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C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_ad_get_rx1.template,v 1.2 2009/06/28 01:00:23 jmc Exp $ |
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C $Name: $ |
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#include "CPP_EEOPTIONS.h" |
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#include "W2_OPTIONS.h" |
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|
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CBOP 0 |
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C !ROUTINE: EXCH2_AD_GET_RX1 |
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C !INTERFACE: |
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SUBROUTINE EXCH2_AD_GET_RX1( |
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I tIlo, tIhi, tiStride, |
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I tJlo, tJhi, tjStride, |
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I tKlo, tKhi, tkStride, |
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I thisTile, nN, bi, bj, |
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I e2BufrRecSize, sizeNb, sizeBi, sizeBj, |
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O iBufr, |
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O e2Bufr1_RX, |
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U array, |
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I i1Lo, i1Hi, j1Lo, j1Hi, k1Lo, k1Hi, |
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U e2_msgHandles, |
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I commSetting, myThid ) |
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|
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C !DESCRIPTION: |
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C--------------- |
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C AD: IMPORTANT: All comments (except AD:) are taken from the Forward S/R |
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C AD: and need to be interpreted in the reverse sense: put <-> get, |
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C AD: send <-> recv, source <-> target ... |
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C--------------- |
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C Scalar field (1 component) Exchange: |
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C Get from buffer exchanged data to fill in this tile-egde overlap region. |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "W2_EXCH2_SIZE.h" |
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#include "W2_EXCH2_TOPOLOGY.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 tIlo,tIhi :: index range in I that will be filled in target "array" |
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C tIstride :: index step in I that will be filled in target "array" |
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C tJlo,tJhi :: index range in J that will be filled in target "array" |
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C tJstride :: index step in J that will be filled in target "array" |
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C tKlo,tKhi :: index range in K that will be filled in target "array" |
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C tKstride :: index step in K that will be filled in target "array" |
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C thisTile :: receiving tile Id. number |
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C nN :: Neighbour entry that we are processing |
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C bi,bj :: Indices of the receiving tile within this process |
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C :: (used to select buffer slots that are allowed). |
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C e2BufrRecSize :: Number of elements in each entry of e2Bufr1_RX |
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C sizeNb :: Second dimension of e2Bufr1_RX |
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C sizeBi :: Third dimension of e2Bufr1_RX |
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C sizeBj :: Fourth dimension of e2Bufr1_RX |
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C iBufr :: number of buffer elements to transfer |
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C e2Bufr1_RX :: Data transport buffer array. This array is used in one of |
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C :: two ways. For PUT communication the entry in the buffer |
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C :: associated with the source for this receive (determined |
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C :: from the opposing_send index) is read. |
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C :: For MSG communication the entry in the buffer associated |
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C :: with this neighbor of this tile is used as a receive |
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C :: location for loading a linear stream of bytes. |
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C array :: Target array that this receive writes to. |
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C i1Lo, i1Hi :: I coordinate bounds of target array |
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C j1Lo, j1Hi :: J coordinate bounds of target array |
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C k1Lo, k1Hi :: K coordinate bounds of target array |
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C e2_msgHandles :: Synchronization and coordination data structure used to |
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C :: coordinate access to e2Bufr1_RX or to regulate message |
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C :: buffering. In PUT communication sender will increment |
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C :: handle entry once data is ready in buffer. Receiver will |
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C :: decrement handle once data is consumed from buffer. |
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C :: For MPI MSG communication MPI_Wait uses handle to check |
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C :: Isend has cleared. This is done in routine after receives. |
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C commSetting :: Mode of communication used to exchange with this neighbor |
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C myThid :: my Thread Id. number |
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|
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INTEGER tILo, tIHi, tiStride |
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INTEGER tJLo, tJHi, tjStride |
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INTEGER tKLo, tKHi, tkStride |
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INTEGER i1Lo, i1Hi, j1Lo, j1Hi, k1Lo, k1Hi |
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INTEGER thisTile, nN, bi, bj |
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INTEGER e2BufrRecSize, sizeNb, sizeBi, sizeBj |
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INTEGER iBufr |
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_RX e2Bufr1_RX( e2BufrRecSize, sizeNb, sizeBi, sizeBj, 2 ) |
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_RX array(i1Lo:i1Hi,j1Lo:j1Hi,k1Lo:k1Hi) |
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INTEGER e2_msgHandles( 2, sizeNb, sizeBi, sizeBj ) |
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CHARACTER commSetting |
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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 == Local variables == |
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C itl,jtl,ktl :: Loop counters (this tile) |
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C soT :: Source tile Id number |
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C oNb :: Opposing send record number |
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C sNb :: buffer (source) Neighbour index to get data from |
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C sBi :: buffer (source) Tile index (for this Proc) to get data from |
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C sBj :: buffer (source) Tile index (for this Proc) to get data from |
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C sLv :: buffer (source) level index to get data from |
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C i,j :: Loop counters |
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INTEGER itl, jtl, ktl |
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INTEGER soT |
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INTEGER oNb |
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INTEGER sNb, sBi, sBj, sLv |
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INTEGER i,j |
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c CHARACTER*(MAX_LEN_MBUF) msgBuf |
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|
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soT = exch2_neighbourId( nN, thisTile ) |
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oNb = exch2_opposingSend(nN, thisTile ) |
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C Handle receive end data transport according to communication mechanism |
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C between source and target tile |
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IF ( commSetting .EQ. 'P' ) THEN |
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C AD: Need to check that buffer synchronisation token is decremented |
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C AD: before filling buffer. |
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C find the tile indices (local to this Proc) corresponding to |
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C this source tile Id "soT" |
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sLv = 1 |
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sNb = oNb |
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DO j=1,sizeBj |
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DO i=1,sizeBi |
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IF ( W2_myTileList(i,j).EQ.soT ) THEN |
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sBi = i |
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sBj = j |
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ENDIF |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_USE_MPI |
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ELSEIF ( commSetting .EQ. 'M' ) THEN |
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sLv = 2 |
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sBi = bi |
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sBj = bj |
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sNb = nN |
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#endif /* ALLOW_USE_MPI */ |
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ELSE |
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STOP 'EXCH2_AD_GET_RX1:: commSetting VALUE IS INVALID' |
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ENDIF |
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|
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iBufr = 0 |
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DO ktl=tKlo,tKhi,tKStride |
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DO jtl=tJLo, tJHi, tjStride |
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DO itl=tILo, tIHi, tiStride |
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C Read from e2Bufr1_RX(iBufr,sNb,sBi,sBj,sLv) |
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iBufr = iBufr+1 |
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e2Bufr1_RX(iBufr,sNb,sBi,sBj,sLv) = array(itl,jtl,ktl) |
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array(itl,jtl,ktl) = 0. |
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ENDDO |
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ENDDO |
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ENDDO |
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RETURN |
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END |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CEH3 ;;; Local Variables: *** |
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CEH3 ;;; mode:fortran *** |
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CEH3 ;;; End: *** |
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