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C $Header: /u/gcmpack/MITgcm/pkg/autodiff/global_sum_ad.F,v 1.7 2008/08/02 23:16:58 jmc Exp $ |
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C $Name: $ |
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|
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C-- File global_adsum.F: Routines that perform adjoint of |
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C global sum on an array of thread values. |
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C Contents |
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C o global_adsum_tile_rl |
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C o global_adsum_tile_rs <- not yet coded |
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#include "AUTODIFF_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: GLOBAL_ADSUM_TILE_RL |
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|
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C !INTERFACE: |
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SUBROUTINE GLOBAL_ADSUM_TILE_RL( |
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O adPhiTile, |
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I adsumPhi, |
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I myThid ) |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE GLOBAL\_ADSUM\_TILE\_RL |
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C | o Handle sum for _RL data. |
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C *==========================================================* |
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C | Apply sum on an array of one value per tile |
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C | and operate over all tiles & all the processes. |
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C *==========================================================* |
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|
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IMPLICIT NONE |
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C == Global data == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "EESUPPORT.h" |
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#include "GLOBAL_SUM.h" |
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|
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C == Routine arguments == |
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C phiTile :: Input array with one value per tile |
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C sumPhi :: Result of sum. |
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C myThid :: My thread id. |
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_RL adphiTile(nSx,nSy) |
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_RL adsumPhi |
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INTEGER myThid |
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CEOP |
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|
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C == Local variables == |
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C bi,bj :: tile indices |
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C mpiRC :: MPI return code |
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INTEGER bi,bj |
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Real*8 tmp |
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#ifdef ALLOW_USE_MPI |
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INTEGER mpiRC |
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#endif /* ALLOW_USE_MPI */ |
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|
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C-- Can not start until everyone is ready |
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_BARRIER |
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|
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C-- broadcast to all processes |
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_BEGIN_MASTER( myThid ) |
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|
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tmp = adsumPhi |
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|
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#ifdef ALLOW_USE_MPI |
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#ifndef ALWAYS_USE_MPI |
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IF ( usingMPI ) THEN |
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#endif |
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CALL MPI_Bcast( tmp, 1, MPI_DOUBLE_PRECISION, 0, |
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& MPI_COMM_WORLD, mpiRC ) |
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#ifndef ALWAYS_USE_MPI |
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ENDIF |
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#endif |
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#endif /* ALLOW_USE_MPI */ |
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|
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shareBufGSR8(1,1) = tmp |
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|
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_END_MASTER( myThid ) |
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C-- |
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_BARRIER |
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|
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C-- every thread takes its adjoint sum |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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adphiTile(bi,bj) = shareBufGSR8(1,1) |
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ENDDO |
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ENDDO |
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C-- reset input to zero (jmc: is it right ? necessary ?) |
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c adsumPhi = 0. |
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|
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RETURN |
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END |
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