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adcroft |
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#include "CPP_OPTIONS.h" |
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heimbach |
1.12 |
subroutine forward_step( iloop, mytime, myiter, mythid ) |
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c ================================================================== |
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c SUBROUTINE forward_step |
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c ================================================================== |
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c |
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c o Run the ocean model and evaluate the specified cost function. |
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c |
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c *the_main_loop* is the toplevel routine for the Tangent Linear and |
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c Adjoint Model Compiler (TAMC). For this purpose the initialization |
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c of the model was split into two parts. Those parameters that do |
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c not depend on a specific model run are set in *initialise_fixed*, |
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c whereas those that do depend on the specific realization are |
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c initialized in *initialise_varia*. |
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c This routine is to be used in conjuction with the MITgcmuv |
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c checkpoint 37. |
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c |
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c ================================================================== |
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c SUBROUTINE forward_step |
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c ================================================================== |
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implicit none |
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c == global variables == |
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adcroft |
1.1 |
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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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heimbach |
1.12 |
#include "FFIELDS.h" |
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#include "TR1.h" |
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adcroft |
1.1 |
#ifdef ALLOW_NONHYDROSTATIC |
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#include "CG3D.h" |
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#endif |
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heimbach |
1.12 |
#ifdef ALLOW_AUTODIFF_TAMC |
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#include "tamc.h" |
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#include "ctrl.h" |
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#include "ctrl_dummy.h" |
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#include "cost.h" |
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#endif |
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c == routine arguments == |
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c note: under the multi-threaded model myiter and |
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c mytime 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 myiter - iteration counter for this thread |
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c mytime - time counter for this thread |
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c mythid - thread number for this instance of the routine. |
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integer iloop |
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integer mythid |
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integer myiter |
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_RL mytime |
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c == local variables == |
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c-- == end of interface == |
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c-- >>> Loop body start <<< |
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#ifdef ALLOW_AUTODIFF_TAMC |
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c-- Set the model iteration counter and the model time. |
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myiter = nIter0 + (iloop-1) |
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mytime = startTime + float(iloop-1)*deltaTclock |
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c Include call to a dummy routine. Its adjoint will be |
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c called at the proper place in the adjoint code. |
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c The adjoint routine will print out adjoint values |
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c if requested. The location of the call is important, |
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c it has to be after the adjoint of the exchanges |
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c (DO_GTERM_BLOCKING_EXCHANGES). |
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call dummy_in_stepping( myTime, myIter, myThid ) |
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#endif |
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c-- Load forcing/external data fields. |
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#ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE |
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c NOTE, that although the exf package is part of the |
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c distribution, it is not currently maintained, i.e. |
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c exf is disabled by default in genmake. |
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CALL EXF_GETFORCING( mytime, myiter, mythid ) |
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#else |
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CALL TIMER_START('EXTERNAL_FIELDS_LOAD[THE_MAIN_LOOP]',mythid) |
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CALL EXTERNAL_FIELDS_LOAD( mytime, myiter, mythid ) |
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CALL TIMER_STOP ('EXTERNAL_FIELDS_LOAD[THE_MAIN_LOOP]',mythid) |
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#endif |
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c-- Step forward fields and calculate time tendency terms. |
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CALL TIMER_START('DYNAMICS [THE_MAIN_LOOP]',mythid) |
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CALL DYNAMICS( myTime, myIter, myThid ) |
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CALL TIMER_STOP ('DYNAMICS [THE_MAIN_LOOP]',mythid) |
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#ifndef ALLOW_AUTODIFF_TAMC |
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adcroft |
1.1 |
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#ifdef ALLOW_NONHYDROSTATIC |
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C-- Step forward W field in N-H algorithm |
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heimbach |
1.12 |
IF ( nonHydrostatic ) THEN |
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CALL TIMER_START('CALC_GW [THE_MAIN_LOOP]',myThid) |
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CALL CALC_GW(myThid) |
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CALL TIMER_STOP ('CALC_GW [THE_MAIN_LOOP]',myThid) |
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ENDIF |
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adcroft |
1.1 |
#endif |
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adcroft |
1.5 |
#ifdef ALLOW_SHAP_FILT |
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C-- Step forward all tiles, filter and exchange. |
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heimbach |
1.12 |
CALL TIMER_START('SHAP_FILT [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.5 |
CALL SHAP_FILT_APPLY( |
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I gUnm1, gVnm1, gTnm1, gSnm1, |
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heimbach |
1.12 |
I myTime, myIter, myThid ) |
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jmc |
1.9 |
IF (implicDiv2Dflow.LT.1.) THEN |
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C-- Explicit+Implicit part of the Barotropic Flow Divergence |
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C => Filtering of uVel,vVel is necessary |
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heimbach |
1.12 |
CALL SHAP_FILT_UV( uVel, vVel, myTime, myThid ) |
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jmc |
1.9 |
ENDIF |
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heimbach |
1.12 |
CALL TIMER_STOP ('SHAP_FILT [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.5 |
#endif |
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#ifdef ALLOW_ZONAL_FILT |
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jmc |
1.8 |
IF (zonal_filt_lat.LT.90.) THEN |
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heimbach |
1.12 |
CALL TIMER_START('ZONAL_FILT_APPLY [THE_MAIN_LOOP]',myThid) |
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CALL ZONAL_FILT_APPLY( |
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adcroft |
1.5 |
U gUnm1, gVnm1, gTnm1, gSnm1, |
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I myThid ) |
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heimbach |
1.12 |
CALL TIMER_STOP ('ZONAL_FILT_APPLY [THE_MAIN_LOOP]',myThid) |
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jmc |
1.8 |
ENDIF |
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adcroft |
1.5 |
#endif |
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heimbach |
1.12 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
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adcroft |
1.1 |
C-- Solve elliptic equation(s). |
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C Two-dimensional only for conventional hydrostatic or |
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C three-dimensional for non-hydrostatic and/or IGW scheme. |
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heimbach |
1.12 |
CALL TIMER_START('SOLVE_FOR_PRESSURE [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.1 |
CALL SOLVE_FOR_PRESSURE( myThid ) |
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heimbach |
1.12 |
CALL TIMER_STOP ('SOLVE_FOR_PRESSURE [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.1 |
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adcroft |
1.5 |
C-- Correct divergence in flow field and cycle time-stepping |
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jmc |
1.7 |
C arrays (for all fields) ; update time-counter |
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heimbach |
1.12 |
myIter = nIter0 + iLoop |
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myTime = startTime + deltaTClock * float(iLoop) |
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CALL TIMER_START('THE_CORRECTION_STEP [THE_MAIN_LOOP]',myThid) |
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CALL THE_CORRECTION_STEP(myTime, myIter, myThid) |
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CALL TIMER_STOP ('THE_CORRECTION_STEP [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.5 |
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adcroft |
1.1 |
C-- Do "blocking" sends and receives for tendency "overlap" terms |
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heimbach |
1.12 |
c CALL TIMER_START('BLOCKING_EXCHANGES [THE_MAIN_LOOP]',myThid) |
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jmc |
1.7 |
c CALL DO_GTERM_BLOCKING_EXCHANGES( myThid ) |
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heimbach |
1.12 |
c CALL TIMER_STOP ('BLOCKING_EXCHANGES [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.5 |
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C-- Do "blocking" sends and receives for field "overlap" terms |
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heimbach |
1.12 |
CALL TIMER_START('BLOCKING_EXCHANGES [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.5 |
CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid ) |
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heimbach |
1.12 |
CALL TIMER_STOP ('BLOCKING_EXCHANGES [THE_MAIN_LOOP]',myThid) |
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#ifndef EXCLUDE_MONITOR |
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C-- Check status of solution (statistics, cfl, etc...) |
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CALL MONITOR( myIter, myTime, myThid ) |
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#endif /* EXCLUDE_MONITOR */ |
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adcroft |
1.1 |
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heimbach |
1.12 |
#ifndef ALLOW_AUTODIFF_TAMC |
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jmc |
1.7 |
C-- Do IO if needed. |
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heimbach |
1.12 |
CALL TIMER_START('DO_THE_MODEL_IO [THE_MAIN_LOOP]',myThid) |
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CALL DO_THE_MODEL_IO( myTime, myIter, myThid ) |
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CALL TIMER_STOP ('DO_THE_MODEL_IO [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.1 |
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C-- Save state for restarts |
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jmc |
1.7 |
C Note: (jmc: is it still the case after ckp35 ?) |
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adcroft |
1.1 |
C ===== |
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C Because of the ordering of the timestepping code and |
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C tendency term code at end of loop model arrays hold |
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C U,V,T,S at "time-level" N but gu, gv, gs, gt, guNM1,... |
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C at "time-level" N+1/2 (guNM1 at "time-level" N+1/2 is |
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jmc |
1.10 |
C gu at "time-level" N-1/2) and etaN at "time-level" N+1/2. |
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adcroft |
1.1 |
C where N = I+timeLevBase-1 |
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C Thus a checkpoint contains U.0000000000, GU.0000000001 and |
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jmc |
1.10 |
C etaN.0000000001 in the indexing scheme used for the model |
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adcroft |
1.1 |
C "state" files. This example is referred to as a checkpoint |
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C at time level 1 |
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heimbach |
1.12 |
CALL TIMER_START('WRITE_CHECKPOINT [THE_MAIN_LOOP]',myThid) |
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adcroft |
1.1 |
CALL WRITE_CHECKPOINT( |
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heimbach |
1.12 |
& .FALSE., myTime, myIter, myThid ) |
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CALL TIMER_STOP ('WRITE_CHECKPOINT [THE_MAIN_LOOP]',myThid) |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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adcroft |
1.1 |
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heimbach |
1.12 |
c-- >>> Loop body end <<< |
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adcroft |
1.1 |
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END |
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