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source: palm/trunk/SOURCE/cpulog_mod.f90 @ 4397

Last change on this file since 4397 was 4378, checked in by Giersch, 5 years ago
Format of rms output in cpu measurements changed to allow values >= 100
Property svn:keywords set to `Id`
File size: 21.0 KB

Rev	Line
[1850]	1	!> @file cpulog_mod.f90
[2000]	2	!------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[4360]	17	! Copyright 1997-2020 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[254]	20	! Current revisions:
[1]	21	! -----------------
[1403]	22	!
[3049]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: cpulog_mod.f90 4378 2020-01-16 13:22:48Z scharf $
[4378]	27	! Format of rms output changed to allow values >= 100
	28	!
	29	! 4360 2020-01-07 11:25:50Z suehring
[4182]	30	! Corrected "Former revisions" section
	31	!
	32	! 4015 2019-06-05 13:25:35Z raasch
[4015]	33	! all reals changed to double precision in order to work with 32-bit working precision,
	34	! otherwise calculated time intervals would mostly give zero
	35	!
	36	! 3885 2019-04-11 11:29:34Z kanani
[3885]	37	! Changes related to global restructuring of location messages and introduction
	38	! of additional debug messages
	39	!
	40	! 3655 2019-01-07 16:51:22Z knoop
[3483]	41	! output format limited to a maximum line length of 80
[2716]	42	!
[4182]	43	! Revision 1.1 1997/07/24 11:12:29 raasch
	44	! Initial revision
	45	!
	46	!
[1]	47	! Description:
	48	! ------------
[1682]	49	!> CPU-time measurements for any program part whatever. Results of the
	50	!> measurements are output at the end of the run in local file CPU_MEASURES.
	51	!>
	52	!> To measure the CPU-time (better to say the wallclock time) of a specific code
	53	!> segment, two calls of cpu_log have to be used as brackets in front and at the
	54	!> end of the segment:
	55	!>
	56	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
	57	!> ... code segment ...
	58	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
	59	!>
	60	!> Parts of the code segment can be excluded from the measurement by additional
	61	!> call of cpu_log:
	62	!>
	63	!> ... first segment to be measured
	64	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
	65	!> ... oart of segment to be excluded from measurement
	66	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
	67	!> ... second segment to be mesasured
	68	!>
	69	!> n is an INTEGER within the interval [1,100] defining the id of the specific
	70	!> code segment, 'any identifier' is a string describing the code segment to be
	71	!> measured. It can be freely chosen and results will appear under this name in
	72	!> file CPU_MEASURES. ids can only be used once. If you like to do a
	73	!> measurement of a new part of the code, please look for an id which is unused
	74	!> ao far.
	75	!>
[2932]	76	!> runtime_parameters-parameter cpu_log_barrierwait can be used to set an MPI
	77	!> barrier at the beginning of the measurement (modus 'start' or 'continue'),
	78	!> to avoid that idle times (due to MPI calls in the code segment, which are
[1682]	79	!> waiting for other processes to be finished) affect the measurements.
	80	!> If barriers shall not be used at all, a fourth, optional parameter has to be
	81	!> given:
	82	!>
	83	!> CALL cpu_log( ..., ..., 'start', cpu_log_nowait )
	84	!>
	85	!> Variable log_point should be used for non-overlapping code segments, and they
	86	!> should sum up to the total cpu-time required by the complete run.
	87	!> Variable log_point_s can be used for any other special (s) measurements.
[3]	88	!------------------------------------------------------------------------------!
[1682]	89	MODULE cpulog
	90
[1]	91
[4015]	92	USE control_parameters, &
	93	ONLY: message_string, nr_timesteps_this_run, run_description_header, synchronous_exchange
[1320]	94
[4015]	95	USE indices, &
[2266]	96	ONLY: ngp_3d, nx, ny, nz
[1320]	97
	98	USE kinds
	99
[1]	100	USE pegrid
	101
	102	IMPLICIT NONE
	103
[1318]	104	PRIVATE
[4015]	105	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, initial_wallclock_time, &
	106	log_point, log_point_s
[1]	107
[1318]	108	INTERFACE cpu_log
	109	MODULE PROCEDURE cpu_log
	110	END INTERFACE cpu_log
	111
	112	INTERFACE cpu_statistics
	113	MODULE PROCEDURE cpu_statistics
	114	END INTERFACE cpu_statistics
	115
[1682]	116	INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !<
	117	INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !<
	118	INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !<
	119	INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !<
[1318]	120
[1682]	121	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
	122	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
[1318]	123
[4015]	124	REAL(dp) :: initial_wallclock_time !<
[1318]	125
	126	TYPE logpoint
[4015]	127	REAL(dp) :: isum !<
	128	REAL(dp) :: ivect !<
	129	REAL(dp) :: mean !<
	130	REAL(dp) :: mtime !<
	131	REAL(dp) :: mtimevec !<
	132	REAL(dp) :: sum !<
	133	REAL(dp) :: vector !<
[1682]	134	INTEGER(iwp) :: counts !<
[1931]	135	CHARACTER (LEN=25) :: place !<
[1318]	136	END TYPE logpoint
	137
[4015]	138	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
	139	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
	140	TYPE(logpoint), DIMENSION(100) :: log_point_s = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
	141	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
[1318]	142
	143	SAVE
	144
	145	CONTAINS
	146
[1682]	147	!------------------------------------------------------------------------------!
	148	! Description:
	149	! ------------
	150	!> @todo Missing subroutine description.
	151	!------------------------------------------------------------------------------!
[1318]	152	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
	153
	154	IMPLICIT NONE
	155
[1682]	156	CHARACTER (LEN=*) :: modus !<
	157	CHARACTER (LEN=*) :: place !<
[1320]	158
[1682]	159	LOGICAL :: wait_allowed !<
	160	LOGICAL, OPTIONAL :: barrierwait !<
	161	LOGICAL, SAVE :: first = .TRUE. !<
[1320]	162
[4015]	163	REAL(dp) :: mtime = 0.0_dp !<
	164	REAL(dp) :: mtimevec = 0.0_dp !<
[1682]	165	TYPE(logpoint) :: log_event !<
[1318]	166
[1682]	167	INTEGER(idp) :: count !<
	168	INTEGER(idp) :: count_rate !<
[1]	169
	170
	171	!
[1318]	172	!-- Initialize and check, respectively, point of measurement
	173	IF ( log_event%place == ' ' ) THEN
	174	log_event%place = place
	175	ELSEIF ( log_event%place /= place ) THEN
[4015]	176	WRITE( message_string, * ) 'wrong argument expected: ', &
	177	TRIM(log_event%place), ' given: ', TRIM( place )
[1318]	178	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
	179	ENDIF
[1]	180
	181	!
[1318]	182	!-- Determine, if barriers are allowed to set
	183	IF ( PRESENT( barrierwait ) ) THEN
	184	wait_allowed = barrierwait
	185	ELSE
	186	wait_allowed = .TRUE.
	187	ENDIF
	188
	189	!
	190	!-- MPI barrier, if requested, in order to avoid measuring wait times
	191	!-- caused by MPI routines waiting for other MPI routines of other
	192	!-- PEs that have not yet finished
	193	#if defined( __parallel )
[4015]	194	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
[1318]	195	( modus == 'start' .OR. modus == 'continue' ) ) THEN
	196	CALL MPI_BARRIER( comm2d, ierr )
	197	ENDIF
	198	#endif
	199
	200	!
	201	!-- Take current time
	202	CALL SYSTEM_CLOCK( count, count_rate )
[4015]	203	mtime = REAL( count, KIND=dp ) / REAL( count_rate, KIND=dp )
[1]	204
	205	!
[1318]	206	!-- Start, stop or pause measurement
	207	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
	208	log_event%mtime = mtime
	209	log_event%mtimevec = mtimevec
	210	ELSEIF ( modus == 'pause' ) THEN
	211	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
[4015]	212	WRITE( message_string, * ) 'negative time interval occured', &
	213	'&PE',myid,' L=PAUSE "',TRIM(log_event%place), &
	214	'" new=', mtime,' last=',log_event%mtime
[1318]	215	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
	216	first = .FALSE.
	217	ENDIF
	218	log_event%isum = log_event%isum + mtime - log_event%mtime
	219	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
	220	ELSEIF ( modus == 'stop' ) THEN
[4015]	221	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. first ) THEN
	222	WRITE( message_string, * ) 'negative time interval occured', &
	223	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
	224	mtime,' last=',log_event%mtime,' isum=',log_event%isum
[1318]	225	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
	226	first = .FALSE.
	227	ENDIF
	228	log_event%mtime = mtime - log_event%mtime + log_event%isum
	229	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
	230	log_event%sum = log_event%sum + log_event%mtime
	231	IF ( log_event%sum < 0.0 .AND. first ) THEN
[4015]	232	WRITE( message_string, * ) 'negative time interval occured', &
	233	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
	234	log_event%sum,' mtime=',log_event%mtime
[1318]	235	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
	236	first = .FALSE.
	237	ENDIF
	238	log_event%vector = log_event%vector + log_event%mtimevec
	239	log_event%counts = log_event%counts + 1
[4015]	240	log_event%isum = 0.0_dp
	241	log_event%ivect = 0.0_dp
[1318]	242	ELSE
[4015]	243	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
[1318]	244	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
[1]	245	ENDIF
[1318]	246
	247	END SUBROUTINE cpu_log
	248
	249
	250	!------------------------------------------------------------------------------!
	251	! Description:
	252	! ------------
[1682]	253	!> Analysis and output of the cpu-times measured. All PE results are collected
	254	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
	255	!> statistics. The output is sorted according to the amount of cpu-time consumed
	256	!> and output on PE0.
[1318]	257	!------------------------------------------------------------------------------!
[1682]	258
	259	SUBROUTINE cpu_statistics
[1318]	260
	261	IMPLICIT NONE
	262
[1682]	263	INTEGER(iwp) :: i !<
	264	INTEGER(iwp) :: ii(1) !<
	265	INTEGER(iwp) :: iii !<
	266	INTEGER(iwp) :: sender !<
[4015]	267	REAL(dp) :: average_cputime !<
	268	REAL(dp), SAVE :: norm = 1.0_dp !<
	269	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max !<
	270	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min !<
	271	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
	272	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp !<
	273	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum !<
	274	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
[1318]	275
	276
[3885]	277	CALL location_message( 'calculating cpu statistics', 'start' )
[1402]	278
[1318]	279	!
	280	!-- Compute cpu-times in seconds
	281	log_point%mtime = log_point%mtime / norm
	282	log_point%sum = log_point%sum / norm
	283	log_point%vector = log_point%vector / norm
	284	WHERE ( log_point%counts /= 0 )
	285	log_point%mean = log_point%sum / log_point%counts
	286	END WHERE
	287
	288
	289	!
	290	!-- Collect cpu-times from all PEs and calculate statistics
	291	IF ( myid == 0 ) THEN
	292	!
	293	!-- Allocate and initialize temporary arrays needed for statistics
[4015]	294	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
	295	pe_rms( SIZE( log_point ) ), pe_tmp( SIZE( log_point ) ), &
[1318]	296	pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
	297	pe_min = log_point%sum
	298	pe_max = log_point%sum ! need to be set in case of 1 PE
[4015]	299	pe_rms = 0.0_dp
	300	pe_tmp = 0.0_dp
[1318]	301
	302	#if defined( __parallel )
	303	!
	304	!-- Receive data from all PEs
	305	DO i = 1, numprocs-1
[4015]	306	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, i, i, comm2d, &
	307	status, ierr )
[1318]	308	sender = status(MPI_SOURCE)
[3229]	309	pe_log_points(:,sender) = pe_tmp
[1318]	310	ENDDO
	311	pe_log_points(:,0) = log_point%sum ! Results from PE0
	312	!
	313	!-- Calculate mean of all PEs, store it on log_point%sum
	314	!-- and find minimum and maximum
	315	DO iii = 1, SIZE( log_point )
	316	DO i = 1, numprocs-1
	317	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
	318	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	319	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	320	ENDDO
	321	log_point(iii)%sum = log_point(iii)%sum / numprocs
	322	!
	323	!-- Calculate rms
	324	DO i = 0, numprocs-1
[4015]	325	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point(iii)%sum )**2
[1318]	326	ENDDO
	327	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	328	ENDDO
	329	ELSE
	330	!
	331	!-- Send data to PE0 (pe_max is used as temporary storage to send
	332	!-- the data in order to avoid sending the data type log)
	333	ALLOCATE( pe_max( SIZE( log_point ) ) )
	334	pe_max = log_point%sum
[4015]	335	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, myid, comm2d, ierr )
[1318]	336	#endif
	337
[1]	338	ENDIF
[1318]	339
	340	!
	341	!-- Write cpu-times
	342	IF ( myid == 0 ) THEN
	343	!
	344	!-- Re-store sums
	345	ALLOCATE( sum( SIZE( log_point ) ) )
	346	WHERE ( log_point%counts /= 0 )
	347	sum = log_point%sum
	348	ELSEWHERE
[4015]	349	sum = -1.0_dp
[1318]	350	ENDWHERE
	351
	352	!
[2266]	353	!-- Get total time in order to calculate CPU-time per gridpoint and
	354	!-- timestep
[1318]	355	IF ( nr_timesteps_this_run /= 0 ) THEN
[4015]	356	average_cputime = log_point(1)%sum / REAL( ngp_3d(0), KIND=dp ) / &
	357	REAL( nr_timesteps_this_run, KIND=dp ) * 1E6_dp ! in micro-sec
[1318]	358	ELSE
[4015]	359	average_cputime = -1.0_dp
[1318]	360	ENDIF
	361
	362	!
	363	!-- Write cpu-times sorted by size
	364	CALL check_open( 18 )
	365	#if defined( __parallel )
[4015]	366	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, &
	367	pdims(1), pdims(2), threads_per_task, nx+1, ny+1, nz, &
[2266]	368	nr_timesteps_this_run, average_cputime
[1318]	369
	370	WRITE ( 18, 110 )
	371	#else
[4015]	372	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, 1, 1, &
	373	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	374	average_cputime
[1318]	375
	376	WRITE ( 18, 110 )
	377	#endif
	378	DO
	379	ii = MAXLOC( sum )
	380	i = ii(1)
[4015]	381	IF ( sum(i) /= -1.0_dp ) THEN
	382	WRITE ( 18, 102 ) log_point(i)%place, log_point(i)%sum, &
	383	log_point(i)%sum / log_point(1)%sum * 100.0_dp, &
	384	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
	385	sum(i) = -1.0_dp
[1318]	386	ELSE
	387	EXIT
	388	ENDIF
	389	ENDDO
[1]	390	ENDIF
	391
	392
[1318]	393	!
	394	!-- The same procedure again for the individual measurements.
	395	!
	396	!-- Compute cpu-times in seconds
	397	log_point_s%mtime = log_point_s%mtime / norm
	398	log_point_s%sum = log_point_s%sum / norm
	399	log_point_s%vector = log_point_s%vector / norm
	400	WHERE ( log_point_s%counts /= 0 )
	401	log_point_s%mean = log_point_s%sum / log_point_s%counts
	402	END WHERE
	403
	404	!
	405	!-- Collect cpu-times from all PEs and calculate statistics
	406	#if defined( __parallel )
	407	!
	408	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
	409	!-- while still busy with receiving log_point-data (see above)
	410	CALL MPI_BARRIER( comm2d, ierr )
	411	#endif
	412	IF ( myid == 0 ) THEN
	413	!
	414	!-- Initialize temporary arrays needed for statistics
	415	pe_min = log_point_s%sum
	416	pe_max = log_point_s%sum ! need to be set in case of 1 PE
[4015]	417	pe_rms = 0.0_dp
[1318]	418
	419	#if defined( __parallel )
	420	!
	421	!-- Receive data from all PEs
	422	DO i = 1, numprocs-1
[4015]	423	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, MPI_ANY_SOURCE, &
	424	MPI_ANY_TAG, comm2d, status, ierr )
[1318]	425	sender = status(MPI_SOURCE)
[3229]	426	pe_log_points(:,sender) = pe_tmp
[1318]	427	ENDDO
	428	pe_log_points(:,0) = log_point_s%sum ! Results from PE0
	429	!
	430	!-- Calculate mean of all PEs, store it on log_point_s%sum
	431	!-- and find minimum and maximum
	432	DO iii = 1, SIZE( log_point )
	433	DO i = 1, numprocs-1
[4015]	434	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points(iii,i)
[1318]	435	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	436	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	437	ENDDO
	438	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
	439	!
	440	!-- Calculate rms
	441	DO i = 0, numprocs-1
[4015]	442	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point_s(iii)%sum )**2
[1318]	443	ENDDO
	444	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	445	ENDDO
	446	ELSE
	447	!
	448	!-- Send data to PE0 (pe_max is used as temporary storage to send
	449	!-- the data in order to avoid sending the data type log)
	450	pe_max = log_point_s%sum
[4015]	451	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, 0, comm2d, ierr )
[1318]	452	#endif
	453
	454	ENDIF
	455
	456	!
	457	!-- Write cpu-times
	458	IF ( myid == 0 ) THEN
	459	!
	460	!-- Re-store sums
	461	WHERE ( log_point_s%counts /= 0 )
	462	sum = log_point_s%sum
	463	ELSEWHERE
[4015]	464	sum = -1.0_dp
[1318]	465	ENDWHERE
	466
	467	!
	468	!-- Write cpu-times sorted by size
	469	WRITE ( 18, 101 )
	470	DO
	471	ii = MAXLOC( sum )
	472	i = ii(1)
[4015]	473	IF ( sum(i) /= -1.0_dp ) THEN
	474	WRITE ( 18, 102 ) log_point_s(i)%place, log_point_s(i)%sum, &
	475	log_point_s(i)%sum / log_point(1)%sum * 100.0_dp, &
	476	log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
	477	sum(i) = -1.0_dp
[1318]	478	ELSE
	479	EXIT
	480	ENDIF
	481	ENDDO
	482
	483	!
	484	!-- Output of handling of MPI operations
	485	IF ( collective_wait ) THEN
	486	WRITE ( 18, 103 )
	487	ELSE
	488	WRITE ( 18, 104 )
	489	ENDIF
	490	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
	491	IF ( synchronous_exchange ) THEN
	492	WRITE ( 18, 105 )
	493	ELSE
	494	WRITE ( 18, 106 )
	495	ENDIF
	496
	497	!
	498	!-- Empty lines in order to create a gap to the results of the model
	499	!-- continuation runs
	500	WRITE ( 18, 107 )
	501
	502	!
	503	!-- Unit 18 is not needed anymore
	504	CALL close_file( 18 )
	505
	506	ENDIF
	507
[3885]	508	CALL location_message( 'calculating cpu statistics', 'finished' )
[1318]	509
[3885]	510
[4015]	511	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
	512	&') tasks *',I5,' threads):'// &
	513	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
	514	'nr of timesteps: ',22X,I6/ &
[1318]	515	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
	516
	517	101 FORMAT (/'special measures:'/ &
[4015]	518	&'-----------------------------------------------------------', &
[3483]	519	&'---------------------')
[1318]	520
[4378]	521	102 FORMAT (A25,2X,F9.3,2X,F7.2,1X,I7,2(1X,F9.3),1X,F6.2)
[1318]	522	103 FORMAT (/'Barriers are set in front of collective operations')
	523	104 FORMAT (/'No barriers are set in front of collective operations')
	524	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
	525	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
	526	107 FORMAT (//)
[4015]	527	110 FORMAT ('------------------------------------------------------------', &
	528	&'----------'// &
	529	&'place: mean counts ', &
	530	&' min max rms'/ &
	531	&' sec. % ', &
	532	&'sec. sec. sec.'/ &
	533	&'-----------------------------------------------------------', &
[3483]	534	&'---------------------')
[1318]	535	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
	536
	537	END SUBROUTINE cpu_statistics
	538
	539	END MODULE cpulog

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