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C $Header: /u/gcmpack/MITgcm/pkg/exch2/w2_eeboot.F,v 1.4 2004/09/07 17:29:14 edhill Exp $ |
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C $Name: $ |
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|
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#include "CPP_EEOPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: W2_EEBOOT |
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|
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C !INTERFACE: |
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SUBROUTINE W2_EEBOOT |
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IMPLICIT NONE |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE W2_EEBOOT |
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C | o Setup execution "environment" for WRAPPER2 |
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C *==========================================================* |
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C | WRAPPER2 provides complex topology support. In this routine |
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C | we setup the base topology for the default halo operations. |
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C *==========================================================* |
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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_TOPOLOGY.h" |
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#include "W2_EXCH2_PARAMS.h" |
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|
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C == Local variables == |
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INTEGER nt_check, nt_perproc |
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INTEGER thisPtileLo, thisPtileHi |
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CHARACTER*(MAX_LEN_MBUF) msgBuffer |
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CHARACTER commFlag |
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INTEGER myTileId |
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INTEGER myThid, I, J, II |
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INTEGER iErr, tNx, tNy |
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INTEGER pRank |
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#ifdef ALLOW_USE_MPI |
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INTEGER npe,itemp(nSx),mpiBufSize,mpiRequest |
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INTEGER istatus(MPI_STATUS_SIZE) |
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#endif |
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|
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C Set dummy myThid value (we are not multi-threaded here) |
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myThid = 1 |
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|
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C Define toplogy for every tile |
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CALL W2_E2SETUP |
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|
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C Decide which tiles this process handles - do this inline for now, but |
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C should go in subroutine. |
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C Total number of tiles should be divisible by nPx and nSx |
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C ( there is no two dimensional decomposition for W2 ) and |
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C number of tiles per process should be nSx |
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nt_check = NTILES/(nPx*nSx) |
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nt_check = nt_check*nPx*nSx |
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IF ( nt_check .NE. NTILES ) THEN |
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STOP |
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&'ERROR: W2_EEBOOT number of tiles is not divisible by nPx*nSx' |
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ENDIF |
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nt_perproc = NTILES/nPx |
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IF ( nt_perproc .NE. nSx ) THEN |
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STOP |
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&'ERROR: W2_EEBOOT tiles per process is not equal to nSx' |
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ENDIF |
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C Number of tiles I handle is nSx, range of tile numbers I handle |
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C depends on my rank. |
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#ifdef ALLOW_USE_MPI |
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thisPtileLo = myPid*nt_perproc+1 |
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thisPtileHi = (myPid+1)*nt_perproc |
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#else |
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thisPtileLo = 1 |
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thisPtileHi = nt_perproc |
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#endif |
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DO I=thisPtileLo, thisPtileHi |
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W2_myTileList(I-thisPtileLo+1)=I |
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ENDDO |
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iErr = 0 |
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|
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DO I=1,nSx |
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C Check tile sizes |
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myTileId = W2_myTileList(I) |
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tnx = exch2_tnx(myTileId) |
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tny = exch2_tny(myTileId) |
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IF ( tnx .NE. sNx ) THEN |
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WRITE(msgBuffer,'(A,I4,A,I4)') |
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& 'ERROR: S/R W2_EEBOOT Topology tnx=', |
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& tnx, |
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& ' is not equal to subgrid size sNx=', |
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& sNx |
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CALL PRINT_MESSAGE(msgBuffer, |
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& errorMessageUnit, SQUEEZE_RIGHT, 1 ) |
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iErr = iErr+1 |
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ENDIF |
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IF ( tny .NE. sNy ) THEN |
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WRITE(msgBuffer,'(A,I4,A,I4,A,I4)') |
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& 'ERROR: S/R W2_EEBOOT Topology for tile ',myTileId, |
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& 'tny=', |
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& tny, |
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& ' is not equal to subgrid size sNy=', |
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& sNy |
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CALL PRINT_MESSAGE(msgBuffer, |
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& errorMessageUnit, SQUEEZE_RIGHT, 1 ) |
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iErr = iErr+1 |
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ENDIF |
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ENDDO |
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IF ( iErr .NE. 0 ) THEN |
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STOP 'ABNORMAL END: W2_EEBOOT' |
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ENDIF |
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|
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C Set which rank processes "own" which tiles. This should probably |
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C be queried as part of some hand-shaking but for now we use the |
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C functiional relationship that was used above. |
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DO I=1,nTiles |
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pRank = (I-1)/nt_perproc |
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exch2_tProc(I) = pRank+1 |
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ENDDO |
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|
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WRITE(msgBuffer,'(A)') '===== W2 TILE TOPLOGY =====' |
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CALL PRINT_MESSAGE(msgBuffer,standardMessageUnit, |
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& SQUEEZE_BOTH,myThid) |
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DO I=1,nSx |
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myTileId = W2_myTileList(I) |
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WRITE(msgBuffer,'(A,I4)') ' TILE: ', myTileId |
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CALL PRINT_MESSAGE(msgBuffer,standardMessageUnit, |
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& SQUEEZE_RIGHT,myThid) |
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DO J=1,exch2_nNeighbours(myTileId) |
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commFlag = 'M' |
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DO II=1,nSx |
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IF ( W2_myTileList(II) .EQ. exch2_neighbourId(J,myTileId) ) |
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& commFlag = 'P' |
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ENDDO |
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IF ( commFlag .EQ. 'M' ) THEN |
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WRITE(msgBuffer,'(A,I4,A,I4,A,A,I4,A)') |
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& ' NEIGHBOUR ',J,' = TILE ', |
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& exch2_neighbourId(J,myTileId), ' Comm = MSG', |
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& ' ( PROC = ',exch2_tProc(exch2_neighbourId(J,myTileId)),')' |
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CALL PRINT_MESSAGE(msgBuffer,standardMessageUnit, |
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& SQUEEZE_RIGHT,myThid) |
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ENDIF |
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IF ( commFlag .EQ. 'P' ) THEN |
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WRITE(msgBuffer,'(A,I4,A,I4,A,A,I4,A)') |
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& ' NEIGHBOUR ',J,' = TILE ', |
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& exch2_neighbourId(J,myTileId), ' Comm = PUT', |
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& ' ( PROC = ',exch2_tProc(exch2_neighbourId(J,myTileId)),')' |
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CALL PRINT_MESSAGE(msgBuffer,standardMessageUnit, |
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& SQUEEZE_RIGHT,myThid) |
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ENDIF |
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W2_myCommFlag(J,I) = commFlag |
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ENDDO |
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ENDDO |
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|
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C Fill in values for W2_mpi_myTileList |
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#ifdef ALLOW_USE_MPI |
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mpiBufSize=nSx |
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mpiRequest=0 |
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DO npe = 0, numberOfProcs-1 |
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CALL MPI_ISEND (W2_myTileList, mpiBufSize, MPI_INTEGER, |
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& npe, mpiMyId, MPI_COMM_MODEL, mpiRequest, ierr) |
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ENDDO |
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DO npe = 0, numberOfProcs-1 |
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CALL MPI_RECV (itemp, mpiBufSize, MPI_INTEGER, |
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& npe, npe, MPI_COMM_MODEL, istatus, ierr) |
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DO I=1,nSx |
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W2_mpi_myTileList(npe+1,I)=itemp(I) |
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ENDDO |
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ENDDO |
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#else /* ALLOW_USE_MPI */ |
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DO I=1,nSx |
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W2_mpi_myTileList(1,I)=W2_myTileList(I) |
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ENDDO |
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#endif /* ALLOW_USE_MPI */ |
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|
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C Print out the topology communication schedule |
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CALL W2_PRINT_COMM_SEQUENCE |
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C |
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RETURN |
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END |
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