| 1 |
jmc |
1.10 |
C $Header: /u/gcmpack/MITgcm/pkg/flt/exch_recv_get_vec.F,v 1.9 2011/12/22 19:04:45 jmc Exp $ |
| 2 |
jmc |
1.2 |
C $Name: $ |
| 3 |
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| 4 |
jmc |
1.5 |
#include "CPP_EEOPTIONS.h" |
| 5 |
jmc |
1.8 |
#undef EXCH_USE_SPINNING |
| 6 |
jmc |
1.5 |
#undef DBUG_EXCH_VEC |
| 7 |
jmc |
1.3 |
|
| 8 |
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C-- Contents |
| 9 |
jmc |
1.10 |
C-- o EXCH_RECV_GET_VEC_X_RL |
| 10 |
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C-- o EXCH_RECV_GET_VEC_Y_RL |
| 11 |
jmc |
1.3 |
|
| 12 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 13 |
jmc |
1.5 |
CBOP 0 |
| 14 |
jmc |
1.10 |
C !ROUTINE: EXCH_RECV_GET_VEC_X_RL |
| 15 |
adcroft |
1.1 |
|
| 16 |
jmc |
1.5 |
C !INTERFACE: |
| 17 |
jmc |
1.10 |
SUBROUTINE EXCH_RECV_GET_VEC_X_RL( |
| 18 |
jmc |
1.4 |
U arrayE, arrayW, |
| 19 |
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I myd1, myThid ) |
| 20 |
jmc |
1.5 |
C !DESCRIPTION: |
| 21 |
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C *==========================================================* |
| 22 |
jmc |
1.10 |
C | SUBROUTINE EXCH_RECV_GET_VEC_X_RL |
| 23 |
jmc |
1.5 |
C | o "Receive" or "Get" X edges for RL array. |
| 24 |
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C *==========================================================* |
| 25 |
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C | Routine that invokes actual message passing receive |
| 26 |
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C | of data to update buffer in X direction |
| 27 |
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C *==========================================================* |
| 28 |
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| 29 |
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C !USES: |
| 30 |
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 |
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| 38 |
jmc |
1.5 |
C !INPUT/OUTPUT PARAMETERS: |
| 39 |
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C arrayE :: buffer array to collect Eastern Neighbour values |
| 40 |
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C arrayW :: buffer array to collect Western Neighbour values |
| 41 |
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C myd1 :: size |
| 42 |
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C myThid :: my Thread Id. number |
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adcroft |
1.1 |
INTEGER myd1 |
| 44 |
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_RL arrayE(myd1, nSx, nSy), arrayW(myd1, nSx, nSy) |
| 45 |
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INTEGER myThid |
| 46 |
jmc |
1.5 |
CEOP |
| 47 |
adcroft |
1.1 |
|
| 48 |
jmc |
1.5 |
C !LOCAL VARIABLES: |
| 49 |
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C bi, bj :: tile indices |
| 50 |
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C biW, bjW :: West tile indices |
| 51 |
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C biE, bjE :: East tile indices |
| 52 |
cnh |
1.6 |
C theProc :: Variables used in message building |
| 53 |
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C theTag :: Variables used in message building |
| 54 |
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C theType :: Variables used in message building |
| 55 |
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C theSize :: Variables used in message building |
| 56 |
jmc |
1.5 |
C westCommMode :: variables holding type of communication |
| 57 |
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C eastCommMode :: a particular tile face uses. |
| 58 |
jmc |
1.4 |
INTEGER bi, bj |
| 59 |
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c INTEGER biW, bjW, biE, bjE |
| 60 |
adcroft |
1.1 |
INTEGER westCommMode |
| 61 |
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INTEGER eastCommMode |
| 62 |
jmc |
1.9 |
INTEGER ioUnit |
| 63 |
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#ifdef EXCH_USE_SPINNING |
| 64 |
adcroft |
1.1 |
INTEGER spinCount |
| 65 |
jmc |
1.9 |
#endif |
| 66 |
adcroft |
1.1 |
#ifdef ALLOW_USE_MPI |
| 67 |
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INTEGER theProc, theTag, theType, theSize |
| 68 |
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INTEGER mpiStatus(MPI_STATUS_SIZE,4), mpiRc |
| 69 |
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#endif |
| 70 |
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| 71 |
jmc |
1.2 |
C-- Under a "put" scenario we |
| 72 |
adcroft |
1.1 |
C-- i. set completetion signal for buffer we put into. |
| 73 |
jmc |
1.2 |
C-- ii. wait for completetion signal indicating data has been put in |
| 74 |
adcroft |
1.1 |
C-- our buffer. |
| 75 |
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C-- Under a messaging mode we "receive" the message. |
| 76 |
jmc |
1.5 |
C-- Under a "get" scenario <= not implemented, we |
| 77 |
adcroft |
1.1 |
C-- i. Check that the data is ready. |
| 78 |
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C-- ii. Read the data. |
| 79 |
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C-- iii. Set data read flag + memory sync. |
| 80 |
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jmc |
1.5 |
ioUnit = errorMessageUnit |
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adcroft |
1.1 |
|
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jmc |
1.8 |
_BEGIN_MASTER(myThid) |
| 84 |
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| 85 |
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DO bj=1,nSy |
| 86 |
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DO bi=1,nSx |
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adcroft |
1.1 |
westCommMode = _tileCommModeW(bi,bj) |
| 88 |
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eastCommMode = _tileCommModeE(bi,bj) |
| 89 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 90 |
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write(ioUnit,'(A,5I6)') 'RECV_X,0 :',myProcId,bi,bj |
| 91 |
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#endif |
| 92 |
jmc |
1.4 |
c biE = _tileBiE(bi,bj) |
| 93 |
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c bjE = _tileBjE(bi,bj) |
| 94 |
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c biW = _tileBiW(bi,bj) |
| 95 |
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c bjW = _tileBjW(bi,bj) |
| 96 |
adcroft |
1.1 |
IF ( westCommMode .EQ. COMM_MSG ) THEN |
| 97 |
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#ifdef ALLOW_USE_MPI |
| 98 |
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IF ( usingMPI ) THEN |
| 99 |
jmc |
1.10 |
theProc = tilePidW(bi,bj) |
| 100 |
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theTag = _tileTagRecvW(bi,bj) |
| 101 |
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theType = _MPI_TYPE_RL |
| 102 |
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theSize = myd1 |
| 103 |
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#ifdef DBUG_EXCH_VEC |
| 104 |
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write(ioUnit,'(A,5I5,I8)') 'qq2xW: ',myProcId,bi,bj, |
| 105 |
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& theProc,theTag,theSize |
| 106 |
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#endif |
| 107 |
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CALL MPI_Recv( arrayW(1,bi,bj), theSize, theType, |
| 108 |
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& theProc, theTag, MPI_COMM_MODEL, |
| 109 |
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& mpiStatus, mpiRc ) |
| 110 |
adcroft |
1.1 |
c if (theProc .eq. 0 .or. theProc .eq. 2) then |
| 111 |
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c if (arrayW(1,bi,bj) .ne. 0.) then |
| 112 |
jmc |
1.5 |
c write(errormessageunit,*) 'qq2y: ',myProcId, |
| 113 |
adcroft |
1.1 |
c & theProc,theTag,theSize,(arrayW(i,bi,bj),i=1,32) |
| 114 |
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c else |
| 115 |
jmc |
1.5 |
c write(errormessageunit,*) 'qq2n: ',myProcId, |
| 116 |
adcroft |
1.1 |
c & theProc,theTag,theSize,(arrayW(i,bi,bj),i=1,32) |
| 117 |
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c endif |
| 118 |
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c endif |
| 119 |
jmc |
1.5 |
ENDIF |
| 120 |
adcroft |
1.1 |
#endif /* ALLOW_USE_MPI */ |
| 121 |
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ENDIF |
| 122 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 123 |
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write(ioUnit,'(A,5I6)') 'RECV_X,1 :',myProcId,bi,bj |
| 124 |
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#endif |
| 125 |
jmc |
1.10 |
|
| 126 |
adcroft |
1.1 |
IF ( eastCommMode .EQ. COMM_MSG ) THEN |
| 127 |
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#ifdef ALLOW_USE_MPI |
| 128 |
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IF ( usingMPI ) THEN |
| 129 |
jmc |
1.10 |
theProc = tilePidE(bi,bj) |
| 130 |
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theTag = _tileTagRecvE(bi,bj) |
| 131 |
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theType = _MPI_TYPE_RL |
| 132 |
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theSize = myd1 |
| 133 |
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#ifdef DBUG_EXCH_VEC |
| 134 |
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write(ioUnit,'(A,5I5,I8)') 'qq2xE: ',myProcId,bi,bj, |
| 135 |
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& theProc,theTag,theSize |
| 136 |
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#endif |
| 137 |
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CALL MPI_Recv( arrayE(1,bi,bj), theSize, theType, |
| 138 |
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& theProc, theTag, MPI_COMM_MODEL, |
| 139 |
|
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& mpiStatus, mpiRc ) |
| 140 |
jmc |
1.5 |
ENDIF |
| 141 |
adcroft |
1.1 |
#endif /* ALLOW_USE_MPI */ |
| 142 |
|
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ENDIF |
| 143 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 144 |
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write(ioUnit,'(A,5I6)') 'RECV_X,2 :',myProcId,bi,bj |
| 145 |
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#endif |
| 146 |
adcroft |
1.1 |
ENDDO |
| 147 |
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ENDDO |
| 148 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 149 |
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write(ioUnit,'(A,5I6,I12)') 'RECV_X:',myProcId |
| 150 |
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#endif |
| 151 |
adcroft |
1.1 |
|
| 152 |
jmc |
1.8 |
IF ( .NOT.exchUsesBarrier ) THEN |
| 153 |
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DO bj=1,nSy |
| 154 |
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DO bi=1,nSx |
| 155 |
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IF ( exchNReqsX(1,bi,bj) .GT. 0 ) THEN |
| 156 |
|
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#ifdef ALLOW_USE_MPI |
| 157 |
jmc |
1.10 |
IF ( usingMPI ) |
| 158 |
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& CALL MPI_Waitall( exchNReqsX(1,bi,bj), exchReqIdX(1,1,bi,bj), |
| 159 |
jmc |
1.8 |
& mpiStatus, mpiRC ) |
| 160 |
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#endif /* ALLOW_USE_MPI */ |
| 161 |
|
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ENDIF |
| 162 |
|
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C Clear outstanding requests counter |
| 163 |
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exchNReqsX(1,bi,bj) = 0 |
| 164 |
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ENDDO |
| 165 |
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ENDDO |
| 166 |
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ENDIF |
| 167 |
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| 168 |
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_END_MASTER(myThid) |
| 169 |
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| 170 |
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C-- need to sync threads after master has received data ; |
| 171 |
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C (done after mpi waitall in case waitall is really needed) |
| 172 |
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_BARRIER |
| 173 |
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|
| 174 |
|
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C-- Threads wait for buffers I am going to read to be ready. |
| 175 |
|
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C note: added BARRIER in exch_send_put S/R and here above (message |
| 176 |
|
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C mode) so that we no longer needs this (undef EXCH_USE_SPINNING) |
| 177 |
|
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#ifdef EXCH_USE_SPINNING |
| 178 |
adcroft |
1.1 |
IF ( exchUsesBarrier ) THEN |
| 179 |
|
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C o On some machines ( T90 ) use system barrier rather than spinning. |
| 180 |
|
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CALL BARRIER( myThid ) |
| 181 |
|
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ELSE |
| 182 |
|
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C o Spin waiting for completetion flag. This avoids a global-lock |
| 183 |
|
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C i.e. we only lock waiting for data that we need. |
| 184 |
|
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DO bj=myByLo(myThid),myByHi(myThid) |
| 185 |
|
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 186 |
|
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spinCount = 0 |
| 187 |
|
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westCommMode = _tileCommModeW(bi,bj) |
| 188 |
|
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eastCommMode = _tileCommModeE(bi,bj) |
| 189 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 190 |
|
|
write(ioUnit,'(A,5I6,I12)') 'spin:', myProcId,bi,bj, |
| 191 |
|
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& westRecvAck(1,bi,bj), eastRecvAck(1,bi,bj), spinCount |
| 192 |
|
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#endif |
| 193 |
adcroft |
1.1 |
10 CONTINUE |
| 194 |
jmc |
1.7 |
CALL FOOL_THE_COMPILER( spinCount ) |
| 195 |
adcroft |
1.1 |
spinCount = spinCount+1 |
| 196 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 197 |
|
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write(ioUnit,'(A,5I6,I12)') 'spin:', myProcId,bi,bj, |
| 198 |
|
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& westRecvAck(1,bi,bj), eastRecvAck(1,bi,bj), spinCount |
| 199 |
|
|
IF ( myThid.EQ.1 .AND. spinCount.GT. _EXCH_SPIN_LIMIT ) THEN |
| 200 |
|
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STOP ' S/R EXCH_RECV_GET_X: spinCount > _EXCH_SPIN_LIMIT' |
| 201 |
|
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ENDIF |
| 202 |
|
|
#endif |
| 203 |
|
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IF ( westRecvAck(1,bi,bj) .EQ. 0 ) GOTO 10 |
| 204 |
|
|
IF ( eastRecvAck(1,bi,bj) .EQ. 0 ) GOTO 10 |
| 205 |
adcroft |
1.1 |
C Clear outstanding requests |
| 206 |
jmc |
1.5 |
westRecvAck(1,bi,bj) = 0 |
| 207 |
|
|
eastRecvAck(1,bi,bj) = 0 |
| 208 |
adcroft |
1.1 |
ENDDO |
| 209 |
|
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ENDDO |
| 210 |
|
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ENDIF |
| 211 |
jmc |
1.8 |
#endif /* EXCH_USE_SPINNING */ |
| 212 |
adcroft |
1.1 |
|
| 213 |
|
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RETURN |
| 214 |
|
|
END |
| 215 |
|
|
|
| 216 |
jmc |
1.3 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 217 |
jmc |
1.5 |
CBOP 0 |
| 218 |
jmc |
1.10 |
C !ROUTINE: EXCH_RECV_GET_VEC_Y_RL |
| 219 |
adcroft |
1.1 |
|
| 220 |
jmc |
1.5 |
C !INTERFACE: |
| 221 |
jmc |
1.10 |
SUBROUTINE EXCH_RECV_GET_VEC_Y_RL( |
| 222 |
jmc |
1.4 |
U arrayN, arrayS, |
| 223 |
|
|
I myd1, myThid ) |
| 224 |
jmc |
1.5 |
C !DESCRIPTION: |
| 225 |
|
|
C *==========================================================* |
| 226 |
jmc |
1.10 |
C | SUBROUTINE EXCH_RECV_GET_VEC_Y_RL |
| 227 |
jmc |
1.5 |
C | o "Receive" or "Get" Y edges for RL array. |
| 228 |
|
|
C *==========================================================* |
| 229 |
|
|
C | Routine that invokes actual message passing receive |
| 230 |
|
|
C | of data to update buffer in Y direction |
| 231 |
|
|
C *==========================================================* |
| 232 |
|
|
|
| 233 |
|
|
C !USES: |
| 234 |
adcroft |
1.1 |
IMPLICIT NONE |
| 235 |
|
|
|
| 236 |
|
|
C == Global variables == |
| 237 |
|
|
#include "SIZE.h" |
| 238 |
|
|
#include "EEPARAMS.h" |
| 239 |
|
|
#include "EESUPPORT.h" |
| 240 |
|
|
#include "EXCH.h" |
| 241 |
|
|
|
| 242 |
jmc |
1.5 |
C !INPUT/OUTPUT PARAMETERS: |
| 243 |
|
|
C arrayN :: buffer array to collect Northern Neighbour values |
| 244 |
|
|
C arrayS :: buffer array to collect Southern Neighbour values |
| 245 |
|
|
C myd1 :: size |
| 246 |
|
|
C myThid :: my Thread Id. number |
| 247 |
adcroft |
1.1 |
INTEGER myd1 |
| 248 |
|
|
_RL arrayN(myd1, nSx, nSy), arrayS(myd1, nSx, nSy) |
| 249 |
|
|
INTEGER myThid |
| 250 |
jmc |
1.5 |
CEOP |
| 251 |
adcroft |
1.1 |
|
| 252 |
jmc |
1.5 |
C !LOCAL VARIABLES: |
| 253 |
|
|
C bi, bj :: tile indices |
| 254 |
|
|
C biS, bjS :: South tile indices |
| 255 |
|
|
C biN, bjN :: North tile indices |
| 256 |
cnh |
1.6 |
C theProc :: Variables used in message building |
| 257 |
|
|
C theTag :: Variables used in message building |
| 258 |
|
|
C theType :: Variables used in message building |
| 259 |
|
|
C theSize :: Variables used in message building |
| 260 |
jmc |
1.5 |
C southCommMode :: variables holding type of communication |
| 261 |
|
|
C northCommMode :: a particular tile face uses. |
| 262 |
jmc |
1.4 |
INTEGER bi, bj |
| 263 |
|
|
c INTEGER biS, bjS, biN, bjN |
| 264 |
adcroft |
1.1 |
INTEGER southCommMode |
| 265 |
|
|
INTEGER northCommMode |
| 266 |
jmc |
1.9 |
INTEGER ioUnit |
| 267 |
|
|
#ifdef EXCH_USE_SPINNING |
| 268 |
adcroft |
1.1 |
INTEGER spinCount |
| 269 |
jmc |
1.9 |
#endif |
| 270 |
adcroft |
1.1 |
#ifdef ALLOW_USE_MPI |
| 271 |
|
|
INTEGER theProc, theTag, theType, theSize |
| 272 |
|
|
INTEGER mpiStatus(MPI_STATUS_SIZE,4), mpiRc |
| 273 |
|
|
#endif |
| 274 |
|
|
|
| 275 |
jmc |
1.2 |
C-- Under a "put" scenario we |
| 276 |
adcroft |
1.1 |
C-- i. set completetion signal for buffer we put into. |
| 277 |
jmc |
1.2 |
C-- ii. wait for completetion signal indicating data has been put in |
| 278 |
adcroft |
1.1 |
C-- our buffer. |
| 279 |
|
|
C-- Under a messaging mode we "receive" the message. |
| 280 |
jmc |
1.5 |
C-- Under a "get" scenario <= not implemented, we |
| 281 |
adcroft |
1.1 |
C-- i. Check that the data is ready. |
| 282 |
|
|
C-- ii. Read the data. |
| 283 |
|
|
C-- iii. Set data read flag + memory sync. |
| 284 |
|
|
|
| 285 |
jmc |
1.5 |
ioUnit = errorMessageUnit |
| 286 |
adcroft |
1.1 |
|
| 287 |
jmc |
1.8 |
_BEGIN_MASTER(myThid) |
| 288 |
|
|
|
| 289 |
|
|
DO bj=1,nSy |
| 290 |
|
|
DO bi=1,nSx |
| 291 |
adcroft |
1.1 |
southCommMode = _tileCommModeS(bi,bj) |
| 292 |
|
|
northCommMode = _tileCommModeN(bi,bj) |
| 293 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 294 |
|
|
write(ioUnit,'(A,5I6)') 'RECV_Y,0 :',myProcId,bi,bj |
| 295 |
|
|
#endif |
| 296 |
jmc |
1.4 |
c biN = _tileBiN(bi,bj) |
| 297 |
|
|
c bjN = _tileBjN(bi,bj) |
| 298 |
|
|
c biS = _tileBiS(bi,bj) |
| 299 |
|
|
c bjS = _tileBjS(bi,bj) |
| 300 |
adcroft |
1.1 |
IF ( southCommMode .EQ. COMM_MSG ) THEN |
| 301 |
|
|
#ifdef ALLOW_USE_MPI |
| 302 |
|
|
IF ( usingMPI ) THEN |
| 303 |
jmc |
1.10 |
theProc = tilePidS(bi,bj) |
| 304 |
|
|
theTag = _tileTagRecvS(bi,bj) |
| 305 |
|
|
theType = _MPI_TYPE_RL |
| 306 |
|
|
theSize = myd1 |
| 307 |
|
|
CALL MPI_Recv( arrayS(1,bi,bj), theSize, theType, |
| 308 |
|
|
& theProc, theTag, MPI_COMM_MODEL, |
| 309 |
|
|
& mpiStatus, mpiRc ) |
| 310 |
jmc |
1.5 |
ENDIF |
| 311 |
adcroft |
1.1 |
#endif /* ALLOW_USE_MPI */ |
| 312 |
|
|
ENDIF |
| 313 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 314 |
|
|
write(ioUnit,'(A,5I6)') 'RECV_Y,1 :',myProcId,bi,bj |
| 315 |
|
|
#endif |
| 316 |
jmc |
1.10 |
|
| 317 |
adcroft |
1.1 |
IF ( northCommMode .EQ. COMM_MSG ) THEN |
| 318 |
|
|
#ifdef ALLOW_USE_MPI |
| 319 |
|
|
IF ( usingMPI ) THEN |
| 320 |
jmc |
1.10 |
theProc = tilePidN(bi,bj) |
| 321 |
|
|
theTag = _tileTagRecvN(bi,bj) |
| 322 |
|
|
theType = _MPI_TYPE_RL |
| 323 |
|
|
theSize = myd1 |
| 324 |
|
|
CALL MPI_Recv( arrayN(1,bi,bj), theSize, theType, |
| 325 |
|
|
& theProc, theTag, MPI_COMM_MODEL, |
| 326 |
|
|
& mpiStatus, mpiRc ) |
| 327 |
jmc |
1.5 |
ENDIF |
| 328 |
adcroft |
1.1 |
#endif /* ALLOW_USE_MPI */ |
| 329 |
|
|
ENDIF |
| 330 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 331 |
|
|
write(ioUnit,'(A,5I6)') 'RECV_Y,2 :',myProcId,bi,bj |
| 332 |
|
|
#endif |
| 333 |
adcroft |
1.1 |
ENDDO |
| 334 |
|
|
ENDDO |
| 335 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 336 |
|
|
write(ioUnit,'(A,5I6,I12)') 'RECV_Y:',myProcId |
| 337 |
|
|
#endif |
| 338 |
adcroft |
1.1 |
|
| 339 |
jmc |
1.8 |
C-- Processes wait for buffers I am going to read to be ready. |
| 340 |
|
|
IF ( .NOT.exchUsesBarrier ) THEN |
| 341 |
|
|
DO bj=1,nSy |
| 342 |
|
|
DO bi=1,nSx |
| 343 |
|
|
IF ( exchNReqsY(1,bi,bj) .GT. 0 ) THEN |
| 344 |
|
|
#ifdef ALLOW_USE_MPI |
| 345 |
jmc |
1.10 |
IF ( usingMPI ) |
| 346 |
|
|
& CALL MPI_Waitall( exchNReqsY(1,bi,bj), exchReqIdY(1,1,bi,bj), |
| 347 |
jmc |
1.8 |
& mpiStatus, mpiRC ) |
| 348 |
|
|
#endif /* ALLOW_USE_MPI */ |
| 349 |
|
|
ENDIF |
| 350 |
|
|
C Clear outstanding requests counter |
| 351 |
|
|
exchNReqsY(1,bi,bj) = 0 |
| 352 |
|
|
ENDDO |
| 353 |
|
|
ENDDO |
| 354 |
|
|
ENDIF |
| 355 |
|
|
|
| 356 |
|
|
_END_MASTER(myThid) |
| 357 |
|
|
|
| 358 |
|
|
C-- need to sync threads after master has received data ; |
| 359 |
|
|
C (done after mpi waitall in case waitall is really needed) |
| 360 |
|
|
_BARRIER |
| 361 |
|
|
|
| 362 |
|
|
C-- Threads wait for buffers I am going to read to be ready. |
| 363 |
|
|
C note: added BARRIER in exch_send_put S/R and here above (message |
| 364 |
|
|
C mode) so that we no longer needs this (undef EXCH_USE_SPINNING) |
| 365 |
|
|
#ifdef EXCH_USE_SPINNING |
| 366 |
adcroft |
1.1 |
IF ( exchUsesBarrier ) THEN |
| 367 |
|
|
C o On some machines ( T90 ) use system barrier rather than spinning. |
| 368 |
|
|
CALL BARRIER( myThid ) |
| 369 |
|
|
ELSE |
| 370 |
|
|
C o Spin waiting for completetion flag. This avoids a global-lock |
| 371 |
|
|
C i.e. we only lock waiting for data that we need. |
| 372 |
|
|
DO bj=myByLo(myThid),myByHi(myThid) |
| 373 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 374 |
|
|
spinCount = 0 |
| 375 |
|
|
southCommMode = _tileCommModeS(bi,bj) |
| 376 |
|
|
northCommMode = _tileCommModeN(bi,bj) |
| 377 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 378 |
|
|
write(ioUnit,'(A,5I6,I12)') 'spin:', myProcId,bi,bj, |
| 379 |
|
|
& southRecvAck(1,bi,bj), northRecvAck(1,bi,bj), spinCount |
| 380 |
|
|
#endif |
| 381 |
adcroft |
1.1 |
10 CONTINUE |
| 382 |
jmc |
1.7 |
CALL FOOL_THE_COMPILER( spinCount ) |
| 383 |
adcroft |
1.1 |
spinCount = spinCount+1 |
| 384 |
jmc |
1.5 |
#ifdef DBUG_EXCH_VEC |
| 385 |
|
|
write(ioUnit,'(A,5I6,I12)') 'spin:', myProcId,bi,bj, |
| 386 |
|
|
& southRecvAck(1,bi,bj), northRecvAck(1,bi,bj), spinCount |
| 387 |
|
|
IF ( myThid.EQ.1 .AND. spinCount.GT. _EXCH_SPIN_LIMIT ) THEN |
| 388 |
|
|
STOP ' S/R EXCH_RECV_GET_X: spinCount > _EXCH_SPIN_LIMIT' |
| 389 |
|
|
ENDIF |
| 390 |
|
|
#endif |
| 391 |
|
|
IF ( southRecvAck(1,bi,bj) .EQ. 0 ) GOTO 10 |
| 392 |
|
|
IF ( northRecvAck(1,bi,bj) .EQ. 0 ) GOTO 10 |
| 393 |
adcroft |
1.1 |
C Clear outstanding requests |
| 394 |
jmc |
1.5 |
southRecvAck(1,bi,bj) = 0 |
| 395 |
|
|
northRecvAck(1,bi,bj) = 0 |
| 396 |
adcroft |
1.1 |
ENDDO |
| 397 |
|
|
ENDDO |
| 398 |
|
|
ENDIF |
| 399 |
jmc |
1.8 |
#endif /* EXCH_USE_SPINNING */ |
| 400 |
adcroft |
1.1 |
|
| 401 |
|
|
RETURN |
| 402 |
|
|
END |
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