[1682] | 1 | !> @file init_coupling.f90 |
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[1036] | 2 | !--------------------------------------------------------------------------------! |
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| 3 | ! This file is part of PALM. |
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| 4 | ! |
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| 5 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 6 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 7 | ! either version 3 of the License, or (at your option) any later version. |
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| 8 | ! |
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| 9 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 10 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 11 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 12 | ! |
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| 13 | ! You should have received a copy of the GNU General Public License along with |
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| 14 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 15 | ! |
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[1310] | 16 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 17 | !--------------------------------------------------------------------------------! |
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| 18 | ! |
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[484] | 19 | ! Current revisions: |
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[206] | 20 | ! ----------------- |
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[1682] | 21 | ! Code annotations made doxygen readable |
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[1321] | 22 | ! |
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| 23 | ! Former revisions: |
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| 24 | ! ------------------ |
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| 25 | ! $Id: init_coupling.f90 1682 2015-10-07 23:56:08Z knoop $ |
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| 26 | ! |
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| 27 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 28 | ! ONLY-attribute added to USE-statements, |
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| 29 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 30 | ! kinds are defined in new module kinds, |
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| 31 | ! revision history before 2012 removed, |
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| 32 | ! comment fields (!:) to be used for variable explanations added to |
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| 33 | ! all variable declaration statements |
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[206] | 34 | ! |
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[1037] | 35 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 36 | ! code put under GPL (PALM 3.9) |
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| 37 | ! |
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[226] | 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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[1682] | 60 | INTEGER(iwp) :: i !< |
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| 61 | INTEGER(iwp) :: inter_color !< |
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[1320] | 62 | |
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[1682] | 63 | INTEGER(iwp), DIMENSION(:) :: bc_data(0:3) = 0 !< |
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[206] | 64 | |
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| 65 | ! |
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| 66 | !-- Get information about the coupling mode from the environment variable |
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| 67 | !-- which has been set by the mpiexec command. |
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| 68 | !-- This method is currently not used because the mpiexec command is not |
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| 69 | !-- available on some machines |
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| 70 | ! CALL local_getenv( 'coupling_mode', 13, coupling_mode, i ) |
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| 71 | ! IF ( i == 0 ) coupling_mode = 'uncoupled' |
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| 72 | ! IF ( coupling_mode == 'ocean_to_atmosphere' ) coupling_char = '_O' |
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| 73 | |
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| 74 | ! |
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| 75 | !-- Get information about the coupling mode from standard input (PE0 only) and |
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| 76 | !-- distribute it to the other PEs. If __mpi2 was defined, suggest a |
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| 77 | !-- coupling via MPI-2. Otherwise initate a coupling using MPI-1 only. |
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| 78 | !-- In this case, distribute PEs to 2 new communicators. |
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| 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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| 82 | !myid_absolut = myid |
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[206] | 83 | IF ( myid == 0 ) THEN |
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| 84 | READ (*,*,ERR=10,END=10) coupling_mode, bc_data(1), bc_data(2) |
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| 85 | 10 CONTINUE |
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| 86 | #if defined( __mpi2 ) |
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| 87 | IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN |
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| 88 | i = 1 |
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| 89 | ELSEIF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' ) THEN |
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| 90 | i = 2 |
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| 91 | ELSE |
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| 92 | i = 0 |
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| 93 | ENDIF |
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| 94 | #else |
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| 95 | IF ( TRIM( coupling_mode ) == 'coupled_run' ) THEN |
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| 96 | i = 1 |
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| 97 | ELSE |
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| 98 | i = 0 |
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| 99 | ENDIF |
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| 100 | #endif |
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[291] | 101 | bc_data(0) = i |
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| 102 | |
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| 103 | ! |
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| 104 | !-- Check if '_O' has to be used as file extension in an uncoupled ocean |
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| 105 | !-- run. This is required, if this run shall be continued as a coupled run. |
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| 106 | IF ( TRIM( coupling_mode ) == 'precursor_ocean' ) bc_data(3) = 1 |
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| 107 | |
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[206] | 108 | ENDIF |
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| 109 | |
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[291] | 110 | CALL MPI_BCAST( bc_data(0), 4, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr ) |
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[206] | 111 | i = bc_data(0) |
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| 112 | |
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| 113 | #if defined ( __mpi2 ) |
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| 114 | IF ( i == 0 ) THEN |
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| 115 | coupling_mode = 'uncoupled' |
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| 116 | ELSEIF ( i == 1 ) THEN |
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| 117 | coupling_mode = 'atmosphere_to_ocean' |
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| 118 | ELSEIF ( i == 2 ) THEN |
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| 119 | coupling_mode = 'ocean_to_atmosphere' |
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| 120 | ENDIF |
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| 121 | target_id = myid |
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| 122 | #else |
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| 123 | IF ( i == 0 ) THEN |
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| 124 | coupling_mode = 'uncoupled' |
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[691] | 125 | ! |
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| 126 | !-- In case of a precursor ocean run, an additional flag file is created. |
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| 127 | !-- This is necessary for data_output_2d_on_each_pe = .T. |
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| 128 | IF ( bc_data(3) == 1 ) THEN |
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| 129 | OPEN( 90, FILE='PRECURSOR_OCEAN', FORM='FORMATTED' ) |
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| 130 | WRITE ( 90, '(''TRUE'')' ) |
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| 131 | CLOSE ( 90 ) |
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| 132 | ENDIF |
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[206] | 133 | ELSE |
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| 134 | comm_inter = MPI_COMM_WORLD |
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| 135 | |
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| 136 | IF ( myid < bc_data(1) ) THEN |
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[667] | 137 | inter_color = 0 |
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| 138 | numprocs = bc_data(1) |
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| 139 | coupling_mode = 'atmosphere_to_ocean' |
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[206] | 140 | ELSE |
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[667] | 141 | inter_color = 1 |
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| 142 | numprocs = bc_data(2) |
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| 143 | coupling_mode = 'ocean_to_atmosphere' |
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[206] | 144 | ENDIF |
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[667] | 145 | |
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[206] | 146 | CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, inter_color, 0, comm_palm, ierr ) |
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| 147 | comm2d = comm_palm |
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| 148 | |
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| 149 | ! |
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| 150 | !-- Write a flag file for the ocean model and the other atmosphere |
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| 151 | !-- processes. |
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| 152 | OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' ) |
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| 153 | WRITE ( 90, '(''TRUE'')' ) |
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| 154 | CLOSE ( 90 ) |
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| 155 | ENDIF |
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| 156 | #endif |
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[222] | 157 | #endif |
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[206] | 158 | |
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[291] | 159 | ! |
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| 160 | !-- In case of a precursor ocean run (followed by a coupled run), or a |
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| 161 | !-- coupled atmosphere-ocean run, set the file extension for the ocean files |
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| 162 | IF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' .OR. bc_data(3) == 1 ) & |
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| 163 | THEN |
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| 164 | coupling_char = '_O' |
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| 165 | ENDIF |
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[206] | 166 | |
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| 167 | END SUBROUTINE init_coupling |
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