmosphere' |
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[206] | 123 | ENDIF |
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[667] | 124 | |
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[206] | 125 | CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, inter_color, 0, comm_palm, ierr ) |
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| 126 | comm2d = comm_palm |
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| 127 | |
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| 128 | ! |
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| 129 | !-- Write a flag file for the ocean model and the other atmosphere |
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| 130 | !-- processes. |
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| 131 | OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' ) |
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| 132 | WRITE ( 90, '(''TRUE'')' ) |
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| 133 | CLOSE ( 90 ) |
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| 134 | ENDIF |
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| 135 | #endif |
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| 136 | |
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[291] | 137 | ! |
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| 138 | !-- In case of a precursor ocean run (followed by a coupled run), or a |
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| 139 | !-- coupled atmosphere-ocean run, set the file extension for the ocean files |
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| 140 | IF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' .OR. bc_data(3) == 1 ) & |
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| 141 | THEN |
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| 142 | coupling_char = '_O' |
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| 143 | ENDIF |
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[206] | 144 | |
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| 145 | END SUBROUTINE init_coupling |
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