[206] | 1 | SUBROUTINE init_coupling |
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| 2 | |
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[1036] | 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later version. |
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| 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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[1310] | 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[484] | 20 | ! Current revisions: |
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[206] | 21 | ! ----------------- |
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[1320] | 22 | ! ONLY-attribute added to USE-statements, |
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| 23 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 24 | ! kinds are defined in new module kinds, |
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| 25 | ! old module precision_kind is removed, |
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| 26 | ! revision history before 2012 removed, |
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| 27 | ! comment fields (!:) to be used for variable explanations added to |
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| 28 | ! all variable declaration statements |
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[206] | 29 | ! |
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| 30 | ! Former revisions: |
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| 31 | ! ------------------ |
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| 32 | ! $Id: init_coupling.f90 1320 2014-03-20 08:40:49Z raasch $ |
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| 33 | ! |
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[1037] | 34 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 35 | ! code put under GPL (PALM 3.9) |
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| 36 | ! |
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[226] | 37 | ! 222 2009-01-12 16:04:16Z letzel |
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| 38 | ! Initial revision |
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| 39 | ! |
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[206] | 40 | ! Description: |
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| 41 | ! ------------ |
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| 42 | ! Initializing coupling via MPI-1 or MPI-2 if the coupled version of PALM is |
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| 43 | ! called. |
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| 44 | !------------------------------------------------------------------------------! |
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| 45 | |
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[1320] | 46 | USE control_parameters, & |
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| 47 | ONLY: coupling_char, coupling_mode |
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| 48 | |
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| 49 | USE kinds |
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| 50 | |
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[206] | 51 | USE pegrid |
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| 52 | |
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| 53 | IMPLICIT NONE |
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| 54 | |
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| 55 | ! |
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| 56 | !-- Local variables |
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[1320] | 57 | INTEGER(iwp) :: i !: |
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| 58 | INTEGER(iwp) :: inter_color !: |
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| 59 | |
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| 60 | INTEGER(iwp), DIMENSION(:) :: bc_data(0:3) = 0 !: |
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[206] | 61 | |
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| 62 | ! |
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| 63 | !-- Get information about the coupling mode from the environment variable |
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| 64 | !-- which has been set by the mpiexec command. |
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| 65 | !-- This method is currently not used because the mpiexec command is not |
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| 66 | !-- available on some machines |
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| 67 | ! CALL local_getenv( 'coupling_mode', 13, coupling_mode, i ) |
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| 68 | ! IF ( i == 0 ) coupling_mode = 'uncoupled' |
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| 69 | ! IF ( coupling_mode == 'ocean_to_atmosphere' ) coupling_char = '_O' |
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| 70 | |
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| 71 | ! |
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| 72 | !-- Get information about the coupling mode from standard input (PE0 only) and |
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| 73 | !-- distribute it to the other PEs. If __mpi2 was defined, suggest a |
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| 74 | !-- coupling via MPI-2. Otherwise initate a coupling using MPI-1 only. |
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| 75 | !-- In this case, distribute PEs to 2 new communicators. |
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| 76 | !-- ATTENTION: numprocs will be reset according to the new communicators |
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[222] | 77 | #if defined ( __parallel ) |
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[667] | 78 | |
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| 79 | !myid_absolut = myid |
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[206] | 80 | IF ( myid == 0 ) THEN |
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| 81 | READ (*,*,ERR=10,END=10) coupling_mode, bc_data(1), bc_data(2) |
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| 82 | 10 CONTINUE |
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| 83 | #if defined( __mpi2 ) |
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| 84 | IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN |
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| 85 | i = 1 |
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| 86 | ELSEIF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' ) THEN |
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| 87 | i = 2 |
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| 88 | ELSE |
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| 89 | i = 0 |
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| 90 | ENDIF |
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| 91 | #else |
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| 92 | IF ( TRIM( coupling_mode ) == 'coupled_run' ) THEN |
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| 93 | i = 1 |
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| 94 | ELSE |
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| 95 | i = 0 |
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| 96 | ENDIF |
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| 97 | #endif |
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[291] | 98 | bc_data(0) = i |
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| 99 | |
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| 100 | ! |
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| 101 | !-- Check if '_O' has to be used as file extension in an uncoupled ocean |
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| 102 | !-- run. This is required, if this run shall be continued as a coupled run. |
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| 103 | IF ( TRIM( coupling_mode ) == 'precursor_ocean' ) bc_data(3) = 1 |
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| 104 | |
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[206] | 105 | ENDIF |
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| 106 | |
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[291] | 107 | CALL MPI_BCAST( bc_data(0), 4, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr ) |
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[206] | 108 | i = bc_data(0) |
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| 109 | |
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| 110 | #if defined ( __mpi2 ) |
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| 111 | IF ( i == 0 ) THEN |
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| 112 | coupling_mode = 'uncoupled' |
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| 113 | ELSEIF ( i == 1 ) THEN |
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| 114 | coupling_mode = 'atmosphere_to_ocean' |
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| 115 | ELSEIF ( i == 2 ) THEN |
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| 116 | coupling_mode = 'ocean_to_atmosphere' |
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| 117 | ENDIF |
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| 118 | target_id = myid |
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| 119 | #else |
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| 120 | IF ( i == 0 ) THEN |
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| 121 | coupling_mode = 'uncoupled' |
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[691] | 122 | ! |
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| 123 | !-- In case of a precursor ocean run, an additional flag file is created. |
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| 124 | !-- This is necessary for data_output_2d_on_each_pe = .T. |
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| 125 | IF ( bc_data(3) == 1 ) THEN |
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| 126 | OPEN( 90, FILE='PRECURSOR_OCEAN', FORM='FORMATTED' ) |
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| 127 | WRITE ( 90, '(''TRUE'')' ) |
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| 128 | CLOSE ( 90 ) |
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| 129 | ENDIF |
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[206] | 130 | ELSE |
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| 131 | comm_inter = MPI_COMM_WORLD |
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| 132 | |
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| 133 | IF ( myid < bc_data(1) ) THEN |
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[667] | 134 | inter_color = 0 |
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| 135 | numprocs = bc_data(1) |
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| 136 | coupling_mode = 'atmosphere_to_ocean' |
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[206] | 137 | ELSE |
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[667] | 138 | inter_color = 1 |
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| 139 | numprocs = bc_data(2) |
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| 140 | coupling_mode = 'ocean_to_atmosphere' |
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[206] | 141 | ENDIF |
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[667] | 142 | |
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[206] | 143 | CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, inter_color, 0, comm_palm, ierr ) |
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| 144 | comm2d = comm_palm |
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| 145 | |
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| 146 | ! |
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| 147 | !-- Write a flag file for the ocean model and the other atmosphere |
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| 148 | !-- processes. |
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| 149 | OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' ) |
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| 150 | WRITE ( 90, '(''TRUE'')' ) |
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| 151 | CLOSE ( 90 ) |
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| 152 | ENDIF |
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| 153 | #endif |
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[222] | 154 | #endif |
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[206] | 155 | |
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[291] | 156 | ! |
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| 157 | !-- In case of a precursor ocean run (followed by a coupled run), or a |
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| 158 | !-- coupled atmosphere-ocean run, set the file extension for the ocean files |
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| 159 | IF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' .OR. bc_data(3) == 1 ) & |
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| 160 | THEN |
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| 161 | coupling_char = '_O' |
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| 162 | ENDIF |
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[206] | 163 | |
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| 164 | END SUBROUTINE init_coupling |
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