/[MITgcm]/MITgcm/pkg/seaice/seaice_jfnk.F
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revision 1.11 by mlosch, Mon Dec 3 15:49:17 2012 UTC revision 1.14 by mlosch, Fri Jan 4 15:48:09 2013 UTC
# Line 60  C     i,j,bi,bj :: loop indices Line 60  C     i,j,bi,bj :: loop indices
60  C     loop indices  C     loop indices
61        INTEGER newtonIter        INTEGER newtonIter
62        INTEGER krylovIter, krylovFails        INTEGER krylovIter, krylovFails
63        INTEGER totalKrylovItersLoc        INTEGER totalKrylovItersLoc, totalNewtonItersLoc
64  C     FGMRES flag that determines amount of output messages of fgmres  C     FGMRES flag that determines amount of output messages of fgmres
65        INTEGER iOutFGMRES        INTEGER iOutFGMRES
66  C     FGMRES flag that indicates what fgmres wants us to do next  C     FGMRES flag that indicates what fgmres wants us to do next
67        INTEGER iCode        INTEGER iCode
68        _RL     JFNKresidual, JFNKresidualTile(nSx,nSy)        _RL     JFNKresidual
69        _RL     JFNKresidualKm1        _RL     JFNKresidualKm1
70  C     parameters to compute convergence criterion  C     parameters to compute convergence criterion
71        _RL     phi_e, alp_e, JFNKgamma_lin        _RL     phi_e, alp_e, JFNKgamma_lin
# Line 80  C Line 80  C
80  C     u/vIceRes :: residual of sea-ice momentum equations  C     u/vIceRes :: residual of sea-ice momentum equations
81        _RL uIceRes(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RL uIceRes(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
82        _RL vIceRes(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RL vIceRes(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
83    C     vector version of the residuals
84          _RL resTmp (nVec,1,nSx,nSy)
85  C     du/vIce   :: ice velocity increment to be added to u/vIce  C     du/vIce   :: ice velocity increment to be added to u/vIce
86        _RL duIce  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RL duIce  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
87        _RL dvIce  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RL dvIce  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
# Line 103  C     Initialise Line 105  C     Initialise
105        recip_deltaT        = 1. _d 0 / SEAICE_deltaTdyn        recip_deltaT        = 1. _d 0 / SEAICE_deltaTdyn
106    
107        iOutFGMRES=0        iOutFGMRES=0
108  C     iOutFgmres=1 gives a little bit of output  C     with iOutFgmres=1, seaice_fgmres prints the residual at each iteration
109        IF ( debugLevel.GE.debLevA .AND.        IF ( debugLevel.GE.debLevC .AND.
110       &     DIFFERENT_MULTIPLE( SEAICE_monFreq, myTime, deltaTClock ) )       &     DIFFERENT_MULTIPLE( SEAICE_monFreq, myTime, deltaTClock ) )
111       &     iOutFGMRES=1       &     iOutFGMRES=1
112    
# Line 144  C     variables DWATN, zeta, and eta) Line 146  C     variables DWATN, zeta, and eta)
146       I      uIce, vIce,       I      uIce, vIce,
147       O      uIceRes, vIceRes,       O      uIceRes, vIceRes,
148       I      newtonIter, 0, myTime, myIter, myThid )       I      newtonIter, 0, myTime, myIter, myThid )
149    C     probably not necessary, will be removed later:
150         CALL EXCH_UV_XY_RL( uIceRes, vIceRes,.TRUE.,myThid)         CALL EXCH_UV_XY_RL( uIceRes, vIceRes,.TRUE.,myThid)
151  C     local copies of precomputed coefficients that are to stay  C     local copies of precomputed coefficients that are to stay
152  C     constant for the preconditioner  C     constant for the preconditioner
# Line 159  C     constant for the preconditioner Line 162  C     constant for the preconditioner
162           ENDDO           ENDDO
163          ENDDO          ENDDO
164         ENDDO         ENDDO
165  C      C     Important: Compute the norm of the residual using the same scalar
166         DO bj=myByLo(myThid),myByHi(myThid)  C     product that SEAICE_FGMRES does
167          DO bi=myBxLo(myThid),myBxHi(myThid)         CALL SEAICE_MAP2VEC(nVec,uIceRes,vIceRes,resTmp,.TRUE.,myThid)
168           JFNKresidualTile(bi,bj) = 0. _d 0         CALL SEAICE_SCALPROD(
169           DO J=1,sNy       &      nVec,1,1,1,resTmp,resTmp,JFNKresidual,myThid)
           DO I=1,sNx  
 #ifdef CG2D_SINGLECPU_SUM  
            JFNKlocalBuf(I,J,bi,bj) =  
 #else  
            JFNKresidualTile(bi,bj) = JFNKresidualTile(bi,bj) +  
 #endif  
      &          uIceRes(I,J,bi,bj)*uIceRes(I,J,bi,bj) +  
      &          vIceRes(I,J,bi,bj)*vIceRes(I,J,bi,bj)  
           ENDDO  
          ENDDO  
         ENDDO  
        ENDDO  
        JFNKresidual = 0. _d 0  
 #ifdef CG2D_SINGLECPU_SUM  
        CALL GLOBAL_SUM_SINGLECPU_RL(  
      &         JFNKlocalBuf,JFNKresidual, 0, 0, myThid)  
 #else  
        CALL GLOBAL_SUM_TILE_RL( JFNKresidualTile,JFNKresidual,myThid )  
 #endif  
170         JFNKresidual = SQRT(JFNKresidual)         JFNKresidual = SQRT(JFNKresidual)
171  C     compute convergence criterion for linear preconditioned FGMRES  C     compute convergence criterion for linear preconditioned FGMRES
172         JFNKgamma_lin = JFNKgamma_lin_max         JFNKgamma_lin = JFNKgamma_lin_max
# Line 205  C     krylovIter is mapped into "its" in Line 189  C     krylovIter is mapped into "its" in
189  C     in that routine  C     in that routine
190         krylovIter    = 0         krylovIter    = 0
191         iCode         = 0         iCode         = 0
        IF ( debugLevel.GE.debLevA ) THEN    
         _BEGIN_MASTER( myThid )  
         WRITE(msgBuf,'(2A,2(1XI6),2E12.5)')  
      &       ' S/R SEAICE_JFNK: newtonIter,',  
      &       ' total newtonIter, JFNKgamma_lin, initial norm = ',  
      &       newtonIter,SEAICEnewtonIterMax*(myIter-nIter0)+newtonIter,  
      &       JFNKgamma_lin, JFNKresidual  
         CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,  
      &       SQUEEZE_RIGHT, myThid )  
         _END_MASTER( myThid )  
        ENDIF  
192  C  C
193         JFNKconverged = JFNKresidual.LT.JFNKtol         JFNKconverged = JFNKresidual.LT.JFNKtol
194  C  C
# Line 261  C     End of Krylov iterate Line 234  C     End of Krylov iterate
234  C     some output diagnostics  C     some output diagnostics
235          IF ( debugLevel.GE.debLevA ) THEN          IF ( debugLevel.GE.debLevA ) THEN
236           _BEGIN_MASTER( myThid )           _BEGIN_MASTER( myThid )
237             totalNewtonItersLoc =
238         &        SEAICEnewtonIterMax*(myIter-nIter0)+newtonIter
239             WRITE(msgBuf,'(2A,2(1XI6),2E12.5)')
240         &        ' S/R SEAICE_JFNK: Newton iterate / total, ',
241         &        'JFNKgamma_lin, initial norm = ',
242         &        newtonIter, totalNewtonItersLoc,
243         &        JFNKgamma_lin,JFNKresidual
244             CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
245         &        SQUEEZE_RIGHT, myThid )
246           WRITE(msgBuf,'(3(A,I6))')           WRITE(msgBuf,'(3(A,I6))')
247       &        ' S/R SEAICE_JFNK: Newton iterate / total = ', newtonIter,       &        ' S/R SEAICE_JFNK: Newton iterate / total = ',newtonIter,
248       &        ' / ', SEAICEnewtonIterMax*(myIter-nIter0)+newtonIter,       &        ' / ', totalNewtonItersLoc,
249       &        ', Nb. of FGMRES iterations = ', krylovIter       &        ', Nb. of FGMRES iterations = ', krylovIter
250           CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,           CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
251       &        SQUEEZE_RIGHT, myThid )       &        SQUEEZE_RIGHT, myThid )
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