[206] | 1 | SUBROUTINE init_coupling |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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[484] | 4 | ! Current revisions: |
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[206] | 5 | ! ----------------- |
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[691] | 6 | ! Bugfix: combine_plot_fields did not work with data_output_2d_on_each_pe = .T. |
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| 7 | ! for precursor ocean runs |
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[206] | 8 | ! |
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| 9 | ! Former revisions: |
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| 10 | ! ------------------ |
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| 11 | ! $Id: init_coupling.f90 691 2011-03-04 08:45:30Z maronga $ |
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| 12 | ! |
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[668] | 13 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 14 | ! determination of target_id's moved to init_pegrid |
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| 15 | ! |
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[392] | 16 | ! 291 2009-04-16 12:07:26Z raasch |
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| 17 | ! Coupling with independent precursor runs. |
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| 18 | ! |
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[226] | 19 | ! 222 2009-01-12 16:04:16Z letzel |
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| 20 | ! Initial revision |
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| 21 | ! |
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[206] | 22 | ! Description: |
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| 23 | ! ------------ |
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| 24 | ! Initializing coupling via MPI-1 or MPI-2 if the coupled version of PALM is |
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| 25 | ! called. |
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| 26 | !------------------------------------------------------------------------------! |
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| 27 | |
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| 28 | USE pegrid |
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| 29 | USE control_parameters |
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[667] | 30 | USE indices |
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[206] | 31 | |
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| 32 | IMPLICIT NONE |
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| 33 | |
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| 34 | ! |
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| 35 | !-- Local variables |
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| 36 | INTEGER :: i, inter_color |
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[291] | 37 | INTEGER, DIMENSION(:) :: bc_data(0:3) = 0 |
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[206] | 38 | |
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| 39 | ! |
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| 40 | !-- Get information about the coupling mode from the environment variable |
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| 41 | !-- which has been set by the mpiexec command. |
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| 42 | !-- This method is currently not used because the mpiexec command is not |
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| 43 | !-- available on some machines |
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| 44 | ! CALL local_getenv( 'coupling_mode', 13, coupling_mode, i ) |
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| 45 | ! IF ( i == 0 ) coupling_mode = 'uncoupled' |
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| 46 | ! IF ( coupling_mode == 'ocean_to_atmosphere' ) coupling_char = '_O' |
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| 47 | |
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| 48 | ! |
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| 49 | !-- Get information about the coupling mode from standard input (PE0 only) and |
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| 50 | !-- distribute it to the other PEs. If __mpi2 was defined, suggest a |
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| 51 | !-- coupling via MPI-2. Otherwise initate a coupling using MPI-1 only. |
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| 52 | !-- In this case, distribute PEs to 2 new communicators. |
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| 53 | !-- ATTENTION: numprocs will be reset according to the new communicators |
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[222] | 54 | #if defined ( __parallel ) |
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[667] | 55 | |
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| 56 | !myid_absolut = myid |
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[206] | 57 | IF ( myid == 0 ) THEN |
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| 58 | READ (*,*,ERR=10,END=10) coupling_mode, bc_data(1), bc_data(2) |
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| 59 | 10 CONTINUE |
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| 60 | #if defined( __mpi2 ) |
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| 61 | IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN |
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| 62 | i = 1 |
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| 63 | ELSEIF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' ) THEN |
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| 64 | i = 2 |
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| 65 | ELSE |
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| 66 | i = 0 |
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| 67 | ENDIF |
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| 68 | #else |
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| 69 | IF ( TRIM( coupling_mode ) == 'coupled_run' ) THEN |
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| 70 | i = 1 |
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| 71 | ELSE |
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| 72 | i = 0 |
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| 73 | ENDIF |
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| 74 | #endif |
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[291] | 75 | bc_data(0) = i |
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| 76 | |
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| 77 | ! |
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| 78 | !-- Check if '_O' has to be used as file extension in an uncoupled ocean |
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| 79 | !-- run. This is required, if this run shall be continued as a coupled run. |
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| 80 | IF ( TRIM( coupling_mode ) == 'precursor_ocean' ) bc_data(3) = 1 |
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| 81 | |
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[206] | 82 | ENDIF |
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| 83 | |
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[291] | 84 | CALL MPI_BCAST( bc_data(0), 4, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr ) |
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[206] | 85 | i = bc_data(0) |
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| 86 | |
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| 87 | #if defined ( __mpi2 ) |
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| 88 | IF ( i == 0 ) THEN |
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| 89 | coupling_mode = 'uncoupled' |
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| 90 | ELSEIF ( i == 1 ) THEN |
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| 91 | coupling_mode = 'atmosphere_to_ocean' |
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| 92 | ELSEIF ( i == 2 ) THEN |
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| 93 | coupling_mode = 'ocean_to_atmosphere' |
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| 94 | ENDIF |
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| 95 | target_id = myid |
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| 96 | #else |
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| 97 | IF ( i == 0 ) THEN |
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| 98 | coupling_mode = 'uncoupled' |
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[691] | 99 | ! |
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| 100 | !-- In case of a precursor ocean run, an additional flag file is created. |
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| 101 | !-- This is necessary for data_output_2d_on_each_pe = .T. |
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| 102 | IF ( bc_data(3) == 1 ) THEN |
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| 103 | OPEN( 90, FILE='PRECURSOR_OCEAN', FORM='FORMATTED' ) |
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| 104 | WRITE ( 90, '(''TRUE'')' ) |
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| 105 | CLOSE ( 90 ) |
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| 106 | ENDIF |
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[206] | 107 | ELSE |
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| 108 | comm_inter = MPI_COMM_WORLD |
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| 109 | |
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| 110 | IF ( myid < bc_data(1) ) THEN |
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[667] | 111 | inter_color = 0 |
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| 112 | numprocs = bc_data(1) |
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| 113 | coupling_mode = 'atmosphere_to_ocean' |
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[206] | 114 | ELSE |
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[667] | 115 | inter_color = 1 |
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| 116 | numprocs = bc_data(2) |
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| 117 | coupling_mode = 'ocean_to_atmosphere' |
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[206] | 118 | ENDIF |
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[667] | 119 | |
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[206] | 120 | CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, inter_color, 0, comm_palm, ierr ) |
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| 121 | comm2d = comm_palm |
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| 122 | |
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| 123 | ! |
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| 124 | !-- Write a flag file for the ocean model and the other atmosphere |
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| 125 | !-- processes. |
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| 126 | OPEN( 90, FILE='COUPLING_PORT_OPENED', 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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| 130 | #endif |
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[222] | 131 | #endif |
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[206] | 132 | |
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[291] | 133 | ! |
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| 134 | !-- In case of a precursor ocean run (followed by a coupled run), or a |
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| 135 | !-- coupled atmosphere-ocean run, set the file extension for the ocean files |
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| 136 | IF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' .OR. bc_data(3) == 1 ) & |
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| 137 | THEN |
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| 138 | coupling_char = '_O' |
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| 139 | ENDIF |
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[206] | 140 | |
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| 141 | END SUBROUTINE init_coupling |
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