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C $Header: /u/u0/gcmpack/MITgcm/eesupp/src/exch_rx_send_put_x.template,v 1.5 2005/11/09 17:22:08 cnh Exp $ |
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C $Name: $ |
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#include "CPP_EEOPTIONS.h" |
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|
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CBOP |
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|
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C !ROUTINE: EXCH_RX_SEND_PUT_X |
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|
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C !INTERFACE: |
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SUBROUTINE EXCH_RX_SEND_PUT_X( array, |
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I myOLw, myOLe, myOLs, myOLn, myNz, |
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I exchWidthX, exchWidthY, |
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I thesimulationMode, thecornerMode, myThid ) |
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IMPLICIT NONE |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE EXCH_RX_SEND_PUT_X |
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C | o "Send" or "put" X edges for RX array. |
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C *==========================================================* |
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C | Routine that invokes actual message passing send or |
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C | direct "put" of data to update X faces of an XY[R] array. |
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C *==========================================================* |
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|
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C !USES: |
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C == Global variables == |
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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 "EXCH.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 array :: Array with edges to exchange. |
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C myOLw :: West, East, North and South overlap region sizes. |
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C myOLe |
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C myOLn |
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C myOLs |
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C exchWidthX :: Width of data region exchanged. |
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C exchWidthY |
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C theSimulationMode :: Forward or reverse mode exchange ( provides |
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C support for adjoint integration of code. ) |
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C theCornerMode :: Flag indicating whether corner updates are |
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C needed. |
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C myThid :: Thread number of this instance of S/R EXCH... |
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C eBl :: Edge buffer level |
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INTEGER myOLw |
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INTEGER myOLe |
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INTEGER myOLs |
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INTEGER myOLn |
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INTEGER myNz |
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_RX array(1-myOLw:sNx+myOLe, |
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& 1-myOLs:sNy+myOLn, |
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& myNZ, nSx, nSy) |
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INTEGER exchWidthX |
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INTEGER exchWidthY |
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INTEGER theSimulationMode |
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INTEGER theCornerMode |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C I, J, K, iMin, iMax, iB :: Loop counters and extents |
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C bi, bj |
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C biW, bjW :: West tile indices |
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C biE, bjE :: East tile indices |
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C eBl :: Current exchange buffer level |
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C theProc, theTag, theType, :: Variables used in message building |
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C theSize |
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C westCommMode :: Working variables holding type |
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C eastCommMode of communication a particular |
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C tile face uses. |
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INTEGER I, J, K, iMin, iMax, iB |
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INTEGER bi, bj, biW, bjW, biE, bjE |
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INTEGER eBl |
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INTEGER westCommMode |
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INTEGER eastCommMode |
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|
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#ifdef ALLOW_USE_MPI |
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INTEGER theProc, theTag, theType, theSize, mpiRc |
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#endif |
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C-- Write data to exchange buffer |
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C Various actions are possible depending on the communication mode |
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C as follows: |
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C Mode Action |
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C -------- --------------------------- |
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C COMM_NONE Do nothing |
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C |
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C COMM_MSG Message passing communication ( e.g. MPI ) |
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C Fill west send buffer from this tile. |
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C Send data with tag identifying tile and direction. |
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C Fill east send buffer from this tile. |
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C Send data with tag identifying tile and direction. |
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C |
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C COMM_PUT "Put" communication ( UMP_, shmemput, etc... ) |
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C Fill east receive buffer of west-neighbor tile |
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C Fill west receive buffer of east-neighbor tile |
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C Sync. memory |
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C Write data-ready Ack for east edge of west-neighbor |
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C tile |
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C Write data-ready Ack for west edge of east-neighbor |
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C tile |
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C Sync. memory |
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C |
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CEOP |
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|
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INTEGER myBxLoSave(MAX_NO_THREADS) |
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INTEGER myBxHiSave(MAX_NO_THREADS) |
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INTEGER myByLoSave(MAX_NO_THREADS) |
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INTEGER myByHiSave(MAX_NO_THREADS) |
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LOGICAL doingSingleThreadedComms |
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|
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doingSingleThreadedComms = .FALSE. |
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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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C Set default behavior to have MPI comms done by a single thread. |
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C Most MPI implementations don't support concurrent comms from |
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C several threads. |
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IF ( nThreads .GT. 1 ) THEN |
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_BARRIER |
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_BEGIN_MASTER( myThid ) |
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DO I=1,nThreads |
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myBxLoSave(I) = myBxLo(I) |
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myBxHiSave(I) = myBxHi(I) |
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myByLoSave(I) = myByLo(I) |
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myByHiSave(I) = myByHi(I) |
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ENDDO |
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C Comment out loop below and myB[xy][Lo|Hi](1) settings below |
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C if you want to get multi-threaded MPI comms. |
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DO I=1,nThreads |
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myBxLo(I) = 0 |
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myBxHi(I) = -1 |
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myByLo(I) = 0 |
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myByHi(I) = -1 |
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ENDDO |
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myBxLo(1) = 1 |
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myBxHi(1) = nSx |
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myByLo(1) = 1 |
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myByHi(1) = nSy |
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doingSingleThreadedComms = .TRUE. |
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_END_MASTER( myThid ) |
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_BARRIER |
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ENDIF |
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#ifndef ALWAYS_USE_MPI |
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ENDIF |
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#endif |
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#endif |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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|
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ebL = exchangeBufLevel(1,bi,bj) |
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westCommMode = _tileCommModeW(bi,bj) |
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eastCommMode = _tileCommModeE(bi,bj) |
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biE = _tileBiE(bi,bj) |
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bjE = _tileBjE(bi,bj) |
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biW = _tileBiW(bi,bj) |
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bjW = _tileBjW(bi,bj) |
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|
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C o Send or Put west edge |
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c >>>>>>>>>>>>>>>>>>> <<<<<<<<<<<<<<<<<<< |
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c >>>>>>>>>>>>>>>>>>> FORWARD RUN <<<<<<<<<<<<<<<<<<< |
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c >>>>>>>>>>>>>>>>>>> <<<<<<<<<<<<<<<<<<< |
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|
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IF ( _theSimulationMode .EQ. FORWARD_SIMULATION ) THEN |
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iMin = 1 |
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iMax = 1+exchWidthX-1 |
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IF ( westCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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westSendBuf_RX(iB,eBl,bi,bj) = array(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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C Send the data |
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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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theProc = tilePidW(bi,bj) |
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theTag = _tileTagSendW(bi,bj) |
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theSize = iB |
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theType = _MPI_TYPE_RX |
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exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
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CALL MPI_Isend(westSendBuf_RX(1,eBl,bi,bj), theSize, theType, |
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& theProc, theTag, MPI_COMM_MODEL, |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), 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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eastRecvAck(eBl,biW,bjW) = 1. |
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ELSEIF ( westCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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eastRecvBuf_RX(iB,eBl,biW,bjW) = array(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSEIF ( westCommMode .NE. COMM_NONE |
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& .AND. westCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commW mode.' |
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ENDIF |
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|
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C o Send or Put east edge |
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iMin = sNx-exchWidthX+1 |
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iMax = sNx |
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IF ( eastCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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eastSendBuf_RX(iB,eBl,bi,bj) = array(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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C Send the data |
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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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theProc = tilePidE(bi,bj) |
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theTag = _tileTagSendE(bi,bj) |
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theSize = iB |
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theType = _MPI_TYPE_RX |
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exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
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CALL MPI_Isend(eastSendBuf_RX(1,eBl,bi,bj), theSize, theType, |
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& theProc, theTag, MPI_COMM_MODEL, |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), 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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westRecvAck(eBl,biE,bjE) = 1. |
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ELSEIF ( eastCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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westRecvBuf_RX(iB,eBl,biE,bjE) = array(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSEIF ( eastCommMode .NE. COMM_NONE |
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& .AND. eastCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commE mode.' |
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ENDIF |
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c >>>>>>>>>>>>>>>>>>> <<<<<<<<<<<<<<<<<<< |
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c >>>>>>>>>>>>>>>>>>> ADJOINT RUN <<<<<<<<<<<<<<<<<<< |
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c >>>>>>>>>>>>>>>>>>> <<<<<<<<<<<<<<<<<<< |
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ELSEIF ( _theSimulationMode .EQ. REVERSE_SIMULATION ) THEN |
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iMin = 1-exchWidthX |
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iMax = 0 |
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IF ( westCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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westSendBuf_RX(iB,eBl,bi,bj) = array(I,J,K,bi,bj) |
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array(I,J,K,bi,bj) = 0.0 |
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ENDDO |
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ENDDO |
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ENDDO |
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C Send the data |
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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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theProc = tilePidW(bi,bj) |
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theTag = _tileTagSendW(bi,bj) |
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theSize = iB |
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theType = _MPI_TYPE_RX |
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exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
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CALL MPI_Isend(westSendBuf_RX(1,eBl,bi,bj), theSize, theType, |
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& theProc, theTag, MPI_COMM_MODEL, |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), 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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eastRecvAck(eBl,biW,bjW) = 1. |
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ELSEIF ( westCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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eastRecvBuf_RX(iB,eBl,biW,bjW) = array(I,J,K,bi,bj) |
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array(I,J,K,bi,bj) = 0.0 |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSEIF ( westCommMode .NE. COMM_NONE |
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& .AND. westCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commW mode.' |
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ENDIF |
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|
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C o Send or Put east edge |
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iMin = sNx+1 |
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iMax = sNx+exchWidthX |
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IF ( eastCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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eastSendBuf_RX(iB,eBl,bi,bj) = array(I,J,K,bi,bj) |
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array(I,J,K,bi,bj) = 0.0 |
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ENDDO |
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ENDDO |
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ENDDO |
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C Send the data |
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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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theProc = tilePidE(bi,bj) |
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theTag = _tileTagSendE(bi,bj) |
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theSize = iB |
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theType = _MPI_TYPE_RX |
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exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
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CALL MPI_Isend(eastSendBuf_RX(1,eBl,bi,bj), theSize, theType, |
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& theProc, theTag, MPI_COMM_MODEL, |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), 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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westRecvAck(eBl,biE,bjE) = 1. |
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ELSEIF ( eastCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO K=1,myNz |
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DO J=1,sNy |
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DO I=iMin,iMax |
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iB = iB + 1 |
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westRecvBuf_RX(iB,eBl,biE,bjE) = array(I,J,K,bi,bj) |
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array(I,J,K,bi,bj) = 0.0 |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSEIF ( eastCommMode .NE. COMM_NONE |
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& .AND. eastCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commE mode.' |
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ENDIF |
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|
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ENDIF |
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|
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ENDDO |
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ENDDO |
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|
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C-- Signal completetion ( making sure system-wide memory state is |
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C-- consistent ). |
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|
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C ** NOTE ** We are relying on being able to produce strong-ordered |
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C memory semantics here. In other words we assume that there is a |
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C mechanism which can ensure that by the time the Ack is seen the |
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C overlap region data that will be exchanged is up to date. |
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IF ( exchNeedsMemSync ) CALL MEMSYNC |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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ebL = exchangeBufLevel(1,bi,bj) |
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biE = _tileBiE(bi,bj) |
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bjE = _tileBjE(bi,bj) |
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biW = _tileBiW(bi,bj) |
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bjW = _tileBjW(bi,bj) |
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westCommMode = _tileCommModeW(bi,bj) |
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eastCommMode = _tileCommModeE(bi,bj) |
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IF ( westCommMode .EQ. COMM_PUT ) eastRecvAck(eBl,biW,bjW) = 1. |
| 380 |
IF ( eastCommMode .EQ. COMM_PUT ) westRecvAck(eBl,biE,bjE) = 1. |
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IF ( westCommMode .EQ. COMM_GET ) eastRecvAck(eBl,biW,bjW) = 1. |
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IF ( eastCommMode .EQ. COMM_GET ) westRecvAck(eBl,biE,bjE) = 1. |
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ENDDO |
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ENDDO |
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|
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C-- Make sure "ack" setting is seen system-wide. |
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C Here strong-ordering is not an issue but we want to make |
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C sure that processes that might spin on the above Ack settings |
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C will see the setting. |
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C ** NOTE ** On some machines we wont spin on the Ack setting |
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C ( particularly the T90 ), instead we will use s system barrier. |
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C On the T90 the system barrier is very fast and switches out the |
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C thread while it waits. On most machines the system barrier |
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C is much too slow and if we own the machine and have one thread |
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C per process preemption is not a problem. |
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IF ( exchNeedsMemSync ) CALL MEMSYNC |
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|
| 398 |
_BARRIER |
| 399 |
IF ( doingSingleThreadedComms ) THEN |
| 400 |
C Restore saved settings that were stored to allow |
| 401 |
C single thred comms. |
| 402 |
_BEGIN_MASTER(myThid) |
| 403 |
DO I=1,nThreads |
| 404 |
myBxLo(I) = myBxLoSave(I) |
| 405 |
myBxHi(I) = myBxHiSave(I) |
| 406 |
myByLo(I) = myByLoSave(I) |
| 407 |
myByHi(I) = myByHiSave(I) |
| 408 |
ENDDO |
| 409 |
_END_MASTER(myThid) |
| 410 |
ENDIF |
| 411 |
_BARRIER |
| 412 |
|
| 413 |
RETURN |
| 414 |
END |
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