source: palm/trunk/SOURCE/cpu_statistics.f90 @ 817

 SUBROUTINE cpu_statistics

!------------------------------------------------------------------------------!
! Current revisions:
! -----------------
! output of handling of ghostpoint exchange
!
! Former revisions:
! -----------------
! $Id: cpu_statistics.f90 683 2011-02-09 14:25:15Z raasch $
!
! 622 2010-12-10 08:08:13Z raasch
! output of handling of collective operations
!
! 222 2009-01-12 16:04:16Z letzel
! Bugfix for nonparallel execution
!
! 197 2008-09-16 15:29:03Z raasch
! Format adjustments in order to allow CPU# > 999,
! data are collected from PE0 in an ordered sequence which seems to avoid
! hanging of processes on SGI-ICE
!
! 82 2007-04-16 15:40:52Z raasch
! Preprocessor directives for old systems removed
!
! RCS Log replace by Id keyword, revision history cleaned up
!
! Revision 1.13  2006/04/26 12:10:51  raasch
! Output of number of threads per task, max = min in case of 1 PE
!
! Revision 1.1  1997/07/24 11:11:11  raasch
! Initial revision
!
!
! Description:
! ------------
! Analysis and output of the cpu-times measured. All PE results are collected
! on PE0 in order to calculate the mean cpu-time over all PEs and other
! statistics. The output is sorted according to the amount of cpu-time consumed
! and output on PE0.
!------------------------------------------------------------------------------!

    USE cpulog
    USE pegrid
    USE control_parameters

    IMPLICIT NONE

    INTEGER    ::  i, ii(1), iii, lp, sender
    REAL, SAVE ::  norm = 1.0
    REAL, DIMENSION(:),   ALLOCATABLE ::  pe_max, pe_min, pe_rms, sum
    REAL, DIMENSION(:,:), ALLOCATABLE ::  pe_log_points


!
!-- Compute cpu-times in seconds
    log_point%mtime  = log_point%mtime  / norm
    log_point%sum    = log_point%sum    / norm
    log_point%vector = log_point%vector / norm
    WHERE ( log_point%counts /= 0 )
       log_point%mean = log_point%sum / log_point%counts
    END WHERE


!
!-- Collect cpu-times from all PEs and calculate statistics
    IF ( myid == 0 )  THEN
!
!--    Allocate and initialize temporary arrays needed for statistics
       ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
                 pe_rms( SIZE( log_point ) ),                              &
                 pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
       pe_min = log_point%sum
       pe_max = log_point%sum    ! need to be set in case of 1 PE
       pe_rms = 0.0

#if defined( __parallel )
!
!--    Receive data from all PEs
       DO  i = 1, numprocs-1
          CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
                         i, i, comm2d, status, ierr )
          sender = status(MPI_SOURCE)
          pe_log_points(:,sender) = pe_max
       ENDDO
       pe_log_points(:,0) = log_point%sum   ! Results from PE0
!
!--    Calculate mean of all PEs, store it on log_point%sum
!--    and find minimum and maximum
       DO  iii = 1, SIZE( log_point )
          DO  i = 1, numprocs-1
             log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
             pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
             pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
          ENDDO
          log_point(iii)%sum = log_point(iii)%sum / numprocs
!
!--       Calculate rms
          DO  i = 0, numprocs-1
             pe_rms(iii) = pe_rms(iii) + ( &
                                 pe_log_points(iii,i) - log_point(iii)%sum &
                                         )**2
          ENDDO
          pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
       ENDDO
    ELSE
!
!--    Send data to PE0 (pe_max is used as temporary storage to send
!--    the data in order to avoid sending the data type log)
       ALLOCATE( pe_max( SIZE( log_point ) ) )
       pe_max = log_point%sum
       CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, myid, comm2d, &
                      ierr )
#endif

    ENDIF

!
!-- Write cpu-times
    IF ( myid == 0 )  THEN
!
!--    Re-store sums
       ALLOCATE( sum( SIZE( log_point ) ) )
       WHERE ( log_point%counts /= 0 )
          sum = log_point%sum
       ELSEWHERE
          sum = -1.0
       ENDWHERE

!
!--    Write cpu-times sorted by size
       CALL check_open( 18 )
#if defined( __parallel )
       WRITE ( 18, 100 )  TRIM( run_description_header ),        &
                          numprocs * threads_per_task, pdims(1), pdims(2), &
                          threads_per_task
#else
       WRITE ( 18, 100 )  TRIM( run_description_header ),        &
                          numprocs * threads_per_task, 1, 1, &
                          threads_per_task
#endif
       DO
          ii = MAXLOC( sum )
          i = ii(1)
          IF ( sum(i) /= -1.0 )  THEN
             WRITE ( 18, 102 ) &
                log_point(i)%place, log_point(i)%sum,                &
                log_point(i)%sum / log_point(1)%sum * 100.0,         &
                log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
             sum(i) = -1.0
          ELSE
             EXIT 
          ENDIF
       ENDDO
    ENDIF


!
!-- The same procedure again for the individual measurements.
!
!-- Compute cpu-times in seconds
    log_point_s%mtime  = log_point_s%mtime  / norm
    log_point_s%sum    = log_point_s%sum    / norm
    log_point_s%vector = log_point_s%vector / norm
    WHERE ( log_point_s%counts /= 0 )
       log_point_s%mean = log_point_s%sum / log_point_s%counts
    END WHERE

!
!-- Collect cpu-times from all PEs and calculate statistics
#if defined( __parallel )
!
!-- Set barrier in order to avoid that PE0 receives log_point_s-data
!-- while still busy with receiving log_point-data (see above)
    CALL MPI_BARRIER( comm2d, ierr )    
#endif
    IF ( myid == 0 )  THEN
!
!--    Initialize temporary arrays needed for statistics
       pe_min = log_point_s%sum
       pe_max = log_point_s%sum    ! need to be set in case of 1 PE
       pe_rms = 0.0

#if defined( __parallel )
!
!--    Receive data from all PEs
       DO  i = 1, numprocs-1
          CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
                         MPI_ANY_SOURCE, MPI_ANY_TAG, comm2d, status, ierr )
          sender = status(MPI_SOURCE)
          pe_log_points(:,sender) = pe_max
       ENDDO
       pe_log_points(:,0) = log_point_s%sum   ! Results from PE0
!
!--    Calculate mean of all PEs, store it on log_point_s%sum
!--    and find minimum and maximum
       DO  iii = 1, SIZE( log_point )
          DO  i = 1, numprocs-1
             log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points(iii,i)
             pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
             pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
          ENDDO
          log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
!
!--       Calculate rms
          DO  i = 0, numprocs-1
             pe_rms(iii) = pe_rms(iii) + ( &
                                 pe_log_points(iii,i) - log_point_s(iii)%sum &
                                         )**2
          ENDDO
          pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
       ENDDO
    ELSE
!
!--    Send data to PE0 (pe_max is used as temporary storage to send
!--    the data in order to avoid sending the data type log)
       pe_max = log_point_s%sum
       CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, 0, comm2d, &
                      ierr )
#endif

    ENDIF

!
!-- Write cpu-times
    IF ( myid == 0 )  THEN
!
!--    Re-store sums
       WHERE ( log_point_s%counts /= 0 )
          sum = log_point_s%sum
       ELSEWHERE
          sum = -1.0
       ENDWHERE

!
!--    Write cpu-times sorted by size
       WRITE ( 18, 101 )
       DO
          ii = MAXLOC( sum )
          i = ii(1)
          IF ( sum(i) /= -1.0 )  THEN
             WRITE ( 18, 102 ) &
                log_point_s(i)%place, log_point_s(i)%sum, &
                log_point_s(i)%sum / log_point(1)%sum * 100.0, &
                log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
             sum(i) = -1.0
          ELSE
             EXIT 
          ENDIF
       ENDDO

!
!--    Output of handling of MPI operations
       IF ( collective_wait )  THEN
          WRITE ( 18, 103 )
       ELSE
          WRITE ( 18, 104 )
       ENDIF
       IF ( synchronous_exchange )  THEN
          WRITE ( 18, 105 )
       ELSE
          WRITE ( 18, 106 )
       ENDIF

!
!--    Empty lines in order to create a gap to the results of the model 
!--    continuation runs
       WRITE ( 18, 107 )

!
!--    Unit 18 is not needed anymore
       CALL close_file( 18 )

    ENDIF


100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
            &') tasks *',I5,' threads):'/ &
             &'----------------------------------------------------------', &
             &'------------'//&
            &'place:                        mean        counts      min  ', &
             &'     max       rms'/ &
            &'                           sec.      %                sec. ', &
             &'     sec.      sec.'/  &
            &'-----------------------------------------------------------', &
             &'-------------------')

101 FORMAT (/'special measures:'/ &
            &'-----------------------------------------------------------', &
            &'--------------------')

102 FORMAT (A20,2X,F9.3,2X,F7.2,1X,I7,3(1X,F9.3))
103 FORMAT (/'Barriers are set in front of collective operations')
104 FORMAT (/'No barriers are set in front of collective operations')
105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
107 FORMAT (//)

 END SUBROUTINE cpu_statistics