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jmc |
1.10 |
C $Header: /u/gcmpack/MITgcm_contrib/nesting_sannino/code_nest_merged/ini_communication_patterns.F,v 1.2 2009/10/23 22:02:18 sannino Exp $ |
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adcroft |
1.4 |
C $Name: $ |
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cnh |
1.1 |
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jmc |
1.10 |
#include "PACKAGES_CONFIG.h" |
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cnh |
1.1 |
#include "CPP_EEOPTIONS.h" |
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cnh |
1.6 |
CBOP |
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C !ROUTINE: INI_COMMUNICATION_PATTERNS |
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C !INTERFACE: |
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cnh |
1.1 |
SUBROUTINE INI_COMMUNICATION_PATTERNS( myThid ) |
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IMPLICIT NONE |
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cnh |
1.6 |
C !DESCRIPTION: |
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C *==========================================================* |
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jmc |
1.10 |
C | SUBROUTINE INI\_COMMUNICATION\_PATTERNS |
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C | o Initialise between tile communication data structures. |
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cnh |
1.6 |
C *==========================================================* |
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jmc |
1.10 |
C | This routine assigns identifiers to each tile and then |
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C | defines a map of neighbors for each tile. |
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C | For each neighbor a communication method is defined. |
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cnh |
1.6 |
C *==========================================================* |
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cnh |
1.1 |
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cnh |
1.6 |
C !USES: |
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cnh |
1.1 |
C === Global data === |
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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 "EXCH.h" |
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cnh |
1.6 |
C !INPUT/OUTPUT PARAMETERS: |
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cnh |
1.1 |
C === Routine arguments === |
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cnh |
1.6 |
C myThid :: Thread number we are dealing with in this call |
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cnh |
1.1 |
INTEGER myThid |
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cnh |
1.6 |
C !LOCAL VARIABLES: |
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cnh |
1.1 |
C === Local variables === |
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cnh |
1.6 |
C pxW :: Process X coord of process to west. |
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C pxE :: Process X coord of process to west. |
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C pyN :: Process Y coord of process to north. |
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C pyS :: Process Y coord of process to south. |
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C procW :: Process Id of process to west. |
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C procE :: Process Id of process to east. |
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C procN :: Process Id of process to north. |
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C procS :: Process Id of process to south. |
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C totalTileCount :: Total number of tiles |
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jmc |
1.10 |
C tagW0, tagE0, tagS0, tagN0, theTag :: Working variables for |
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cnh |
1.6 |
C calculating message tags. |
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C biW, biE, bjN, bjS :: Tile x and y indices to west, east, |
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C south and north. |
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C bi, bj :: Tile loop counter |
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heimbach |
1.8 |
C picnt, pjcnt :: Process loop counter |
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cnh |
1.6 |
C bi0, bj0 :: Base global index coordinate ( on CS there is no global |
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C coord). |
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cnh |
1.1 |
INTEGER bi0(nPx) |
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INTEGER bj0(nPy) |
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heimbach |
1.9 |
INTEGER bi, bj, picnt, pjcnt |
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cnh |
1.1 |
INTEGER pxW, pxE, pyN, pyS |
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INTEGER procW, procE, procN, procS |
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INTEGER totalTileCount |
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INTEGER tagW0, tagE0, tagS0, tagN0, theTag |
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INTEGER biE, biW, bjN, bjS |
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INTEGER thePx, thePy, theBj, theBi |
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cnh |
1.6 |
CEOP |
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cnh |
1.1 |
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adcroft |
1.5 |
#ifndef ALWAYS_USE_MPI |
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C-- Turn off memsync by default (e.g. needed for threads on SUNs) |
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adcroft |
1.4 |
exchNeedsMemsync = .TRUE. |
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exchUsesBarrier = .TRUE. |
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adcroft |
1.5 |
#else |
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C-- ... except that MPI needs this until some counter problem is fixed. |
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exchNeedsMemsync = .FALSE. |
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exchUsesBarrier = .FALSE. |
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#endif |
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cnh |
1.1 |
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C-- Define a globally unique tile numbers for each tile. |
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C-- We aslo define the tile numbers for our east, west, south |
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C-- and north neighbor tiles here. As coded below this is done from |
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C-- a simple cartesian formula. To handle irregular tile distributions |
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jmc |
1.10 |
C-- the code below would be changed. For instance we could read |
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cnh |
1.1 |
C-- the neighbor tile information from a file rather than deriving |
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C-- it in-line. This allows general tile distributions and connectivity |
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C-- both within a thread, between threads and between processors. |
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C Notes -- |
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C 1. The cartesian based formula coded below works as follows: |
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C i. Each tile has one west neighbor, one east neighbor |
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C one north neignbor and one south neighbor. |
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C ii. For each of my neighbors store the following |
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C - neighbor tile id |
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jmc |
1.10 |
C - neighbor process id |
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cnh |
1.1 |
C 2. The information that is stored is then used to determine |
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C the between tile communication method. The method used |
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C depends on whether the tile is part of the same process, |
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C on the same machine etc... |
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C 3. To initialise a tile distribution with holes in it |
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C i.e. tiles that are not computed on. Set tile number to |
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C the value NULL_TILE. This must also be done for tileNoW, |
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C tileNoE, tileNoS, tileNoN. |
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C 4. The default formula below assigns tile numbers sequentially |
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C in X on the **global** grid. Within a process the tile numbers |
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jmc |
1.10 |
C will not necessairily be sequential. This means that the tile |
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cnh |
1.1 |
C numbering label does not change when nTx, nTy, nPx or nPy change. |
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C It will only change if the tile size changes or the global |
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C grid changes. |
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C bi0 and bj0 are the base global tile grid coordinate for the first |
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C tile in this process. |
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heimbach |
1.8 |
DO picnt = 1, nPx |
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bi0(picnt) = picnt |
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cnh |
1.1 |
ENDDO |
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heimbach |
1.8 |
DO pjcnt = 1, nPy |
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bj0(pjcnt) = pjcnt |
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cnh |
1.1 |
ENDDO |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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C o My tile identifier |
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adcroft |
1.2 |
Crg tileNo(bi,bj) = (bj0(myPy)-1+bj-1)*nSx*nPx+bi0(myPx)+bi-1 |
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cnh |
1.1 |
thePx = myPx |
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thePy = myPy |
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theBj = bj |
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theBi = bi |
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tileNo(bi,bj) = |
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jmc |
1.10 |
& ((thePy-1)*nSy+theBj-1)*nSx*nPx |
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cnh |
1.1 |
& + (thePx-1)*nSx |
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& + theBi |
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C o My west neighbor tile and process identifier |
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biW = bi-1 |
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pxW = myPx |
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procW = myPid |
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IF ( biW .LT. 1 ) THEN |
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biW = nSx |
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pxW = myPx-1 |
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procW = pidW |
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IF ( pxW .LT. 1 ) pxW = nPx |
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ENDIF |
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adcroft |
1.2 |
Crg tileNoW (bi,bj) = (bj0(myPy)-1+bj-1)*nSx*nPx+bi0(pxW)+biW-1 |
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cnh |
1.1 |
thePx = pxW |
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thePy = myPy |
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theBj = bj |
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theBi = biW |
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jmc |
1.10 |
tileNoW (bi,bj) = |
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cnh |
1.1 |
& ((thePy-1)*nSy+theBj-1)*nSx*nPx |
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& + (thePx-1)*nSx |
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& + theBi |
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jmc |
1.10 |
#ifdef ALLOW_NEST_CHILD |
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#ifndef ALLOW_USE_MPI |
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tileNoW (bi,bj) = NULL_TILE |
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#endif |
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#endif |
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cnh |
1.1 |
tilePidW(bi,bj) = procW |
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tileBiW (bi,bj) = biW |
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jmc |
1.10 |
tileBjW (bi,bj) = bj |
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cnh |
1.1 |
C o My east neighbor tile and process identifier |
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biE = bi+1 |
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pxE = myPx |
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procE = myPid |
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IF ( biE .GT. nSx ) THEN |
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biE = 1 |
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pxE = myPx+1 |
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procE = pidE |
| 160 |
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IF ( pxE .GT. nPx ) pxE = 1 |
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ENDIF |
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adcroft |
1.2 |
Crg tileNoE(bi,bj) = (bj0(myPy)-1+bj-1)*nSx*nPx+bi0(pxE)+biE-1 |
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cnh |
1.1 |
thePx = pxE |
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thePy = myPy |
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theBi = biE |
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theBj = bj |
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jmc |
1.10 |
tileNoE(bi,bj) = |
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cnh |
1.1 |
& ((thePy-1)*nSy+theBj-1)*nSx*nPx |
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& + (thePx-1)*nSx |
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& + theBi |
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jmc |
1.10 |
#ifdef ALLOW_NEST_CHILD |
| 172 |
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#ifndef ALLOW_USE_MPI |
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tileNoE (bi,bj) = NULL_TILE |
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#endif |
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#endif |
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cnh |
1.1 |
tilePidE(bi,bj) = procE |
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tileBiE (bi,bj) = biE |
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jmc |
1.10 |
tileBjE (bi,bj) = bj |
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cnh |
1.1 |
C o My north neighbor tile and process identifier |
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bjN = bj+1 |
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pyN = myPy |
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procN = myPid |
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IF ( bjN .GT. nSy ) THEN |
| 184 |
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bjN = 1 |
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pyN = myPy+1 |
| 186 |
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procN = pidN |
| 187 |
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IF ( pyN .GT. nPy ) pyN = 1 |
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ENDIF |
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adcroft |
1.2 |
Crg tileNoN(bi,bj) = (bj0(pyN)-1+bjN-1)*nSx*nPx+bi0(myPx)+bi-1 |
| 190 |
cnh |
1.1 |
thePx = myPx |
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jmc |
1.10 |
thePy = pyN |
| 192 |
cnh |
1.1 |
theBi = bi |
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theBj = bjN |
| 194 |
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tileNoN(bi,bj) = |
| 195 |
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& ((thePy-1)*nSy+theBj-1)*nSx*nPx |
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& + (thePx-1)*nSx |
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& + theBi |
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tilePidN(bi,bj) = procN |
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tileBiN(bi,bj) = bi |
| 200 |
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tileBjN(bi,bj) = bjN |
| 201 |
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C o My south neighbor tile and process identifier |
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bjS = bj-1 |
| 203 |
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pyS = myPy |
| 204 |
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procS = myPid |
| 205 |
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IF ( bjS .LT. 1 ) THEN |
| 206 |
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bjS = nSy |
| 207 |
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pyS = pyS-1 |
| 208 |
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procS = pidS |
| 209 |
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IF ( pyS .LT. 1 ) pyS = nPy |
| 210 |
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ENDIF |
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adcroft |
1.2 |
Crg tileNoS(bi,bj) = (bj0(pyS+1)-1+bjS-1)*nSx*nPx+bi0(myPx+1)+bi-1 |
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cnh |
1.1 |
thePx = myPx |
| 213 |
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thePy = pyS |
| 214 |
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theBi = bi |
| 215 |
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theBj = bjS |
| 216 |
jmc |
1.10 |
tileNoS(bi,bj) = |
| 217 |
cnh |
1.1 |
& ((thePy-1)*nSy+theBj-1)*nSx*nPx |
| 218 |
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& + (thePx-1)*nSx |
| 219 |
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& + theBi |
| 220 |
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tilePidS(bi,bj) = procS |
| 221 |
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tileBiS(bi,bj) = bi |
| 222 |
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tileBjS(bi,bj) = bjS |
| 223 |
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ENDDO |
| 224 |
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ENDDO |
| 225 |
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| 226 |
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C-- Define the total count of tiles. |
| 227 |
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totalTileCount = nSx*nSy*nPx*nPy |
| 228 |
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| 229 |
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C-- Set tags for each tile face. |
| 230 |
jmc |
1.10 |
C Tags are used to distinguish exchanges from particular |
| 231 |
cnh |
1.1 |
C faces of particular tiles. |
| 232 |
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C Tag numbers are based on |
| 233 |
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C i - The tile number |
| 234 |
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C ii - The direction (N,S,W,E) of the message |
| 235 |
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C We dont check for the NULL_TILE tile number here as it |
| 236 |
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C should not actually be used. |
| 237 |
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TagW0=1 |
| 238 |
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TagE0=2 |
| 239 |
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TagN0=3 |
| 240 |
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TagS0=4 |
| 241 |
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DO bj=myByLo(myThid),myByHi(myThid) |
| 242 |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 243 |
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C Send tags |
| 244 |
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C o Tag I use for messages I send to west |
| 245 |
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theTag = TagW0*totalTileCount+tileNo(bi,bj)-1 |
| 246 |
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tileTagSendW(bi,bj) = theTag |
| 247 |
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C o Tag I use for messages I send to east |
| 248 |
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theTag = TagE0*totalTileCount+tileNo(bi,bj)-1 |
| 249 |
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tileTagSendE(bi,bj) = theTag |
| 250 |
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C o Tag I use for messages I send to north |
| 251 |
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theTag = TagN0*totalTileCount+tileNo(bi,bj)-1 |
| 252 |
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tileTagSendN(bi,bj) = theTag |
| 253 |
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C o Tag I use for messages I send to south |
| 254 |
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theTag = TagS0*totalTileCount+tileNo(bi,bj)-1 |
| 255 |
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tileTagSendS(bi,bj) = theTag |
| 256 |
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C Receive tags |
| 257 |
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C o Tag on messages I receive from my east |
| 258 |
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theTag = TagW0*totalTileCount+tileNoE(bi,bj)-1 |
| 259 |
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tileTagRecvE(bi,bj) = theTag |
| 260 |
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C o Tag on messages I receive from my west |
| 261 |
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theTag = TagE0*totalTileCount+tileNoW(bi,bj)-1 |
| 262 |
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tileTagRecvW(bi,bj) = theTag |
| 263 |
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C o Tag on messages I receive from my north |
| 264 |
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theTag = TagS0*totalTileCount+tileNoN(bi,bj)-1 |
| 265 |
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tileTagRecvN(bi,bj) = theTag |
| 266 |
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C o Tag on messages I receive from my north |
| 267 |
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theTag = TagN0*totalTileCount+tileNoS(bi,bj)-1 |
| 268 |
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tileTagRecvS(bi,bj) = theTag |
| 269 |
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ENDDO |
| 270 |
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ENDDO |
| 271 |
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| 272 |
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C-- Set the form of excahnge to use between neighboring |
| 273 |
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C -- tiles. |
| 274 |
jmc |
1.10 |
C For now use either shared memory, messages or nothing. Further |
| 275 |
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C rules can be added later to allow shm regions and ump regions |
| 276 |
cnh |
1.1 |
C etc... |
| 277 |
jmc |
1.10 |
C Notes - |
| 278 |
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C 1. We require symmetry here. If one face of a tile uses |
| 279 |
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C communication method A then the matching face on its neighbor |
| 280 |
cnh |
1.1 |
C tile must also use communication method A. |
| 281 |
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DO bj=myByLo(myThid),myByHi(myThid) |
| 282 |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 283 |
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C o West face communication |
| 284 |
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IF ( tileNoW(bi,bj) .EQ. NULL_TILE ) THEN |
| 285 |
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tileCommModeW(bi,bj) = COMM_NONE |
| 286 |
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ELSE |
| 287 |
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IF ( myPid .EQ. tilePidW(bi,bj) ) THEN |
| 288 |
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tileCommModeW(bi,bj) = COMM_PUT |
| 289 |
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ELSE |
| 290 |
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tileCommModeW(bi,bj) = COMM_MSG |
| 291 |
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ENDIF |
| 292 |
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ENDIF |
| 293 |
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C o East face communication |
| 294 |
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IF ( tileNoE(bi,bj) .EQ. NULL_TILE ) THEN |
| 295 |
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tileCommModeE(bi,bj) = COMM_NONE |
| 296 |
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ELSE |
| 297 |
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IF ( myPid .EQ. tilePidE(bi,bj) ) THEN |
| 298 |
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tileCommModeE(bi,bj) = COMM_PUT |
| 299 |
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ELSE |
| 300 |
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tileCommModeE(bi,bj) = COMM_MSG |
| 301 |
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ENDIF |
| 302 |
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ENDIF |
| 303 |
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C o South face communication |
| 304 |
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IF ( tileNoS(bi,bj) .EQ. NULL_TILE ) THEN |
| 305 |
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tileCommModeS(bi,bj) = COMM_NONE |
| 306 |
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ELSE |
| 307 |
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IF ( myPid .EQ. tilePidS(bi,bj) ) THEN |
| 308 |
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tileCommModeS(bi,bj) = COMM_PUT |
| 309 |
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ELSE |
| 310 |
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tileCommModeS(bi,bj) = COMM_MSG |
| 311 |
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ENDIF |
| 312 |
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ENDIF |
| 313 |
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C o North face communication |
| 314 |
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IF ( tileNoN(bi,bj) .EQ. NULL_TILE ) THEN |
| 315 |
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tileCommModeN(bi,bj) = COMM_NONE |
| 316 |
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ELSE |
| 317 |
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IF ( myPid .EQ. tilePidN(bi,bj) ) THEN |
| 318 |
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tileCommModeN(bi,bj) = COMM_PUT |
| 319 |
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ELSE |
| 320 |
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tileCommModeN(bi,bj) = COMM_MSG |
| 321 |
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ENDIF |
| 322 |
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ENDIF |
| 323 |
jmc |
1.10 |
|
| 324 |
cnh |
1.1 |
ENDDO |
| 325 |
|
|
ENDDO |
| 326 |
|
|
|
| 327 |
|
|
C Initialise outstanding exchange request counter |
| 328 |
|
|
DO bj=myByLo(myThid),myByHi(myThid) |
| 329 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 330 |
|
|
exchNReqsX(1,bi,bj) = 0 |
| 331 |
|
|
exchNReqsY(1,bi,bj) = 0 |
| 332 |
|
|
ENDDO |
| 333 |
|
|
ENDDO |
| 334 |
|
|
|
| 335 |
|
|
RETURN |
| 336 |
|
|
END |
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