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[1850]	1	!> @file cpulog_mod.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1818]	16	! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[1403]	21	!
[1851]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: cpulog_mod.f90 1851 2016-04-08 13:32:50Z raasch $
	26	!
[1851]	27	! 1850 2016-04-08 13:29:27Z maronga
	28	! Module renamed
	29	!
	30	!
[1809]	31	! 1808 2016-04-05 19:44:00Z raasch
	32	! cpu measurements are done with standard FORTRAN routine on every machine
	33	!
[1683]	34	! 1682 2015-10-07 23:56:08Z knoop
	35	! Code annotations made doxygen readable
	36	!
[1403]	37	! 1402 2014-05-09 14:25:13Z raasch
	38	! location messages added
	39	!
[1370]	40	! 1369 2014-04-24 05:57:38Z raasch
	41	! routine description added
	42	!
[1354]	43	! 1353 2014-04-08 15:21:23Z heinze
	44	! REAL constants provided with KIND-attribute
	45	!
[1323]	46	! 1322 2014-03-20 16:38:49Z raasch
	47	! REAL functions provided with KIND-attribute
	48	!
[1321]	49	! 1320 2014-03-20 08:40:49Z raasch
[1320]	50	! ONLY-attribute added to USE-statements,
	51	! kind-parameters added to all INTEGER and REAL declaration statements,
	52	! kinds are defined in new module kinds,
	53	! revision history before 2012 removed,
	54	! comment fields (!:) to be used for variable explanations added to
	55	! all variable declaration statements
[1321]	56	!
[1319]	57	! 1318 2014-03-17 13:35:16Z raasch
	58	! former files/routines cpu_log and cpu_statistics combined to one module,
	59	! which also includes the former data module cpulog from the modules-file
	60	!
[1037]	61	! 1036 2012-10-22 13:43:42Z raasch
	62	! code put under GPL (PALM 3.9)
	63	!
[1]	64	! Revision 1.1 1997/07/24 11:12:29 raasch
	65	! Initial revision
	66	!
	67	!
	68	! Description:
	69	! ------------
[1682]	70	!> CPU-time measurements for any program part whatever. Results of the
	71	!> measurements are output at the end of the run in local file CPU_MEASURES.
	72	!>
	73	!> To measure the CPU-time (better to say the wallclock time) of a specific code
	74	!> segment, two calls of cpu_log have to be used as brackets in front and at the
	75	!> end of the segment:
	76	!>
	77	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
	78	!> ... code segment ...
	79	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
	80	!>
	81	!> Parts of the code segment can be excluded from the measurement by additional
	82	!> call of cpu_log:
	83	!>
	84	!> ... first segment to be measured
	85	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
	86	!> ... oart of segment to be excluded from measurement
	87	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
	88	!> ... second segment to be mesasured
	89	!>
	90	!> n is an INTEGER within the interval [1,100] defining the id of the specific
	91	!> code segment, 'any identifier' is a string describing the code segment to be
	92	!> measured. It can be freely chosen and results will appear under this name in
	93	!> file CPU_MEASURES. ids can only be used once. If you like to do a
	94	!> measurement of a new part of the code, please look for an id which is unused
	95	!> ao far.
	96	!>
	97	!> d3par-parameter cpu_log_barrierwait can be used to set an MPI barrier at the
	98	!> beginning of the measurement (modus 'start' or 'continue'), to avoid that
	99	!> idle times (due to MPI calls in the code segment, which are
	100	!> waiting for other processes to be finished) affect the measurements.
	101	!> If barriers shall not be used at all, a fourth, optional parameter has to be
	102	!> given:
	103	!>
	104	!> CALL cpu_log( ..., ..., 'start', cpu_log_nowait )
	105	!>
	106	!> Variable log_point should be used for non-overlapping code segments, and they
	107	!> should sum up to the total cpu-time required by the complete run.
	108	!> Variable log_point_s can be used for any other special (s) measurements.
[3]	109	!------------------------------------------------------------------------------!
[1682]	110	MODULE cpulog
	111
[1]	112
[1320]	113	USE control_parameters, &
	114	ONLY: message_string, nr_timesteps_this_run, run_description_header, &
	115	synchronous_exchange
	116
	117	USE indices, &
	118	ONLY: nx, ny, nz
	119
	120	USE kinds
	121
[1]	122	USE pegrid
	123
	124	IMPLICIT NONE
	125
[1318]	126	PRIVATE
[1320]	127	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, &
[1318]	128	initial_wallclock_time, log_point, log_point_s
[1]	129
[1318]	130	INTERFACE cpu_log
	131	MODULE PROCEDURE cpu_log
	132	END INTERFACE cpu_log
	133
	134	INTERFACE cpu_statistics
	135	MODULE PROCEDURE cpu_statistics
	136	END INTERFACE cpu_statistics
	137
[1682]	138	INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !<
	139	INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !<
	140	INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !<
	141	INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !<
[1318]	142
[1682]	143	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
	144	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
[1318]	145
[1682]	146	REAL(wp) :: initial_wallclock_time !<
[1318]	147
	148	TYPE logpoint
[1682]	149	REAL(wp) :: isum !<
	150	REAL(wp) :: ivect !<
	151	REAL(wp) :: mean !<
	152	REAL(wp) :: mtime !<
	153	REAL(wp) :: mtimevec !<
	154	REAL(wp) :: sum !<
	155	REAL(wp) :: vector !<
	156	INTEGER(iwp) :: counts !<
	157	CHARACTER (LEN=20) :: place !<
[1318]	158	END TYPE logpoint
	159
[1353]	160	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_wp, 0.0_wp, &
	161	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	162	0, ' ' ), &
	163	log_point_s = logpoint( 0.0_wp, 0.0_wp, &
	164	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	165	0, ' ' )
[1318]	166
	167	SAVE
	168
	169	CONTAINS
	170
[1682]	171	!------------------------------------------------------------------------------!
	172	! Description:
	173	! ------------
	174	!> @todo Missing subroutine description.
	175	!------------------------------------------------------------------------------!
[1318]	176	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
	177
	178	IMPLICIT NONE
	179
[1682]	180	CHARACTER (LEN=*) :: modus !<
	181	CHARACTER (LEN=*) :: place !<
[1320]	182
[1682]	183	LOGICAL :: wait_allowed !<
	184	LOGICAL, OPTIONAL :: barrierwait !<
	185	LOGICAL, SAVE :: first = .TRUE. !<
[1320]	186
[1682]	187	REAL(wp) :: mtime = 0.0_wp !<
	188	REAL(wp) :: mtimevec = 0.0_wp !<
	189	TYPE(logpoint) :: log_event !<
[1318]	190
[1682]	191	INTEGER(idp) :: count !<
	192	INTEGER(idp) :: count_rate !<
[1]	193
	194
	195	!
[1318]	196	!-- Initialize and check, respectively, point of measurement
	197	IF ( log_event%place == ' ' ) THEN
	198	log_event%place = place
	199	ELSEIF ( log_event%place /= place ) THEN
[1320]	200	WRITE( message_string, * ) 'wrong argument & expected: ', &
[1318]	201	TRIM(log_event%place), ' given: ', TRIM( place )
	202	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
	203	ENDIF
[1]	204
	205	!
[1318]	206	!-- Determine, if barriers are allowed to set
	207	IF ( PRESENT( barrierwait ) ) THEN
	208	wait_allowed = barrierwait
	209	ELSE
	210	wait_allowed = .TRUE.
	211	ENDIF
	212
	213	!
	214	!-- MPI barrier, if requested, in order to avoid measuring wait times
	215	!-- caused by MPI routines waiting for other MPI routines of other
	216	!-- PEs that have not yet finished
	217	#if defined( __parallel )
[1320]	218	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
[1318]	219	( modus == 'start' .OR. modus == 'continue' ) ) THEN
	220	CALL MPI_BARRIER( comm2d, ierr )
	221	ENDIF
	222	#endif
	223
	224	!
	225	!-- Take current time
	226	CALL SYSTEM_CLOCK( count, count_rate )
[1322]	227	mtime = REAL( count, KIND=wp ) / REAL( count_rate, KIND=wp )
[1]	228
	229	!
[1318]	230	!-- Start, stop or pause measurement
	231	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
	232	log_event%mtime = mtime
	233	log_event%mtimevec = mtimevec
	234	ELSEIF ( modus == 'pause' ) THEN
	235	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
[1320]	236	WRITE( message_string, * ) 'negative time interval occured', &
	237	' &PE',myid,' L=PAUSE "',TRIM(log_event%place), &
	238	'" new=', mtime,' last=',log_event%mtime
[1318]	239	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
	240	first = .FALSE.
	241	ENDIF
	242	log_event%isum = log_event%isum + mtime - log_event%mtime
	243	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
	244	ELSEIF ( modus == 'stop' ) THEN
[1320]	245	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. &
[1318]	246	first ) THEN
[1320]	247	WRITE( message_string, * ) 'negative time interval occured', &
[1318]	248	' &PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
	249	mtime,' last=',log_event%mtime,' isum=',log_event%isum
	250	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
	251	first = .FALSE.
	252	ENDIF
	253	log_event%mtime = mtime - log_event%mtime + log_event%isum
	254	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
	255	log_event%sum = log_event%sum + log_event%mtime
	256	IF ( log_event%sum < 0.0 .AND. first ) THEN
[1320]	257	WRITE( message_string, * ) 'negative time interval occured', &
[1318]	258	' &PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
	259	log_event%sum,' mtime=',log_event%mtime
	260	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
	261	first = .FALSE.
	262	ENDIF
	263	log_event%vector = log_event%vector + log_event%mtimevec
	264	log_event%counts = log_event%counts + 1
[1353]	265	log_event%isum = 0.0_wp
	266	log_event%ivect = 0.0_wp
[1318]	267	ELSE
	268	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
	269	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
[1]	270	ENDIF
[1318]	271
	272	END SUBROUTINE cpu_log
	273
	274
	275	!------------------------------------------------------------------------------!
	276	! Description:
	277	! ------------
[1682]	278	!> Analysis and output of the cpu-times measured. All PE results are collected
	279	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
	280	!> statistics. The output is sorted according to the amount of cpu-time consumed
	281	!> and output on PE0.
[1318]	282	!------------------------------------------------------------------------------!
[1682]	283
	284	SUBROUTINE cpu_statistics
[1318]	285
	286	IMPLICIT NONE
	287
[1682]	288	INTEGER(iwp) :: i !<
	289	INTEGER(iwp) :: ii(1) !<
	290	INTEGER(iwp) :: iii !<
	291	INTEGER(iwp) :: sender !<
	292	REAL(wp) :: average_cputime !<
	293	REAL(wp), SAVE :: norm = 1.0_wp !<
	294	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_max !<
	295	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_min !<
	296	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
	297	REAL(wp), DIMENSION(:), ALLOCATABLE :: sum !<
	298	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
[1318]	299
	300
[1402]	301	CALL location_message( 'calculating cpu statistics', .FALSE. )
	302
[1318]	303	!
	304	!-- Compute cpu-times in seconds
	305	log_point%mtime = log_point%mtime / norm
	306	log_point%sum = log_point%sum / norm
	307	log_point%vector = log_point%vector / norm
	308	WHERE ( log_point%counts /= 0 )
	309	log_point%mean = log_point%sum / log_point%counts
	310	END WHERE
	311
	312
	313	!
	314	!-- Collect cpu-times from all PEs and calculate statistics
	315	IF ( myid == 0 ) THEN
	316	!
	317	!-- Allocate and initialize temporary arrays needed for statistics
[1320]	318	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
	319	pe_rms( SIZE( log_point ) ), &
[1318]	320	pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
	321	pe_min = log_point%sum
	322	pe_max = log_point%sum ! need to be set in case of 1 PE
[1353]	323	pe_rms = 0.0_wp
[1318]	324
	325	#if defined( __parallel )
	326	!
	327	!-- Receive data from all PEs
	328	DO i = 1, numprocs-1
[1320]	329	CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
[1318]	330	i, i, comm2d, status, ierr )
	331	sender = status(MPI_SOURCE)
	332	pe_log_points(:,sender) = pe_max
	333	ENDDO
	334	pe_log_points(:,0) = log_point%sum ! Results from PE0
	335	!
	336	!-- Calculate mean of all PEs, store it on log_point%sum
	337	!-- and find minimum and maximum
	338	DO iii = 1, SIZE( log_point )
	339	DO i = 1, numprocs-1
	340	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
	341	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	342	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	343	ENDDO
	344	log_point(iii)%sum = log_point(iii)%sum / numprocs
	345	!
	346	!-- Calculate rms
	347	DO i = 0, numprocs-1
[1320]	348	pe_rms(iii) = pe_rms(iii) + ( &
	349	pe_log_points(iii,i) - log_point(iii)%sum &
[1318]	350	)**2
	351	ENDDO
	352	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	353	ENDDO
	354	ELSE
	355	!
	356	!-- Send data to PE0 (pe_max is used as temporary storage to send
	357	!-- the data in order to avoid sending the data type log)
	358	ALLOCATE( pe_max( SIZE( log_point ) ) )
	359	pe_max = log_point%sum
	360	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, myid, comm2d, &
	361	ierr )
	362	#endif
	363
[1]	364	ENDIF
[1318]	365
	366	!
	367	!-- Write cpu-times
	368	IF ( myid == 0 ) THEN
	369	!
	370	!-- Re-store sums
	371	ALLOCATE( sum( SIZE( log_point ) ) )
	372	WHERE ( log_point%counts /= 0 )
	373	sum = log_point%sum
	374	ELSEWHERE
[1353]	375	sum = -1.0_wp
[1318]	376	ENDWHERE
	377
	378	!
	379	!-- Get total time in order to calculate CPU-time per gridpoint and timestep
	380	IF ( nr_timesteps_this_run /= 0 ) THEN
[1322]	381	average_cputime = log_point(1)%sum / REAL( (nx+1) * (ny+1) * nz, KIND=wp ) / &
	382	REAL( nr_timesteps_this_run, KIND=wp ) * 1E6_wp ! in micro-sec
[1318]	383	ELSE
[1353]	384	average_cputime = -1.0_wp
[1318]	385	ENDIF
	386
	387	!
	388	!-- Write cpu-times sorted by size
	389	CALL check_open( 18 )
	390	#if defined( __parallel )
	391	WRITE ( 18, 100 ) TRIM( run_description_header ), &
	392	numprocs * threads_per_task, pdims(1), pdims(2), &
	393	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	394	average_cputime
	395
	396	IF ( num_acc_per_node /= 0 ) WRITE ( 18, 108 ) num_acc_per_node
	397	WRITE ( 18, 110 )
	398	#else
	399	WRITE ( 18, 100 ) TRIM( run_description_header ), &
	400	numprocs * threads_per_task, 1, 1, &
	401	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	402	average_cputime
	403
	404	IF ( num_acc_per_node /= 0 ) WRITE ( 18, 109 ) num_acc_per_node
	405	WRITE ( 18, 110 )
	406	#endif
	407	DO
	408	ii = MAXLOC( sum )
	409	i = ii(1)
[1353]	410	IF ( sum(i) /= -1.0_wp ) THEN
[1318]	411	WRITE ( 18, 102 ) &
[1353]	412	log_point(i)%place, log_point(i)%sum, &
	413	log_point(i)%sum / log_point(1)%sum * 100.0_wp, &
[1318]	414	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
[1353]	415	sum(i) = -1.0_wp
[1318]	416	ELSE
	417	EXIT
	418	ENDIF
	419	ENDDO
[1]	420	ENDIF
	421
	422
[1318]	423	!
	424	!-- The same procedure again for the individual measurements.
	425	!
	426	!-- Compute cpu-times in seconds
	427	log_point_s%mtime = log_point_s%mtime / norm
	428	log_point_s%sum = log_point_s%sum / norm
	429	log_point_s%vector = log_point_s%vector / norm
	430	WHERE ( log_point_s%counts /= 0 )
	431	log_point_s%mean = log_point_s%sum / log_point_s%counts
	432	END WHERE
	433
	434	!
	435	!-- Collect cpu-times from all PEs and calculate statistics
	436	#if defined( __parallel )
	437	!
	438	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
	439	!-- while still busy with receiving log_point-data (see above)
	440	CALL MPI_BARRIER( comm2d, ierr )
	441	#endif
	442	IF ( myid == 0 ) THEN
	443	!
	444	!-- Initialize temporary arrays needed for statistics
	445	pe_min = log_point_s%sum
	446	pe_max = log_point_s%sum ! need to be set in case of 1 PE
[1353]	447	pe_rms = 0.0_wp
[1318]	448
	449	#if defined( __parallel )
	450	!
	451	!-- Receive data from all PEs
	452	DO i = 1, numprocs-1
	453	CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
	454	MPI_ANY_SOURCE, MPI_ANY_TAG, comm2d, status, ierr )
	455	sender = status(MPI_SOURCE)
	456	pe_log_points(:,sender) = pe_max
	457	ENDDO
	458	pe_log_points(:,0) = log_point_s%sum ! Results from PE0
	459	!
	460	!-- Calculate mean of all PEs, store it on log_point_s%sum
	461	!-- and find minimum and maximum
	462	DO iii = 1, SIZE( log_point )
	463	DO i = 1, numprocs-1
	464	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points(iii,i)
	465	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	466	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	467	ENDDO
	468	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
	469	!
	470	!-- Calculate rms
	471	DO i = 0, numprocs-1
[1353]	472	pe_rms(iii) = pe_rms(iii) + ( &
[1318]	473	pe_log_points(iii,i) - log_point_s(iii)%sum &
	474	)**2
	475	ENDDO
	476	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	477	ENDDO
	478	ELSE
	479	!
	480	!-- Send data to PE0 (pe_max is used as temporary storage to send
	481	!-- the data in order to avoid sending the data type log)
	482	pe_max = log_point_s%sum
	483	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, 0, comm2d, &
	484	ierr )
	485	#endif
	486
	487	ENDIF
	488
	489	!
	490	!-- Write cpu-times
	491	IF ( myid == 0 ) THEN
	492	!
	493	!-- Re-store sums
	494	WHERE ( log_point_s%counts /= 0 )
	495	sum = log_point_s%sum
	496	ELSEWHERE
[1353]	497	sum = -1.0_wp
[1318]	498	ENDWHERE
	499
	500	!
	501	!-- Write cpu-times sorted by size
	502	WRITE ( 18, 101 )
	503	DO
	504	ii = MAXLOC( sum )
	505	i = ii(1)
[1353]	506	IF ( sum(i) /= -1.0_wp ) THEN
	507	WRITE ( 18, 102 ) &
	508	log_point_s(i)%place, log_point_s(i)%sum, &
	509	log_point_s(i)%sum / log_point(1)%sum * 100.0_wp, &
[1318]	510	log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
[1353]	511	sum(i) = -1.0_wp
[1318]	512	ELSE
	513	EXIT
	514	ENDIF
	515	ENDDO
	516
	517	!
	518	!-- Output of handling of MPI operations
	519	IF ( collective_wait ) THEN
	520	WRITE ( 18, 103 )
	521	ELSE
	522	WRITE ( 18, 104 )
	523	ENDIF
	524	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
	525	IF ( synchronous_exchange ) THEN
	526	WRITE ( 18, 105 )
	527	ELSE
	528	WRITE ( 18, 106 )
	529	ENDIF
	530
	531	!
	532	!-- Empty lines in order to create a gap to the results of the model
	533	!-- continuation runs
	534	WRITE ( 18, 107 )
	535
	536	!
	537	!-- Unit 18 is not needed anymore
	538	CALL close_file( 18 )
	539
	540	ENDIF
	541
[1402]	542	CALL location_message( 'finished', .TRUE. )
[1318]	543
	544	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
	545	&') tasks *',I5,' threads):'// &
	546	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
	547	'nr of timesteps: ',22X,I6/ &
	548	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
	549
	550	101 FORMAT (/'special measures:'/ &
	551	&'-----------------------------------------------------------', &
	552	&'--------------------')
	553
	554	102 FORMAT (A20,2X,F9.3,2X,F7.2,1X,I7,3(1X,F9.3))
	555	103 FORMAT (/'Barriers are set in front of collective operations')
	556	104 FORMAT (/'No barriers are set in front of collective operations')
	557	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
	558	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
	559	107 FORMAT (//)
	560	108 FORMAT ('Accelerator boards per node: ',14X,I2)
	561	109 FORMAT ('Accelerator boards: ',23X,I2)
	562	110 FORMAT ('----------------------------------------------------------', &
	563	&'------------'//&
	564	&'place: mean counts min ', &
	565	&' max rms'/ &
	566	&' sec. % sec. ', &
	567	&' sec. sec.'/ &
	568	&'-----------------------------------------------------------', &
	569	&'-------------------')
	570	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
	571
	572	END SUBROUTINE cpu_statistics
	573
	574	END MODULE cpulog

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