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C $Header: /u/gcmpack/MITgcm/model/src/the_main_loop.F,v 1.23 2001/11/20 21:14:41 heimbach Exp $ |
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: THE_MAIN_LOOP |
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C !INTERFACE: |
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SUBROUTINE THE_MAIN_LOOP( mytime, myiter, mythid ) |
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|
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C !DESCRIPTION: \bv |
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C *================================================================* |
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C | SUBROUTINE the_main_loop |
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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 | |
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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 \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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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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#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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# include "DYNVARS.h" |
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# include "FFIELDS.h" |
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# include "GAD.h" |
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# ifdef ALLOW_PASSIVE_TRACER |
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# include "TR1.h" |
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# endif |
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# ifdef ALLOW_NONHYDROSTATIC |
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# include "CG3D.h" |
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# endif |
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# ifdef EXACT_CONSERV |
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# include "SURFACE.h" |
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# endif |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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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 myThid |
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INTEGER myIter |
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_RL myTime |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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integer iloop |
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#ifdef ALLOW_TAMC_CHECKPOINTING |
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integer ilev_1 |
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integer ilev_2 |
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integer ilev_3 |
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integer max_lev2 |
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integer max_lev3 |
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#endif |
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CEOP |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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c-- Initialize storage for the cost function evaluation. |
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CADJ INIT dummytape = common, 1 |
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c-- Initialize storage for the outermost loop. |
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CADJ INIT tapelev3 = USER |
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#ifdef ALLOW_TAMC_CHECKPOINTING |
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nIter0 = INT( startTime/deltaTClock ) |
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ikey_dynamics = 1 |
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#endif |
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CALL TIMER_START('ADJOINT SPIN-UP', mythid) |
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#endif |
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|
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C-- Set initial conditions (variable arrays) |
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CALL TIMER_START('INITIALISE_VARIA [THE_MAIN_LOOP]', mythid) |
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CALL INITIALISE_VARIA( mythid ) |
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CALL TIMER_STOP ('INITIALISE_VARIA [THE_MAIN_LOOP]', mythid) |
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|
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#ifndef ALLOW_AUTODIFF_TAMC |
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c-- Dump for start state. |
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CALL TIMER_START('WRITE_STATE [THE_MAIN_LOOP]', mythid) |
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CALL WRITE_STATE( mytime, myiter, mythid ) |
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CALL TIMER_STOP ('WRITE_STATE [THE_MAIN_LOOP]', mythid) |
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#endif |
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|
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#ifndef EXCLUDE_MONITOR |
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C-- Check status of solution (statistics, cfl, etc...) |
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CALL TIMER_START('MONITOR [THE_MAIN_LOOP]', mythid) |
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CALL MONITOR( myIter, myTime, myThid ) |
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CALL TIMER_STOP ('MONITOR [THE_MAIN_LOOP]', mythid) |
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#endif /* EXCLUDE_MONITOR */ |
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|
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#ifdef ALLOW_ADJOINT_RUN |
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c-- Add control vector for forcing and parameter fields |
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CALL CTRL_MAP_FORCING (mythid) |
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#endif |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CALL TIMER_STOP ('ADJOINT SPIN-UP', mythid) |
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_BARRIER |
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#endif |
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|
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c-- Do the model integration. |
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CALL TIMER_START('MAIN LOOP [THE_MAIN_LOOP]', mythid) |
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c >>>>>>>>>>>>>>>>>>>>>>>>>>> LOOP <<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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c >>>>>>>>>>>>>>>>>>>>>>>>>>> STARTS <<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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#ifdef ALLOW_TAMC_CHECKPOINTING |
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c-- Implement a three level checkpointing. For a two level |
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c-- checkpointing delete the middle loop; for n levels (n > 3) |
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c-- insert more loops. |
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c-- Check the choice of the checkpointing parameters in relation |
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c-- to nTimeSteps: (nchklev_1*nchklev_2*nchklev_3 .ge. nTimeSteps) |
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if (nchklev_1*nchklev_2*nchklev_3 .lt. nTimeSteps) then |
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print* |
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print*, ' the_main_loop: TAMC checkpointing parameters' |
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print*, ' nchklev_1*nchklev_2*nchklev_3 = ', |
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& nchklev_1*nchklev_2*nchklev_3 |
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print*, ' are not consistent with nTimeSteps = ', |
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& nTimeSteps |
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stop ' ... stopped in the_main_loop.' |
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endif |
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max_lev3=nTimeSteps/(nchklev_1*nchklev_2)+1 |
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max_lev2=nTimeSteps/nchklev_1+1 |
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do ilev_3 = 1,nchklev_3 |
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if(ilev_3.le.max_lev3) then |
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c************************************** |
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#include "checkpoint_lev3_directives.h" |
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c************************************** |
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c-- Initialise storage for the middle loop. |
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CADJ INIT tapelev2 = USER |
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do ilev_2 = 1,nchklev_2 |
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if(ilev_2.le.max_lev2) then |
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c************************************** |
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#include "checkpoint_lev2_directives.h" |
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c************************************** |
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|
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c-- Initialize storage for the innermost loop. |
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c-- Always check common block sizes for the checkpointing! |
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CADJ INIT comlev1 = COMMON,nchklev_1 |
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CADJ INIT comlev1_bibj = COMMON,nchklev_1*nsx*nsy*nthreads_chkpt |
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CADJ INIT comlev1_bibj_k = COMMON,nchklev_1*nsx*nsy*nr*nthreads_chkpt |
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CADJ INIT comlev1_kpp = COMMON,nchklev_1*nsx*nsy |
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#ifndef DISABLE_MULTIDIM_ADVECTION |
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CADJ INIT comlev1_bibj_pass |
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CADJ & = COMMON,nchklev_1*nsx*nsy*nr*nthreads_chkpt*maxpass |
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#endif /* DISABLE_MULTIDIM_ADVECTION */ |
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#ifdef ALLOW_BULKFORMULAE |
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CADJ INIT comlev1_exf_1 |
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CADJ & = COMMON,nchklev_1*snx*nsx*sny*nsy*nthreads_chkpt |
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CADJ INIT comlev1_exf_2 |
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CADJ & = COMMON,niter_bulk*nchklev_1*snx*nsx*sny*nsy*nthreads_chkpt |
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#endif |
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do ilev_1 = 1,nchklev_1 |
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c-- The if-statement below introduces a some flexibility in the |
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c-- choice of the 3-tupel ( nchklev_1, nchklev_2, nchklev_3 ). |
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c-- |
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c-- Requirement: nchklev_1*nchklev_2*nchklev_3 .ge. nTimeSteps . |
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iloop = (ilev_3 - 1)*nchklev_2*nchklev_1 + |
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& (ilev_2 - 1)*nchklev_1 + ilev_1 |
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if ( iloop .le. nTimeSteps ) then |
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#else /* ALLOW_TAMC_CHECKPOINTING undefined */ |
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c-- Initialise storage for reference trajectory without TAMC check- |
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c-- pointing. |
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CADJ INIT history = USER |
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CADJ INIT comlev1_bibj = COMMON,nchklev_0*nsx*nsy*nthreads_chkpt |
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CADJ INIT comlev1_bibj_k = COMMON,nchklev_0*nsx*nsy*nr*nthreads_chkpt |
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CADJ INIT comlev1_kpp = COMMON,nchklev_0*nsx*nsy |
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C-- RG replace 2 by max of num_v_smooth_Ri |
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CADJ INIT comlev1_kpp_sm = COMMON,nchklev_0*nsx*nsy*2 |
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c-- Check the choice of the checkpointing parameters in relation |
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c-- to nTimeSteps: (nchklev_0 .ge. nTimeSteps) |
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if (nchklev_0 .lt. nTimeSteps) then |
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print* |
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print*, ' the_main_loop: TAMC checkpointing parameter ', |
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& 'nchklev_0 = ', nchklev_0 |
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print*, ' not consistent with nTimeSteps = ', |
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& nTimeSteps |
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stop ' ... stopped in the_main_loop.' |
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endif |
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DO iloop = 1, nTimeSteps |
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#endif /* ALLOW_TAMC_CHECKPOINTING */ |
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#else /* ALLOW_AUTODIFF_TAMC undefined */ |
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|
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c-- Start the main loop of adjoint_Objfunc. Automatic differentiation |
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c-- NOT enabled. |
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DO iloop = 1, nTimeSteps |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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c-- >>> Loop body start <<< |
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|
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#ifdef ALLOW_TAMC_CHECKPOINTING |
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nIter0 = INT( startTime/deltaTClock ) |
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ikey_dynamics = ilev_1 |
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#endif |
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|
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|
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CALL TIMER_START('FORWARD_STEP [THE_MAIN_LOOP]',mythid) |
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CALL FORWARD_STEP( iloop, mytime, myiter, mythid ) |
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CALL TIMER_STOP ('FORWARD_STEP [THE_MAIN_LOOP]',mythid) |
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|
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#ifdef ALLOW_COST |
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C-- compare model with data and compute cost function |
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C-- this is done after exchanges to allow interpolation |
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CALL TIMER_START('COST_TILE [THE_MAIN_LOOP]',myThid) |
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CALL COST_TILE ( myThid ) |
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CALL TIMER_STOP ('COST_TILE [THE_MAIN_LOOP]',myThid) |
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#endif |
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|
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c-- >>> Loop body end <<< |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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#ifdef ALLOW_TAMC_CHECKPOINTING |
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endif |
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enddo |
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endif |
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enddo |
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endif |
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enddo |
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#else |
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enddo |
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#endif |
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|
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#else |
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enddo |
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#endif |
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|
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#ifdef ALLOW_COST |
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c-- Sum all cost function contributions. |
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call TIMER_START('COST_FINAL [ADJOINT SPIN-DOWN]', mythid) |
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call COST_FINAL ( mythid ) |
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call TIMER_STOP ('COST_FINAL [ADJOINT SPIN-DOWN]', mythid) |
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#endif |
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|
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_BARRIER |
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CALL TIMER_STOP ('MAIN LOOP [THE_MAIN_LOOP]', mythid) |
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|
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END |
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