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!
! Copyright (C) 2002-2011 Quantum ESPRESSO groups
! This file is distributed under the terms of the
! GNU General Public License. See the file `License'
! in the root directory of the present distribution,
! or http://www.gnu.org/copyleft/gpl.txt .
!
!
!==-----------------------------------------------------------------------==!
MODULE environment
!==-----------------------------------------------------------------------==!
USE kinds, ONLY: DP
USE io_files, ONLY: crash_file, nd_nmbr
USE io_global, ONLY: stdout, meta_ionode
USE mp_world, ONLY: nproc
USE mp_images, ONLY: me_image, my_image_id, root_image, nimage, &
nproc_image
USE mp_pools, ONLY: npool
USE mp_bands, ONLY: ntask_groups, nproc_bgrp, nbgrp
USE global_version, ONLY: version_number, svn_revision
IMPLICIT NONE
! ... title of the simulation
CHARACTER(LEN=75) :: title
SAVE
PRIVATE
PUBLIC :: environment_start
PUBLIC :: environment_end
!==-----------------------------------------------------------------------==!
CONTAINS
!==-----------------------------------------------------------------------==!
SUBROUTINE environment_start( code )
CHARACTER(LEN=*), INTENT(IN) :: code
LOGICAL :: exst, debug = .false.
CHARACTER(LEN=80) :: code_version, uname
CHARACTER(LEN=6), EXTERNAL :: int_to_char
INTEGER :: ios, crashunit
INTEGER, EXTERNAL :: find_free_unit
! ... Intel compilers v .ge.8 allocate a lot of stack space
! ... Stack limit is often small, thus causing SIGSEGV and crash
CALL remove_stack_limit ( )
! ... use ".FALSE." to disable all clocks except the total cpu time clock
! ... use ".TRUE." to enable clocks
CALL init_clocks( .TRUE. )
CALL start_clock( TRIM(code) )
code_version = TRIM (code) // " v." // TRIM (version_number)
IF ( TRIM (svn_revision) /= "unknown" ) code_version = &
TRIM (code_version) // " (svn rev. " // TRIM (svn_revision) // ")"
! ... for compatibility with PWSCF
#ifdef __MPI
nd_nmbr = TRIM ( int_to_char( me_image+1 ))
#else
nd_nmbr = ' '
#endif
IF( meta_ionode ) THEN
! ... search for file CRASH and delete it
INQUIRE( FILE=TRIM(crash_file), EXIST=exst )
IF( exst ) THEN
crashunit = find_free_unit()
OPEN( UNIT=crashunit, FILE=TRIM(crash_file), STATUS='OLD',IOSTAT=ios )
IF (ios==0) THEN
CLOSE( UNIT=crashunit, STATUS='DELETE', IOSTAT=ios )
ELSE
WRITE(stdout,'(5x,"Remark: CRASH file could not be deleted")')
END IF
END IF
ELSE
! ... one processor per image (other than meta_ionode)
! ... or, for debugging purposes, all processors,
! ... open their own standard output file
#if defined(DEBUG)
debug = .true.
#endif
IF (me_image == root_image .OR. debug ) THEN
uname = 'out.' // trim(int_to_char( my_image_id )) // '_' // &
trim(int_to_char( me_image))
OPEN ( unit = stdout, file = TRIM(uname),status='unknown')
ELSE
#if defined(_WIN32)
OPEN ( unit = stdout, file='NUL:', status='unknown' )
#else
OPEN ( unit = stdout, file='/dev/null', status='unknown' )
#endif
END IF
END IF
!
CALL opening_message( code_version )
#ifdef __MPI
CALL parallel_info ( )
#else
CALL serial_info()
#endif
END SUBROUTINE environment_start
!==-----------------------------------------------------------------------==!
SUBROUTINE environment_end( code )
CHARACTER(LEN=*), INTENT(IN) :: code
IF ( meta_ionode ) WRITE( stdout, * )
CALL stop_clock( TRIM(code) )
CALL print_clock( TRIM(code) )
CALL closing_message( )
IF( meta_ionode ) THEN
WRITE( stdout,'(A)') ' JOB DONE.'
WRITE( stdout,3335)
END IF
3335 FORMAT('=',78('-'),'=')
CALL flush_unit(stdout)
RETURN
END SUBROUTINE environment_end
!==-----------------------------------------------------------------------==!
SUBROUTINE opening_message( code_version )
CHARACTER(LEN=*), INTENT(IN) :: code_version
CHARACTER(LEN=9) :: cdate, ctime
CALL date_and_tim( cdate, ctime )
!
WRITE( stdout, '(/5X,"Program ",A," starts on ",A9," at ",A9)' ) &
TRIM(code_version), cdate, ctime
!
WRITE( stdout, '(/5X,"This program is part of the open-source Quantum ",&
& "ESPRESSO suite", &
&/5X,"for quantum simulation of materials; please cite", &
&/9X,"""P. Giannozzi et al., J. Phys.:Condens. Matter 21 ",&
& "395502 (2009);", &
&/9X," URL http://www.quantum-espresso.org"", ", &
&/5X,"in publications or presentations arising from this work. More details at",&
&/5x,"http://www.quantum-espresso.org/quote")' )
RETURN
END SUBROUTINE opening_message
!==-----------------------------------------------------------------------==!
SUBROUTINE closing_message( )
CHARACTER(LEN=9) :: cdate, ctime
CHARACTER(LEN=80) :: time_str
CALL date_and_tim( cdate, ctime )
time_str = 'This run was terminated on: ' // ctime // ' ' // cdate
IF( meta_ionode ) THEN
WRITE( stdout,*)
WRITE( stdout,3334) time_str
WRITE( stdout,3335)
END IF
3334 FORMAT(3X,A60,/)
3335 FORMAT('=',78('-'),'=')
RETURN
END SUBROUTINE closing_message
!==-----------------------------------------------------------------------==!
SUBROUTINE parallel_info ( )
!
#if defined(__OPENMP)
INTEGER, EXTERNAL :: omp_get_max_threads
#endif
!
#if defined(__OPENMP)
WRITE( stdout, '(/5X,"Parallel version (MPI & OpenMP), running on ",&
&I7," processor cores")' ) nproc * omp_get_max_threads()
!
WRITE( stdout, '(5X,"Number of MPI processes: ",I7)' ) nproc
!
WRITE( stdout, '(5X,"Threads/MPI process: ",I7)' ) &
omp_get_max_threads()
#else
WRITE( stdout, '(/5X,"Parallel version (MPI), running on ",&
&I5," processors")' ) nproc
#endif
!
IF ( nimage > 1 ) WRITE( stdout, &
'(5X,"path-images division: nimage = ",I7)' ) nimage
IF ( npool > 1 ) WRITE( stdout, &
'(5X,"K-points division: npool = ",I7)' ) npool
IF ( nbgrp > 1 ) WRITE( stdout, &
'(5X,"band groups division: nbgrp = ",I7)' ) nbgrp
IF ( nproc_bgrp > 1 ) WRITE( stdout, &
'(5X,"R & G space division: proc/nbgrp/npool/nimage = ",I7)' ) nproc_bgrp
IF ( ntask_groups > 1 ) WRITE( stdout, &
'(5X,"wavefunctions fft division: fft and procs/group = ",2I7)' ) &
ntask_groups, nproc_bgrp / ntask_groups
!
END SUBROUTINE parallel_info
!==-----------------------------------------------------------------------==!
SUBROUTINE serial_info ( )
!
#if defined(__OPENMP)
INTEGER, EXTERNAL :: omp_get_max_threads
#endif
!
#if defined(__OPENMP)
WRITE( stdout, '(/5X,"Serial multi-threaded version, running on ",&
&I4," processor cores")' ) omp_get_max_threads()
!
#else
WRITE( stdout, '(/5X,"Serial version")' )
#endif
!
END SUBROUTINE serial_info
!==-----------------------------------------------------------------------==!
END MODULE environment
!==-----------------------------------------------------------------------==!
|
