!> @file cpulog_mod.f90 !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 1997-2018 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: cpulog_mod.f90 2718 2018-01-02 08:49:38Z raasch $ ! Corrected "Former revisions" section ! ! 2696 2017-12-14 17:12:51Z kanani ! Change in file header (GPL part) ! ! 2266 2017-06-09 09:27:21Z raasch ! bugfix: cpu-time per grid point is now calculated using ngp_3d in order to ! avoid integer overflow, ! some re-formatting ! ! 2119 2017-01-17 16:51:50Z raasch ! ! 2118 2017-01-17 16:38:49Z raasch ! OpenACC relevant code removed ! ! 2000 2016-08-20 18:09:15Z knoop ! Forced header and separation lines into 80 columns ! ! 1931 2016-06-10 12:06:59Z suehring ! Adjustment in character length and format statement ! ! 1850 2016-04-08 13:29:27Z maronga ! Module renamed ! ! ! 1808 2016-04-05 19:44:00Z raasch ! cpu measurements are done with standard FORTRAN routine on every machine ! ! 1682 2015-10-07 23:56:08Z knoop ! Code annotations made doxygen readable ! ! 1402 2014-05-09 14:25:13Z raasch ! location messages added ! ! 1369 2014-04-24 05:57:38Z raasch ! routine description added ! ! 1353 2014-04-08 15:21:23Z heinze ! REAL constants provided with KIND-attribute ! ! 1322 2014-03-20 16:38:49Z raasch ! REAL functions provided with KIND-attribute ! ! 1320 2014-03-20 08:40:49Z raasch ! ONLY-attribute added to USE-statements, ! kind-parameters added to all INTEGER and REAL declaration statements, ! kinds are defined in new module kinds, ! revision history before 2012 removed, ! comment fields (!:) to be used for variable explanations added to ! all variable declaration statements ! ! 1318 2014-03-17 13:35:16Z raasch ! former files/routines cpu_log and cpu_statistics combined to one module, ! which also includes the former data module cpulog from the modules-file ! ! 1036 2012-10-22 13:43:42Z raasch ! code put under GPL (PALM 3.9) ! ! Revision 1.1 1997/07/24 11:12:29 raasch ! Initial revision ! ! ! Description: ! ------------ !> CPU-time measurements for any program part whatever. Results of the !> measurements are output at the end of the run in local file CPU_MEASURES. !> !> To measure the CPU-time (better to say the wallclock time) of a specific code !> segment, two calls of cpu_log have to be used as brackets in front and at the !> end of the segment: !> !> CALL cpu_log( log_point(n), 'any identifier', 'start' ) !> ... code segment ... !> CALL cpu_log( log_point(n), 'any identifier', 'stop' ) !> !> Parts of the code segment can be excluded from the measurement by additional !> call of cpu_log: !> !> ... first segment to be measured !> CALL cpu_log( log_point(n), 'any identifier', 'pause' ) !> ... oart of segment to be excluded from measurement !> CALL cpu_log( log_point(n), 'any identifier', 'continue' ) !> ... second segment to be mesasured !> !> n is an INTEGER within the interval [1,100] defining the id of the specific !> code segment, 'any identifier' is a string describing the code segment to be !> measured. It can be freely chosen and results will appear under this name in !> file CPU_MEASURES. ids can only be used once. If you like to do a !> measurement of a new part of the code, please look for an id which is unused !> ao far. !> !> d3par-parameter cpu_log_barrierwait can be used to set an MPI barrier at the !> beginning of the measurement (modus 'start' or 'continue'), to avoid that !> idle times (due to MPI calls in the code segment, which are !> waiting for other processes to be finished) affect the measurements. !> If barriers shall not be used at all, a fourth, optional parameter has to be !> given: !> !> CALL cpu_log( ..., ..., 'start', cpu_log_nowait ) !> !> Variable log_point should be used for non-overlapping code segments, and they !> should sum up to the total cpu-time required by the complete run. !> Variable log_point_s can be used for any other special (s) measurements. !------------------------------------------------------------------------------! MODULE cpulog USE control_parameters, & ONLY: message_string, nr_timesteps_this_run, run_description_header, & synchronous_exchange USE indices, & ONLY: ngp_3d, nx, ny, nz USE kinds USE pegrid IMPLICIT NONE PRIVATE PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, & initial_wallclock_time, log_point, log_point_s INTERFACE cpu_log MODULE PROCEDURE cpu_log END INTERFACE cpu_log INTERFACE cpu_statistics MODULE PROCEDURE cpu_statistics END INTERFACE cpu_statistics INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !< INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !< INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !< INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !< LOGICAL :: cpu_log_barrierwait = .FALSE. !< LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !< REAL(wp) :: initial_wallclock_time !< TYPE logpoint REAL(wp) :: isum !< REAL(wp) :: ivect !< REAL(wp) :: mean !< REAL(wp) :: mtime !< REAL(wp) :: mtimevec !< REAL(wp) :: sum !< REAL(wp) :: vector !< INTEGER(iwp) :: counts !< CHARACTER (LEN=25) :: place !< END TYPE logpoint TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_wp, 0.0_wp, & 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, & 0, ' ' ), & log_point_s = logpoint( 0.0_wp, 0.0_wp, & 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, & 0, ' ' ) SAVE CONTAINS !------------------------------------------------------------------------------! ! Description: ! ------------ !> @todo Missing subroutine description. !------------------------------------------------------------------------------! SUBROUTINE cpu_log( log_event, place, modus, barrierwait ) IMPLICIT NONE CHARACTER (LEN=*) :: modus !< CHARACTER (LEN=*) :: place !< LOGICAL :: wait_allowed !< LOGICAL, OPTIONAL :: barrierwait !< LOGICAL, SAVE :: first = .TRUE. !< REAL(wp) :: mtime = 0.0_wp !< REAL(wp) :: mtimevec = 0.0_wp !< TYPE(logpoint) :: log_event !< INTEGER(idp) :: count !< INTEGER(idp) :: count_rate !< ! !-- Initialize and check, respectively, point of measurement IF ( log_event%place == ' ' ) THEN log_event%place = place ELSEIF ( log_event%place /= place ) THEN WRITE( message_string, * ) 'wrong argument & expected: ', & TRIM(log_event%place), ' given: ', TRIM( place ) CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 ) ENDIF ! !-- Determine, if barriers are allowed to set IF ( PRESENT( barrierwait ) ) THEN wait_allowed = barrierwait ELSE wait_allowed = .TRUE. ENDIF ! !-- MPI barrier, if requested, in order to avoid measuring wait times !-- caused by MPI routines waiting for other MPI routines of other !-- PEs that have not yet finished #if defined( __parallel ) IF ( cpu_log_barrierwait .AND. wait_allowed .AND. & ( modus == 'start' .OR. modus == 'continue' ) ) THEN CALL MPI_BARRIER( comm2d, ierr ) ENDIF #endif ! !-- Take current time CALL SYSTEM_CLOCK( count, count_rate ) mtime = REAL( count, KIND=wp ) / REAL( count_rate, KIND=wp ) ! !-- Start, stop or pause measurement IF ( modus == 'start' .OR. modus == 'continue' ) THEN log_event%mtime = mtime log_event%mtimevec = mtimevec ELSEIF ( modus == 'pause' ) THEN IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN WRITE( message_string, * ) 'negative time interval occured', & ' &PE',myid,' L=PAUSE "',TRIM(log_event%place), & '" new=', mtime,' last=',log_event%mtime CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 ) first = .FALSE. ENDIF log_event%isum = log_event%isum + mtime - log_event%mtime log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec ELSEIF ( modus == 'stop' ) THEN IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. & first ) THEN WRITE( message_string, * ) 'negative time interval occured', & ' &PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', & mtime,' last=',log_event%mtime,' isum=',log_event%isum CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 ) first = .FALSE. ENDIF log_event%mtime = mtime - log_event%mtime + log_event%isum log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect log_event%sum = log_event%sum + log_event%mtime IF ( log_event%sum < 0.0 .AND. first ) THEN WRITE( message_string, * ) 'negative time interval occured', & ' &PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', & log_event%sum,' mtime=',log_event%mtime CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 ) first = .FALSE. ENDIF log_event%vector = log_event%vector + log_event%mtimevec log_event%counts = log_event%counts + 1 log_event%isum = 0.0_wp log_event%ivect = 0.0_wp ELSE message_string = 'unknown modus of time measurement: ' // & TRIM( modus ) CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 ) ENDIF END SUBROUTINE cpu_log !------------------------------------------------------------------------------! ! 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. !------------------------------------------------------------------------------! SUBROUTINE cpu_statistics IMPLICIT NONE INTEGER(iwp) :: i !< INTEGER(iwp) :: ii(1) !< INTEGER(iwp) :: iii !< INTEGER(iwp) :: sender !< REAL(wp) :: average_cputime !< REAL(wp), SAVE :: norm = 1.0_wp !< REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_max !< REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_min !< REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_rms !< REAL(wp), DIMENSION(:), ALLOCATABLE :: sum !< REAL(wp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !< CALL location_message( 'calculating cpu statistics', .FALSE. ) ! !-- 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_wp #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_wp ENDWHERE ! !-- Get total time in order to calculate CPU-time per gridpoint and !-- timestep IF ( nr_timesteps_this_run /= 0 ) THEN average_cputime = log_point(1)%sum / REAL( ngp_3d(0), KIND=wp ) / & REAL( nr_timesteps_this_run, KIND=wp ) * 1E6_wp ! in micro-sec ELSE average_cputime = -1.0_wp ENDIF ! !-- 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, nx+1, ny+1, nz, & nr_timesteps_this_run, average_cputime WRITE ( 18, 110 ) #else WRITE ( 18, 100 ) TRIM( run_description_header ), & numprocs * threads_per_task, 1, 1, & threads_per_task, nx+1, ny+1, nz, & nr_timesteps_this_run, average_cputime WRITE ( 18, 110 ) #endif DO ii = MAXLOC( sum ) i = ii(1) IF ( sum(i) /= -1.0_wp ) THEN WRITE ( 18, 102 ) & log_point(i)%place, log_point(i)%sum, & log_point(i)%sum / log_point(1)%sum * 100.0_wp, & log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i) sum(i) = -1.0_wp 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_wp #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_wp ENDWHERE ! !-- Write cpu-times sorted by size WRITE ( 18, 101 ) DO ii = MAXLOC( sum ) i = ii(1) IF ( sum(i) /= -1.0_wp ) 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_wp, & log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i) sum(i) = -1.0_wp ELSE EXIT ENDIF ENDDO ! !-- Output of handling of MPI operations IF ( collective_wait ) THEN WRITE ( 18, 103 ) ELSE WRITE ( 18, 104 ) ENDIF IF ( cpu_log_barrierwait ) WRITE ( 18, 111 ) 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 CALL location_message( 'finished', .TRUE. ) 100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', & &') tasks *',I5,' threads):'// & 'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ & 'nr of timesteps: ',22X,I6/ & 'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s') 101 FORMAT (/'special measures:'/ & &'-----------------------------------------------------------', & &'------------------------') 102 FORMAT (A25,2X,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 (//) 110 FORMAT ('-------------------------------------------------------------', & &'---------'//& &'place: mean counts min ',& &' max rms'/ & &' sec. % sec. ', & &' sec. sec.'/ & &'-----------------------------------------------------------', & &'------------------------') 111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements') END SUBROUTINE cpu_statistics END MODULE cpulog