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source: palm/trunk/SOURCE/cpulog_mod.f90 @ 4712

Last change on this file since 4712 was 4665, checked in by hellstea, 4 years ago
Interpolation and anterpolation subroutines renamed and all missing subroutine description comments added (pmc_interface_mod). Format descriptor 102 slightly modified (cpulog_mod).
Property svn:keywords set to `Id`
File size: 23.2 KB

Rev	Line
[1850]	1	!> @file cpulog_mod.f90
[4559]	2	!--------------------------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	4	!
[4559]	5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
	6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
	7	! (at your option) any later version.
[1036]	8	!
[4559]	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
	10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
	11	! Public License for more details.
[1036]	12	!
[4559]	13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
	14	! <http://www.gnu.org/licenses/>.
[1036]	15	!
[4360]	16	! Copyright 1997-2020 Leibniz Universitaet Hannover
[2000]	17	!------------------------------------------------------------------------------!
[1036]	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[4665]	21	!
	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: cpulog_mod.f90 4665 2020-09-03 14:04:24Z suehring $
[4665]	26	! Format descriptor 102 slightly modified.
	27	!
	28	! 4577 2020-06-25 09:53:58Z raasch
[4577]	29	! further re-formatting concerning Fortran parameter variables
	30	!
	31	! 4559 2020-06-11 08:51:48Z raasch
[4559]	32	! file re-formatted to follow the PALM coding standard
	33	!
	34	! 4549 2020-05-29 09:27:29Z raasch
[4549]	35	! bugfix for r4539: values for min/max/rms stored in separate arrays
[4559]	36	!
[4549]	37	! 4539 2020-05-18 14:05:17Z raasch
[4539]	38	! code re-structured,
	39	! cpu time per grid point and timestep does not included initialization and spinup any more
[4559]	40	!
[4539]	41	! 4536 2020-05-17 17:24:13Z raasch
[4536]	42	! restart I/O transfer speed added
[4559]	43	!
[4536]	44	! 4429 2020-02-27 15:24:30Z raasch
[4429]	45	! bugfix: cpp-directives added for serial mode
[4559]	46	!
[4429]	47	! 4378 2020-01-16 13:22:48Z Giersch
[4378]	48	! Format of rms output changed to allow values >= 100
[4559]	49	!
[4378]	50	! 4360 2020-01-07 11:25:50Z suehring
[4182]	51	! Corrected "Former revisions" section
[4559]	52	!
[4182]	53	! 4015 2019-06-05 13:25:35Z raasch
[4559]	54	! all reals changed to double precision in order to work with 32-bit working precision, otherwise
	55	! calculated time intervals would mostly give zero
	56	!
[4015]	57	! 3885 2019-04-11 11:29:34Z kanani
[4559]	58	! Changes related to global restructuring of location messages and introduction of additional debug
	59	! messages
	60	!
[3885]	61	! 3655 2019-01-07 16:51:22Z knoop
[3483]	62	! output format limited to a maximum line length of 80
[2716]	63	!
[4182]	64	! Revision 1.1 1997/07/24 11:12:29 raasch
	65	! Initial revision
	66	!
	67	!
[1]	68	! Description:
	69	! ------------
[4559]	70	!> CPU-time measurements for any program part whatever. Results of the measurements are output at
	71	!> the end of the run in local file CPU_MEASURES.
[1682]	72	!>
[4559]	73	!> To measure the CPU-time (better to say the wallclock time) of a specific code segment, two calls
	74	!> of cpu_log have to be used as brackets in front and at the end of the segment:
[1682]	75	!>
	76	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
	77	!> ... code segment ...
	78	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
	79	!>
[4559]	80	!> Parts of the code segment can be excluded from the measurement by additional call of cpu_log:
[1682]	81	!>
	82	!> ... first segment to be measured
	83	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
	84	!> ... oart of segment to be excluded from measurement
	85	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
	86	!> ... second segment to be mesasured
	87	!>
[4559]	88	!> n is an INTEGER within the interval [1,100] defining the id of the specific code segment,
	89	!> 'any identifier' is a string describing the code segment to be measured. It can be freely chosen
	90	!> and results will appear under this name in file CPU_MEASURES. ids can only be used once. If you
	91	!> like to do a measurement of a new part of the code, please look for an id which is unused so far.
[1682]	92	!>
[4559]	93	!> runtime_parameters-parameter cpu_log_barrierwait can be used to set an MPI barrier at the
	94	!> beginning of the measurement (modus 'start' or 'continue'), to avoid that idle times (due to MPI
	95	!> calls in the code segment, which are waiting for other processes to be finished) affect the
	96	!> measurements.
[1682]	97	!> If barriers shall not be used at all, a fourth, optional parameter has to be
	98	!> given:
	99	!>
	100	!> CALL cpu_log( ..., ..., 'start', cpu_log_nowait )
	101	!>
[4559]	102	!> Variable log_point should be used for non-overlapping code segments, and they should sum up to
	103	!> the total cpu-time required by the complete run.
[1682]	104	!> Variable log_point_s can be used for any other special (s) measurements.
[4559]	105	!--------------------------------------------------------------------------------------------------!
[1682]	106	MODULE cpulog
[1]	107
[4559]	108
[4015]	109	USE control_parameters, &
[4536]	110	ONLY: message_string, nr_timesteps_this_run, restart_data_format_output, &
	111	restart_file_size, run_description_header, synchronous_exchange, write_binary
[4559]	112
[4015]	113	USE indices, &
[2266]	114	ONLY: ngp_3d, nx, ny, nz
[4559]	115
[1320]	116	USE kinds
[4559]	117
[1]	118	USE pegrid
	119
	120	IMPLICIT NONE
	121
[1318]	122	PRIVATE
[4015]	123	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, initial_wallclock_time, &
	124	log_point, log_point_s
[1]	125
[1318]	126	INTERFACE cpu_log
	127	MODULE PROCEDURE cpu_log
	128	END INTERFACE cpu_log
	129
	130	INTERFACE cpu_statistics
	131	MODULE PROCEDURE cpu_statistics
	132	END INTERFACE cpu_statistics
	133
[4559]	134	INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !<
	135	INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !<
	136	INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !<
	137	INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !<
[1318]	138
[4559]	139	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
[1318]	140
[4577]	141	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
	142
[4015]	143	REAL(dp) :: initial_wallclock_time !<
[1318]	144
	145	TYPE logpoint
[4015]	146	REAL(dp) :: isum !<
	147	REAL(dp) :: ivect !<
	148	REAL(dp) :: mean !<
	149	REAL(dp) :: mtime !<
	150	REAL(dp) :: mtimevec !<
	151	REAL(dp) :: sum !<
	152	REAL(dp) :: vector !<
[4559]	153	INTEGER(iwp) :: counts !<
	154	CHARACTER (LEN=25) :: place !<
[1318]	155	END TYPE logpoint
	156
[4015]	157	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
	158	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
	159	TYPE(logpoint), DIMENSION(100) :: log_point_s = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
	160	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
[1318]	161
	162	SAVE
	163
	164	CONTAINS
	165
[1682]	166	!------------------------------------------------------------------------------!
	167	! Description:
	168	! ------------
	169	!> @todo Missing subroutine description.
	170	!------------------------------------------------------------------------------!
[1318]	171	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
	172
	173	IMPLICIT NONE
	174
[4559]	175	CHARACTER (LEN=*) :: modus !<
	176	CHARACTER (LEN=*) :: place !<
	177
	178	LOGICAL :: wait_allowed !<
	179	LOGICAL, OPTIONAL :: barrierwait !<
	180	LOGICAL, SAVE :: first = .TRUE. !<
	181
[4015]	182	REAL(dp) :: mtime = 0.0_dp !<
	183	REAL(dp) :: mtimevec = 0.0_dp !<
[4559]	184	TYPE(logpoint) :: log_event !<
[1318]	185
[4559]	186	INTEGER(idp) :: count !<
	187	INTEGER(idp) :: count_rate !<
[1]	188
	189
	190	!
[1318]	191	!-- Initialize and check, respectively, point of measurement
	192	IF ( log_event%place == ' ' ) THEN
	193	log_event%place = place
	194	ELSEIF ( log_event%place /= place ) THEN
[4015]	195	WRITE( message_string, * ) 'wrong argument expected: ', &
	196	TRIM(log_event%place), ' given: ', TRIM( place )
[1318]	197	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
	198	ENDIF
[1]	199
	200	!
[1318]	201	!-- Determine, if barriers are allowed to set
	202	IF ( PRESENT( barrierwait ) ) THEN
	203	wait_allowed = barrierwait
	204	ELSE
	205	wait_allowed = .TRUE.
	206	ENDIF
	207
	208	!
	209	!-- MPI barrier, if requested, in order to avoid measuring wait times
	210	!-- caused by MPI routines waiting for other MPI routines of other
	211	!-- PEs that have not yet finished
	212	#if defined( __parallel )
[4015]	213	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
[1318]	214	( modus == 'start' .OR. modus == 'continue' ) ) THEN
	215	CALL MPI_BARRIER( comm2d, ierr )
	216	ENDIF
	217	#endif
	218
	219	!
	220	!-- Take current time
	221	CALL SYSTEM_CLOCK( count, count_rate )
[4015]	222	mtime = REAL( count, KIND=dp ) / REAL( count_rate, KIND=dp )
[1]	223
	224	!
[1318]	225	!-- Start, stop or pause measurement
	226	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
	227	log_event%mtime = mtime
	228	log_event%mtimevec = mtimevec
	229	ELSEIF ( modus == 'pause' ) THEN
	230	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
[4015]	231	WRITE( message_string, * ) 'negative time interval occured', &
	232	'&PE',myid,' L=PAUSE "',TRIM(log_event%place), &
	233	'" new=', mtime,' last=',log_event%mtime
[1318]	234	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
	235	first = .FALSE.
	236	ENDIF
	237	log_event%isum = log_event%isum + mtime - log_event%mtime
	238	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
	239	ELSEIF ( modus == 'stop' ) THEN
[4015]	240	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. first ) THEN
	241	WRITE( message_string, * ) 'negative time interval occured', &
	242	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
	243	mtime,' last=',log_event%mtime,' isum=',log_event%isum
[1318]	244	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
	245	first = .FALSE.
	246	ENDIF
	247	log_event%mtime = mtime - log_event%mtime + log_event%isum
	248	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
	249	log_event%sum = log_event%sum + log_event%mtime
	250	IF ( log_event%sum < 0.0 .AND. first ) THEN
[4015]	251	WRITE( message_string, * ) 'negative time interval occured', &
	252	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
	253	log_event%sum,' mtime=',log_event%mtime
[1318]	254	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
	255	first = .FALSE.
	256	ENDIF
	257	log_event%vector = log_event%vector + log_event%mtimevec
	258	log_event%counts = log_event%counts + 1
[4015]	259	log_event%isum = 0.0_dp
	260	log_event%ivect = 0.0_dp
[1318]	261	ELSE
[4015]	262	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
[1318]	263	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
[1]	264	ENDIF
[1318]	265
	266	END SUBROUTINE cpu_log
	267
	268
	269	!------------------------------------------------------------------------------!
	270	! Description:
	271	! ------------
[1682]	272	!> Analysis and output of the cpu-times measured. All PE results are collected
	273	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
	274	!> statistics. The output is sorted according to the amount of cpu-time consumed
	275	!> and output on PE0.
[1318]	276	!------------------------------------------------------------------------------!
[4559]	277
[1682]	278	SUBROUTINE cpu_statistics
[1318]	279
	280	IMPLICIT NONE
	281
[4559]	282	INTEGER(iwp) :: i !<
	283	INTEGER(iwp) :: ii(1) !<
[4429]	284	#if defined( __parallel )
[4559]	285	INTEGER(iwp) :: iii !<
[4429]	286	INTEGER(iwp) :: sender !<
	287	#endif
[4015]	288	REAL(dp) :: average_cputime !<
	289	REAL(dp), SAVE :: norm = 1.0_dp !<
[4549]	290	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max !<
	291	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max_s !<
	292	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min !<
	293	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min_s !<
	294	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
	295	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms_s !<
	296	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp !<
	297	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp_s !<
	298	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum !<
	299	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum_s !<
	300	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
	301	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points_s !<
[1318]	302
	303
[3885]	304	CALL location_message( 'calculating cpu statistics', 'start' )
[1402]	305
[1318]	306	!
[4539]	307	!-- Compute CPU-times in seconds for the global non-overlapping measurements.
[1318]	308	log_point%mtime = log_point%mtime / norm
	309	log_point%sum = log_point%sum / norm
	310	log_point%vector = log_point%vector / norm
	311	WHERE ( log_point%counts /= 0 )
	312	log_point%mean = log_point%sum / log_point%counts
	313	END WHERE
	314
	315
	316	!
[4539]	317	!-- Collect CPU-times from all PEs and calculate statistics
[1318]	318	IF ( myid == 0 ) THEN
	319	!
	320	!-- Allocate and initialize temporary arrays needed for statistics
[4015]	321	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
	322	pe_rms( SIZE( log_point ) ), pe_tmp( SIZE( log_point ) ), &
[1318]	323	pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
	324	pe_min = log_point%sum
	325	pe_max = log_point%sum ! need to be set in case of 1 PE
[4015]	326	pe_rms = 0.0_dp
	327	pe_tmp = 0.0_dp
[1318]	328
	329	#if defined( __parallel )
	330	!
	331	!-- Receive data from all PEs
	332	DO i = 1, numprocs-1
[4015]	333	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, i, i, comm2d, &
	334	status, ierr )
[1318]	335	sender = status(MPI_SOURCE)
[3229]	336	pe_log_points(:,sender) = pe_tmp
[1318]	337	ENDDO
	338	pe_log_points(:,0) = log_point%sum ! Results from PE0
	339	!
	340	!-- Calculate mean of all PEs, store it on log_point%sum
	341	!-- and find minimum and maximum
	342	DO iii = 1, SIZE( log_point )
	343	DO i = 1, numprocs-1
	344	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
	345	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	346	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	347	ENDDO
	348	log_point(iii)%sum = log_point(iii)%sum / numprocs
	349	!
	350	!-- Calculate rms
	351	DO i = 0, numprocs-1
[4015]	352	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point(iii)%sum )**2
[1318]	353	ENDDO
	354	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	355	ENDDO
	356	ELSE
	357	!
	358	!-- Send data to PE0 (pe_max is used as temporary storage to send
	359	!-- the data in order to avoid sending the data type log)
	360	ALLOCATE( pe_max( SIZE( log_point ) ) )
	361	pe_max = log_point%sum
[4015]	362	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, myid, comm2d, ierr )
[1318]	363	#endif
	364
[1]	365	ENDIF
[1318]	366
	367	!
[4539]	368	!-- The same procedure again for the special measurements.
[1318]	369	!
	370	!-- Compute cpu-times in seconds
	371	log_point_s%mtime = log_point_s%mtime / norm
	372	log_point_s%sum = log_point_s%sum / norm
	373	log_point_s%vector = log_point_s%vector / norm
	374	WHERE ( log_point_s%counts /= 0 )
	375	log_point_s%mean = log_point_s%sum / log_point_s%counts
	376	END WHERE
	377
	378	!
[4539]	379	!-- Collect CPU-times from all PEs and calculate statistics
[1318]	380	#if defined( __parallel )
	381	!
	382	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
	383	!-- while still busy with receiving log_point-data (see above)
	384	CALL MPI_BARRIER( comm2d, ierr )
	385	#endif
	386	IF ( myid == 0 ) THEN
	387	!
[4549]	388	!-- Allocate and initialize temporary arrays needed for statistics
	389	ALLOCATE( pe_max_s( SIZE( log_point_s ) ), pe_min_s( SIZE( log_point_s ) ), &
	390	pe_rms_s( SIZE( log_point_s ) ), pe_tmp_s( SIZE( log_point_s ) ), &
	391	pe_log_points_s( SIZE( log_point_s ), 0:numprocs-1 ) )
	392	pe_min_s = log_point_s%sum
	393	pe_max_s = log_point_s%sum ! need to be set in case of 1 PE
	394	pe_rms_s = 0.0_dp
[1318]	395
	396	#if defined( __parallel )
	397	!
	398	!-- Receive data from all PEs
	399	DO i = 1, numprocs-1
[4549]	400	CALL MPI_RECV( pe_tmp_s(1), SIZE( log_point_s ), MPI_DOUBLE_PRECISION, &
	401	MPI_ANY_SOURCE, MPI_ANY_TAG, comm2d, status, ierr )
[1318]	402	sender = status(MPI_SOURCE)
[4549]	403	pe_log_points_s(:,sender) = pe_tmp_s
[1318]	404	ENDDO
[4549]	405	pe_log_points_s(:,0) = log_point_s%sum ! Results from PE0
[1318]	406	!
	407	!-- Calculate mean of all PEs, store it on log_point_s%sum
	408	!-- and find minimum and maximum
[4549]	409	DO iii = 1, SIZE( log_point_s )
[1318]	410	DO i = 1, numprocs-1
[4549]	411	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points_s(iii,i)
	412	pe_min_s(iii) = MIN( pe_min_s(iii), pe_log_points_s(iii,i) )
	413	pe_max_s(iii) = MAX( pe_max_s(iii), pe_log_points_s(iii,i) )
[1318]	414	ENDDO
	415	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
	416	!
	417	!-- Calculate rms
	418	DO i = 0, numprocs-1
[4549]	419	pe_rms_s(iii) = pe_rms_s(iii) + ( pe_log_points_s(iii,i) - log_point_s(iii)%sum )**2
[1318]	420	ENDDO
[4549]	421	pe_rms_s(iii) = SQRT( pe_rms_s(iii) / numprocs )
[1318]	422	ENDDO
	423	ELSE
	424	!
	425	!-- Send data to PE0 (pe_max is used as temporary storage to send
	426	!-- the data in order to avoid sending the data type log)
[4549]	427	ALLOCATE( pe_max_s( SIZE( log_point_s ) ) )
	428	pe_max_s = log_point_s%sum
	429	CALL MPI_SEND( pe_max_s(1), SIZE( log_point_s ), MPI_DOUBLE_PRECISION, 0, 0, comm2d, &
	430	ierr )
[1318]	431	#endif
	432
	433	ENDIF
[4539]	434	!
	435	!-- Write CPU-times for the non-overlapping measurements.
	436	IF ( myid == 0 ) THEN
	437	!
	438	!-- Re-store sums
	439	ALLOCATE( sum( SIZE( log_point ) ) )
	440	WHERE ( log_point%counts /= 0 )
	441	sum = log_point%sum
	442	ELSEWHERE
	443	sum = -1.0_dp
	444	ENDWHERE
[1318]	445
	446	!
[4539]	447	!-- Get total time in order to calculate CPU-time per gridpoint and timestep.
	448	!-- Time for initialization (2) and spinup (41) are not included here!
	449	IF ( nr_timesteps_this_run /= 0 ) THEN
	450	average_cputime = log_point_s(10)%sum / REAL( ngp_3d(0), KIND=dp ) / &
	451	REAL( nr_timesteps_this_run, KIND=dp ) * 1E6_dp ! in micro-sec
	452	ELSE
	453	average_cputime = -1.0_dp
	454	ENDIF
	455
	456	!
	457	!-- Write cpu-times sorted by size
	458	CALL check_open( 18 )
	459	#if defined( __parallel )
	460	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, &
	461	pdims(1), pdims(2), threads_per_task, nx+1, ny+1, nz, &
	462	nr_timesteps_this_run, average_cputime
	463
	464	WRITE ( 18, 110 )
	465	#else
	466	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, 1, 1, &
	467	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	468	average_cputime
	469
	470	WRITE ( 18, 110 )
	471	#endif
	472	DO
	473	ii = MAXLOC( sum )
	474	i = ii(1)
	475	IF ( sum(i) /= -1.0_dp ) THEN
	476	WRITE ( 18, 102 ) log_point(i)%place, log_point(i)%sum, &
	477	log_point(i)%sum / log_point(1)%sum * 100.0_dp, &
	478	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
	479	sum(i) = -1.0_dp
	480	ELSE
	481	EXIT
	482	ENDIF
	483	ENDDO
	484	ENDIF
	485
	486	!
	487	!-- Write CPU-times for special measurements.
[1318]	488	IF ( myid == 0 ) THEN
	489	!
	490	!-- Re-store sums
[4549]	491	ALLOCATE( sum_s( SIZE( log_point_s ) ) )
[1318]	492	WHERE ( log_point_s%counts /= 0 )
[4549]	493	sum_s = log_point_s%sum
[1318]	494	ELSEWHERE
[4549]	495	sum_s = -1.0_dp
[1318]	496	ENDWHERE
	497
	498	!
	499	!-- Write cpu-times sorted by size
	500	WRITE ( 18, 101 )
	501	DO
[4549]	502	ii = MAXLOC( sum_s )
[1318]	503	i = ii(1)
[4549]	504	IF ( sum_s(i) /= -1.0_dp ) THEN
[4015]	505	WRITE ( 18, 102 ) log_point_s(i)%place, log_point_s(i)%sum, &
	506	log_point_s(i)%sum / log_point(1)%sum * 100.0_dp, &
[4549]	507	log_point_s(i)%counts, pe_min_s(i), pe_max_s(i), pe_rms_s(i)
	508	sum_s(i) = -1.0_dp
[1318]	509	ELSE
	510	EXIT
	511	ENDIF
	512	ENDDO
	513
	514	!
	515	!-- Output of handling of MPI operations
	516	IF ( collective_wait ) THEN
	517	WRITE ( 18, 103 )
	518	ELSE
	519	WRITE ( 18, 104 )
	520	ENDIF
	521	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
	522	IF ( synchronous_exchange ) THEN
	523	WRITE ( 18, 105 )
	524	ELSE
	525	WRITE ( 18, 106 )
	526	ENDIF
	527	!
[4536]	528	!-- Output of restart data transfer speed
	529	IF ( write_binary .AND. restart_data_format_output(1:3) == 'mpi' ) THEN
	530	WRITE ( 18, 107 ) restart_file_size, restart_file_size / log_point(22)%sum
	531	ENDIF
	532	!
	533	!-- Empty lines in order to create a gap to the results from the next restart run
	534	WRITE ( 18, 108 )
[1318]	535
	536	!
	537	!-- Unit 18 is not needed anymore
	538	CALL close_file( 18 )
	539
	540	ENDIF
	541
[3885]	542	CALL location_message( 'calculating cpu statistics', 'finished' )
[1318]	543
[3885]	544
[4015]	545	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
	546	&') tasks *',I5,' threads):'// &
	547	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
	548	'nr of timesteps: ',22X,I6/ &
[1318]	549	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
	550
	551	101 FORMAT (/'special measures:'/ &
[4015]	552	&'-----------------------------------------------------------', &
[3483]	553	&'---------------------')
[1318]	554
[4665]	555	102 FORMAT (A25,2X,F10.3,2X,F7.2,1X,I7,2(1X,F10.3),1X,F6.2)
[1318]	556	103 FORMAT (/'Barriers are set in front of collective operations')
	557	104 FORMAT (/'No barriers are set in front of collective operations')
	558	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
	559	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
[4536]	560	107 FORMAT (/'Restart file size: ',F12.1,' MByte'/ &
	561	&'I/O transfer speed: ',F12.1,' MByte / sec')
	562	108 FORMAT (//)
[4015]	563	110 FORMAT ('------------------------------------------------------------', &
	564	&'----------'// &
	565	&'place: mean counts ', &
	566	&' min max rms'/ &
	567	&' sec. % ', &
	568	&'sec. sec. sec.'/ &
	569	&'-----------------------------------------------------------', &
[3483]	570	&'---------------------')
[1318]	571	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
	572
	573	END SUBROUTINE cpu_statistics
	574
	575	END MODULE cpulog

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