1 | SUBROUTINE init_coupling |
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2 | |
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3 | !------------------------------------------------------------------------------! |
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4 | ! Current revisions: |
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5 | ! ----------------- |
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6 | ! |
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7 | ! |
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8 | ! Former revisions: |
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9 | ! ------------------ |
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10 | ! $Id: init_coupling.f90 710 2011-03-30 09:45:27Z raasch $ |
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11 | ! |
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12 | ! 709 2011-03-30 09:31:40Z raasch |
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13 | ! formatting adjustments |
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14 | ! |
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15 | ! 691 2011-03-04 08:45:30Z maronga |
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16 | ! Bugfix: combine_plot_fields did not work with data_output_2d_on_each_pe = .T. |
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17 | ! for precursor ocean runs |
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18 | ! |
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19 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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20 | ! determination of target_id's moved to init_pegrid |
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21 | ! |
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22 | ! 291 2009-04-16 12:07:26Z raasch |
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23 | ! Coupling with independent precursor runs. |
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24 | ! |
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25 | ! 222 2009-01-12 16:04:16Z letzel |
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26 | ! Initial revision |
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27 | ! |
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28 | ! Description: |
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29 | ! ------------ |
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30 | ! Initializing coupling via MPI-1 or MPI-2 if the coupled version of PALM is |
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31 | ! called. |
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32 | !------------------------------------------------------------------------------! |
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33 | |
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34 | USE pegrid |
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35 | USE control_parameters |
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36 | USE indices |
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37 | |
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38 | IMPLICIT NONE |
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39 | |
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40 | ! |
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41 | !-- Local variables |
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42 | INTEGER :: i, inter_color |
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43 | INTEGER, DIMENSION(:) :: bc_data(0:3) = 0 |
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44 | |
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45 | ! |
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46 | !-- Get information about the coupling mode from the environment variable |
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47 | !-- which has been set by the mpiexec command. |
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48 | !-- This method is currently not used because the mpiexec command is not |
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49 | !-- available on some machines |
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50 | ! CALL local_getenv( 'coupling_mode', 13, coupling_mode, i ) |
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51 | ! IF ( i == 0 ) coupling_mode = 'uncoupled' |
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52 | ! IF ( coupling_mode == 'ocean_to_atmosphere' ) coupling_char = '_O' |
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53 | |
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54 | ! |
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55 | !-- Get information about the coupling mode from standard input (PE0 only) and |
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56 | !-- distribute it to the other PEs. If __mpi2 was defined, suggest a |
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57 | !-- coupling via MPI-2. Otherwise initate a coupling using MPI-1 only. |
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58 | !-- In this case, distribute PEs to 2 new communicators. |
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59 | !-- ATTENTION: numprocs will be reset according to the new communicators |
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60 | #if defined ( __parallel ) |
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61 | |
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62 | !myid_absolut = myid |
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63 | IF ( myid == 0 ) THEN |
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64 | READ (*,*,ERR=10,END=10) coupling_mode, bc_data(1), bc_data(2) |
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65 | 10 CONTINUE |
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66 | #if defined( __mpi2 ) |
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67 | IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN |
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68 | i = 1 |
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69 | ELSEIF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' ) THEN |
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70 | i = 2 |
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71 | ELSE |
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72 | i = 0 |
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73 | ENDIF |
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74 | #else |
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75 | IF ( TRIM( coupling_mode ) == 'coupled_run' ) THEN |
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76 | i = 1 |
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77 | ELSE |
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78 | i = 0 |
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79 | ENDIF |
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80 | #endif |
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81 | bc_data(0) = i |
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82 | |
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83 | ! |
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84 | !-- Check if '_O' has to be used as file extension in an uncoupled ocean |
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85 | !-- run. This is required, if this run shall be continued as a coupled run. |
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86 | IF ( TRIM( coupling_mode ) == 'precursor_ocean' ) bc_data(3) = 1 |
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87 | |
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88 | ENDIF |
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89 | |
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90 | CALL MPI_BCAST( bc_data(0), 4, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr ) |
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91 | i = bc_data(0) |
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92 | |
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93 | #if defined ( __mpi2 ) |
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94 | IF ( i == 0 ) THEN |
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95 | coupling_mode = 'uncoupled' |
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96 | ELSEIF ( i == 1 ) THEN |
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97 | coupling_mode = 'atmosphere_to_ocean' |
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98 | ELSEIF ( i == 2 ) THEN |
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99 | coupling_mode = 'ocean_to_atmosphere' |
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100 | ENDIF |
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101 | target_id = myid |
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102 | #else |
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103 | IF ( i == 0 ) THEN |
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104 | coupling_mode = 'uncoupled' |
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105 | ! |
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106 | !-- In case of a precursor ocean run, an additional flag file is created. |
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107 | !-- This is necessary for data_output_2d_on_each_pe = .T. |
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108 | IF ( bc_data(3) == 1 ) THEN |
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109 | OPEN( 90, FILE='PRECURSOR_OCEAN', FORM='FORMATTED' ) |
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110 | WRITE ( 90, '(''TRUE'')' ) |
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111 | CLOSE ( 90 ) |
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112 | ENDIF |
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113 | ELSE |
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114 | comm_inter = MPI_COMM_WORLD |
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115 | |
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116 | IF ( myid < bc_data(1) ) THEN |
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117 | inter_color = 0 |
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118 | numprocs = bc_data(1) |
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119 | coupling_mode = 'atmosphere_to_ocean' |
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120 | ELSE |
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121 | inter_color = 1 |
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122 | numprocs = bc_data(2) |
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123 | coupling_mode = 'ocean_to_atmosphere' |
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124 | ENDIF |
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125 | |
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126 | CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, inter_color, 0, comm_palm, ierr ) |
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127 | comm2d = comm_palm |
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128 | |
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129 | ! |
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130 | !-- Write a flag file for the ocean model and the other atmosphere |
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131 | !-- processes. |
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132 | OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' ) |
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133 | WRITE ( 90, '(''TRUE'')' ) |
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134 | CLOSE ( 90 ) |
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135 | ENDIF |
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136 | #endif |
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137 | #endif |
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138 | |
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139 | ! |
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140 | !-- In case of a precursor ocean run (followed by a coupled run), or a |
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141 | !-- coupled atmosphere-ocean run, set the file extension for the ocean files |
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142 | IF ( TRIM( coupling_mode ) == 'ocean_to_atmosphere' .OR. bc_data(3) == 1 ) & |
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143 | THEN |
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144 | coupling_char = '_O' |
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145 | ENDIF |
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146 | |
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147 | END SUBROUTINE init_coupling |
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