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C $Header: /u/gcmpack/MITgcm/eesupp/src/exch_rx_send_put_y.template,v 1.13 2009/01/09 22:51:12 jmc 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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C !ROUTINE: EXCH_RX_SEND_PUT_Y |
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|
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C !INTERFACE: |
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SUBROUTINE EXCH_RX_SEND_PUT_Y( 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 SEND_PUT_Y |
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C | o "Send" or "put" Y 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 Y 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 Note - the reverse mode for an assignment |
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C is an accumulation. This means that |
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C put implementations that do leary things |
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C like writing to overlap regions in a |
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C remote process need to be even more |
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C careful. You need to be pretty careful |
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C in forward mode too! |
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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, jMin, jMax, iB - Loop counters and extents |
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C bi, bj |
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C biS, bjS - South tile indices |
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C biN, bjN - North 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 southCommMode - Working variables holding type |
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C northCommMode of communication a particular |
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C tile face uses. |
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INTEGER i, j, k, jMin, jMax, iMin, iMax, iB |
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INTEGER bi, bj, biS, bjS, biN, bjN |
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INTEGER eBl |
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INTEGER northCommMode |
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INTEGER southCommMode |
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#ifdef ALLOW_USE_MPI |
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INTEGER theProc, theTag, theType, theSize, mpiRc |
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# ifdef ALLOW_AUTODIFF_OPENAD_AMPI |
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INTEGER mpiStatus(MPI_STATUS_SIZE) |
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INTEGER pReqI |
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# endif |
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#endif |
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|
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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 south send buffer from this tile. |
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C Send data with tag identifying tile and direction. |
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C Fill north 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 south receive buffer of south-neighbor tile |
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C Fill north receive buffer of north-neighbor tile |
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C Sync. memory |
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C Write data-ready Ack for north edge of south-neighbor |
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C tile |
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C Write data-ready Ack for south edge of north-neighbor |
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C tile |
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C Sync. memory |
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CEOP |
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|
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#ifdef ALLOW_AUTODIFF_OPENAD_AMPI |
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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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_BEGIN_MASTER(myThid) |
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DO bj=1,nSy |
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DO bi=1,nSx |
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CALL ampi_awaitall ( |
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& exchNReqsY(1,bi,bj) , |
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& exchReqIdY(1,1,bi,bj) , |
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& mpiStatus , |
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& mpiRC ) |
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ENDDO |
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ENDDO |
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_END_MASTER(myThid) |
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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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#endif |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C Prevent anyone to access shared buffer while an other thread modifies it |
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_BARRIER |
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|
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C Fill shared buffers from array values |
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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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southCommMode = _tileCommModeS(bi,bj) |
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northCommMode = _tileCommModeN(bi,bj) |
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biS = _tileBiS(bi,bj) |
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bjS = _tileBjS(bi,bj) |
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biN = _tileBiN(bi,bj) |
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bjN = _tileBjN(bi,bj) |
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iMin = 1 |
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iMax = sNx |
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IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN |
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iMin = 1-exchWidthX |
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iMax = sNx+exchWidthX |
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ENDIF |
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|
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C >>>>>>>>>>>>>>>>>>> FORWARD RUN <<<<<<<<<<<<<<<<<<< |
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|
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IF ( _theSimulationMode .EQ. FORWARD_SIMULATION ) THEN |
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|
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C o Send or Put south edge |
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jMin = 1 |
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jMax = 1+exchWidthY-1 |
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IF ( southCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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southSendBuf_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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ELSEIF ( southCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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northRecvBuf_RX(iB,eBl,biS,bjS) = 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 ( southCommMode .NE. COMM_NONE |
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& .AND. southCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commS mode.' |
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ENDIF |
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|
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C o Send or Put north edge |
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jMin = sNy-exchWidthY+1 |
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jMax = sNy |
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IF ( northCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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northSendBuf_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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ELSEIF ( northCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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southRecvBuf_RX(iB,eBl,biN,bjN) = 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 ( northCommMode .NE. COMM_NONE |
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& .AND. northCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commN mode.' |
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ENDIF |
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|
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C >>>>>>>>>>>>>>>>>>> ADJOINT RUN <<<<<<<<<<<<<<<<<<< |
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|
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ELSEIF ( _theSimulationMode .EQ. REVERSE_SIMULATION ) THEN |
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|
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C o Send or Put south edge |
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jMin = 1-exchWidthY |
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jMax = 0 |
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IF ( southCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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southSendBuf_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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ELSEIF ( southCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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northRecvBuf_RX(iB,eBl,biS,bjS) = 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 ( southCommMode .NE. COMM_NONE |
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& .AND. southCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commS mode.' |
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ENDIF |
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|
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C o Send or Put north edge |
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jMin = sNy+1 |
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jMax = sNy+exchWidthY |
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IF ( northCommMode .EQ. COMM_MSG ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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northSendBuf_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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ELSEIF ( northCommMode .EQ. COMM_PUT ) THEN |
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iB = 0 |
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DO k=1,myNz |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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iB = iB + 1 |
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southRecvBuf_RX(iB,eBl,biN,bjN) = 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 ( northCommMode .NE. COMM_NONE |
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& .AND. northCommMode .NE. COMM_GET ) THEN |
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STOP ' S/R EXCH: Invalid commN 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---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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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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biS = _tileBiS(bi,bj) |
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bjS = _tileBjS(bi,bj) |
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biN = _tileBiN(bi,bj) |
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bjN = _tileBjN(bi,bj) |
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southCommMode = _tileCommModeS(bi,bj) |
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northCommMode = _tileCommModeN(bi,bj) |
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IF ( southCommMode.EQ.COMM_PUT ) northRecvAck(eBl,biS,bjS) = 1 |
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IF ( northCommMode.EQ.COMM_PUT ) southRecvAck(eBl,biN,bjN) = 1 |
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IF ( southCommMode.EQ.COMM_GET ) northRecvAck(eBl,biS,bjS) = 1 |
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IF ( northCommMode.EQ.COMM_GET ) southRecvAck(eBl,biN,bjN) = 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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|
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C Wait until all threads finish filling buffer |
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_BARRIER |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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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-- Send buffer data: Only Master Thread do proc communication |
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_BEGIN_MASTER(myThid) |
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|
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DO bj=1,nSy |
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DO bi=1,nSx |
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|
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eBl = exchangeBufLevel(1,bi,bj) |
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southCommMode = _tileCommModeS(bi,bj) |
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northCommMode = _tileCommModeN(bi,bj) |
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biS = _tileBiS(bi,bj) |
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bjS = _tileBjS(bi,bj) |
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biN = _tileBiN(bi,bj) |
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bjN = _tileBjN(bi,bj) |
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theType = _MPI_TYPE_RX |
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theSize = sNx*exchWidthY*myNz |
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IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN |
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theSize = (sNx+2*exchWidthX)*exchWidthY*myNz |
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ENDIF |
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|
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IF ( southCommMode .EQ. COMM_MSG ) THEN |
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C Send buffer data (copied from south edge) |
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theProc = tilePidS(bi,bj) |
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theTag = _tileTagSendS(bi,bj) |
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# ifndef ALLOW_AUTODIFF_OPENAD_AMPI |
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exchNreqsY(1,bi,bj) = exchNreqsY(1,bi,bj)+1 |
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CALL MPI_Isend( southSendBuf_RX(1,eBl,bi,bj), theSize, |
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& theType, theProc, theTag, MPI_COMM_MODEL, |
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& exchReqIdY(exchNreqsY(1,bi,bj),1,bi,bj), |
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& mpiRc ) |
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# else |
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pReqI=exchNReqsY(1,bi,bj)+1 |
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CALL ampi_isend_RX( |
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& southSendBuf_RX(1,eBl,bi,bj), |
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& theSize, |
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& theType, |
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& theProc, |
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& theTag, |
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& MPI_COMM_MODEL, |
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& exchReqIdY(pReqI,1,bi,bj), |
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& exchNReqsY(1,bi,bj), |
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& mpiStatus, |
| 377 |
& mpiRc ) |
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# endif /* ALLOW_AUTODIFF_OPENAD_AMPI */ |
| 379 |
c northRecvAck(eBl,biS,bjS) = 1 |
| 380 |
ENDIF |
| 381 |
|
| 382 |
IF ( northCommMode .EQ. COMM_MSG ) THEN |
| 383 |
C Send buffer data (copied from north edge) |
| 384 |
theProc = tilePidN(bi,bj) |
| 385 |
theTag = _tileTagSendN(bi,bj) |
| 386 |
#ifndef ALLOW_AUTODIFF_OPENAD_AMPI |
| 387 |
exchNreqsY(1,bi,bj) = exchNreqsY(1,bi,bj)+1 |
| 388 |
CALL MPI_Isend( northSendBuf_RX(1,eBl,bi,bj), theSize, |
| 389 |
& theType, theProc, theTag, MPI_COMM_MODEL, |
| 390 |
& exchReqIdY(exchNreqsY(1,bi,bj),1,bi,bj), |
| 391 |
& mpiRc ) |
| 392 |
# else |
| 393 |
pReqI=exchNReqsY(1,bi,bj)+1 |
| 394 |
CALL ampi_isend_RX( |
| 395 |
& northSendBuf_RX(1,eBl,bi,bj) , |
| 396 |
& theSize , |
| 397 |
& theType , |
| 398 |
& theProc , |
| 399 |
& theTag , |
| 400 |
& MPI_COMM_MODEL , |
| 401 |
& exchReqIdY(pReqI,1,bi,bj) , |
| 402 |
& exchNReqsY(1,bi,bj) , |
| 403 |
& mpiStatus , |
| 404 |
& mpiRc ) |
| 405 |
# endif /* ALLOW_AUTODIFF_OPENAD_AMPI */ |
| 406 |
c southRecvAck(eBl,biN,bjN) = 1 |
| 407 |
ENDIF |
| 408 |
|
| 409 |
ENDDO |
| 410 |
ENDDO |
| 411 |
|
| 412 |
_END_MASTER(myThid) |
| 413 |
|
| 414 |
#ifndef ALWAYS_USE_MPI |
| 415 |
ENDIF |
| 416 |
#endif |
| 417 |
#endif /* ALLOW_USE_MPI */ |
| 418 |
|
| 419 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 420 |
|
| 421 |
RETURN |
| 422 |
END |
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