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C $Header: /u/gcmpack/MITgcm/eesupp/src/eeboot_minimal.F,v 1.30 2017/06/20 11:32:11 mlosch Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_EEOPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: EEBOOT_MINIMAL |
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|
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C !INTERFACE: |
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SUBROUTINE EEBOOT_MINIMAL( myComm ) |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE EEBOOT\_MINIMAL |
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C | o Set an initial environment that is predictable i.e. |
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C | behaves in a similar way on all machines and stable. |
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C *==========================================================* |
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C | Under MPI this routine calls MPI\_INIT to setup the |
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C | mpi environment ( on some systems the code is running as |
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C | a single process prior to MPI\_INIT, on others the mpirun |
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C | script has already created multiple processes). Until |
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C | MPI\_Init is called it is unclear what state the |
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C | application is in. Once this routine has been run it is |
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C | "safe" to do things like I/O to report erros and to get |
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C | run parameters. |
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C | Note: This routine can also be compiled with CPP |
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C | directives set so that no multi-processing is initialise. |
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C | This is OK and will work fine. |
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C *==========================================================* |
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|
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C !USES: |
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IMPLICIT NONE |
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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" |
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|
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C !ROUTINE ARGUMENTS |
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C == Routine arguments == |
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C myComm :: Communicator that is passed down from |
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C upper level driver (if there is one). |
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INTEGER myComm |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C myThid :: Temp. dummy thread number. |
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C fNam :: Used to build file name for standard and error output. |
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C msgBuf :: Used to build messages for printing. |
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INTEGER myThid |
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#ifdef USE_PDAF |
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CHARACTER*18 fNam |
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#else |
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CHARACTER*13 fNam |
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#endif /* USE_PDAF */ |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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#ifdef ALLOW_USE_MPI |
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C mpiRC :: Error code reporting variable used with MPI. |
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INTEGER mpiRC |
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INTEGER mpiIsInitialized |
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LOGICAL doReport |
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#if defined(ALLOW_OASIS) || defined(COMPONENT_MODULE) |
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INTEGER mpiMyWid |
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#endif |
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#if defined(ALLOW_NEST_PARENT) || defined(ALLOW_NEST_CHILD) |
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INTEGER mpiMyWid, color |
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#endif |
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#ifdef USE_PDAF |
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INTEGER mpi_task_id |
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#endif /* USE_PDAF */ |
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#endif /* ALLOW_USE_MPI */ |
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CEOP |
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|
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C-- Default values set to single processor case |
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numberOfProcs = 1 |
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myProcId = 0 |
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pidIO = myProcId |
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myProcessStr = '------' |
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C Set a dummy value for myThid because we are not multi-threading yet. |
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myThid = 1 |
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|
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C Annoyingly there is no universal way to have the usingMPI |
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C parameter work as one might expect. This is because, on some |
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C systems I/O does not work until MPI_Init has been called. |
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C The solution for now is that the parameter below may need to |
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C be changed manually! |
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#ifdef ALLOW_USE_MPI |
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usingMPI = .TRUE. |
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#else |
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usingMPI = .FALSE. |
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#endif |
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|
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IF ( .NOT.usingMPI ) THEN |
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|
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WRITE(myProcessStr,'(I4.4)') myProcId |
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WRITE(fNam,'(A,A)') 'STDERR.', myProcessStr(1:4) |
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OPEN(errorMessageUnit,FILE=fNam,STATUS='unknown') |
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c WRITE(fNam,'(A,A)') 'STDOUT.', myProcessStr(1:4) |
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c OPEN(standardMessageUnit,FILE=fNam,STATUS='unknown') |
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|
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#ifdef ALLOW_USE_MPI |
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ELSE |
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C-- MPI style multiple-process initialisation |
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C-- ========================================= |
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|
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CALL MPI_Initialized( mpiIsInitialized, mpiRC ) |
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|
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IF ( mpiIsInitialized .EQ. 0 ) THEN |
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C-- Initialise MPI multi-process parallel environment. |
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C On some systems program forks at this point. Others have already |
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C forked within mpirun - now thats an open standard! |
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CALL MPI_INIT( mpiRC ) |
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IF ( mpiRC .NE. MPI_SUCCESS ) THEN |
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eeBootError = .TRUE. |
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WRITE(msgBuf,'(A,I5)') |
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& 'EEBOOT_MINIMAL: MPI_INIT return code', mpiRC |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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GOTO 999 |
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ENDIF |
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|
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C-- MPI has now been initialized ; now we need to either |
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C ask for a communicator or pretend that we have: |
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C Pretend that we have asked for a communicator |
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MPI_COMM_MODEL = MPI_COMM_WORLD |
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|
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ELSE |
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C-- MPI was already initialized and communicator has been passed |
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C down from upper level driver |
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MPI_COMM_MODEL = myComm |
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|
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ENDIF |
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|
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doReport = .FALSE. |
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#ifdef USE_PDAF |
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C initialize PDAF |
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C for more output increase second parameter from 1 to 2 |
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CALL INIT_PARALLEL_PDAF(0, 1, MPI_COMM_MODEL, MPI_COMM_MODEL, |
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& mpi_task_id) |
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#endif /* USE_PDAF */ |
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|
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#ifdef ALLOW_OASIS |
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C add a 1rst preliminary call EESET_PARAMS to set useOASIS |
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C (needed to decide either to call OASIS_INIT or not) |
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CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpiMyWId, mpiRC ) |
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CALL EESET_PARMS ( mpiMyWId, doReport ) |
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IF ( useOASIS ) CALL OASIS_INIT(MPI_COMM_MODEL) |
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#endif /* ALLOW_OASIS */ |
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|
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#ifdef COMPONENT_MODULE |
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C-- Set the running directory |
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CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpiMyWId, mpiRC ) |
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CALL SETDIR( mpiMyWId ) |
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|
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C- jmc: test: |
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C add a 1rst preliminary call EESET_PARAMS to set useCoupler |
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C (needed to decide either to call CPL_INIT or not) |
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CALL EESET_PARMS ( mpiMyWId, doReport ) |
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C- jmc: test end ; otherwise, uncomment next line: |
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c useCoupler = .TRUE. |
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|
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C-- Ask coupler interface for a communicator |
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IF ( useCoupler) CALL CPL_INIT |
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#endif /* COMPONENT_MODULE */ |
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|
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C-- Case with Nest(ing) |
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#if defined(ALLOW_NEST_PARENT) || defined(ALLOW_NEST_CHILD) |
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C-- Set the running directory |
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CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpiMyWId, mpiRC ) |
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CALL SETDIR( mpiMyWId ) |
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|
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C-- Setup Nesting Execution Environment |
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CALL NEST_EEINIT( mpiMyWId, color ) |
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#endif /* ALLOW_NEST_PARENT | ALLOW_NEST_CHILD */ |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Get my process number |
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CALL MPI_COMM_RANK( MPI_COMM_MODEL, mpiMyId, mpiRC ) |
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IF ( mpiRC .NE. MPI_SUCCESS ) THEN |
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eeBootError = .TRUE. |
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WRITE(msgBuf,'(A,I5)') |
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& 'EEBOOT_MINIMAL: MPI_COMM_RANK return code', mpiRC |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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GOTO 999 |
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ENDIF |
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myProcId = mpiMyId |
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#ifdef USE_PDAF |
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WRITE(myProcessStr,'(I4.4,A1,I4.4)') mpi_task_id,'.',myProcId |
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#else |
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WRITE(myProcessStr,'(I4.4)') myProcId |
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#endif /* USE_PDAF */ |
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mpiPidIo = myProcId |
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pidIO = mpiPidIo |
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IF ( mpiPidIo .EQ. myProcId ) THEN |
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#ifdef SINGLE_DISK_IO |
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IF( myProcId .EQ. 0 ) THEN |
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#endif |
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WRITE(fNam,'(A,A)') 'STDERR.', myProcessStr(1:4) |
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#ifdef USE_PDAF |
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WRITE(fNam,'(A,A)') 'STDERR.', myProcessStr(1:9) |
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#endif |
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OPEN(errorMessageUnit,FILE=fNam,STATUS='unknown') |
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WRITE(fNam,'(A,A)') 'STDOUT.', myProcessStr(1:4) |
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#ifdef USE_PDAF |
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WRITE(fNam,'(A,A)') 'STDOUT.', myProcessStr(1:9) |
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#endif |
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OPEN(standardMessageUnit,FILE=fNam,STATUS='unknown') |
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#ifdef SINGLE_DISK_IO |
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ELSE |
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OPEN(errorMessageUnit,FILE='/dev/null',STATUS='unknown') |
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standardMessageUnit=errorMessageUnit |
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ENDIF |
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IF( myProcId .EQ. 0 ) THEN |
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WRITE(msgBuf,'(2A)') '** WARNING ** EEBOOT_MINIMAL: ', |
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& 'defined SINGLE_DISK_IO will result in losing' |
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CALL PRINT_MESSAGE( msgBuf, errorMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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WRITE(msgBuf,'(2A)') '** WARNING ** EEBOOT_MINIMAL: ', |
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& 'any message (error/warning) from any proc <> 0' |
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CALL PRINT_MESSAGE( msgBuf, errorMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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ENDIF |
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#endif |
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ENDIF |
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|
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#if defined(ALLOW_NEST_PARENT) || defined(ALLOW_NEST_CHILD) |
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WRITE(standardMessageUnit,'(2(A,I6))') |
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& ' mpiMyWId =', mpiMyWId, ' , color =',color |
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#endif /* ALLOW_NEST_PARENT | ALLOW_NEST_CHILD */ |
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|
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C-- Synchronise all processes |
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C Strictly this is superfluous, but by using it we can guarantee to |
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C find out about processes that did not start up. |
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CALL MPI_BARRIER( MPI_COMM_MODEL, mpiRC ) |
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IF ( mpiRC .NE. MPI_SUCCESS ) THEN |
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eeBootError = .TRUE. |
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WRITE(msgBuf,'(A,I6)') |
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& 'EEBOOT_MINIMAL: MPI_BARRIER return code', mpiRC |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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GOTO 999 |
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ENDIF |
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|
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C-- Get number of MPI processes |
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CALL MPI_COMM_SIZE ( MPI_COMM_MODEL, mpiNProcs, mpiRC ) |
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IF ( mpiRC .NE. MPI_SUCCESS ) THEN |
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eeBootError = .TRUE. |
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WRITE(msgBuf,'(A,I6)') |
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& 'EEBOOT_MINIMAL: MPI_COMM_SIZE return code', mpiRC |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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GOTO 999 |
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ENDIF |
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numberOfProcs = mpiNProcs |
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|
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#endif /* ALLOW_USE_MPI */ |
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ENDIF |
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|
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C-- Under MPI only allow same number of processes as proc grid size. |
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C Strictly we are allowed more procs but knowing there |
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C is an exact match makes things easier. |
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IF ( numberOfProcs .NE. nPx*nPy ) THEN |
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eeBootError = .TRUE. |
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WRITE(msgBuf,'(2(A,I6))') |
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& 'EEBOOT_MINIMAL: No. of procs=', numberOfProcs, |
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& ' not equal to nPx*nPy=', nPx*nPy |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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GOTO 999 |
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ENDIF |
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|
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#ifdef USE_LIBHPM |
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CALL F_HPMINIT(myProcId, "mitgcmuv") |
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#endif |
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|
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999 CONTINUE |
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RETURN |
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END |
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