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C $Header: /u/gcmpack/models/MITgcmUV/eesupp/src/exch_control.F,v 1.3 1999/05/24 15:17:10 adcroft Exp $ |
| 2 |
|
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C MITgcmUV Exchange routine |
| 4 |
C ------------------------- |
| 5 |
C These routines include support for arrays with different |
| 6 |
C overlap extents and a mechanism to allow reverse mode |
| 7 |
C exchanges for adjoint based minimisation experiments. |
| 8 |
C Differing extents for array overlap regions allows for example |
| 9 |
C the conjugate gradient solver to be optimised for edge |
| 10 |
C exchages of width one whilst for Shapiro filtered |
| 11 |
C atmospheric fileds overlap regions of 8 or more can |
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C be defined. |
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C Another important new feature is a tile by tile definition |
| 14 |
C of the class of exchange operation used to update the |
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C tile. This provides support for partially tiled regular |
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C domains where land-filled tiles are eliminated. |
| 17 |
C Communication between tiles |
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C can be based on any of |
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C 1. message passing. |
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C 2. writes to remote memory. |
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C 3. direct reads from remote tiles. |
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C The class of communication utilised is specified on a |
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C tile by tile basis. So that one face of a tile can |
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C exchange via MPI, another via UMP, another via shared |
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C memory and another not at all. The only requirement is that |
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C of symmetry i.e. if one tile sends its data to another tile via |
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C some mechanism the "sent to" tile must receive the data by the |
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C same mechanism. There is no support for multiple communication |
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C channels for a single tile face. |
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C To support this a tile has the following attributes associated |
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C with it: |
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C tileNo - A unique number identifying the tile |
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C tileNoW - tileNo for the tile to my west |
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C tileNoN - tileNo for the tile to my north |
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C tileNoS - tileNo for the tile to my south |
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C tileNoE - tileNo for the tile to my east |
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C tilePid - Process id for this tile |
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C tilePidW - Process id for tile to west |
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C tilePidE - Process id for tile to east |
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C tilePidN - Process id for tile to north |
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C tilePidS - Process id for tile to south |
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C tileCommModeW - Style of communication used to west |
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C tileCommModeE - Style of communication used to east |
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C tileCommModeN - Style of communication used to north |
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C tileCommModeS - Style of communication used to south |
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C tileTagSendW - Tag for identifying send from tiles west |
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C communication "channel". |
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C tileTagSendE - Tag for identifying send from tiles east |
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C communication "channel". |
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C tileTagSendN - Tag for identifying send from tiles north |
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C communication "channel". |
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C tileTagSendS - Tag for identifying send from tiles south |
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C communication "channel". |
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C tileTagRecvW - Tag for identifying send from tiles west |
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C communication "channel". |
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C tileTagRecvE - Tag for identifying send from tiles east |
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C communication "channel". |
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C tileTagRecvN - Tag for identifying send from tiles north |
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C communication "channel". |
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C tileTagRecvS - Tag for identifying send from tiles south |
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C communication "channel". |
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C tileB[ij]W - bi and bj index for tile to west |
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C tileB[ij]E - bi and bj index for tile to east |
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C tileB[ij]N - bi and bj index for tile to north |
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C tileB[ij]S - bi and bj index for tile to south |
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C The code in here although intricate is fairly |
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C straightforward. There are four routines, one |
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C for each of the data patterns we wish to do overlap |
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C updates on - as listed below. Each routine has two |
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C parts. The first part does overlap updates to and from |
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C remote "processes", that is processes who do not truly |
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C share the address space of this process. This part |
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C requires a facility like MPI, CRAY shmem, Memory Channel UMP, |
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C VMMC VIA. In the case of a simple |
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C serial execution nothing happens in this part. |
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C The second part of each routine does the true shared memory |
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C overlap copying i.e. copying from one part of array phi |
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C to another part. This part is always active, in the case |
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C of a single threaded messaging code, however, this part |
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C will not do any copies as all edges will be flagged as using |
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C for example MPI. |
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C |
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|
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|
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CStartOfInterface |
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SUBROUTINE EXCH_RL( |
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U array, |
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I myOLw, myOLe, myOLn, myOLs, myNz, |
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I exchWidthX, exchWidthY, |
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I simulationMode, cornerMode, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE EXCH_RL | |
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C | o Control edge exchanges for RL array. | |
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C |==========================================================| |
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C | | |
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C | Controlling routine for exchange of XY edges of an array | |
| 97 |
C | distributed in X and Y. The routine interfaces to | |
| 98 |
C | communication routines that can use messages passing | |
| 99 |
C | exchanges, put type exchanges or get type exchanges. | |
| 100 |
C | This allows anything from MPI to raw memory channel to | |
| 101 |
C | memmap segments to be used as a inter-process and/or | |
| 102 |
C | inter-thread communiation and synchronisation | |
| 103 |
C | mechanism. | |
| 104 |
C | Notes -- | |
| 105 |
C | 1. Some low-level mechanisms such as raw memory-channel | |
| 106 |
C | or SGI/CRAY shmem put do not have direct Fortran bindings| |
| 107 |
C | and are invoked through C stub routines. | |
| 108 |
C | 2. Although this routine is fairly general but it does | |
| 109 |
C | require nSx and nSy are the same for all innvocations. | |
| 110 |
C | There are many common data structures ( myByLo, | |
| 111 |
C | westCommunicationMode, mpiIdW etc... ) tied in with | |
| 112 |
C | (nSx,nSy). To support arbitray nSx and nSy would require | |
| 113 |
C | general forms of these. | |
| 114 |
C | | |
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C \==========================================================/ |
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IMPLICIT NONE |
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|
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C == Global data == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "EESUPPORT.h" |
| 122 |
#include "EXCH.h" |
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|
| 124 |
C == Routine arguments == |
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C array - Array with edges to exchange. |
| 126 |
C myOLw - West, East, North and South overlap region sizes. |
| 127 |
C myOLe |
| 128 |
C myOLn |
| 129 |
C myOLs |
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C exchWidthX - Width of data region exchanged in X. |
| 131 |
C exchWidthY - Width of data region exchanged in Y. |
| 132 |
C Note -- |
| 133 |
C 1. In theory one could have a send width and |
| 134 |
C a receive width for each face of each tile. The only |
| 135 |
C restriction woul be that the send width of one |
| 136 |
C face should equal the receive width of the sent to |
| 137 |
C tile face. Dont know if this would be useful. I |
| 138 |
C have left it out for now as it requires additional |
| 139 |
C bookeeping. |
| 140 |
C simulationMode - Forward or reverse mode exchange ( provides |
| 141 |
C support for adjoint integration of code. ) |
| 142 |
C cornerMode - Flag indicating whether corner updates are |
| 143 |
C needed. |
| 144 |
C myThid - Thread number of this instance of S/R EXCH... |
| 145 |
INTEGER myOLw |
| 146 |
INTEGER myOLe |
| 147 |
INTEGER myOLs |
| 148 |
INTEGER myOLn |
| 149 |
INTEGER myNz |
| 150 |
INTEGER exchWidthX |
| 151 |
INTEGER exchWidthY |
| 152 |
INTEGER simulationMode |
| 153 |
INTEGER cornerMode |
| 154 |
INTEGER myThid |
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_RL array(1-myOLw:sNx+myOLe, |
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& 1-myOLs:sNy+myOLn, |
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& myNZ, nSx, nSy) |
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CEndOfInterface |
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|
| 160 |
C == Local variables == |
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C theSimulationMode - Holds working copy of simulation mode |
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C theCornerMode - Holds working copy of corner mode |
| 163 |
INTEGER theSimulationMode |
| 164 |
INTEGER theCornerMode |
| 165 |
INTEGER I,J,K,bi,bj |
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|
| 167 |
theSimulationMode = simulationMode |
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theCornerMode = cornerMode |
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|
| 170 |
C-- Error checks |
| 171 |
IF ( exchWidthX .GT. myOLw ) |
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& STOP ' S/R EXCH_RL: exchWidthX .GT. myOLw' |
| 173 |
IF ( exchWidthX .GT. myOLe ) |
| 174 |
& STOP ' S/R EXCH_RL: exchWidthX .GT. myOLe' |
| 175 |
IF ( exchWidthY .GT. myOLs ) |
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& STOP ' S/R EXCH_RL: exchWidthY .GT. myOLs' |
| 177 |
IF ( exchWidthY .GT. myOLn ) |
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& STOP ' S/R EXCH_RL: exchWidthY .GT. myOLn' |
| 179 |
IF ( myOLw .GT. MAX_OLX_EXCH ) |
| 180 |
& STOP ' S/R EXCH_RL: myOLw .GT. MAX_OLX_EXCH' |
| 181 |
IF ( myOLe .GT. MAX_OLX_EXCH ) |
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& STOP ' S/R EXCH_RL: myOLe .GT. MAX_OLX_EXCH' |
| 183 |
IF ( myOLn .GT. MAX_OLX_EXCH ) |
| 184 |
& STOP ' S/R EXCH_RL: myOLn .GT. MAX_OLY_EXCH' |
| 185 |
IF ( myOLs .GT. MAX_OLY_EXCH ) |
| 186 |
& STOP ' S/R EXCH_RL: myOLs .GT. MAX_OLY_EXCH' |
| 187 |
IF ( myNZ .GT. MAX_NR_EXCH ) |
| 188 |
& STOP ' S/R EXCH_RL: myNZ .GT. MAX_NR_EXCH ' |
| 189 |
IF ( theSimulationMode .NE. FORWARD_SIMULATION |
| 190 |
& .AND. theSimulationMode .NE. REVERSE_SIMULATION |
| 191 |
& ) STOP ' S/R EXCH_RL: Unrecognised simulationMode ' |
| 192 |
IF ( theCornerMode .NE. EXCH_IGNORE_CORNERS |
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& .AND. theCornerMode .NE. EXCH_UPDATE_CORNERS |
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& ) STOP ' S/R EXCH_RL: Unrecognised cornerMode ' |
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|
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C-- Cycle edge buffer level |
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CALL EXCH_CYCLE_EBL( myThid ) |
| 198 |
|
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C-- "Put" east and west edges. |
| 200 |
CALL EXCH_RL_SEND_PUT_X( array, |
| 201 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 202 |
I exchWidthX, exchWidthY, |
| 203 |
I theSimulationMode, theCornerMode, myThid ) |
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|
| 205 |
C-- If corners are important then sync and update east and west edges |
| 206 |
C-- before doing north and south exchanges. |
| 207 |
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN |
| 208 |
CALL EXCH_RL_RECV_GET_X( array, |
| 209 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 210 |
I exchWidthX, exchWidthY, |
| 211 |
I theSimulationMode, theCornerMode, myThid ) |
| 212 |
ENDIF |
| 213 |
|
| 214 |
C "Put" north and south edges. |
| 215 |
CALL EXCH_RL_SEND_PUT_Y( array, |
| 216 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 217 |
I exchWidthX, exchWidthY, |
| 218 |
I theSimulationMode, theCornerMode, myThid ) |
| 219 |
|
| 220 |
|
| 221 |
C-- Sync and update north, south (and east, west if corner updating |
| 222 |
C-- not active). |
| 223 |
IF ( theCornerMode .NE. EXCH_UPDATE_CORNERS ) THEN |
| 224 |
CALL EXCH_RL_RECV_GET_X( array, |
| 225 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 226 |
I exchWidthX, exchWidthY, |
| 227 |
I theSimulationMode, theCornerMode, myThid ) |
| 228 |
ENDIF |
| 229 |
CALL EXCH_RL_RECV_GET_Y( array, |
| 230 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 231 |
I exchWidthX, exchWidthY, |
| 232 |
I theSimulationMode, theCornerMode, myThid ) |
| 233 |
C Special case for zonal average model i.e. case where sNx == 1 |
| 234 |
C In this case a forward mode exchange simply sets array to |
| 235 |
C the i=1 value for all i. |
| 236 |
IF ( sNx .EQ. 1 ) THEN |
| 237 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 238 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 239 |
DO K = 1,myNz |
| 240 |
DO J = 1-myOLs,sNy+myOLn |
| 241 |
DO I = 1-myOLw,sNx+myOLe |
| 242 |
array(I,J,K,bi,bj) = array(sNx,J,K,bi,bj) |
| 243 |
ENDDO |
| 244 |
ENDDO |
| 245 |
ENDDO |
| 246 |
ENDDO |
| 247 |
ENDDO |
| 248 |
ENDIF |
| 249 |
|
| 250 |
RETURN |
| 251 |
END |
| 252 |
|
| 253 |
CStartOfInterface |
| 254 |
SUBROUTINE EXCH_RS( |
| 255 |
U array, |
| 256 |
I myOLw, myOLe, myOLn, myOLs, myNz, |
| 257 |
I exchWidthX, exchWidthY, |
| 258 |
I simulationMode, cornerMode, myThid ) |
| 259 |
C /==========================================================\ |
| 260 |
C | SUBROUTINE EXCH_RS | |
| 261 |
C | o Control edge exchanges for RS array. | |
| 262 |
C |==========================================================| |
| 263 |
C | | |
| 264 |
C | Controlling routine for exchange of XY edges of an array | |
| 265 |
C | distributed in X and Y. The routine interfaces to | |
| 266 |
C | communication routines that can use messages passing | |
| 267 |
C | exchanges, put type exchanges or get type exchanges. | |
| 268 |
C | This allows anything from MPI to raw memory channel to | |
| 269 |
C | memmap segments to be used as a inter-process and/or | |
| 270 |
C | inter-thread communiation and synchronisation | |
| 271 |
C | mechanism. | |
| 272 |
C | Notes -- | |
| 273 |
C | 1. Some low-level mechanisms such as raw memory-channel | |
| 274 |
C | or SGI/CRAY shmem put do not have direct Fortran bindings| |
| 275 |
C | and are invoked through C stub routines. | |
| 276 |
C | 2. Although this routine is fairly general but it does | |
| 277 |
C | require nSx and nSy are the same for all innvocations. | |
| 278 |
C | There are many common data structures ( myByLo, | |
| 279 |
C | westCommunicationMode, mpiIdW etc... ) tied in with | |
| 280 |
C | (nSx,nSy). To support arbitray nSx and nSy would require | |
| 281 |
C | general forms of these. | |
| 282 |
C | | |
| 283 |
C \==========================================================/ |
| 284 |
IMPLICIT NONE |
| 285 |
|
| 286 |
C == Global data == |
| 287 |
#include "SIZE.h" |
| 288 |
#include "EEPARAMS.h" |
| 289 |
#include "EESUPPORT.h" |
| 290 |
#include "EXCH.h" |
| 291 |
|
| 292 |
C == Routine arguments == |
| 293 |
C array - Array with edges to exchange. |
| 294 |
C myOLw - West, East, North and South overlap region sizes. |
| 295 |
C myOLe |
| 296 |
C myOLn |
| 297 |
C myOLs |
| 298 |
C exchWidthX - Width of data region exchanged in X. |
| 299 |
C exchWidthY - Width of data region exchanged in Y. |
| 300 |
C Note -- |
| 301 |
C 1. In theory one could have a send width and |
| 302 |
C a receive width for each face of each tile. The only |
| 303 |
C restriction woul be that the send width of one |
| 304 |
C face should equal the receive width of the sent to |
| 305 |
C tile face. Dont know if this would be useful. I |
| 306 |
C have left it out for now as it requires additional |
| 307 |
C bookeeping. |
| 308 |
C simulationMode - Forward or reverse mode exchange ( provides |
| 309 |
C support for adjoint integration of code. ) |
| 310 |
C cornerMode - Flag indicating whether corner updates are |
| 311 |
C needed. |
| 312 |
C myThid - Thread number of this instance of S/R EXCH... |
| 313 |
INTEGER myOLw |
| 314 |
INTEGER myOLe |
| 315 |
INTEGER myOLs |
| 316 |
INTEGER myOLn |
| 317 |
INTEGER myNz |
| 318 |
INTEGER exchWidthX |
| 319 |
INTEGER exchWidthY |
| 320 |
INTEGER simulationMode |
| 321 |
INTEGER cornerMode |
| 322 |
INTEGER myThid |
| 323 |
_RS array(1-myOLw:sNx+myOLe, |
| 324 |
& 1-myOLs:sNy+myOLn, |
| 325 |
& myNZ, nSx, nSy) |
| 326 |
CEndOfInterface |
| 327 |
|
| 328 |
C == Local variables == |
| 329 |
C theSimulationMode - Holds working copy of simulation mode |
| 330 |
C theCornerMode - Holds working copy of corner mode |
| 331 |
INTEGER theSimulationMode |
| 332 |
INTEGER theCornerMode |
| 333 |
INTEGER I,J,K,bi,bj |
| 334 |
|
| 335 |
theSimulationMode = simulationMode |
| 336 |
theCornerMode = cornerMode |
| 337 |
|
| 338 |
C-- Error checks |
| 339 |
IF ( exchWidthX .GT. myOLw ) |
| 340 |
& STOP ' S/R EXCH_RS: exchWidthX .GT. myOLw' |
| 341 |
IF ( exchWidthX .GT. myOLe ) |
| 342 |
& STOP ' S/R EXCH_RS: exchWidthX .GT. myOLe' |
| 343 |
IF ( exchWidthY .GT. myOLs ) |
| 344 |
& STOP ' S/R EXCH_RS: exchWidthY .GT. myOLs' |
| 345 |
IF ( exchWidthY .GT. myOLn ) |
| 346 |
& STOP ' S/R EXCH_RS: exchWidthY .GT. myOLn' |
| 347 |
IF ( myOLw .GT. MAX_OLX_EXCH ) |
| 348 |
& STOP ' S/R EXCH_RS: myOLw .GT. MAX_OLX_EXCH' |
| 349 |
IF ( myOLe .GT. MAX_OLX_EXCH ) |
| 350 |
& STOP ' S/R EXCH_RS: myOLe .GT. MAX_OLX_EXCH' |
| 351 |
IF ( myOLn .GT. MAX_OLX_EXCH ) |
| 352 |
& STOP ' S/R EXCH_RS: myOLn .GT. MAX_OLY_EXCH' |
| 353 |
IF ( myOLs .GT. MAX_OLY_EXCH ) |
| 354 |
& STOP ' S/R EXCH_RS: myOLs .GT. MAX_OLY_EXCH' |
| 355 |
IF ( myNZ .GT. MAX_NR_EXCH ) |
| 356 |
& STOP ' S/R EXCH_RS: myNZ .GT. MAX_NR_EXCH ' |
| 357 |
IF ( theSimulationMode .NE. FORWARD_SIMULATION |
| 358 |
& .AND. theSimulationMode .NE. REVERSE_SIMULATION |
| 359 |
& ) STOP ' S/R EXCH_RS: Unrecognised simulationMode ' |
| 360 |
IF ( theCornerMode .NE. EXCH_IGNORE_CORNERS |
| 361 |
& .AND. theCornerMode .NE. EXCH_UPDATE_CORNERS |
| 362 |
& ) STOP ' S/R EXCH_RS: Unrecognised cornerMode ' |
| 363 |
|
| 364 |
C-- Cycle edge buffer level |
| 365 |
CALL EXCH_CYCLE_EBL( myThid ) |
| 366 |
|
| 367 |
IF ( theSimulationMode .EQ. FORWARD_SIMULATION ) THEN |
| 368 |
C-- "Put" east and west edges. |
| 369 |
CALL EXCH_RS_SEND_PUT_X( array, |
| 370 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 371 |
I exchWidthX, exchWidthY, |
| 372 |
I theSimulationMode, theCornerMode, myThid ) |
| 373 |
C-- If corners are important then sync and update east and west edges |
| 374 |
C-- before doing north and south exchanges. |
| 375 |
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN |
| 376 |
CALL EXCH_RS_RECV_GET_X( array, |
| 377 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 378 |
I exchWidthX, exchWidthY, |
| 379 |
I theSimulationMode, theCornerMode, myThid ) |
| 380 |
ENDIF |
| 381 |
C "Put" north and south edges. |
| 382 |
CALL EXCH_RS_SEND_PUT_Y( array, |
| 383 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 384 |
I exchWidthX, exchWidthY, |
| 385 |
I theSimulationMode, theCornerMode, myThid ) |
| 386 |
C-- Sync and update north, south (and east, west if corner updating |
| 387 |
C-- not active). |
| 388 |
IF ( theCornerMode .NE. EXCH_UPDATE_CORNERS ) THEN |
| 389 |
CALL EXCH_RS_RECV_GET_X( array, |
| 390 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 391 |
I exchWidthX, exchWidthY, |
| 392 |
I theSimulationMode, theCornerMode, myThid ) |
| 393 |
ENDIF |
| 394 |
CALL EXCH_RS_RECV_GET_Y( array, |
| 395 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 396 |
I exchWidthX, exchWidthY, |
| 397 |
I theSimulationMode, theCornerMode, myThid ) |
| 398 |
ENDIF |
| 399 |
|
| 400 |
IF ( theSimulationMode .EQ. REVERSE_SIMULATION ) THEN |
| 401 |
C "Put" north and south edges. |
| 402 |
CALL EXCH_RS_SEND_PUT_Y( array, |
| 403 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 404 |
I exchWidthX, exchWidthY, |
| 405 |
I theSimulationMode, theCornerMode, myThid ) |
| 406 |
C-- If corners are important then sync and update east and west edges |
| 407 |
C-- before doing north and south exchanges. |
| 408 |
IF ( theCornerMode .EQ. EXCH_UPDATE_CORNERS ) THEN |
| 409 |
CALL EXCH_RS_RECV_GET_Y( array, |
| 410 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 411 |
I exchWidthX, exchWidthY, |
| 412 |
I theSimulationMode, theCornerMode, myThid ) |
| 413 |
ENDIF |
| 414 |
C-- "Put" east and west edges. |
| 415 |
CALL EXCH_RS_SEND_PUT_X( array, |
| 416 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 417 |
I exchWidthX, exchWidthY, |
| 418 |
I theSimulationMode, theCornerMode, myThid ) |
| 419 |
C-- Sync and update east, west (and north, south if corner updating |
| 420 |
C-- not active). |
| 421 |
IF ( theCornerMode .NE. EXCH_UPDATE_CORNERS ) THEN |
| 422 |
CALL EXCH_RS_RECV_GET_Y( array, |
| 423 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 424 |
I exchWidthX, exchWidthY, |
| 425 |
I theSimulationMode, theCornerMode, myThid ) |
| 426 |
ENDIF |
| 427 |
CALL EXCH_RS_RECV_GET_X( array, |
| 428 |
I myOLw, myOLe, myOLs, myOLn, myNz, |
| 429 |
I exchWidthX, exchWidthY, |
| 430 |
I theSimulationMode, theCornerMode, myThid ) |
| 431 |
ENDIF |
| 432 |
C Special case for zonal average model i.e. case where sNx == 1 |
| 433 |
C In this case a forward mode exchange simply sets array to |
| 434 |
C the i=1 value for all i. |
| 435 |
IF ( sNx .EQ. 1 ) THEN |
| 436 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 437 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 438 |
DO K = 1,myNz |
| 439 |
DO J = 1-myOLs,sNy+myOLn |
| 440 |
DO I = 1-myOLw,sNx+myOLe |
| 441 |
array(I,J,K,bi,bj) = array(sNx,J,K,bi,bj) |
| 442 |
ENDDO |
| 443 |
ENDDO |
| 444 |
ENDDO |
| 445 |
ENDDO |
| 446 |
ENDDO |
| 447 |
ENDIF |
| 448 |
|
| 449 |
RETURN |
| 450 |
END |
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