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C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_send_rx1.template,v 1.12 2010/04/23 20:21:07 jmc Exp $ |
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C $Name: $ |
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|
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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_SEND_RX1 |
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|
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C !INTERFACE: |
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SUBROUTINE EXCH2_SEND_RX1 ( |
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I thisTile, nN, |
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I e2BufrRecSize, |
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I iBufr, |
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I e2Bufr1_RX, |
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O e2_msgHandle, |
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I commSetting, myThid ) |
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|
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C !DESCRIPTION: |
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C Scalar field (1 component) Exchange: |
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C Send buffer to the target Process. |
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C buffer has been previously filled with interior data point |
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C corresponding to the target-neighbour-edge 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 "EESUPPORT.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 thisTile :: sending tile Id. number |
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C nN :: Neighbour entry that we are processing |
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C e2BufrRecSize :: Number of elements in each entry 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 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 thisTile, nN |
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INTEGER e2BufrRecSize |
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INTEGER iBufr |
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_RX e2Bufr1_RX( e2BufrRecSize ) |
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INTEGER e2_msgHandle(1) |
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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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#ifdef ALLOW_USE_MPI |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C tgT :: Target tile |
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INTEGER tgT |
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|
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C MPI setup |
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INTEGER theTag, theType, theHandle |
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INTEGER sProc, tProc, mpiRc |
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#ifdef W2_E2_DEBUG_ON |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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#endif |
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|
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tgT = exch2_neighbourId(nN, thisTile ) |
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|
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C Do data transport depending on communication mechanism between |
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C source and target tile |
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IF ( commSetting .EQ. 'M' ) THEN |
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C Setup MPI stuff here |
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theTag = (thisTile-1)*W2_maxNeighbours + nN |
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tProc = W2_tileProc(tgT)-1 |
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sProc = W2_tileProc(thisTile)-1 |
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theType = _MPI_TYPE_RX |
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#ifdef W2_E2_DEBUG_ON |
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WRITE(msgBuf,'(A,I5,A,I5,A)') |
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& ' SEND FROM TILE=', thisTile, ' (proc =',sProc,')' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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I SQUEEZE_RIGHT, myThid) |
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WRITE(msgBuf,'(A,I5,A,I5,A)') |
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& ' TO TILE=', tgT ' (proc =',tProc,')' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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I SQUEEZE_RIGHT, myThid) |
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WRITE(msgBuf,'(A,I10)') ' TAG=', theTag |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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I SQUEEZE_RIGHT, myThid) |
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WRITE(msgBuf,'(A,I4)') ' NEL=', iBufr |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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I SQUEEZE_RIGHT, myThid) |
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#endif /* W2_E2_DEBUG_ON */ |
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CALL MPI_Isend( e2Bufr1_RX, iBufr, theType, |
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I tProc, theTag, MPI_COMM_MODEL, |
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O theHandle, mpiRc ) |
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C Store MPI_Wait token in messageHandle. |
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e2_msgHandle(1) = theHandle |
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ENDIF |
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#endif /* ALLOW_USE_MPI */ |
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|
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RETURN |
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END |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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CEH3 ;;; Local Variables: *** |
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CEH3 ;;; mode:fortran *** |
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CEH3 ;;; End: *** |
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