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C $Header: /u/gcmpack/models/MITgcmUV/model/src/the_model_main.F,v 1.34 2001/02/08 18:13:37 jmc Exp $ |
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C $Name: checkpoint35 $ |
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#include "CPP_OPTIONS.h" |
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|
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SUBROUTINE THE_MODEL_MAIN(myThid) |
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C /==========================================================\ |
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C | SUBROUTINE THE_MODEL_MAIN | |
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C | o Master controlling routine for model using the MITgcm | |
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C | UV parallel wrapper. | |
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C |==========================================================| |
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C | THE_MODEL_MAIN is invoked by the MITgcm UV parallel | |
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C | wrapper with a single integer argument "myThid". This | |
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C | variable identifies the thread number of an instance of | |
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C | THE_MODEL_MAIN. Each instance of THE_MODEL_MAIN works | |
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C | on a particular region of the models domain and | |
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C | synchronises with other instances as necessary. The | |
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C | routine has to "understand" the MITgcm parallel | |
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C | environment and the numerical algorithm. Editing this | |
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C | routine is best done with some knowledge of both aspects.| |
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C | Notes | |
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C | ===== | |
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C | C*P* comments indicating place holders for which code is | |
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C | presently being developed. | |
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C \==========================================================/ |
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IMPLICIT NONE |
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C |
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C Call Tree |
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C ========= |
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C |
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C main ( eesupp ) |
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C | |
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C . |
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C . |
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C . Generic environment initialisation ( see eesupp/src and |
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C . eesupp/inc ) |
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C . multiple threads and/or processes are created in here |
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C . |
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C . |
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C . |
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C | |
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C |-THE_MODEL_MAIN - Begin specific model. One instance |
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C | | of this codes exists for each thread |
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C | | and/or instance. Each instance manages |
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C | | a specifc set of tiles. |
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C | | |
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C | |--INITIALISE_FIXED |
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C | | o Set model configuration (fixed arrays) |
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C | | Topography, hydrography, timestep, grid, etc.. |
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C | | |
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C | |--THE_MAIN_LOOP |
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C | | | |
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C | | |--INITIALISE_VARIA |
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C | | | o Set initial conditions (variable arrays) |
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C | | | |
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C ==> | | | ** Time stepping loop starts here ** |
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C | | | | |
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C /|\ | | | |
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C | | | |--FORWARD_STEP |
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C /|\ | | | | o Does a single forward step of the model |
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C | | | | | |
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C /|\ | | | | |
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C | | | | |--LOAD_EXTERNAL_DATA |
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C /|\ | | | | o Load and/or set time dependent forcing fields |
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C | | | | | |
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C /|\ | | | |--DYNAMICS |
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C | | | | | o Evaluate "forward" terms |
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C /|\ | | | | |
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C | | | | |--SOLVE_FOR_PRESSURE |
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C /|\ | | | | o Find pressure field to keep flow non-divergent |
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C | | | | | |
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C /|\ | | | |--THE_CORRECTION_STEP |
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C | | | | | o Correct flow field with and cycle time-stepping arrays |
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C /|\ | | | | |
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C | | | | |--DO_GTERM_BLOCKING_EXCHANGES |
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C /|\ | | | | o Update overlap regions |
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C | | | | | |
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C /|\ | | | |--DO_THE_MODEL_IO |
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C | | | | | o Write model state |
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C /|\ | | | | |
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C | | | | |--WRITE_CHECKPOINT |
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C /|\ | | | | o Write restart file(s) |
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C | | | | |
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C /|\ | | | |
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C |<== | | | ** Time stepping loop finishes here ** |
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C | | | |
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C | | |-- |
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C | | |
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C | |--WRITE_STATE |
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C | |--WRITE_CHECKPOINT |
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C | |
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C . |
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C . |
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C . Generic environment termination ( see eesupp/src and |
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C . eesupp/inc ) |
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C . |
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C . |
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C == Global variables === |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "CG2D.h" |
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#ifdef ALLOW_NONHYDROSTATIC |
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#include "CG3D.h" |
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#endif |
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|
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C == Routine arguments == |
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C myThid - Thread number for this instance of the routine. |
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INTEGER myThid |
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|
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C == Local variables == |
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C Note: Under the multi-threaded model myCurrentIter and |
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C myCurrentTime are local variables passed around as routine |
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C arguments. Although this is fiddly it saves the need to |
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C impose additional synchronisation points when they are |
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C updated. |
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C myCurrentTime - Time counter for this thread |
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C myCurrentIter - Iteration counter for this thread |
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INTEGER myCurrentIter |
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_RL myCurrentTime |
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C-- This timer encompasses the whole code |
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CALL TIMER_START('ALL [THE_MODEL_MAIN]',myThid) |
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|
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C-- Set model configuration (fixed arrays) |
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CALL TIMER_START('INITIALISE_FIXED [THE_MODEL_MAIN]',myThid) |
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CALL INITIALISE_FIXED( myThid ) |
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CALL TIMER_STOP ('INITIALISE_FIXED [THE_MODEL_MAIN]',myThid) |
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myCurrentTime = startTime |
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myCurrentIter = nIter0 |
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C-- Call time stepping loop of full model |
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CALL TIMER_START('THE_MAIN_LOOP [THE_MODEL_MAIN]',myThid) |
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CALL THE_MAIN_LOOP(myCurrentTime, myCurrentIter, myThid ) |
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CALL TIMER_STOP ('THE_MAIN_LOOP [THE_MODEL_MAIN]',myThid) |
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CALL TIMER_STOP ('ALL [THE_MODEL_MAIN]',myThid) |
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C-- Write timer statistics |
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IF ( myThid .EQ. 1 ) THEN |
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CALL TIMER_PRINTALL( myThid ) |
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CALL COMM_STATS |
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ENDIF |
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|
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RETURN |
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END |
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