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C $Header: /u/gcmpack/MITgcm/eesupp/src/cumulsum_z_tile.F,v 1.2 2011/07/09 22:13:44 jmc Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_EEOPTIONS.h" |
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|
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C-- File cumulsum_z_tile.F: Routines that perform cumulated sum |
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C on a tiled array, corner grid-cell location |
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C Contents |
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C o CUMULSUM_Z_TILE_RL |
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C o CUMULSUM_Z_TILE_RS <- not yet coded |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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C !ROUTINE: CUMULSUM_Z_TILE_RL |
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|
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C !INTERFACE: |
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SUBROUTINE CUMULSUM_Z_TILE_RL( |
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O psiZ, psiLoc, |
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I dPsiX, dPsiY, myThid ) |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE CUMULSUM\_Z\_TILE\_RL |
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C | o Handle cumulated sum for _RL tile data. |
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C *==========================================================* |
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C | Cumulate sum on tiled array, corner grid-cell location: |
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C | Starts from 1rst tile and, going through all tiles & all |
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C | the processes, add increment in both directions |
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C *==========================================================* |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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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 "CUMULSUM.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C psiZ :: results of cumulated sum, corresponds to tile South-East corner |
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C psiLoc :: cumulated sum at special locations |
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C dPsiX :: tile increment in X direction |
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C dPsiY :: tile increment in Y direction |
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C myThid :: my Thread Id. number |
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_RL psiZ (nSx,nSy) |
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_RL psiLoc(2) |
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_RL dPsiX (nSx,nSy) |
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_RL dPsiY (nSx,nSy) |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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#ifndef ALLOW_EXCH2 |
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C == Local variables == |
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C bi,bj :: tile indices |
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C- type declaration of: loc[1,2]Buf and shareBufCS[1,2]_R8 : |
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C all 4 needs to have the same length as MPI_DOUBLE_PRECISION |
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INTEGER bi,bj |
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INTEGER nf |
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#ifdef ALLOW_USE_MPI |
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INTEGER biG, bjG, npe, np1 |
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INTEGER lbuf1, lbuf2, idest, itag, ready_to_receive |
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INTEGER istatus(MPI_STATUS_SIZE), ierr |
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Real*8 loc1Buf (nSx,nSy) |
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Real*8 loc2Buf(2,nSx,nSy) |
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Real*8 globalBuf(3,nSx*nPx,nSy*nPy) |
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#endif /* ALLOW_USE_MPI */ |
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#endif /* ALLOW_EXCH2 */ |
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CEOP |
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|
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#ifdef ALLOW_EXCH2 |
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CALL W2_CUMULSUM_Z_TILE_RL( |
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O psiZ, psiLoc, |
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I dPsiX, dPsiY, myThid ) |
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|
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#else /* ALLOW_EXCH2 */ |
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C-- write input into shared-buffer array |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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shareBufCS2_R8(1,bi,bj) = dPsiX(bi,bj) |
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shareBufCS2_R8(2,bi,bj) = dPsiY(bi,bj) |
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ENDDO |
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ENDDO |
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psiLoc(1) = 0. |
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psiLoc(2) = 0. |
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|
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C-- Master thread cannot start until everyone is ready: |
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CALL BAR2( myThid ) |
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_BEGIN_MASTER( myThid ) |
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|
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#ifdef ALLOW_USE_MPI |
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IF ( usingMPI ) THEN |
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|
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lbuf1 = nSx*nSy |
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lbuf2 = 2*lbuf1 |
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idest = 0 |
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itag = 0 |
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ready_to_receive = 0 |
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|
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IF ( mpiMyId.NE.0 ) THEN |
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|
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C-- All proceses except 0 wait to be polled then send local array |
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#ifndef DISABLE_MPI_READY_TO_RECEIVE |
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CALL MPI_RECV (ready_to_receive, 1, MPI_INTEGER, |
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& idest, itag, MPI_COMM_MODEL, istatus, ierr) |
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#endif |
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CALL MPI_SEND (shareBufCS2_R8, lbuf2, MPI_DOUBLE_PRECISION, |
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& idest, itag, MPI_COMM_MODEL, ierr) |
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|
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C-- All proceses except 0 receive result from process 0 |
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CALL MPI_RECV (shareBufCS1_R8, lbuf1, MPI_DOUBLE_PRECISION, |
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& idest, itag, MPI_COMM_MODEL, istatus, ierr) |
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|
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ELSE |
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|
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C-- Process 0 fills-in its local data |
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np1 = 1 |
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DO bj=1,nSy |
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DO bi=1,nSx |
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biG = (mpi_myXGlobalLo(np1)-1)/sNx+bi |
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bjG = (mpi_myYGlobalLo(np1)-1)/sNy+bj |
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globalBuf(1,biG,bjG) = shareBufCS2_R8(1,bi,bj) |
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globalBuf(2,biG,bjG) = shareBufCS2_R8(2,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Process 0 polls and receives data from each process in turn |
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DO npe = 1, numberOfProcs-1 |
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#ifndef DISABLE_MPI_READY_TO_RECEIVE |
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CALL MPI_SEND (ready_to_receive, 1, MPI_INTEGER, |
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& npe, itag, MPI_COMM_MODEL, ierr) |
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#endif |
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CALL MPI_RECV (loc2Buf, lbuf2, MPI_DOUBLE_PRECISION, |
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& npe, itag, MPI_COMM_MODEL, istatus, ierr) |
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|
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C-- Process 0 gathers the local arrays into a global array. |
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np1 = npe + 1 |
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DO bj=1,nSy |
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DO bi=1,nSx |
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biG = (mpi_myXGlobalLo(np1)-1)/sNx+bi |
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bjG = (mpi_myYGlobalLo(np1)-1)/sNy+bj |
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globalBuf(1,biG,bjG) = loc2Buf(1,bi,bj) |
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globalBuf(2,biG,bjG) = loc2Buf(2,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C-- Cumulate Sum over all tiles: |
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globalBuf(3,1,1) = 0. |
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bj = 1 |
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DO bi = 1,nSx*nPx-1 |
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globalBuf(3,1+bi,bj) = globalBuf(3,bi,bj) |
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& + globalBuf(1,bi,bj) |
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ENDDO |
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DO bj = 1,nSy*nPy-1 |
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DO bi = 1,nSx*nPx |
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globalBuf(3,bi,1+bj) = globalBuf(3,bi,bj) |
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& + globalBuf(2,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Process 0 fills-in its local data |
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np1 = 1 |
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DO bj=1,nSy |
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DO bi=1,nSx |
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biG = (mpi_myXGlobalLo(np1)-1)/sNx+bi |
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bjG = (mpi_myYGlobalLo(np1)-1)/sNy+bj |
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shareBufCS1_R8(bi,bj) = globalBuf(3,biG,bjG) |
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ENDDO |
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ENDDO |
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|
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C-- Process 0 sends result to all other processes |
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DO npe = 1, numberOfProcs-1 |
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C- fill local array with relevant portion of global array |
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np1 = npe + 1 |
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DO bj=1,nSy |
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DO bi=1,nSx |
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biG = (mpi_myXGlobalLo(np1)-1)/sNx+bi |
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bjG = (mpi_myYGlobalLo(np1)-1)/sNy+bj |
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loc1Buf(bi,bj) = globalBuf(3,biG,bjG) |
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ENDDO |
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ENDDO |
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CALL MPI_SEND (loc1Buf, lbuf1, MPI_DOUBLE_PRECISION, |
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& npe, itag, MPI_COMM_MODEL, ierr) |
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|
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ENDDO |
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|
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ENDIF |
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|
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ELSEIF (useCubedSphereExchange) THEN |
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#else /* not USE_MPI */ |
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IF (useCubedSphereExchange) THEN |
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#endif /* ALLOW_USE_MPI */ |
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|
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C-- assume 1 tile / face, from bi=1 to 6, no MPI |
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shareBufCS1_R8(1,1) = 0. |
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bj = 1 |
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DO bi = 1,nSx-1 |
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nf = 1 + MOD(1+bi,2) |
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shareBufCS1_R8(1+bi,bj) = shareBufCS1_R8(bi,bj) |
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& + shareBufCS2_R8(nf,bi,bj) |
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ENDDO |
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C- fill in missing corner: 1 = North-West corner of face 1 |
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C- 2 = South-East corner of face 2 |
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bi = 1 |
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psiLoc(1) = shareBufCS1_R8(bi,bj) + shareBufCS2_R8(2,bi,bj) |
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bi = MIN(2,nSx) |
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psiLoc(2) = shareBufCS1_R8(bi,bj) + shareBufCS2_R8(1,bi,bj) |
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|
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ELSE |
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|
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C-- Cumulate Sum over all tiles: |
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shareBufCS1_R8(1,1) = 0. |
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bj = 1 |
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DO bi = 1,nSx-1 |
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shareBufCS1_R8(1+bi,bj) = shareBufCS1_R8(bi,bj) |
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& + shareBufCS2_R8(1,bi,bj) |
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ENDDO |
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DO bj = 1,nSy-1 |
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DO bi = 1,nSx |
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shareBufCS1_R8(bi,1+bj) = shareBufCS1_R8(bi,bj) |
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& + shareBufCS2_R8(2,bi,bj) |
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ENDDO |
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ENDDO |
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|
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ENDIF |
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|
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_END_MASTER( myThid ) |
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C-- Everyone wait for Master thread to be ready |
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CALL BAR2( myThid ) |
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|
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C-- set result for every threads |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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psiZ(bi,bj) = shareBufCS1_R8(bi,bj) |
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ENDDO |
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ENDDO |
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|
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#endif /* ALLOW_EXCH2 */ |
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RETURN |
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END |
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