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C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_recv_rx1.template,v 1.2 2004/04/05 15:27:06 edhill Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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SUBROUTINE EXCH2_RECV_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, thisI, nN, |
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I e2Bufr1_RX, e2BufrRecSize, |
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I mnb, nt, |
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U array, |
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I i1Lo, i1Hi, j1Lo, j1Hi, k1Lo, k1Hi, |
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U e2_msgHandles, myTiles, |
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I commSetting, |
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I myThid ) |
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|
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IMPLICIT NONE |
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|
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C |
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#include "W2_OPTIONS.h" |
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#include "W2_EXCH2_TOPOLOGY.h" |
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|
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#include "EEPARAMS.h" |
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C |
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C === Routine arguments === |
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C tIlo, tIhi, tIstride :: index range in I that will be filled in target "array" |
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C tJlo, tJhi, tJstride :: index range in J that will be filled in target "array" |
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C tKlo, tKhi, tKstride :: index range in K that will be filled in target "array" |
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C thisTile :: Rank of the receiveing tile |
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C thisI :: Index of the receiving tile within this process (used |
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C :: to select buffer slots that are allowed). |
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C nN :: Neighbour entry that we are processing |
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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. For MSG communication |
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C :: the entry in the buffer associated with this neighbor of this |
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C :: tile is used as a receive location for loading a linear |
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C :: stream of bytes. |
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C e2BufrRecSize :: Number of elements in each entry of e2Bufr1_RX |
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C mnb :: Second dimension of e2Bufr1_RX |
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C nt :: Third dimension of e2Bufr1_RX |
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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 coordinate access |
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C :: to e2Bufr1_RX or to regulate message buffering. In PUT communication |
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C :: sender will increment handle entry once data is ready in buffer. |
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C :: Receiver will decrement handle once data is consumed from buffer. For |
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C :: MPI MSG communication MPI_Wait uses hanlde to check Isend has cleared. |
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C :: This is done in routine after receives. |
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C myTiles :: List of nt tiles that this process owns. |
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C commSetting :: Mode of communication used to exchnage with this neighbor |
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C myThid :: Thread number of this instance of EXCH2_RECV_RX1 |
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C |
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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, thisI |
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INTEGER e2BufrRecSize |
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INTEGER mnb, nt |
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_RX e2Bufr1_RX( e2BufrRecSize, mnb, nt, 2 ) |
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_RX array(i1Lo:i1Hi,j1Lo:j1Hi,k1Lo:k1Hi) |
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INTEGER e2_msgHandles(mnb, nt) |
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INTEGER myThid |
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INTEGER myTiles(nt) |
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CHARACTER commSetting |
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|
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C == Local variables == |
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C itl, jtl, ktl :: Loop counters |
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C :: itl etc... target local |
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C :: itc etc... target canonical |
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C :: isl etc... source local |
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C :: isc etc... source canonical |
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INTEGER itl, jtl, ktl |
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c INTEGER itc, jtc, ktc |
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c INTEGER isc, jsc, ksc |
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c INTEGER isl, jsl, ksl |
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C tt :: Target tile |
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C iBufr :: Buffer counter |
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INTEGER tt |
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INTEGER iBufr |
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C mb, nb :: Selects e2Bufr, msgHandle record to use |
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C ir :: |
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INTEGER mb, nb, ir |
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C oN :: Opposing send record number |
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INTEGER oN |
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C Loop counters |
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c INTEGER I, nri, nrj, nrk |
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INTEGER I |
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|
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C MPI setup |
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#include "SIZE.h" |
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#include "EESUPPORT.h" |
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#ifdef ALLOW_USE_MPI |
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c INTEGER theTag, theSize, theType |
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INTEGER theTag, theType |
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INTEGER sProc, tProc |
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INTEGER nri, nrj, nrk |
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INTEGER mpiStatus(MPI_STATUS_SIZE), mpiRc |
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#ifdef W2_E2_DEBUG_ON |
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CHARACTER*(MAX_LEN_MBUF) messageBuffer |
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#endif |
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#endif |
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|
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tt=exch2_neighbourId(nN, thisTile ) |
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oN=exch2_opposingSend_record(nN, thisTile ) |
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|
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C Handle receive end data transport according to communication mechanism between |
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C source and target tile |
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IF ( commSetting .EQ. 'P' ) THEN |
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C 1 Need to check and spin on data ready assertion for multithreaded mode, for now do nothing i.e. |
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C assume only one thread per process. |
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|
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C 2 Need to set e2Bufr to use put buffer from opposing send. |
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oN = exch2_opposingSend_record(nN, thisTile ) |
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mb = oN |
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DO I=1,nt |
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IF ( myTiles(I) .EQ. tt ) THEN |
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nb = I |
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ir = 1 |
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ENDIF |
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ENDDO |
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C Get data from e2Bufr(1,mb,nb) |
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ELSEIF ( commSetting .EQ. 'M' ) THEN |
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#ifdef ALLOW_USE_MPI |
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C Setup MPI stuff here |
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nb = thisI |
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mb = nN |
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ir = 2 |
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theTag = (tt-1)*MAX_NEIGHBOURS + oN |
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& + 10000*( |
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& (thisTile-1)*MAX_NEIGHBOURS + oN |
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& ) |
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tProc = exch2_tProc(thisTile)-1 |
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sProc = exch2_tProc(tt)-1 |
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theType = MPI_REAL8 |
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nri = (tIhi-tIlo+1)/tiStride |
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nrj = (tJhi-tJlo+1)/tjStride |
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nrk = (tKhi-tKlo+1)/tkStride |
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iBufr = nri*nrj*nrk |
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CALL MPI_Recv( e2Bufr1_RX(1,mb,nb,ir), iBufr, theType, sProc, |
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& theTag, MPI_COMM_MODEL, mpiStatus, mpiRc ) |
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#ifdef W2_E2_DEBUG_ON |
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WRITE(messageBuffer,'(A,I4,A,I4,A)') ' RECV FROM TILE=', tt, |
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& ' (proc = ',sProc,')' |
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CALL PRINT_MESSAGE(messageBuffer, |
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I standardMessageUnit,SQUEEZE_RIGHT, |
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I myThid) |
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WRITE(messageBuffer,'(A,I4,A,I4,A)') ' INTO TILE=', thisTile, |
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& ' (proc = ',tProc,')' |
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CALL PRINT_MESSAGE(messageBuffer, |
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I standardMessageUnit,SQUEEZE_RIGHT, |
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I myThid) |
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WRITE(messageBuffer,'(A,I10)') ' TAG=', theTag |
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CALL PRINT_MESSAGE(messageBuffer, |
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I standardMessageUnit,SQUEEZE_RIGHT, |
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I myThid) |
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WRITE(messageBuffer,'(A,I4)') ' NEL=', iBufr |
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CALL PRINT_MESSAGE(messageBuffer, |
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I standardMessageUnit,SQUEEZE_RIGHT, |
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I myThid) |
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#endif /* W2_E2_DEBUG_ON */ |
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C Set mb to neighbour entry |
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C Set nt to this tiles rank |
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mb = nN |
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#endif |
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ELSE |
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STOP 'EXCH2_RECV_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,mb,nb) |
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iBufr=iBufr+1 |
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array(itl,jtl,ktl)=e2Bufr1_RX(iBufr,mb,nb,ir) |
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ENDDO |
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ENDDO |
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ENDDO |
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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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