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exch_rx_recv_get_y.template
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exch_rx_recv_get_y.template
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C $Header: /u/gcmpack/MITgcm/eesupp/src/exch_rx_recv_get_y.template,v 1.2 2001/09/21 03:55:50 cnh Exp $
C $Name: $
#include "CPP_EEOPTIONS.h"
CBOP
C !ROUTINE: EXCH_RX_RECV_GET_Y
C !INTERFACE:
SUBROUTINE EXCH_RX_RECV_GET_Y( array,
I myOLw, myOLe, myOLs, myOLn, myNz,
I exchWidthX, exchWidthY,
I theSimulationMode, theCornerMode, myThid )
IMPLICIT NONE
C !DESCRIPTION:
C *==========================================================*
C | SUBROUTINE RECV_GET_Y
C | o "Send" or "put" Y edges for RX array.
C *==========================================================*
C | Routine that invokes actual message passing send or
C | direct "put" of data to update X faces of an XY[R] array.
C *==========================================================*
C !USES:
C == Global variables ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "EESUPPORT.h"
#include "EXCH.h"
C !INPUT/OUTPUT PARAMETERS:
C == Routine arguments ==
C array :: Array with edges to exchange.
C myOLw :: West, East, North and South overlap region sizes.
C myOLe
C myOLn
C myOLs
C exchWidthX :: Width of data region exchanged.
C exchWidthY
C theSimulationMode :: Forward or reverse mode exchange ( provides
C support for adjoint integration of code. )
C theCornerMode :: Flag indicating whether corner updates are
C needed.
C myThid :: Thread number of this instance of S/R EXCH...
C eBl :: Edge buffer level
INTEGER myOLw
INTEGER myOLe
INTEGER myOLs
INTEGER myOLn
INTEGER myNz
_RX array(1-myOLw:sNx+myOLe,
& 1-myOLs:sNy+myOLn,
& myNZ, nSx, nSy)
INTEGER exchWidthX
INTEGER exchWidthY
INTEGER theSimulationMode
INTEGER theCornerMode
INTEGER myThid
C !LOCAL VARIABLES:
C == Local variables ==
C I, J, K, iMin, iMax, iB :: Loop counters and extents
C bi, bj
C biS, bjS :: South tile indices
C biN, bjN :: North tile indices
C eBl :: Current exchange buffer level
C theProc, theTag, theType, :: Variables used in message building
C theSize
C southCommMode :: Working variables holding type
C northCommMode of communication a particular
C tile face uses.
C spinCount :: Exchange statistics counter
C mpiStatus :: MPI error code
INTEGER I, J, K, iMin, iMax, jMin, jMax, iB, iB0
INTEGER bi, bj, biS, bjS, biN, bjN
INTEGER eBl
INTEGER southCommMode
INTEGER northCommMode
INTEGER spinCount
#ifdef ALLOW_USE_MPI
INTEGER theProc, theTag, theType, theSize
INTEGER mpiStatus(MPI_STATUS_SIZE,4), mpiRc
#endif
CEOP
C-- Under a "put" scenario we
C-- i. set completetion signal for buffer we put into.
C-- ii. wait for completetion signal indicating data has been put in
C-- our buffer.
C-- Under a messaging mode we "receive" the message.
C-- Under a "get" scenario we
C-- i. Check that the data is ready.
C-- ii. Read the data.
C-- iii. Set data read flag + memory sync.
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
ebL = exchangeBufLevel(1,bi,bj)
southCommMode = _tileCommModeS(bi,bj)
northCommMode = _tileCommModeN(bi,bj)
biN = _tileBiN(bi,bj)
bjN = _tileBjN(bi,bj)
biS = _tileBiS(bi,bj)
bjS = _tileBjS(bi,bj)
IF ( southCommMode .EQ. COMM_MSG ) THEN
#ifdef ALLOW_USE_MPI
#ifndef ALWAYS_USE_MPI
IF ( usingMPI ) THEN
#endif
theProc = tilePidS(bi,bj)
theTag = _tileTagRecvS(bi,bj)
theType = MPI_DOUBLE_PRECISION
theSize = sNx*exchWidthY*myNz
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS )
& theSize = (sNx+2*exchWidthX)*exchWidthY*myNz
CALL MPI_Recv( southRecvBuf_RX(1,eBl,bi,bj), theSize, theType,
& theProc, theTag, MPI_COMM_MODEL,
& mpiStatus, mpiRc )
#ifndef ALWAYS_USE_MPI
ENDIF
#endif
#endif /* ALLOW_USE_MPI */
ENDIF
IF ( northCommMode .EQ. COMM_MSG ) THEN
#ifdef ALLOW_USE_MPI
#ifndef ALWAYS_USE_MPI
IF ( usingMPI ) THEN
#endif
theProc = tilePidN(bi,bj)
theTag = _tileTagRecvN(bi,bj)
theType = MPI_DOUBLE_PRECISION
theSize = sNx*exchWidthY*myNz
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS )
& theSize = (sNx+2*exchWidthX)*exchWidthY*myNz
CALL MPI_Recv( northRecvBuf_RX(1,eBl,bi,bj), theSize, theType,
& theProc, theTag, MPI_COMM_MODEL,
& mpiStatus, mpiRc )
#ifndef ALWAYS_USE_MPI
ENDIF
#endif
#endif /* ALLOW_USE_MPI */
ENDIF
ENDDO
ENDDO
C-- Wait for buffers I am going read to be ready.
IF ( exchUsesBarrier ) THEN
C o On some machines ( T90 ) use system barrier rather than spinning.
CALL BARRIER( myThid )
ELSE
C o Spin waiting for completetion flag. This avoids a global-lock
C i.e. we only lock waiting for data that we need.
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
ebL = exchangeBufLevel(1,bi,bj)
southCommMode = _tileCommModeS(bi,bj)
northCommMode = _tileCommModeN(bi,bj)
spinCount = 0
10 CONTINUE
CALL FOOL_THE_COMPILER
spinCount = spinCount+1
C IF ( myThid .EQ. 1 .AND. spinCount .GT. _EXCH_SPIN_LIMIT ) THEN
C STOP ' S/R EXCH_RECV_GET_Y: spinCount .GT. _EXCH_SPIN_LIMIT'
C ENDIF
IF ( southRecvAck(eBl,bi,bj) .EQ. 0. ) GOTO 10
IF ( northRecvAck(eBl,bi,bj) .EQ. 0. ) GOTO 10
C Clear requests
southRecvAck(eBl,bi,bj) = 0.
northRecvAck(eBl,bi,bj) = 0.
C Update statistics
IF ( exchCollectStatistics ) THEN
exchRecvYExchCount(1,bi,bj) = exchRecvYExchCount(1,bi,bj)+1
exchRecvYSpinCount(1,bi,bj) =
& exchRecvYSpinCount(1,bi,bj)+spinCount
exchRecvYSpinMax(1,bi,bj) =
& MAX(exchRecvYSpinMax(1,bi,bj),spinCount)
exchRecvYSpinMin(1,bi,bj) =
& MIN(exchRecvYSpinMin(1,bi,bj),spinCount)
ENDIF
IF ( exchNReqsY(1,bi,bj) .GT. 0 ) THEN
#ifdef ALLOW_USE_MPI
#ifndef ALWAYS_USE_MPI
IF ( usingMPI ) THEN
#endif
CALL MPI_Waitall( exchNReqsY(1,bi,bj), exchReqIdY(1,1,bi,bj),
& mpiStatus, mpiRC )
#ifndef ALWAYS_USE_MPI
ENDIF
#endif
#endif /* ALLOW_USE_MPI */
ENDIF
C Clear outstanding requests counter
exchNReqsY(1,bi,bj) = 0
ENDDO
ENDDO
ENDIF
C-- Read from the buffers
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
ebL = exchangeBufLevel(1,bi,bj)
biN = _tileBiN(bi,bj)
bjN = _tileBjN(bi,bj)
biS = _tileBiS(bi,bj)
bjS = _tileBjS(bi,bj)
southCommMode = _tileCommModeS(bi,bj)
northCommMode = _tileCommModeN(bi,bj)
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN
iMin = 1-exchWidthX
iMax = sNx+exchWidthX
ELSE
iMin = 1
iMax = sNx
ENDIF
IF ( _theSimulationMode .EQ. FORWARD_SIMULATION ) THEN
jMin = sNy+1
jMax = sNy+exchWidthY
iB0 = 0
IF ( northCommMode .EQ. COMM_PUT
& .OR. northCommMode .EQ. COMM_MSG ) THEN
iB = 0
DO K=1,myNz
DO J=jMin,jMax
DO I=iMin,iMax
iB = iB + 1
array(I,J,K,bi,bj) = northRecvBuf_RX(iB,eBl,bi,bj)
ENDDO
ENDDO
ENDDO
ELSEIF ( northCommMode .EQ. COMM_GET ) THEN
DO K=1,myNz
iB = iB0
DO J=jMin,jMax
iB = iB+1
DO I=iMin,iMax
array(I,J,K,bi,bj) = array(I,iB,K,biN,bjN)
ENDDO
ENDDO
ENDDO
ENDIF
ELSEIF ( _theSimulationMode .EQ. REVERSE_SIMULATION ) THEN
jMin = sNy-exchWidthY+1
jMax = sNy
iB0 = 1-exchWidthY-1
IF ( northCommMode .EQ. COMM_PUT
& .OR. northCommMode .EQ. COMM_MSG ) THEN
iB = 0
DO K=1,myNz
DO J=jMin,jMax
DO I=iMin,iMax
iB = iB + 1
array(I,J,K,bi,bj) =
& array(I,J,K,bi,bj)+northRecvBuf_RX(iB,eBl,bi,bj)
ENDDO
ENDDO
ENDDO
ELSEIF ( northCommMode .EQ. COMM_GET ) THEN
DO K=1,myNz
iB = iB0
DO J=jMin,jMax
iB = iB+1
DO I=iMin,iMax
array(I,J,K,bi,bj) =
& array(I,J,K,bi,bj)+array(I,iB,K,biN,bjN)
ENDDO
ENDDO
ENDDO
ENDIF
ENDIF
IF ( _theSimulationMode .EQ. FORWARD_SIMULATION ) THEN
jMin = 1-exchWidthY
jMax = 0
iB0 = sNy-exchWidthY
IF ( southCommMode .EQ. COMM_PUT
& .OR. southCommMode .EQ. COMM_MSG ) THEN
iB = 0
DO K=1,myNz
DO J=jMin,jMax
DO I=iMin,iMax
iB = iB + 1
array(I,J,K,bi,bj) = southRecvBuf_RX(iB,eBl,bi,bj)
ENDDO
ENDDO
ENDDO
ELSEIF ( southCommMode .EQ. COMM_GET ) THEN
DO K=1,myNz
iB = iB0
DO J=jMin,jMax
iB = iB+1
DO I=iMin,iMax
array(I,J,K,bi,bj) = array(I,iB,K,biS,bjS)
ENDDO
ENDDO
ENDDO
ENDIF
ELSEIF ( _theSimulationMode .EQ. REVERSE_SIMULATION ) THEN
jMin = 1
jMax = 1+exchWidthY-1
iB0 = sNy
IF ( southCommMode .EQ. COMM_PUT
& .OR. southCommMode .EQ. COMM_MSG ) THEN
iB = 0
DO K=1,myNz
DO J=jMin,jMax
DO I=iMin,iMax
iB = iB + 1
array(I,J,K,bi,bj) =
& array(I,J,K,bi,bj)+southRecvBuf_RX(iB,eBl,bi,bj)
ENDDO
ENDDO
ENDDO
ELSEIF ( southCommMode .EQ. COMM_GET ) THEN
DO K=1,myNz
iB = iB0
DO J=jMin,jMax
iB = iB+1
DO I=iMin,iMax
array(I,J,K,bi,bj) =
& array(I,J,K,bi,bj)+array(I,iB,K,biS,bjS)
ENDDO
ENDDO
ENDDO
ENDIF
ENDIF
ENDDO
ENDDO
RETURN
END