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source: palm/trunk/SOURCE/cpulog.f90 @ 1817

Last change on this file since 1817 was 1809, checked in by raasch, 9 years ago
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[1682]	1	!> @file cpulog.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	!
[1310]	16	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[1403]	21	!
[1809]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: cpulog.f90 1809 2016-04-05 20:13:28Z maronga $
	26	!
[1809]	27	! 1808 2016-04-05 19:44:00Z raasch
	28	! cpu measurements are done with standard FORTRAN routine on every machine
	29	!
[1683]	30	! 1682 2015-10-07 23:56:08Z knoop
	31	! Code annotations made doxygen readable
	32	!
[1403]	33	! 1402 2014-05-09 14:25:13Z raasch
	34	! location messages added
	35	!
[1370]	36	! 1369 2014-04-24 05:57:38Z raasch
	37	! routine description added
	38	!
[1354]	39	! 1353 2014-04-08 15:21:23Z heinze
	40	! REAL constants provided with KIND-attribute
	41	!
[1323]	42	! 1322 2014-03-20 16:38:49Z raasch
	43	! REAL functions provided with KIND-attribute
	44	!
[1321]	45	! 1320 2014-03-20 08:40:49Z raasch
[1320]	46	! ONLY-attribute added to USE-statements,
	47	! kind-parameters added to all INTEGER and REAL declaration statements,
	48	! kinds are defined in new module kinds,
	49	! revision history before 2012 removed,
	50	! comment fields (!:) to be used for variable explanations added to
	51	! all variable declaration statements
[1321]	52	!
[1319]	53	! 1318 2014-03-17 13:35:16Z raasch
	54	! former files/routines cpu_log and cpu_statistics combined to one module,
	55	! which also includes the former data module cpulog from the modules-file
	56	!
[1037]	57	! 1036 2012-10-22 13:43:42Z raasch
	58	! code put under GPL (PALM 3.9)
	59	!
[1]	60	! Revision 1.1 1997/07/24 11:12:29 raasch
	61	! Initial revision
	62	!
	63	!
	64	! Description:
	65	! ------------
[1682]	66	!> CPU-time measurements for any program part whatever. Results of the
	67	!> measurements are output at the end of the run in local file CPU_MEASURES.
	68	!>
	69	!> To measure the CPU-time (better to say the wallclock time) of a specific code
	70	!> segment, two calls of cpu_log have to be used as brackets in front and at the
	71	!> end of the segment:
	72	!>
	73	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
	74	!> ... code segment ...
	75	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
	76	!>
	77	!> Parts of the code segment can be excluded from the measurement by additional
	78	!> call of cpu_log:
	79	!>
	80	!> ... first segment to be measured
	81	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
	82	!> ... oart of segment to be excluded from measurement
	83	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
	84	!> ... second segment to be mesasured
	85	!>
	86	!> n is an INTEGER within the interval [1,100] defining the id of the specific
	87	!> code segment, 'any identifier' is a string describing the code segment to be
	88	!> measured. It can be freely chosen and results will appear under this name in
	89	!> file CPU_MEASURES. ids can only be used once. If you like to do a
	90	!> measurement of a new part of the code, please look for an id which is unused
	91	!> ao far.
	92	!>
	93	!> d3par-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
	95	!> idle times (due to MPI calls in the code segment, which are
	96	!> waiting for other processes to be finished) affect the measurements.
	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	!>
	102	!> Variable log_point should be used for non-overlapping code segments, and they
	103	!> should sum up to the total cpu-time required by the complete run.
	104	!> Variable log_point_s can be used for any other special (s) measurements.
[3]	105	!------------------------------------------------------------------------------!
[1682]	106	MODULE cpulog
	107
[1]	108
[1320]	109	USE control_parameters, &
	110	ONLY: message_string, nr_timesteps_this_run, run_description_header, &
	111	synchronous_exchange
	112
	113	USE indices, &
	114	ONLY: nx, ny, nz
	115
	116	USE kinds
	117
[1]	118	USE pegrid
	119
	120	IMPLICIT NONE
	121
[1318]	122	PRIVATE
[1320]	123	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, &
[1318]	124	initial_wallclock_time, 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
[1682]	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
[1682]	139	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
	140	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
[1318]	141
[1682]	142	REAL(wp) :: initial_wallclock_time !<
[1318]	143
	144	TYPE logpoint
[1682]	145	REAL(wp) :: isum !<
	146	REAL(wp) :: ivect !<
	147	REAL(wp) :: mean !<
	148	REAL(wp) :: mtime !<
	149	REAL(wp) :: mtimevec !<
	150	REAL(wp) :: sum !<
	151	REAL(wp) :: vector !<
	152	INTEGER(iwp) :: counts !<
	153	CHARACTER (LEN=20) :: place !<
[1318]	154	END TYPE logpoint
	155
[1353]	156	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_wp, 0.0_wp, &
	157	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	158	0, ' ' ), &
	159	log_point_s = logpoint( 0.0_wp, 0.0_wp, &
	160	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	161	0, ' ' )
[1318]	162
	163	SAVE
	164
	165	CONTAINS
	166
[1682]	167	!------------------------------------------------------------------------------!
	168	! Description:
	169	! ------------
	170	!> @todo Missing subroutine description.
	171	!------------------------------------------------------------------------------!
[1318]	172	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
	173
	174	IMPLICIT NONE
	175
[1682]	176	CHARACTER (LEN=*) :: modus !<
	177	CHARACTER (LEN=*) :: place !<
[1320]	178
[1682]	179	LOGICAL :: wait_allowed !<
	180	LOGICAL, OPTIONAL :: barrierwait !<
	181	LOGICAL, SAVE :: first = .TRUE. !<
[1320]	182
[1682]	183	REAL(wp) :: mtime = 0.0_wp !<
	184	REAL(wp) :: mtimevec = 0.0_wp !<
	185	TYPE(logpoint) :: log_event !<
[1318]	186
[1682]	187	INTEGER(idp) :: count !<
	188	INTEGER(idp) :: count_rate !<
[1]	189
	190
	191	!
[1318]	192	!-- Initialize and check, respectively, point of measurement
	193	IF ( log_event%place == ' ' ) THEN
	194	log_event%place = place
	195	ELSEIF ( log_event%place /= place ) THEN
[1320]	196	WRITE( message_string, * ) 'wrong argument & expected: ', &
[1318]	197	TRIM(log_event%place), ' given: ', TRIM( place )
	198	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
	199	ENDIF
[1]	200
	201	!
[1318]	202	!-- Determine, if barriers are allowed to set
	203	IF ( PRESENT( barrierwait ) ) THEN
	204	wait_allowed = barrierwait
	205	ELSE
	206	wait_allowed = .TRUE.
	207	ENDIF
	208
	209	!
	210	!-- MPI barrier, if requested, in order to avoid measuring wait times
	211	!-- caused by MPI routines waiting for other MPI routines of other
	212	!-- PEs that have not yet finished
	213	#if defined( __parallel )
[1320]	214	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
[1318]	215	( modus == 'start' .OR. modus == 'continue' ) ) THEN
	216	CALL MPI_BARRIER( comm2d, ierr )
	217	ENDIF
	218	#endif
	219
	220	!
	221	!-- Take current time
	222	CALL SYSTEM_CLOCK( count, count_rate )
[1322]	223	mtime = REAL( count, KIND=wp ) / REAL( count_rate, KIND=wp )
[1]	224
	225	!
[1318]	226	!-- Start, stop or pause measurement
	227	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
	228	log_event%mtime = mtime
	229	log_event%mtimevec = mtimevec
	230	ELSEIF ( modus == 'pause' ) THEN
	231	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
[1320]	232	WRITE( message_string, * ) 'negative time interval occured', &
	233	' &PE',myid,' L=PAUSE "',TRIM(log_event%place), &
	234	'" new=', mtime,' last=',log_event%mtime
[1318]	235	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
	236	first = .FALSE.
	237	ENDIF
	238	log_event%isum = log_event%isum + mtime - log_event%mtime
	239	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
	240	ELSEIF ( modus == 'stop' ) THEN
[1320]	241	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. &
[1318]	242	first ) THEN
[1320]	243	WRITE( message_string, * ) 'negative time interval occured', &
[1318]	244	' &PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
	245	mtime,' last=',log_event%mtime,' isum=',log_event%isum
	246	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
	247	first = .FALSE.
	248	ENDIF
	249	log_event%mtime = mtime - log_event%mtime + log_event%isum
	250	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
	251	log_event%sum = log_event%sum + log_event%mtime
	252	IF ( log_event%sum < 0.0 .AND. first ) THEN
[1320]	253	WRITE( message_string, * ) 'negative time interval occured', &
[1318]	254	' &PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
	255	log_event%sum,' mtime=',log_event%mtime
	256	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
	257	first = .FALSE.
	258	ENDIF
	259	log_event%vector = log_event%vector + log_event%mtimevec
	260	log_event%counts = log_event%counts + 1
[1353]	261	log_event%isum = 0.0_wp
	262	log_event%ivect = 0.0_wp
[1318]	263	ELSE
	264	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
	265	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
[1]	266	ENDIF
[1318]	267
	268	END SUBROUTINE cpu_log
	269
	270
	271	!------------------------------------------------------------------------------!
	272	! Description:
	273	! ------------
[1682]	274	!> Analysis and output of the cpu-times measured. All PE results are collected
	275	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
	276	!> statistics. The output is sorted according to the amount of cpu-time consumed
	277	!> and output on PE0.
[1318]	278	!------------------------------------------------------------------------------!
[1682]	279
	280	SUBROUTINE cpu_statistics
[1318]	281
	282	IMPLICIT NONE
	283
[1682]	284	INTEGER(iwp) :: i !<
	285	INTEGER(iwp) :: ii(1) !<
	286	INTEGER(iwp) :: iii !<
	287	INTEGER(iwp) :: sender !<
	288	REAL(wp) :: average_cputime !<
	289	REAL(wp), SAVE :: norm = 1.0_wp !<
	290	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_max !<
	291	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_min !<
	292	REAL(wp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
	293	REAL(wp), DIMENSION(:), ALLOCATABLE :: sum !<
	294	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
[1318]	295
	296
[1402]	297	CALL location_message( 'calculating cpu statistics', .FALSE. )
	298
[1318]	299	!
	300	!-- Compute cpu-times in seconds
	301	log_point%mtime = log_point%mtime / norm
	302	log_point%sum = log_point%sum / norm
	303	log_point%vector = log_point%vector / norm
	304	WHERE ( log_point%counts /= 0 )
	305	log_point%mean = log_point%sum / log_point%counts
	306	END WHERE
	307
	308
	309	!
	310	!-- Collect cpu-times from all PEs and calculate statistics
	311	IF ( myid == 0 ) THEN
	312	!
	313	!-- Allocate and initialize temporary arrays needed for statistics
[1320]	314	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
	315	pe_rms( SIZE( log_point ) ), &
[1318]	316	pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
	317	pe_min = log_point%sum
	318	pe_max = log_point%sum ! need to be set in case of 1 PE
[1353]	319	pe_rms = 0.0_wp
[1318]	320
	321	#if defined( __parallel )
	322	!
	323	!-- Receive data from all PEs
	324	DO i = 1, numprocs-1
[1320]	325	CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
[1318]	326	i, i, comm2d, status, ierr )
	327	sender = status(MPI_SOURCE)
	328	pe_log_points(:,sender) = pe_max
	329	ENDDO
	330	pe_log_points(:,0) = log_point%sum ! Results from PE0
	331	!
	332	!-- Calculate mean of all PEs, store it on log_point%sum
	333	!-- and find minimum and maximum
	334	DO iii = 1, SIZE( log_point )
	335	DO i = 1, numprocs-1
	336	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
	337	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	338	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	339	ENDDO
	340	log_point(iii)%sum = log_point(iii)%sum / numprocs
	341	!
	342	!-- Calculate rms
	343	DO i = 0, numprocs-1
[1320]	344	pe_rms(iii) = pe_rms(iii) + ( &
	345	pe_log_points(iii,i) - log_point(iii)%sum &
[1318]	346	)**2
	347	ENDDO
	348	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	349	ENDDO
	350	ELSE
	351	!
	352	!-- Send data to PE0 (pe_max is used as temporary storage to send
	353	!-- the data in order to avoid sending the data type log)
	354	ALLOCATE( pe_max( SIZE( log_point ) ) )
	355	pe_max = log_point%sum
	356	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, myid, comm2d, &
	357	ierr )
	358	#endif
	359
[1]	360	ENDIF
[1318]	361
	362	!
	363	!-- Write cpu-times
	364	IF ( myid == 0 ) THEN
	365	!
	366	!-- Re-store sums
	367	ALLOCATE( sum( SIZE( log_point ) ) )
	368	WHERE ( log_point%counts /= 0 )
	369	sum = log_point%sum
	370	ELSEWHERE
[1353]	371	sum = -1.0_wp
[1318]	372	ENDWHERE
	373
	374	!
	375	!-- Get total time in order to calculate CPU-time per gridpoint and timestep
	376	IF ( nr_timesteps_this_run /= 0 ) THEN
[1322]	377	average_cputime = log_point(1)%sum / REAL( (nx+1) * (ny+1) * nz, KIND=wp ) / &
	378	REAL( nr_timesteps_this_run, KIND=wp ) * 1E6_wp ! in micro-sec
[1318]	379	ELSE
[1353]	380	average_cputime = -1.0_wp
[1318]	381	ENDIF
	382
	383	!
	384	!-- Write cpu-times sorted by size
	385	CALL check_open( 18 )
	386	#if defined( __parallel )
	387	WRITE ( 18, 100 ) TRIM( run_description_header ), &
	388	numprocs * threads_per_task, pdims(1), pdims(2), &
	389	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	390	average_cputime
	391
	392	IF ( num_acc_per_node /= 0 ) WRITE ( 18, 108 ) num_acc_per_node
	393	WRITE ( 18, 110 )
	394	#else
	395	WRITE ( 18, 100 ) TRIM( run_description_header ), &
	396	numprocs * threads_per_task, 1, 1, &
	397	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
	398	average_cputime
	399
	400	IF ( num_acc_per_node /= 0 ) WRITE ( 18, 109 ) num_acc_per_node
	401	WRITE ( 18, 110 )
	402	#endif
	403	DO
	404	ii = MAXLOC( sum )
	405	i = ii(1)
[1353]	406	IF ( sum(i) /= -1.0_wp ) THEN
[1318]	407	WRITE ( 18, 102 ) &
[1353]	408	log_point(i)%place, log_point(i)%sum, &
	409	log_point(i)%sum / log_point(1)%sum * 100.0_wp, &
[1318]	410	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
[1353]	411	sum(i) = -1.0_wp
[1318]	412	ELSE
	413	EXIT
	414	ENDIF
	415	ENDDO
[1]	416	ENDIF
	417
	418
[1318]	419	!
	420	!-- The same procedure again for the individual measurements.
	421	!
	422	!-- Compute cpu-times in seconds
	423	log_point_s%mtime = log_point_s%mtime / norm
	424	log_point_s%sum = log_point_s%sum / norm
	425	log_point_s%vector = log_point_s%vector / norm
	426	WHERE ( log_point_s%counts /= 0 )
	427	log_point_s%mean = log_point_s%sum / log_point_s%counts
	428	END WHERE
	429
	430	!
	431	!-- Collect cpu-times from all PEs and calculate statistics
	432	#if defined( __parallel )
	433	!
	434	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
	435	!-- while still busy with receiving log_point-data (see above)
	436	CALL MPI_BARRIER( comm2d, ierr )
	437	#endif
	438	IF ( myid == 0 ) THEN
	439	!
	440	!-- Initialize temporary arrays needed for statistics
	441	pe_min = log_point_s%sum
	442	pe_max = log_point_s%sum ! need to be set in case of 1 PE
[1353]	443	pe_rms = 0.0_wp
[1318]	444
	445	#if defined( __parallel )
	446	!
	447	!-- Receive data from all PEs
	448	DO i = 1, numprocs-1
	449	CALL MPI_RECV( pe_max(1), SIZE( log_point ), MPI_REAL, &
	450	MPI_ANY_SOURCE, MPI_ANY_TAG, comm2d, status, ierr )
	451	sender = status(MPI_SOURCE)
	452	pe_log_points(:,sender) = pe_max
	453	ENDDO
	454	pe_log_points(:,0) = log_point_s%sum ! Results from PE0
	455	!
	456	!-- Calculate mean of all PEs, store it on log_point_s%sum
	457	!-- and find minimum and maximum
	458	DO iii = 1, SIZE( log_point )
	459	DO i = 1, numprocs-1
	460	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points(iii,i)
	461	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
	462	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
	463	ENDDO
	464	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
	465	!
	466	!-- Calculate rms
	467	DO i = 0, numprocs-1
[1353]	468	pe_rms(iii) = pe_rms(iii) + ( &
[1318]	469	pe_log_points(iii,i) - log_point_s(iii)%sum &
	470	)**2
	471	ENDDO
	472	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
	473	ENDDO
	474	ELSE
	475	!
	476	!-- Send data to PE0 (pe_max is used as temporary storage to send
	477	!-- the data in order to avoid sending the data type log)
	478	pe_max = log_point_s%sum
	479	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_REAL, 0, 0, comm2d, &
	480	ierr )
	481	#endif
	482
	483	ENDIF
	484
	485	!
	486	!-- Write cpu-times
	487	IF ( myid == 0 ) THEN
	488	!
	489	!-- Re-store sums
	490	WHERE ( log_point_s%counts /= 0 )
	491	sum = log_point_s%sum
	492	ELSEWHERE
[1353]	493	sum = -1.0_wp
[1318]	494	ENDWHERE
	495
	496	!
	497	!-- Write cpu-times sorted by size
	498	WRITE ( 18, 101 )
	499	DO
	500	ii = MAXLOC( sum )
	501	i = ii(1)
[1353]	502	IF ( sum(i) /= -1.0_wp ) THEN
	503	WRITE ( 18, 102 ) &
	504	log_point_s(i)%place, log_point_s(i)%sum, &
	505	log_point_s(i)%sum / log_point(1)%sum * 100.0_wp, &
[1318]	506	log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
[1353]	507	sum(i) = -1.0_wp
[1318]	508	ELSE
	509	EXIT
	510	ENDIF
	511	ENDDO
	512
	513	!
	514	!-- Output of handling of MPI operations
	515	IF ( collective_wait ) THEN
	516	WRITE ( 18, 103 )
	517	ELSE
	518	WRITE ( 18, 104 )
	519	ENDIF
	520	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
	521	IF ( synchronous_exchange ) THEN
	522	WRITE ( 18, 105 )
	523	ELSE
	524	WRITE ( 18, 106 )
	525	ENDIF
	526
	527	!
	528	!-- Empty lines in order to create a gap to the results of the model
	529	!-- continuation runs
	530	WRITE ( 18, 107 )
	531
	532	!
	533	!-- Unit 18 is not needed anymore
	534	CALL close_file( 18 )
	535
	536	ENDIF
	537
[1402]	538	CALL location_message( 'finished', .TRUE. )
[1318]	539
	540	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
	541	&') tasks *',I5,' threads):'// &
	542	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
	543	'nr of timesteps: ',22X,I6/ &
	544	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
	545
	546	101 FORMAT (/'special measures:'/ &
	547	&'-----------------------------------------------------------', &
	548	&'--------------------')
	549
	550	102 FORMAT (A20,2X,F9.3,2X,F7.2,1X,I7,3(1X,F9.3))
	551	103 FORMAT (/'Barriers are set in front of collective operations')
	552	104 FORMAT (/'No barriers are set in front of collective operations')
	553	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
	554	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
	555	107 FORMAT (//)
	556	108 FORMAT ('Accelerator boards per node: ',14X,I2)
	557	109 FORMAT ('Accelerator boards: ',23X,I2)
	558	110 FORMAT ('----------------------------------------------------------', &
	559	&'------------'//&
	560	&'place: mean counts min ', &
	561	&' max rms'/ &
	562	&' sec. % sec. ', &
	563	&' sec. sec.'/ &
	564	&'-----------------------------------------------------------', &
	565	&'-------------------')
	566	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
	567
	568	END SUBROUTINE cpu_statistics
	569
	570	END MODULE cpulog

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