source: palm/trunk/SOURCE/check_for_restart.f90 @ 1310

Last change on this file since 1310 was 1310, checked in by raasch, 7 years ago

update of GPL copyright

  • Property svn:keywords set to Id
File size: 6.9 KB
Line 
1 SUBROUTINE check_for_restart
2
3!--------------------------------------------------------------------------------!
4! This file is part of PALM.
5!
6! PALM is free software: you can redistribute it and/or modify it under the terms
7! of the GNU General Public License as published by the Free Software Foundation,
8! either version 3 of the License, or (at your option) any later version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2014 Leibniz Universitaet Hannover
18!--------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: check_for_restart.f90 1310 2014-03-14 08:01:56Z raasch $
27!
28! 1036 2012-10-22 13:43:42Z raasch
29! code put under GPL (PALM 3.9)
30!
31! 1032 2012-10-21 13:03:21Z letzel
32! minor reformatting
33!
34! 667 2010-12-23 12:06:00Z suehring/gryschka
35! Exchange of terminate_coupled between ocean and atmosphere by PE0
36!
37! 622 2010-12-10 08:08:13Z raasch
38! optional barriers included in order to speed up collective operations
39!
40! 291 2009-04-16 12:07:26Z raasch
41! Coupling with independent precursor runs.
42! Output of messages replaced by message handling routine
43!
44! 222 2009-01-12 16:04:16Z letzel
45! Implementation of an MPI-1 coupling: replaced myid with target_id
46! Bugfix for nonparallel execution
47!
48! 108 2007-08-24 15:10:38Z letzel
49! modifications to terminate coupled runs
50!
51! RCS Log replace by Id keyword, revision history cleaned up
52!
53! Revision 1.11  2007/02/11 12:55:13  raasch
54! Informative output to the job protocol
55!
56! Revision 1.1  1998/03/18 20:06:51  raasch
57! Initial revision
58!
59!
60! Description:
61! ------------
62! Set stop flag, if restart is neccessary because of expiring cpu-time or
63! if it is forced by user
64!------------------------------------------------------------------------------!
65
66    USE pegrid
67    USE control_parameters
68
69    IMPLICIT NONE
70
71
72    LOGICAL :: terminate_run_l
73    REAL ::  remaining_time
74
75
76!
77!-- Check remaining CPU-time
78    CALL local_tremain( remaining_time )
79
80!
81!-- If necessary set a flag to stop the model run
82    terminate_run_l = .FALSE.
83    IF ( remaining_time <= termination_time_needed  .AND. &
84         write_binary(1:4) == 'true' )  THEN
85
86       terminate_run_l = .TRUE.
87    ENDIF
88
89#if defined( __parallel )
90!
91!-- Make a logical OR for all processes. Stop the model run if at least
92!-- one processor has reached the time limit.
93    IF ( collective_wait )  CALL MPI_BARRIER( comm2d, ierr )
94    CALL MPI_ALLREDUCE( terminate_run_l, terminate_run, 1, MPI_LOGICAL, &
95                        MPI_LOR, comm2d, ierr )
96#else
97    terminate_run = terminate_run_l
98#endif
99
100!
101!-- Output that job will be terminated
102    IF ( terminate_run  .AND.  myid == 0 )  THEN
103       WRITE( message_string, * ) 'run will be terminated because it is ', &
104                       'running out of job cpu limit & ',                  &
105                       'remaining time:         ', remaining_time, ' s',   &
106                       'termination time needed:', termination_time_needed, ' s'
107       CALL message( 'check_for_restart', 'PA0163', 0, 1, 0, 6, 0 )
108    ENDIF
109
110!
111!-- In case of coupled runs inform the remote model of the termination
112!-- and its reason, provided the remote model has not already been
113!-- informed of another termination reason (terminate_coupled > 0) before,
114!-- or vice versa (terminate_coupled_remote > 0).
115    IF ( terminate_run .AND. TRIM( coupling_mode ) /= 'uncoupled'  .AND. &
116         terminate_coupled == 0  .AND.  terminate_coupled_remote == 0 )  THEN
117
118       terminate_coupled = 3
119#if defined( __parallel )
120       IF ( myid == 0 ) THEN
121          CALL MPI_SENDRECV( terminate_coupled,        1, MPI_INTEGER,         &
122                             target_id, 0,                                     &
123                             terminate_coupled_remote, 1, MPI_INTEGER,         &
124                             target_id, 0,                                     &
125                             comm_inter, status, ierr )
126       ENDIF
127       CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d,  &
128                       ierr )
129#endif
130    ENDIF
131
132!
133!-- Set the stop flag also, if restart is forced by user
134    IF ( time_restart /= 9999999.9  .AND.  &
135         time_restart < time_since_reference_point )  THEN
136
137!
138!--    Restart is not neccessary, if the end time of the run (given by
139!--    the user) has been reached
140       IF ( simulated_time < end_time )  THEN
141          terminate_run = .TRUE.
142!
143!--       Increment restart time, if forced by user, otherwise set restart
144!--       time to default (no user restart)
145          IF ( dt_restart /= 9999999.9 )  THEN
146             time_restart = time_restart + dt_restart
147          ELSE
148             time_restart = 9999999.9
149          ENDIF
150
151          WRITE( message_string, * ) 'run will be terminated due to user ', &
152                                  'settings of',                            &
153                                  '&restart_time / dt_restart',             &
154                                  '&new restart time is: ', time_restart, ' s' 
155          CALL message( 'check_for_restart', 'PA0164', 0, 0, 0, 6, 0 )
156 
157!
158!--       In case of coupled runs inform the remote model of the termination
159!--       and its reason, provided the remote model has not already been
160!--       informed of another termination reason (terminate_coupled > 0) before,
161!--       or vice versa (terminate_coupled_remote > 0).
162          IF ( coupling_mode /= 'uncoupled' .AND. terminate_coupled == 0  &
163               .AND.  terminate_coupled_remote == 0 )  THEN
164
165             IF ( dt_restart /= 9999999.9 )  THEN
166                terminate_coupled = 4
167             ELSE
168                terminate_coupled = 5
169             ENDIF
170#if defined( __parallel )
171             IF ( myid == 0 ) THEN
172                CALL MPI_SENDRECV( terminate_coupled,        1, MPI_INTEGER,   &
173                                   target_id,  0,                              &
174                                   terminate_coupled_remote, 1, MPI_INTEGER,   &
175                                   target_id,  0,                              &
176                                   comm_inter, status, ierr )   
177             ENDIF
178             CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0,  &
179                             comm2d, ierr ) 
180#endif
181          ENDIF
182       ELSE
183          time_restart = 9999999.9
184       ENDIF
185    ENDIF
186
187!
188!-- If the run is stopped, set a flag file which is necessary to initiate
189!-- the start of a continuation run
190    IF ( terminate_run  .AND.  myid == 0 )  THEN
191
192       OPEN ( 90, FILE='CONTINUE_RUN', FORM='FORMATTED' )
193       WRITE ( 90, '(A)' )  TRIM( run_description_header )
194       CLOSE ( 90 )
195
196    ENDIF
197
198
199 END SUBROUTINE check_for_restart
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