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jmc |
1.14 |
C $Header: /u/gcmpack/MITgcm/eesupp/src/ini_threading_environment.F,v 1.13 2010/05/17 20:40:43 jmc Exp $ |
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cnh |
1.8 |
C $Name: $ |
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cnh |
1.1 |
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#include "CPP_EEOPTIONS.h" |
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jmc |
1.11 |
#include "PACKAGES_CONFIG.h" |
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cnh |
1.1 |
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cnh |
1.8 |
CBOP |
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C !ROUTINE: INI_THREADING_ENVIRONMENT |
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C !INTERFACE: |
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cnh |
1.1 |
SUBROUTINE INI_THREADING_ENVIRONMENT |
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cnh |
1.8 |
C !DESCRIPTION: |
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C *==========================================================* |
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jmc |
1.12 |
C | SUBROUTINE INI\_THREADING\_ENVIRONMENT |
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C | o Initialise multi-threaded environment. |
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cnh |
1.8 |
C *==========================================================* |
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jmc |
1.12 |
C | Generally we do not start separate threads here. |
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C | The separate threads a spawned at later on. |
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C | Here we perform initialisation of data-structures |
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C | that indicate which of the nSx x nSy tiles a thread is |
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C | responsible for. |
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C | The multiple threads are spawned in the top level MAIN |
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C | routine. |
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cnh |
1.8 |
C *==========================================================* |
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C !USES: |
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jmc |
1.14 |
IMPLICIT NONE |
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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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cnh |
1.8 |
C !LOCAL VARIABLES: |
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cnh |
1.1 |
C == Local variables == |
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C bXPerThread - Blocks of size sNx per thread. |
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C byPerThread - Blocks of size sNy per thread. |
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jmc |
1.13 |
C thId - Thread index. Temporary used in loops |
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jmc |
1.12 |
C which set per. thread values on a |
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cnh |
1.1 |
C cartesian grid. |
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C bxLo, bxHi - Work vars. for thread index |
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C byLo, byHi range. bxLo is the lowest i index |
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C that a thread covers, bxHi is the |
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C highest i index. byLo is the lowest |
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C j index, byHi is the highest j index. |
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C I, J - Loop counter |
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C msgBuf - I/O buffer for reporting status information. |
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C myThid - Dummy thread id for use in printed messages |
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jmc |
1.12 |
C ( this routine "INI_THREADING_ENVIRONMENT" is |
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cnh |
1.5 |
C called before multi-threading has started.) |
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1.1 |
INTEGER bxPerThread |
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INTEGER byPerThread |
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jmc |
1.13 |
INTEGER thId |
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cnh |
1.1 |
INTEGER bxLo, bxHi |
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INTEGER byLo, byHi |
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jmc |
1.13 |
INTEGER I, J |
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cnh |
1.1 |
CHARACTER*(MAX_LEN_MBUF) msgBuf |
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INTEGER myThid |
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jmc |
1.13 |
#ifndef ALLOW_EXCH2 |
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LOGICAL flag |
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#endif |
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cnh |
1.8 |
CEOP |
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cnh |
1.1 |
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C-- Set default for all threads of having no blocks to |
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C-- work on - except for thread 1. |
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myBxLo(1) = 1 |
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myBxHi(1) = nSx |
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myByLo(1) = 1 |
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myByHi(1) = nSy |
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DO I = 2, MAX_NO_THREADS |
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myBxLo(I) = 0 |
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cnh |
1.5 |
myBxHi(I) = 0 |
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cnh |
1.1 |
myByLo(I) = 0 |
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cnh |
1.5 |
myByHi(I) = 0 |
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1.1 |
ENDDO |
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myThid = 1 |
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1.5 |
commName(COMM_NONE) = 'none' |
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commName(COMM_MSG ) = 'messages' |
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commName(COMM_PUT ) = 'put' |
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commName(COMM_GET ) = 'get' |
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1.1 |
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C-- If there are multiple threads allocate different range of the |
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C-- nSx*nSy blocks to each thread. |
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C For now handle simple case of no. blocks nSx = n*nTx and |
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C no. blocks nSy = m*nTy ( where m and n are integer ). This |
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C is handled by simply mapping threads to blocks in sequence |
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jmc |
1.12 |
C with the x thread index moving fastest. |
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C Later code which sets the thread number of neighboring blocks |
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cnh |
1.5 |
C needs to be consistent with the code here. |
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1.1 |
nThreads = nTx * nTy |
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jmc |
1.12 |
IF ( nThreads .GT. MAX_NO_THREADS ) THEN |
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WRITE(msgBuf,'(2A,2I6)') |
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& 'S/R INI_THREADING_ENVIRONMENT:', |
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& ' Total number of threads exceeds MAX_NO_THREADS', |
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& nTx*nTy, MAX_NO_THREADS |
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CALL PRINT_ERROR(msgBuf, myThid) |
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WRITE(msgBuf,'(2A)') |
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& ' Needs to increase MAX_NO_THREADS', |
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& ' in file "EEPARAMS.h" and to re-compile' |
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CALL PRINT_ERROR(msgBuf, myThid) |
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eeBootError = .TRUE. |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
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ENDIF |
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cnh |
1.1 |
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cnh |
1.5 |
C-- Initialise the barrier mechanisms |
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C BAR2 will eventually replace barrier everywhere. |
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cnh |
1.1 |
CALL BARRIER_INIT |
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cnh |
1.5 |
DO I=1, MAX_NO_THREADS |
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CALL BAR2_INIT(I) |
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ENDDO |
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C-- Initialise exchange mechanism |
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CALL EXCH_INIT |
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cnh |
1.1 |
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IF ( nThreads .NE. nTx*nTy ) THEN |
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jmc |
1.12 |
WRITE(msgBuf,'(A,A,A,I5,A,I5)') |
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cnh |
1.1 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
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& ' Total number of threads is not the same as nTx*nTy.', |
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& ' nTx * nTy = ',nTx*nTy,' nThreads = ',nThreads |
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CALL PRINT_ERROR(msgBuf, myThid) |
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eeBootError = .TRUE. |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
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ENDIF |
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bxPerThread = nSx/nTx |
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IF ( bxPerThread*nTx .NE. nSx ) THEN |
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jmc |
1.12 |
WRITE(msgBuf,'(A,A,A)') |
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cnh |
1.1 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
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cnh |
1.5 |
& ' Number of blocks in X (nSx)', |
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& ' must be exact multiple of threads in X (nTx).' |
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cnh |
1.1 |
CALL PRINT_ERROR(msgBuf, myThid) |
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eeBootError = .TRUE. |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
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ENDIF |
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byPerThread = nSy/nTy |
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IF ( byPerThread*nTy .NE. nSy ) THEN |
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jmc |
1.12 |
WRITE(msgBuf,'(A,A,A)') |
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cnh |
1.1 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
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cnh |
1.5 |
& ' Number of blocks in Y (nSy)', |
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& ' must be exact multiple of threads in Y (nTy).' |
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cnh |
1.1 |
CALL PRINT_ERROR(msgBuf, myThid) |
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eeBootError = .TRUE. |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
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ENDIF |
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IF ( .NOT. eeBootError ) THEN |
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byLo = 1 |
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DO J=1,nTy |
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byHi = byLo+byPerThread-1 |
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bxLo = 1 |
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DO I=1,nTx |
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jmc |
1.13 |
thId = (J-1)*nTx+I |
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cnh |
1.1 |
bxHi = bxLo+bxPerThread-1 |
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jmc |
1.13 |
myBxLo(thId) = bxLo |
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myBxHi(thId) = bxHi |
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myByLo(thId) = byLo |
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myByHi(thId) = byHi |
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cnh |
1.1 |
bxLo = bxHi+1 |
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ENDDO |
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byLo = byHi+1 |
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ENDDO |
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ENDIF |
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jmc |
1.13 |
DO thId=1,nThreads |
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CALL INI_COMMUNICATION_PATTERNS( thId ) |
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cnh |
1.1 |
ENDDO |
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C-- Print mapping of threads to grid points. |
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jmc |
1.12 |
WRITE(msgBuf,'(A)') |
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cnh |
1.5 |
&'// ======================================================' |
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cnh |
1.1 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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WRITE(msgBuf,'(A)') '// Mapping of tiles to threads' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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cnh |
1.5 |
C o Write list of tiles each thread is responsible for |
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jmc |
1.12 |
WRITE(msgBuf,'(A)') |
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cnh |
1.5 |
&'// ======================================================' |
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cnh |
1.1 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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DO I=1,nThreads |
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jmc |
1.12 |
WRITE(msgBuf,'(A,I4,A,4(I4,A1))') |
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cnh |
1.1 |
& '// -o- Thread',I,', tiles (', |
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& myBxLo(I),':',myBxHi(I),',',myByLo(I),':',myByHi(I),')' |
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cnh |
1.5 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,SQUEEZE_BOTH , 1) |
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cnh |
1.1 |
ENDDO |
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WRITE(msgBuf,'(A)') ' ' |
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cnh |
1.5 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,SQUEEZE_RIGHT , 1) |
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cnh |
1.1 |
|
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jmc |
1.11 |
#ifndef ALLOW_EXCH2 |
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cnh |
1.5 |
C o For each tile print its communication method(s) |
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jmc |
1.12 |
WRITE(msgBuf,'(A)') |
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cnh |
1.5 |
&'// ======================================================' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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WRITE(msgBuf,'(A)') '// Tile <-> Tile connectvity table' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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jmc |
1.12 |
WRITE(msgBuf,'(A)') |
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cnh |
1.5 |
&'// ======================================================' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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DO J=1,nSy |
| 202 |
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DO I=1,nSx |
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jmc |
1.12 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A)') |
| 204 |
cnh |
1.5 |
& '//',' Tile number: ',tileNo(I,J), |
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& ' (process no. = ',myPid,')' |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT , 1) |
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C o West communication details |
| 208 |
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IF ( tileNoW(I,J).NE. NULL_TILE ) THEN |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
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& '// WEST: ', |
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& 'Tile = ',tileNoW(I,J), |
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& ', Process = ',tilePidW(I,J), |
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& ', Comm = ',commName(tileCommModeW(I,J)) |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
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& '// ', |
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& ' bi = ',tileBiW(I,J), |
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& ', bj = ',tileBjW(I,J) |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 220 |
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ELSE |
| 221 |
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WRITE(msgBuf,'(A)') |
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& '// WEST: no neighbor' |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
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ENDIF |
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C o East communication details |
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IF ( tileNoE(I,J).NE. NULL_TILE ) THEN |
| 227 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
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& '// EAST: ', |
| 229 |
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& 'Tile = ',tileNoE(I,J), |
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& ', Process = ',tilePidE(I,J), |
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& ', Comm = ',commName(tileCommModeE(I,J)) |
| 232 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 233 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
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& '// ', |
| 235 |
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& ' bi = ',tileBiE(I,J), |
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& ', bj = ',tileBjE(I,J) |
| 237 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 238 |
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ELSE |
| 239 |
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WRITE(msgBuf,'(A)') |
| 240 |
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& '// EAST: no neighbor' |
| 241 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 242 |
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ENDIF |
| 243 |
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C o South communication method |
| 244 |
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IF ( tileNoS(I,J).NE. NULL_TILE ) THEN |
| 245 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
| 246 |
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& '// SOUTH: ', |
| 247 |
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& 'Tile = ',tileNoS(I,J), |
| 248 |
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& ', Process = ',tilePidS(I,J), |
| 249 |
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& ', Comm = ',commName(tileCommModeS(I,J)) |
| 250 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 251 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
| 252 |
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& '// ', |
| 253 |
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& ' bi = ',tileBiS(I,J), |
| 254 |
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& ', bj = ',tileBjS(I,J) |
| 255 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 256 |
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ELSE |
| 257 |
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WRITE(msgBuf,'(A)') |
| 258 |
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& '// SOUTH: no neighbor' |
| 259 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 260 |
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ENDIF |
| 261 |
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C o North communication method |
| 262 |
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IF ( tileNoN(I,J).NE. NULL_TILE ) THEN |
| 263 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
| 264 |
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& '// NORTH: ', |
| 265 |
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& 'Tile = ',tileNoN(I,J), |
| 266 |
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& ', Process = ',tilePidN(I,J), |
| 267 |
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& ', Comm = ',commName(tileCommModeN(I,J)) |
| 268 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 269 |
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WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
| 270 |
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& '// ', |
| 271 |
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& ' bi = ',tileBiN(I,J), |
| 272 |
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& ', bj = ',tileBjN(I,J) |
| 273 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 274 |
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ELSE |
| 275 |
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WRITE(msgBuf,'(A)') |
| 276 |
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& '// NORTH: no neighbor' |
| 277 |
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CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 278 |
cnh |
1.1 |
ENDIF |
| 279 |
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ENDDO |
| 280 |
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ENDDO |
| 281 |
cnh |
1.5 |
WRITE(msgBuf,'(A)') ' ' |
| 282 |
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CALL PRINT_MESSAGE( msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
| 283 |
jmc |
1.11 |
#endif /* ndef ALLOW_EXCH2 */ |
| 284 |
cnh |
1.1 |
|
| 285 |
jmc |
1.14 |
C-- Check EXCH-1 options |
| 286 |
jmc |
1.13 |
#ifndef ALLOW_EXCH2 |
| 287 |
jmc |
1.14 |
IF ( usingMPI .AND. useCubedSphereExchange ) THEN |
| 288 |
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C- not working with multi-procs (checked within EXCH1-CUBE S/R) and |
| 289 |
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C- if compiled with MPI (without EXCH2) safer to set usingMPI to False. |
| 290 |
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WRITE(msgBuf,'(2A)') 'EXCH-1 useCubedSphereExchange', |
| 291 |
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& ' unsafe with usingMPI=True' |
| 292 |
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CALL PRINT_ERROR( msgBuf, myThid ) |
| 293 |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
| 294 |
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ENDIF |
| 295 |
jmc |
1.13 |
IF ( nThreads.GT.1 .AND. useCubedSphereExchange ) THEN |
| 296 |
jmc |
1.14 |
C- multi-threads not working for local arrays; could remove the stop if |
| 297 |
jmc |
1.13 |
C we are sure that only shared array (=in common blocks) are exchanged. |
| 298 |
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WRITE(msgBuf,'(2A)') 'EXCH-1 useCubedSphereExchange', |
| 299 |
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& ' unsafe with multi-threads' |
| 300 |
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CALL PRINT_ERROR( msgBuf, myThid ) |
| 301 |
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STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
| 302 |
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ENDIF |
| 303 |
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IF ( nThreads.GT.1 ) THEN |
| 304 |
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flag = .FALSE. |
| 305 |
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DO J=1,nSy |
| 306 |
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DO I=1,nSx |
| 307 |
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flag = flag |
| 308 |
|
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& .OR. tileCommModeW(I,J).EQ.COMM_GET |
| 309 |
|
|
& .OR. tileCommModeE(I,J).EQ.COMM_GET |
| 310 |
|
|
& .OR. tileCommModeS(I,J).EQ.COMM_GET |
| 311 |
|
|
& .OR. tileCommModeN(I,J).EQ.COMM_GET |
| 312 |
|
|
ENDDO |
| 313 |
|
|
ENDDO |
| 314 |
|
|
IF ( flag ) THEN |
| 315 |
|
|
C- multi-threads not working for local arrays; not safe neither for shared arrays |
| 316 |
|
|
WRITE(msgBuf,'(3A)') 'EXCH-1 using Comm = ', |
| 317 |
|
|
& commName(COMM_GET), ' unsafe with multi-threads' |
| 318 |
|
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 319 |
|
|
STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
| 320 |
|
|
ENDIF |
| 321 |
|
|
ENDIF |
| 322 |
|
|
#endif /* ndef ALLOW_EXCH2 */ |
| 323 |
|
|
|
| 324 |
cnh |
1.1 |
RETURN |
| 325 |
|
|
END |
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