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Commit a4da548e authored by Sibylle TECHENE's avatar Sibylle TECHENE
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reduce local memory usage #80

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src/OCE/TRA/trazdf.F90
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...@@ -6,6 +6,7 @@ MODULE trazdf ...@@ -6,6 +6,7 @@ MODULE trazdf
!! History : 1.0 ! 2005-11 (G. Madec) Original code !! History : 1.0 ! 2005-11 (G. Madec) Original code
!! 3.0 ! 2008-01 (C. Ethe, G. Madec) merge TRC-TRA !! 3.0 ! 2008-01 (C. Ethe, G. Madec) merge TRC-TRA
!! 4.0 ! 2017-06 (G. Madec) remove explict time-stepping option !! 4.0 ! 2017-06 (G. Madec) remove explict time-stepping option
!! 4.5 ! 2022-06 (G. Madec) refactoring to reduce memory usage (j-k-i loops)
!!---------------------------------------------------------------------- !!----------------------------------------------------------------------
!!---------------------------------------------------------------------- !!----------------------------------------------------------------------
...@@ -22,7 +23,7 @@ MODULE trazdf ...@@ -22,7 +23,7 @@ MODULE trazdf
USE ldfslp ! lateral diffusion: iso-neutral slope USE ldfslp ! lateral diffusion: iso-neutral slope
USE trd_oce ! trends: ocean variables USE trd_oce ! trends: ocean variables
USE trdtra ! trends: tracer trend manager USE trdtra ! trends: tracer trend manager
USE eosbn2, ONLY: ln_SEOS, rn_b0 USE eosbn2 , ONLY: ln_SEOS, rn_b0
! !
USE in_out_manager ! I/O manager USE in_out_manager ! I/O manager
USE prtctl ! Print control USE prtctl ! Print control
...@@ -77,7 +78,7 @@ CONTAINS ...@@ -77,7 +78,7 @@ CONTAINS
ENDIF ENDIF
! !
! !* compute lateral mixing trend and add it to the general trend ! !* compute lateral mixing trend and add it to the general trend
CALL tra_zdf_imp( kt, nit000, 'TRA', rDt, Kbb, Kmm, Krhs, pts, Kaa, jpts ) CALL tra_zdf_imp( 'TRA', Kbb, Kmm, Krhs, pts, Kaa, jpts )
!!gm WHY here ! and I don't like that ! !!gm WHY here ! and I don't like that !
! DRAKKAR SSS control { ! DRAKKAR SSS control {
...@@ -116,7 +117,7 @@ CONTAINS ...@@ -116,7 +117,7 @@ CONTAINS
END SUBROUTINE tra_zdf END SUBROUTINE tra_zdf
SUBROUTINE tra_zdf_imp( kt, kit000, cdtype, p2dt, Kbb, Kmm, Krhs, pt, Kaa, kjpt ) SUBROUTINE tra_zdf_imp( cdtype, Kbb, Kmm, Krhs, pt, Kaa, kjpt )
!!---------------------------------------------------------------------- !!----------------------------------------------------------------------
!! *** ROUTINE tra_zdf_imp *** !! *** ROUTINE tra_zdf_imp ***
!! !!
...@@ -136,128 +137,177 @@ CONTAINS ...@@ -136,128 +137,177 @@ CONTAINS
!! !!
!! ** Action : - pt(:,:,:,:,Kaa) becomes the after tracer !! ** Action : - pt(:,:,:,:,Kaa) becomes the after tracer
!!--------------------------------------------------------------------- !!---------------------------------------------------------------------
INTEGER , INTENT(in ) :: kt ! ocean time-step index
INTEGER , INTENT(in ) :: Kbb, Kmm, Krhs, Kaa ! ocean time level indices INTEGER , INTENT(in ) :: Kbb, Kmm, Krhs, Kaa ! ocean time level indices
INTEGER , INTENT(in ) :: kit000 ! first time step index
CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator)
INTEGER , INTENT(in ) :: kjpt ! number of tracers INTEGER , INTENT(in ) :: kjpt ! number of tracers
REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step
REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt,jpt), INTENT(inout) :: pt ! tracers and RHS of tracer equation REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt,jpt), INTENT(inout) :: pt ! tracers and RHS of tracer equation
! !
INTEGER :: ji, jj, jk, jn ! dummy loop indices INTEGER :: ji, jj, jk, jn ! dummy loop indices
REAL(wp) :: zrhs, zzwi, zzws ! local scalars REAL(wp) :: zrhs, zzwi, zzws ! local scalars
REAL(wp), DIMENSION(A2D(nn_hls),jpk) :: zwi, zwt, zwd, zws REAL(wp), DIMENSION(A1Di(0),jpk) :: zwi, zwt, zwd, zws
!!--------------------------------------------------------------------- !!---------------------------------------------------------------------
! !
! ! ============= ! ! ! ================= !
DO jn = 1, kjpt ! tracer loop ! DO_1Dj( 0, 0 ) ! i-k slices loop !
! ! ============= ! ! ! ================= !
! Matrix construction DO jn = 1, kjpt ! tracer loop !
! -------------------- ! ! ================= !
! Build matrix if temperature or salinity (only in double diffusion case) or first passive tracer
!
IF( ( cdtype == 'TRA' .AND. ( jn == jp_tem .OR. ( jn == jp_sal .AND. ln_zdfddm ) ) ) .OR. &
& ( cdtype == 'TRC' .AND. jn == 1 ) ) THEN
! !
! vertical mixing coef.: avt for temperature, avs for salinity and passive tracers ! Matrix construction
IF( cdtype == 'TRA' .AND. jn == jp_tem ) THEN ! --------------------
DO_3D( 1, 1, 1, 1, 2, jpk ) ! Build matrix if temperature or salinity (only in double diffusion case) or first passive tracer
zwt(ji,jj,jk) = avt(ji,jj,jk)
END_3D
ELSE
DO_3D( 1, 1, 1, 1, 2, jpk )
zwt(ji,jj,jk) = avs(ji,jj,jk)
END_3D
ENDIF
zwt(:,:,1) = 0._wp
! !
IF( l_ldfslp ) THEN ! isoneutral diffusion: add the contribution IF( ( cdtype == 'TRA' .AND. ( jn == jp_tem .OR. ( jn == jp_sal .AND. ln_zdfddm ) ) ) .OR. &
IF( ln_traldf_msc ) THEN ! MSC iso-neutral operator & ( cdtype == 'TRC' .AND. jn == 1 ) ) THEN
DO_3D( 0, 0, 0, 0, 2, jpkm1 ) !
zwt(ji,jj,jk) = zwt(ji,jj,jk) + akz(ji,jj,jk) ! vertical mixing coef.: avt for temperature, avs for salinity and passive tracers
END_3D !
ELSE ! standard or triad iso-neutral operator IF( cdtype == 'TRA' .AND. jn == jp_tem ) THEN ! use avt for temperature
DO_3D( 0, 0, 0, 0, 2, jpkm1 ) !
zwt(ji,jj,jk) = zwt(ji,jj,jk) + ah_wslp2(ji,jj,jk) IF( l_ldfslp ) THEN ! use avt + isoneutral diffusion contribution
END_3D IF( ln_traldf_msc ) THEN ! MSC iso-neutral operator
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avt(ji,jj,jk) + akz(ji,jj,jk)
END_2D
ELSE ! standard or triad iso-neutral operator
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avt(ji,jj,jk) + ah_wslp2(ji,jj,jk)
END_2D
ENDIF
ELSE ! use avt only
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avt(ji,jj,jk)
END_2D
ENDIF
!
ELSE ! use avs for salinty or passive tracers
!
IF( l_ldfslp ) THEN ! use avs + isoneutral diffusion contribution
IF( ln_traldf_msc ) THEN ! MSC iso-neutral operator
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avs(ji,jj,jk) + akz(ji,jj,jk)
END_2D
ELSE ! standard or triad iso-neutral operator
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avs(ji,jj,jk) + ah_wslp2(ji,jj,jk)
END_2D
ENDIF
ELSE !
DO_2Dik( 0, 0, 2, jpk, 1 )
zwt(ji,jk) = avs(ji,jj,jk)
END_2D
ENDIF
ENDIF ENDIF
zwt(:,1) = 0._wp
!
! Diagonal, lower (i), upper (s) (including the bottom boundary condition since avt is masked)
IF( ln_zad_Aimp ) THEN ! Adaptive implicit vertical advection
DO_2Dik( 0, 0, 1, jpkm1, 1 )
zzwi = - rDt * zwt(ji,jk ) / e3w(ji,jj,jk ,Kmm)
zzws = - rDt * zwt(ji,jk+1) / e3w(ji,jj,jk+1,Kmm)
zwd(ji,jk) = e3t(ji,jj,jk,Kaa) - zzwi - zzws &
& + rDt * ( MAX( wi(ji,jj,jk ) , 0._wp ) &
& - MIN( wi(ji,jj,jk+1) , 0._wp ) )
zwi(ji,jk) = zzwi + rDt * MIN( wi(ji,jj,jk ) , 0._wp )
zws(ji,jk) = zzws - rDt * MAX( wi(ji,jj,jk+1) , 0._wp )
END_2D
ELSE
DO_2Dik( 0, 0, 1, jpkm1, 1 )
zwi(ji,jk) = - rDt * zwt(ji,jk ) / e3w(ji,jj,jk,Kmm)
zws(ji,jk) = - rDt * zwt(ji,jk+1) / e3w(ji,jj,jk+1,Kmm)
zwd(ji,jk) = e3t(ji,jj,jk,Kaa) - zwi(ji,jk) - zws(ji,jk)
END_2D
ENDIF
!
!!gm BUG?? : if edmfm is equivalent to a w ==>>> just add +/- rDt * edmfm(ji,jj,jk+1/jk )
!! but edmfm is at t-point !!!! crazy??? why not keep it at w-point????
!
IF( ln_zdfmfc ) THEN ! add upward Mass Flux in the matrix
DO_2Dik( 0, 0, 1, jpkm1, 1 )
zws(ji,jk) = zws(ji,jk) + e3t(ji,jj,jk,Kaa) * rDt * edmfm(ji,jj,jk+1) / e3w(ji,jj,jk+1,Kmm)
zwd(ji,jk) = zwd(ji,jk) - e3t(ji,jj,jk,Kaa) * rDt * edmfm(ji,jj,jk ) / e3w(ji,jj,jk+1,Kmm)
END_2D
ENDIF
! DO_3D( 0, 0, 0, 0, 1, jpkm1 )
! edmfa(ji,jj,jk) = 0._wp
! edmfb(ji,jj,jk) = -edmfm(ji,jj,jk ) / e3w(ji,jj,jk+1,Kmm)
! edmfc(ji,jj,jk) = edmfm(ji,jj,jk+1) / e3w(ji,jj,jk+1,Kmm)
! END_3D
!!gm BUG : level jpk never used in the inversion
! DO_2D( 0, 0, 0, 0 )
! edmfa(ji,jj,jpk) = -edmfm(ji,jj,jpk-1) / e3w(ji,jj,jpk,Kmm)
! edmfb(ji,jj,jpk) = edmfm(ji,jj,jpk ) / e3w(ji,jj,jpk,Kmm)
! edmfc(ji,jj,jpk) = 0._wp
! END_2D
!!
!!gm BUG ??? below e3t_Kmm should be used ?
!! or even no multiplication by e3t unless there is a bug in wi calculation
!!
! DO_3D( 0, 0, 0, 0, 1, jpkm1 )
!!gm edmfa = 0._wp except at jpk which is not used ==>> zdiagi update is useless !
! zdiagi(ji,jj,jk) = zdiagi(ji,jj,jk) + e3t(ji,jj,jk,Kaa) * p2dt *edmfa(ji,jj,jk)
! zdiags(ji,jj,jk) = zdiags(ji,jj,jk) + e3t(ji,jj,jk,Kaa) * p2dt *edmfc(ji,jj,jk)
! zdiagd(ji,jj,jk) = zdiagd(ji,jj,jk) + e3t(ji,jj,jk,Kaa) * p2dt *edmfb(ji,jj,jk)
! END_3D
!!gm CALL diag_mfc( zwi, zwd, zws, rDt, Kaa )
!!gm SUBROUTINE diag_mfc( zdiagi, zdiagd, zdiags, p2dt, Kaa )
!
!! Matrix inversion from the first level
!!----------------------------------------------------------------------
! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk )
!
! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 )
! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 )
! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 )
! ( ... )( ... ) ( ... )
! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk )
!
! m is decomposed in the product of an upper and lower triangular matrix.
! The 3 diagonal terms are in 3d arrays: zwd, zws, zwi.
! Suffices i,s and d indicate "inferior" (below diagonal), diagonal
! and "superior" (above diagonal) components of the tridiagonal system.
! The solution will be in the 4d array pta.
! The 3d array zwt is used as a work space array.
! En route to the solution pt(:,:,:,:,Kaa) is used a to evaluate the rhs and then
! used as a work space array: its value is modified.
!
DO_1Di( 0, 0 ) !* 1st recurrence: Tk = Dk - Ik Sk-1 / Tk-1 (increasing k) ! done one for all passive tracers (so included in the IF instruction)
zwt(ji,1) = zwd(ji,1)
END_1D
DO_2Dik( 0, 0, 2, jpkm1, 1 )
zwt(ji,jk) = zwd(ji,jk) - zwi(ji,jk) * zws(ji,jk-1) / zwt(ji,jk-1)
END_2D
!
ENDIF ENDIF
! !
! Diagonal, lower (i), upper (s) (including the bottom boundary condition since avt is masked) IF( ln_zdfmfc ) THEN ! add Mass Flux to the RHS
IF( ln_zad_Aimp ) THEN ! Adaptive implicit vertical advection DO_2Dik( 0, 0, 1, jpkm1, 1 )
DO_3D( 0, 0, 0, 0, 1, jpkm1 ) pt(ji,jj,jk,jn,Krhs) = pt(ji,jj,jk,jn,Krhs) + edmftra(ji,jj,jk,jn)
zzwi = - p2dt * zwt(ji,jj,jk ) / e3w(ji,jj,jk ,Kmm) END_2D
zzws = - p2dt * zwt(ji,jj,jk+1) / e3w(ji,jj,jk+1,Kmm) !!gm CALL rhs_mfc( pt(:,:,:,jn,Krhs), jn )
zwd(ji,jj,jk) = e3t(ji,jj,jk,Kaa) - zzwi - zzws &
& + p2dt * ( MAX( wi(ji,jj,jk ) , 0._wp ) - MIN( wi(ji,jj,jk+1) , 0._wp ) )
zwi(ji,jj,jk) = zzwi + p2dt * MIN( wi(ji,jj,jk ) , 0._wp )
zws(ji,jj,jk) = zzws - p2dt * MAX( wi(ji,jj,jk+1) , 0._wp )
END_3D
ELSE
DO_3D( 0, 0, 0, 0, 1, jpkm1 )
zwi(ji,jj,jk) = - p2dt * zwt(ji,jj,jk ) / e3w(ji,jj,jk,Kmm)
zws(ji,jj,jk) = - p2dt * zwt(ji,jj,jk+1) / e3w(ji,jj,jk+1,Kmm)
zwd(ji,jj,jk) = e3t(ji,jj,jk,Kaa) - zwi(ji,jj,jk) - zws(ji,jj,jk)
END_3D
ENDIF ENDIF
! !
! Modification of diagonal to add MF scheme DO_1Di( 0, 0 ) !* 2nd recurrence: Zk = Yk - Ik / Tk-1 Zk-1
IF ( ln_zdfmfc ) THEN pt(ji,jj,1,jn,Kaa) = e3t(ji,jj,1,Kbb) * pt(ji,jj,1,jn,Kbb ) &
CALL diag_mfc( zwi, zwd, zws, p2dt, Kaa ) & + rDt * e3t(ji,jj,1,Kmm) * pt(ji,jj,1,jn,Krhs)
END IF END_1D
! DO_2Dik( 0, 0, 2, jpkm1, 1 )
!! Matrix inversion from the first level zrhs = e3t(ji,jj,jk,Kbb) * pt(ji,jj,jk,jn,Kbb ) &
!!---------------------------------------------------------------------- & + rDt * e3t(ji,jj,jk,Kmm) * pt(ji,jj,jk,jn,Krhs) ! zrhs=right hand side
! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) pt(ji,jj,jk,jn,Kaa) = zrhs - zwi(ji,jk) / zwt(ji,jk-1) * pt(ji,jj,jk-1,jn,Kaa)
!
! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 )
! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 )
! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 )
! ( ... )( ... ) ( ... )
! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk )
!
! m is decomposed in the product of an upper and lower triangular matrix.
! The 3 diagonal terms are in 3d arrays: zwd, zws, zwi.
! Suffices i,s and d indicate "inferior" (below diagonal), diagonal
! and "superior" (above diagonal) components of the tridiagonal system.
! The solution will be in the 4d array pta.
! The 3d array zwt is used as a work space array.
! En route to the solution pt(:,:,:,:,Kaa) is used a to evaluate the rhs and then
! used as a work space array: its value is modified.
!
DO_2D( 0, 0, 0, 0 ) !* 1st recurrence: Tk = Dk - Ik Sk-1 / Tk-1 (increasing k) ! done one for all passive tracers (so included in the IF instruction)
zwt(ji,jj,1) = zwd(ji,jj,1)
END_2D END_2D
DO_3D( 0, 0, 0, 0, 2, jpkm1 )
zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwt(ji,jj,jk-1)
END_3D
! !
ENDIF DO_1Di( 0, 0 ) !* 3d recurrence: Xk = (Zk - Sk Xk+1 ) / Tk (result is the after tracer)
! pt(ji,jj,jpkm1,jn,Kaa) = pt(ji,jj,jpkm1,jn,Kaa) / zwt(ji,jpkm1) * tmask(ji,jj,jpkm1)
! Modification of rhs to add MF scheme END_1D
IF ( ln_zdfmfc ) THEN DO_2Dik( 0, 0, jpk-2, 1, -1 )
CALL rhs_mfc( pt(:,:,:,jn,Krhs), jn ) pt(ji,jj,jk,jn,Kaa) = ( pt(ji,jj,jk,jn,Kaa) - zws(ji,jk) * pt(ji,jj,jk+1,jn,Kaa) ) &
END IF & / zwt(ji,jk) * tmask(ji,jj,jk)
! END_2D
DO_2D( 0, 0, 0, 0 ) !* 2nd recurrence: Zk = Yk - Ik / Tk-1 Zk-1 ! ! ================= !
pt(ji,jj,1,jn,Kaa) = e3t(ji,jj,1,Kbb) * pt(ji,jj,1,jn,Kbb) & END DO ! tracer loop !
& + p2dt * e3t(ji,jj,1,Kmm) * pt(ji,jj,1,jn,Krhs)
END_2D
DO_3D( 0, 0, 0, 0, 2, jpkm1 )
zrhs = e3t(ji,jj,jk,Kbb) * pt(ji,jj,jk,jn,Kbb) &
& + p2dt * e3t(ji,jj,jk,Kmm) * pt(ji,jj,jk,jn,Krhs) ! zrhs=right hand side
pt(ji,jj,jk,jn,Kaa) = zrhs - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) * pt(ji,jj,jk-1,jn,Kaa)
END_3D
!
DO_2D( 0, 0, 0, 0 ) !* 3d recurrence: Xk = (Zk - Sk Xk+1 ) / Tk (result is the after tracer)
pt(ji,jj,jpkm1,jn,Kaa) = pt(ji,jj,jpkm1,jn,Kaa) / zwt(ji,jj,jpkm1) * tmask(ji,jj,jpkm1)
END_2D
DO_3DS( 0, 0, 0, 0, jpk-2, 1, -1 )
pt(ji,jj,jk,jn,Kaa) = ( pt(ji,jj,jk,jn,Kaa) - zws(ji,jj,jk) * pt(ji,jj,jk+1,jn,Kaa) ) &
& / zwt(ji,jj,jk) * tmask(ji,jj,jk)
END_3D
! ! ================= ! ! ! ================= !
END DO ! end tracer loop ! END_1D ! i-k slices loop !
! ! ================= ! ! ! ================= !
END SUBROUTINE tra_zdf_imp END SUBROUTINE tra_zdf_imp
......
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