| 1 |
jmc |
1.6 |
C $Header: /u/gcmpack/MITgcm/pkg/flt/exch_send_put_vec.F,v 1.5 2009/01/07 23:17:23 jmc Exp $ |
| 2 |
jmc |
1.2 |
C $Name: $ |
| 3 |
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| 4 |
jmc |
1.6 |
#include "CPP_EEOPTIONS.h" |
| 5 |
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#undef DBUG_EXCH_VEC |
| 6 |
jmc |
1.4 |
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| 7 |
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C-- Contents |
| 8 |
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C-- o EXCH_RL_SEND_PUT_VEC_X |
| 9 |
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C-- o EXCH_RL_SEND_PUT_VEC_Y |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 12 |
jmc |
1.6 |
CBOP 0 |
| 13 |
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C !ROUTINE: EXCH_RL_SEND_PUT_VEC_X |
| 14 |
adcroft |
1.1 |
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| 15 |
jmc |
1.6 |
C !INTERFACE: |
| 16 |
jmc |
1.5 |
SUBROUTINE EXCH_RL_SEND_PUT_VEC_X( |
| 17 |
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I arrayE, arrayW, |
| 18 |
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O bufRecE, bufRecW, |
| 19 |
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I myd1, myThid ) |
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jmc |
1.6 |
C !DESCRIPTION: |
| 21 |
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C *==========================================================* |
| 22 |
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C | SUBROUTINE EXCH_RL_SEND_PUT_VEC_X |
| 23 |
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C | o "Send" or "put" X edges for RL array. |
| 24 |
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C *==========================================================* |
| 25 |
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C | Routine that invokes actual message passing send or |
| 26 |
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C | direct "put" of data to update buffer in X direction |
| 27 |
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C *==========================================================* |
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C !USES: |
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adcroft |
1.1 |
IMPLICIT NONE |
| 31 |
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| 32 |
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C == Global variables == |
| 33 |
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#include "SIZE.h" |
| 34 |
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#include "EEPARAMS.h" |
| 35 |
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#include "EESUPPORT.h" |
| 36 |
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#include "EXCH.h" |
| 37 |
jmc |
1.6 |
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| 38 |
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C !INPUT/OUTPUT PARAMETERS: |
| 39 |
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C arrayE :: Input buffer array to send to Eastern Neighbour |
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C arrayW :: Input buffer array to send to Western Neighbour |
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C bufRecE :: buffer array to collect Eastern Neighbour values |
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C bufRecW :: buffer array to collect Western Neighbour values |
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C myd1 :: size |
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C myThid :: my Thread Id. number |
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adcroft |
1.1 |
INTEGER myd1 |
| 46 |
jmc |
1.5 |
_RL arrayE(myd1,nSx,nSy), arrayW(myd1,nSx,nSy) |
| 47 |
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_RL bufRecE(myd1,nSx,nSy), bufRecW(myd1,nSx,nSy) |
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adcroft |
1.1 |
INTEGER myThid |
| 49 |
jmc |
1.6 |
CEOP |
| 50 |
adcroft |
1.1 |
|
| 51 |
jmc |
1.6 |
C !LOCAL VARIABLES: |
| 52 |
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C I :: Loop counters |
| 53 |
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C bi, bj :: tile indices |
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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 theProc :: \ |
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C theTag :: \ |
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C theType :: / Variables used in message building |
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C theSize :: / |
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C westCommMode :: variables holding type of communication |
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C eastCommMode :: a particular tile face uses. |
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jmc |
1.4 |
INTEGER I |
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adcroft |
1.1 |
INTEGER bi, bj, biW, bjW, biE, bjE |
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INTEGER westCommMode |
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INTEGER eastCommMode |
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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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jmc |
1.6 |
#ifdef DBUG_EXCH_VEC |
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INTEGER ioUnit |
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#endif |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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adcroft |
1.1 |
C-- Write data to exchange buffer |
| 75 |
jmc |
1.2 |
C Various actions are possible depending on the communication mode |
| 76 |
adcroft |
1.1 |
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 ) |
| 82 |
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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. |
| 85 |
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C Send data with tag identifying tile and direction. |
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C |
| 87 |
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C COMM_PUT "Put" communication ( UMP_, shmemput, etc... ) |
| 88 |
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C Fill east receive buffer of west-neighbor tile |
| 89 |
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C Fill west receive buffer of east-neighbor tile |
| 90 |
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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 |
| 96 |
jmc |
1.6 |
|
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#ifdef DBUG_EXCH_VEC |
| 98 |
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ioUnit = errorMessageUnit |
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WRITE(ioUnit,'(A,2L5)') |
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& 'SEND_PUT_X: exchNeedsMemsync,exchUsesBarrier=', |
| 101 |
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& exchNeedsMemsync,exchUsesBarrier |
| 102 |
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#endif |
| 103 |
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| 104 |
adcroft |
1.1 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 105 |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 106 |
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| 107 |
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westCommMode = _tileCommModeW(bi,bj) |
| 108 |
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eastCommMode = _tileCommModeE(bi,bj) |
| 109 |
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biE = _tileBiE(bi,bj) |
| 110 |
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bjE = _tileBjE(bi,bj) |
| 111 |
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biW = _tileBiW(bi,bj) |
| 112 |
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bjW = _tileBjW(bi,bj) |
| 113 |
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| 114 |
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C o Send or Put west edge |
| 115 |
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IF ( westCommMode .EQ. COMM_MSG ) THEN |
| 116 |
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C Send the data |
| 117 |
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#ifdef ALLOW_USE_MPI |
| 118 |
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#ifndef ALWAYS_USE_MPI |
| 119 |
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IF ( usingMPI ) THEN |
| 120 |
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#endif |
| 121 |
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theProc = tilePidW(bi,bj) |
| 122 |
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theTag = _tileTagSendW(bi,bj) |
| 123 |
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theSize = myd1 |
| 124 |
jmc |
1.6 |
theType = _MPI_TYPE_RL |
| 125 |
adcroft |
1.1 |
exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
| 126 |
jmc |
1.6 |
#ifdef DBUG_EXCH_VEC |
| 127 |
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write(ioUnit,'(A,7I5,I8)') 'qq1xW: ',myProcId,bi,bj, |
| 128 |
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& theProc,theTag, exchNReqsX(1,bi,bj), |
| 129 |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), theSize |
| 130 |
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#endif |
| 131 |
adcroft |
1.1 |
CALL MPI_Isend(arrayW(1,bi,bj), theSize, theType, |
| 132 |
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& theProc, theTag, MPI_COMM_MODEL, |
| 133 |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), mpiRc) |
| 134 |
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#ifndef ALWAYS_USE_MPI |
| 135 |
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ENDIF |
| 136 |
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#endif |
| 137 |
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#endif /* ALLOW_USE_MPI */ |
| 138 |
jmc |
1.6 |
eastRecvAck(1,biW,bjW) = 1 |
| 139 |
adcroft |
1.1 |
ELSEIF ( westCommMode .EQ. COMM_PUT ) THEN |
| 140 |
jmc |
1.5 |
c write(0,*) 'SEND_PUT_VEC_X: copy E:',biW,bjW,' <- W:',bi,bj |
| 141 |
adcroft |
1.1 |
DO I=1,myd1 |
| 142 |
jmc |
1.5 |
bufRecE(I,biW,bjW) = arrayW(I,bi,bj) |
| 143 |
adcroft |
1.1 |
ENDDO |
| 144 |
jmc |
1.5 |
ELSEIF ( westCommMode .NE. COMM_NONE ) THEN |
| 145 |
adcroft |
1.1 |
STOP ' S/R EXCH: Invalid commW mode.' |
| 146 |
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ENDIF |
| 147 |
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| 148 |
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C o Send or Put east edge |
| 149 |
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IF ( eastCommMode .EQ. COMM_MSG ) THEN |
| 150 |
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C Send the data |
| 151 |
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#ifdef ALLOW_USE_MPI |
| 152 |
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#ifndef ALWAYS_USE_MPI |
| 153 |
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IF ( usingMPI ) THEN |
| 154 |
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#endif |
| 155 |
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theProc = tilePidE(bi,bj) |
| 156 |
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theTag = _tileTagSendE(bi,bj) |
| 157 |
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theSize = myd1 |
| 158 |
jmc |
1.6 |
theType = _MPI_TYPE_RL |
| 159 |
adcroft |
1.1 |
exchNReqsX(1,bi,bj) = exchNReqsX(1,bi,bj)+1 |
| 160 |
jmc |
1.6 |
#ifdef DBUG_EXCH_VEC |
| 161 |
adcroft |
1.1 |
c if (theProc .eq. 2 .or. theProc .eq. 4) then |
| 162 |
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c if (arrayE(1,bi,bj) .ne. 0.) then |
| 163 |
jmc |
1.6 |
write(ioUnit,'(A,7I5,I8)') 'qq1xE: ',myProcId,bi,bj, |
| 164 |
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& theProc,theTag, exchNReqsX(1,bi,bj), |
| 165 |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), theSize |
| 166 |
adcroft |
1.1 |
c endif |
| 167 |
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c endif |
| 168 |
jmc |
1.6 |
#endif |
| 169 |
adcroft |
1.1 |
CALL MPI_Isend(arrayE(1,bi,bj), theSize, theType, |
| 170 |
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& theProc, theTag, MPI_COMM_MODEL, |
| 171 |
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& exchReqIdX(exchNReqsX(1,bi,bj),1,bi,bj), mpiRc) |
| 172 |
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#ifndef ALWAYS_USE_MPI |
| 173 |
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ENDIF |
| 174 |
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#endif |
| 175 |
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#endif /* ALLOW_USE_MPI */ |
| 176 |
jmc |
1.6 |
westRecvAck(1,biE,bjE) = 1 |
| 177 |
adcroft |
1.1 |
ELSEIF ( eastCommMode .EQ. COMM_PUT ) THEN |
| 178 |
jmc |
1.5 |
c write(0,*) 'SEND_PUT_VEC_X: copy W:',biE,bjE,' <- E:',bi,bj |
| 179 |
adcroft |
1.1 |
DO I=1,myd1 |
| 180 |
jmc |
1.5 |
bufRecW(I,biE,bjE) = arrayE(I,bi,bj) |
| 181 |
adcroft |
1.1 |
ENDDO |
| 182 |
jmc |
1.5 |
ELSEIF ( eastCommMode .NE. COMM_NONE ) THEN |
| 183 |
adcroft |
1.1 |
STOP ' S/R EXCH: Invalid commE mode.' |
| 184 |
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ENDIF |
| 185 |
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| 186 |
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ENDDO |
| 187 |
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ENDDO |
| 188 |
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| 189 |
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C-- Signal completetion ( making sure system-wide memory state is |
| 190 |
|
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C-- consistent ). |
| 191 |
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| 192 |
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C ** NOTE ** We are relying on being able to produce strong-ordered |
| 193 |
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C memory semantics here. In other words we assume that there is a |
| 194 |
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C mechanism which can ensure that by the time the Ack is seen the |
| 195 |
|
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C overlap region data that will be exchanged is up to date. |
| 196 |
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IF ( exchNeedsMemSync ) CALL MEMSYNC |
| 197 |
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| 198 |
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DO bj=myByLo(myThid),myByHi(myThid) |
| 199 |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 200 |
|
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biE = _tileBiE(bi,bj) |
| 201 |
|
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bjE = _tileBjE(bi,bj) |
| 202 |
|
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biW = _tileBiW(bi,bj) |
| 203 |
|
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bjW = _tileBjW(bi,bj) |
| 204 |
|
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westCommMode = _tileCommModeW(bi,bj) |
| 205 |
|
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eastCommMode = _tileCommModeE(bi,bj) |
| 206 |
jmc |
1.6 |
IF ( westCommMode .EQ. COMM_PUT ) eastRecvAck(1,biW,bjW) = 1 |
| 207 |
|
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IF ( eastCommMode .EQ. COMM_PUT ) westRecvAck(1,biE,bjE) = 1 |
| 208 |
|
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IF ( westCommMode .EQ. COMM_GET ) eastRecvAck(1,biW,bjW) = 1 |
| 209 |
|
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IF ( eastCommMode .EQ. COMM_GET ) westRecvAck(1,biE,bjE) = 1 |
| 210 |
adcroft |
1.1 |
ENDDO |
| 211 |
|
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ENDDO |
| 212 |
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| 213 |
|
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C-- Make sure "ack" setting is seen system-wide. |
| 214 |
|
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C Here strong-ordering is not an issue but we want to make |
| 215 |
|
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C sure that processes that might spin on the above Ack settings |
| 216 |
|
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C will see the setting. |
| 217 |
|
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C ** NOTE ** On some machines we wont spin on the Ack setting |
| 218 |
|
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C ( particularly the T90 ), instead we will use s system barrier. |
| 219 |
jmc |
1.2 |
C On the T90 the system barrier is very fast and switches out the |
| 220 |
adcroft |
1.1 |
C thread while it waits. On most machines the system barrier |
| 221 |
|
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C is much too slow and if we own the machine and have one thread |
| 222 |
|
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C per process preemption is not a problem. |
| 223 |
|
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IF ( exchNeedsMemSync ) CALL MEMSYNC |
| 224 |
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| 225 |
jmc |
1.2 |
RETURN |
| 226 |
adcroft |
1.1 |
END |
| 227 |
|
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|
| 228 |
jmc |
1.4 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 229 |
jmc |
1.6 |
CBOP 0 |
| 230 |
|
|
C !ROUTINE: EXCH_RL_SEND_PUT_VEC_Y |
| 231 |
jmc |
1.4 |
|
| 232 |
jmc |
1.6 |
C !INTERFACE: |
| 233 |
jmc |
1.5 |
SUBROUTINE EXCH_RL_SEND_PUT_VEC_Y( |
| 234 |
|
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I arrayN, arrayS, |
| 235 |
|
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O bufRecN, bufRecS, |
| 236 |
|
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I myd1, myThid ) |
| 237 |
jmc |
1.6 |
C !DESCRIPTION: |
| 238 |
|
|
C *==========================================================* |
| 239 |
|
|
C | SUBROUTINE EXCH_RL_SEND_PUT_VEC_Y |
| 240 |
|
|
C | o "Send" or "put" Y edges for RL array. |
| 241 |
|
|
C *==========================================================* |
| 242 |
|
|
C | Routine that invokes actual message passing send or |
| 243 |
|
|
C | direct "put" of data to update buffer in Y direction |
| 244 |
|
|
C *==========================================================* |
| 245 |
|
|
|
| 246 |
|
|
C !USES: |
| 247 |
adcroft |
1.1 |
IMPLICIT NONE |
| 248 |
|
|
|
| 249 |
|
|
C == Global variables == |
| 250 |
|
|
#include "SIZE.h" |
| 251 |
|
|
#include "EEPARAMS.h" |
| 252 |
|
|
#include "EESUPPORT.h" |
| 253 |
|
|
#include "EXCH.h" |
| 254 |
jmc |
1.6 |
|
| 255 |
|
|
C !INPUT/OUTPUT PARAMETERS: |
| 256 |
|
|
C arrayN :: buffer array to collect Northern Neighbour values |
| 257 |
|
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C arrayS :: buffer array to collect Southern Neighbour values |
| 258 |
|
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C myd1 :: size |
| 259 |
|
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C myThid :: my Thread Id. number |
| 260 |
|
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C arrayN :: Input buffer array to send to Northern Neighbour |
| 261 |
|
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C arrayS :: Input buffer array to send to Southern Neighbour |
| 262 |
|
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C bufRecN :: buffer array to collect Northern Neighbour values |
| 263 |
|
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C bufRecS :: buffer array to collect Southern Neighbour values |
| 264 |
|
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C myd1 :: size |
| 265 |
|
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C myThid :: my Thread Id. number |
| 266 |
adcroft |
1.1 |
INTEGER myd1 |
| 267 |
jmc |
1.5 |
_RL arrayN(myd1,nSx,nSy), arrayS(myd1,nSx,nSy) |
| 268 |
|
|
_RL bufRecN(myd1,nSx,nSy), bufRecS(myd1,nSx,nSy) |
| 269 |
adcroft |
1.1 |
INTEGER myThid |
| 270 |
jmc |
1.6 |
CEOP |
| 271 |
adcroft |
1.1 |
|
| 272 |
jmc |
1.6 |
C !LOCAL VARIABLES: |
| 273 |
|
|
C I :: Loop index |
| 274 |
|
|
C bi, bj :: tile indices |
| 275 |
|
|
C biS, bjS :: South tile indices |
| 276 |
|
|
C biN, bjN :: North tile indices |
| 277 |
|
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C theProc :: \ |
| 278 |
|
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C theTag :: \ |
| 279 |
|
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C theType :: / Variables used in message building |
| 280 |
|
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C theSize :: / |
| 281 |
|
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C southCommMode :: variables holding type of communication |
| 282 |
|
|
C northCommMode :: a particular tile face uses. |
| 283 |
jmc |
1.4 |
INTEGER I |
| 284 |
adcroft |
1.1 |
INTEGER bi, bj, biS, bjS, biN, bjN |
| 285 |
|
|
INTEGER southCommMode |
| 286 |
|
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INTEGER northCommMode |
| 287 |
|
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#ifdef ALLOW_USE_MPI |
| 288 |
|
|
INTEGER theProc, theTag, theType, theSize, mpiRc |
| 289 |
|
|
#endif |
| 290 |
jmc |
1.6 |
#ifdef DBUG_EXCH_VEC |
| 291 |
|
|
INTEGER ioUnit |
| 292 |
|
|
#endif |
| 293 |
|
|
|
| 294 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 295 |
adcroft |
1.1 |
C-- Write data to exchange buffer |
| 296 |
jmc |
1.2 |
C Various actions are possible depending on the communication mode |
| 297 |
adcroft |
1.1 |
C as follows: |
| 298 |
|
|
C Mode Action |
| 299 |
|
|
C -------- --------------------------- |
| 300 |
|
|
C COMM_NONE Do nothing |
| 301 |
|
|
C |
| 302 |
|
|
C COMM_MSG Message passing communication ( e.g. MPI ) |
| 303 |
|
|
C Fill west send buffer from this tile. |
| 304 |
|
|
C Send data with tag identifying tile and direction. |
| 305 |
|
|
C Fill east send buffer from this tile. |
| 306 |
|
|
C Send data with tag identifying tile and direction. |
| 307 |
|
|
C |
| 308 |
|
|
C COMM_PUT "Put" communication ( UMP_, shmemput, etc... ) |
| 309 |
|
|
C Fill east receive buffer of south-neighbor tile |
| 310 |
|
|
C Fill west receive buffer of north-neighbor tile |
| 311 |
|
|
C Sync. memory |
| 312 |
|
|
C Write data-ready Ack for east edge of south-neighbor |
| 313 |
|
|
C tile |
| 314 |
|
|
C Write data-ready Ack for west edge of north-neighbor |
| 315 |
|
|
C tile |
| 316 |
|
|
C Sync. memory |
| 317 |
jmc |
1.6 |
|
| 318 |
|
|
#ifdef DBUG_EXCH_VEC |
| 319 |
|
|
ioUnit = errorMessageUnit |
| 320 |
|
|
#endif |
| 321 |
|
|
|
| 322 |
adcroft |
1.1 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 323 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 324 |
|
|
|
| 325 |
|
|
southCommMode = _tileCommModeS(bi,bj) |
| 326 |
|
|
northCommMode = _tileCommModeN(bi,bj) |
| 327 |
|
|
biN = _tileBiN(bi,bj) |
| 328 |
|
|
bjN = _tileBjN(bi,bj) |
| 329 |
|
|
biS = _tileBiS(bi,bj) |
| 330 |
|
|
bjS = _tileBjS(bi,bj) |
| 331 |
|
|
|
| 332 |
|
|
C o Send or Put south edge |
| 333 |
|
|
IF ( southCommMode .EQ. COMM_MSG ) THEN |
| 334 |
|
|
C Send the data |
| 335 |
|
|
#ifdef ALLOW_USE_MPI |
| 336 |
|
|
#ifndef ALWAYS_USE_MPI |
| 337 |
|
|
IF ( usingMPI ) THEN |
| 338 |
|
|
#endif |
| 339 |
|
|
theProc = tilePidS(bi,bj) |
| 340 |
|
|
theTag = _tileTagSendS(bi,bj) |
| 341 |
|
|
theSize = myd1 |
| 342 |
jmc |
1.6 |
theType = _MPI_TYPE_RL |
| 343 |
adcroft |
1.1 |
exchNReqsY(1,bi,bj) = exchNReqsY(1,bi,bj)+1 |
| 344 |
|
|
CALL MPI_Isend(arrayS(1,bi,bj), theSize, theType, |
| 345 |
|
|
& theProc, theTag, MPI_COMM_MODEL, |
| 346 |
|
|
& exchReqIdY(exchNReqsY(1,bi,bj),1,bi,bj), mpiRc) |
| 347 |
|
|
#ifndef ALWAYS_USE_MPI |
| 348 |
|
|
ENDIF |
| 349 |
|
|
#endif |
| 350 |
|
|
#endif /* ALLOW_USE_MPI */ |
| 351 |
jmc |
1.6 |
northRecvAck(1,biS,bjS) = 1 |
| 352 |
adcroft |
1.1 |
ELSEIF ( southCommMode .EQ. COMM_PUT ) THEN |
| 353 |
jmc |
1.5 |
c write(0,*) 'SEND_PUT_VEC_Y: copy N:',biS,bjS,' <- S:',bi,bj |
| 354 |
adcroft |
1.1 |
DO I=1,myd1 |
| 355 |
jmc |
1.5 |
bufRecN(I,biS,bjS) = arrayS(I,bi,bj) |
| 356 |
adcroft |
1.1 |
ENDDO |
| 357 |
jmc |
1.5 |
ELSEIF ( southCommMode .NE. COMM_NONE ) THEN |
| 358 |
adcroft |
1.1 |
STOP ' S/R EXCH: Invalid commS mode.' |
| 359 |
|
|
ENDIF |
| 360 |
|
|
|
| 361 |
|
|
C o Send or Put north edge |
| 362 |
|
|
IF ( northCommMode .EQ. COMM_MSG ) THEN |
| 363 |
|
|
C Send the data |
| 364 |
|
|
#ifdef ALLOW_USE_MPI |
| 365 |
|
|
#ifndef ALWAYS_USE_MPI |
| 366 |
|
|
IF ( usingMPI ) THEN |
| 367 |
|
|
#endif |
| 368 |
|
|
theProc = tilePidN(bi,bj) |
| 369 |
|
|
theTag = _tileTagSendN(bi,bj) |
| 370 |
|
|
theSize = myd1 |
| 371 |
jmc |
1.6 |
theType = _MPI_TYPE_RL |
| 372 |
adcroft |
1.1 |
exchNReqsY(1,bi,bj) = exchNReqsY(1,bi,bj)+1 |
| 373 |
|
|
CALL MPI_Isend(arrayN(1,bi,bj), theSize, theType, |
| 374 |
|
|
& theProc, theTag, MPI_COMM_MODEL, |
| 375 |
|
|
& exchReqIdY(exchNReqsY(1,bi,bj),1,bi,bj), mpiRc) |
| 376 |
|
|
#ifndef ALWAYS_USE_MPI |
| 377 |
|
|
ENDIF |
| 378 |
|
|
#endif |
| 379 |
|
|
#endif /* ALLOW_USE_MPI */ |
| 380 |
jmc |
1.6 |
southRecvAck(1,biN,bjN) = 1 |
| 381 |
adcroft |
1.1 |
ELSEIF ( northCommMode .EQ. COMM_PUT ) THEN |
| 382 |
jmc |
1.5 |
c write(0,*) 'SEND_PUT_VEC_Y: copy S:',biN,bjN,' <- N:',bi,bj |
| 383 |
adcroft |
1.1 |
DO I=1,myd1 |
| 384 |
jmc |
1.5 |
bufRecS(I,biN,bjN) = arrayN(I,bi,bj) |
| 385 |
adcroft |
1.1 |
ENDDO |
| 386 |
jmc |
1.5 |
ELSEIF ( northCommMode .NE. COMM_NONE ) THEN |
| 387 |
adcroft |
1.1 |
STOP ' S/R EXCH: Invalid commN mode.' |
| 388 |
|
|
ENDIF |
| 389 |
|
|
|
| 390 |
|
|
ENDDO |
| 391 |
|
|
ENDDO |
| 392 |
|
|
|
| 393 |
|
|
C-- Signal completetion ( making sure system-wide memory state is |
| 394 |
|
|
C-- consistent ). |
| 395 |
|
|
|
| 396 |
|
|
C ** NOTE ** We are relying on being able to produce strong-ordered |
| 397 |
|
|
C memory semantics here. In other words we assume that there is a |
| 398 |
|
|
C mechanism which can ensure that by the time the Ack is seen the |
| 399 |
|
|
C overlap region data that will be exchanged is up to date. |
| 400 |
|
|
IF ( exchNeedsMemSync ) CALL MEMSYNC |
| 401 |
|
|
|
| 402 |
|
|
DO bj=myByLo(myThid),myByHi(myThid) |
| 403 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 404 |
|
|
biN = _tileBiN(bi,bj) |
| 405 |
|
|
bjN = _tileBjN(bi,bj) |
| 406 |
|
|
biS = _tileBiS(bi,bj) |
| 407 |
|
|
bjS = _tileBjS(bi,bj) |
| 408 |
jmc |
1.6 |
southCommMode = _tileCommModeS(bi,bj) |
| 409 |
adcroft |
1.1 |
northCommMode = _tileCommModeN(bi,bj) |
| 410 |
jmc |
1.6 |
IF ( southCommMode .EQ. COMM_PUT ) northRecvAck(1,biS,bjS) = 1 |
| 411 |
|
|
IF ( northCommMode .EQ. COMM_PUT ) southRecvAck(1,biN,bjN) = 1 |
| 412 |
|
|
IF ( southCommMode .EQ. COMM_GET ) northRecvAck(1,biS,bjS) = 1 |
| 413 |
|
|
IF ( northCommMode .EQ. COMM_GET ) southRecvAck(1,biN,bjN) = 1 |
| 414 |
adcroft |
1.1 |
ENDDO |
| 415 |
|
|
ENDDO |
| 416 |
|
|
|
| 417 |
|
|
C-- Make sure "ack" setting is seen system-wide. |
| 418 |
|
|
C Here strong-ordering is not an issue but we want to make |
| 419 |
|
|
C sure that processes that might spin on the above Ack settings |
| 420 |
|
|
C will see the setting. |
| 421 |
|
|
C ** NOTE ** On some machines we wont spin on the Ack setting |
| 422 |
|
|
C ( particularly the T90 ), instead we will use s system barrier. |
| 423 |
jmc |
1.2 |
C On the T90 the system barrier is very fast and switches out the |
| 424 |
adcroft |
1.1 |
C thread while it waits. On most machines the system barrier |
| 425 |
|
|
C is much too slow and if we own the machine and have one thread |
| 426 |
|
|
C per process preemption is not a problem. |
| 427 |
|
|
IF ( exchNeedsMemSync ) CALL MEMSYNC |
| 428 |
|
|
|
| 429 |
jmc |
1.2 |
RETURN |
| 430 |
adcroft |
1.1 |
END |
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