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source: palm/trunk/SOURCE/cpulog_mod.f90 @ 4096

Last change on this file since 4096 was 4015, checked in by raasch, 5 years ago
all reals changed to double precision in order to work with 32-bit working precision, otherwise calculated time intervals would mostly give zero; variable child_domain_nvn eliminated
Property svn:keywords set to `Id`
File size: 22.9 KB

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1	!> @file cpulog_mod.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
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.
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	!
17	! Copyright 1997-2019 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: cpulog_mod.f90 4015 2019-06-05 13:25:35Z motisi $
27	! all reals changed to double precision in order to work with 32-bit working precision,
28	! otherwise calculated time intervals would mostly give zero
29	!
30	! 3885 2019-04-11 11:29:34Z kanani
31	! Changes related to global restructuring of location messages and introduction
32	! of additional debug messages
33	!
34	! 3655 2019-01-07 16:51:22Z knoop
35	! output format limited to a maximum line length of 80
36	!
37	! 3229 2018-09-04 15:05:36Z sward
38	! Bugfix in maximum time spent per log point: PE 0 was beeing ignored.
39	!
40	! 3049 2018-05-29 13:52:36Z Giersch
41	! Error messages revised
42	!
43	! 3045 2018-05-28 07:55:41Z Giersch
44	! Error messages revised
45	!
46	! 3028 2018-05-23 10:27:23Z knoop
47	! renamed d3par to runtime_parameters
48	!
49	! 2718 2018-01-02 08:49:38Z maronga
50	! Corrected "Former revisions" section
51	!
52	! 2696 2017-12-14 17:12:51Z kanani
53	! Change in file header (GPL part)
54	!
55	! 2266 2017-06-09 09:27:21Z raasch
56	! bugfix: cpu-time per grid point is now calculated using ngp_3d in order to
57	! avoid integer overflow,
58	! some re-formatting
59	!
60	! 2119 2017-01-17 16:51:50Z raasch
61	!
62	! 2118 2017-01-17 16:38:49Z raasch
63	! OpenACC relevant code removed
64	!
65	! 2000 2016-08-20 18:09:15Z knoop
66	! Forced header and separation lines into 80 columns
67	!
68	! 1931 2016-06-10 12:06:59Z suehring
69	! Adjustment in character length and format statement
70	!
71	! 1850 2016-04-08 13:29:27Z maronga
72	! Module renamed
73	!
74	!
75	! 1808 2016-04-05 19:44:00Z raasch
76	! cpu measurements are done with standard FORTRAN routine on every machine
77	!
78	! 1682 2015-10-07 23:56:08Z knoop
79	! Code annotations made doxygen readable
80	!
81	! 1402 2014-05-09 14:25:13Z raasch
82	! location messages added
83	!
84	! 1369 2014-04-24 05:57:38Z raasch
85	! routine description added
86	!
87	! 1353 2014-04-08 15:21:23Z heinze
88	! REAL constants provided with KIND-attribute
89	!
90	! 1322 2014-03-20 16:38:49Z raasch
91	! REAL functions provided with KIND-attribute
92	!
93	! 1320 2014-03-20 08:40:49Z raasch
94	! ONLY-attribute added to USE-statements,
95	! kind-parameters added to all INTEGER and REAL declaration statements,
96	! kinds are defined in new module kinds,
97	! revision history before 2012 removed,
98	! comment fields (!:) to be used for variable explanations added to
99	! all variable declaration statements
100	!
101	! 1318 2014-03-17 13:35:16Z raasch
102	! former files/routines cpu_log and cpu_statistics combined to one module,
103	! which also includes the former data module cpulog from the modules-file
104	!
105	! 1036 2012-10-22 13:43:42Z raasch
106	! code put under GPL (PALM 3.9)
107	!
108	! Revision 1.1 1997/07/24 11:12:29 raasch
109	! Initial revision
110	!
111	!
112	! Description:
113	! ------------
114	!> CPU-time measurements for any program part whatever. Results of the
115	!> measurements are output at the end of the run in local file CPU_MEASURES.
116	!>
117	!> To measure the CPU-time (better to say the wallclock time) of a specific code
118	!> segment, two calls of cpu_log have to be used as brackets in front and at the
119	!> end of the segment:
120	!>
121	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
122	!> ... code segment ...
123	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
124	!>
125	!> Parts of the code segment can be excluded from the measurement by additional
126	!> call of cpu_log:
127	!>
128	!> ... first segment to be measured
129	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
130	!> ... oart of segment to be excluded from measurement
131	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
132	!> ... second segment to be mesasured
133	!>
134	!> n is an INTEGER within the interval [1,100] defining the id of the specific
135	!> code segment, 'any identifier' is a string describing the code segment to be
136	!> measured. It can be freely chosen and results will appear under this name in
137	!> file CPU_MEASURES. ids can only be used once. If you like to do a
138	!> measurement of a new part of the code, please look for an id which is unused
139	!> ao far.
140	!>
141	!> runtime_parameters-parameter cpu_log_barrierwait can be used to set an MPI
142	!> barrier at the beginning of the measurement (modus 'start' or 'continue'),
143	!> to avoid that idle times (due to MPI calls in the code segment, which are
144	!> waiting for other processes to be finished) affect the measurements.
145	!> If barriers shall not be used at all, a fourth, optional parameter has to be
146	!> given:
147	!>
148	!> CALL cpu_log( ..., ..., 'start', cpu_log_nowait )
149	!>
150	!> Variable log_point should be used for non-overlapping code segments, and they
151	!> should sum up to the total cpu-time required by the complete run.
152	!> Variable log_point_s can be used for any other special (s) measurements.
153	!------------------------------------------------------------------------------!
154	MODULE cpulog
155
156
157	USE control_parameters, &
158	ONLY: message_string, nr_timesteps_this_run, run_description_header, synchronous_exchange
159
160	USE indices, &
161	ONLY: ngp_3d, nx, ny, nz
162
163	USE kinds
164
165	USE pegrid
166
167	IMPLICIT NONE
168
169	PRIVATE
170	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, initial_wallclock_time, &
171	log_point, log_point_s
172
173	INTERFACE cpu_log
174	MODULE PROCEDURE cpu_log
175	END INTERFACE cpu_log
176
177	INTERFACE cpu_statistics
178	MODULE PROCEDURE cpu_statistics
179	END INTERFACE cpu_statistics
180
181	INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !<
182	INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !<
183	INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !<
184	INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !<
185
186	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
187	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
188
189	REAL(dp) :: initial_wallclock_time !<
190
191	TYPE logpoint
192	REAL(dp) :: isum !<
193	REAL(dp) :: ivect !<
194	REAL(dp) :: mean !<
195	REAL(dp) :: mtime !<
196	REAL(dp) :: mtimevec !<
197	REAL(dp) :: sum !<
198	REAL(dp) :: vector !<
199	INTEGER(iwp) :: counts !<
200	CHARACTER (LEN=25) :: place !<
201	END TYPE logpoint
202
203	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
204	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
205	TYPE(logpoint), DIMENSION(100) :: log_point_s = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
206	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
207
208	SAVE
209
210	CONTAINS
211
212	!------------------------------------------------------------------------------!
213	! Description:
214	! ------------
215	!> @todo Missing subroutine description.
216	!------------------------------------------------------------------------------!
217	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
218
219	IMPLICIT NONE
220
221	CHARACTER (LEN=*) :: modus !<
222	CHARACTER (LEN=*) :: place !<
223
224	LOGICAL :: wait_allowed !<
225	LOGICAL, OPTIONAL :: barrierwait !<
226	LOGICAL, SAVE :: first = .TRUE. !<
227
228	REAL(dp) :: mtime = 0.0_dp !<
229	REAL(dp) :: mtimevec = 0.0_dp !<
230	TYPE(logpoint) :: log_event !<
231
232	INTEGER(idp) :: count !<
233	INTEGER(idp) :: count_rate !<
234
235
236	!
237	!-- Initialize and check, respectively, point of measurement
238	IF ( log_event%place == ' ' ) THEN
239	log_event%place = place
240	ELSEIF ( log_event%place /= place ) THEN
241	WRITE( message_string, * ) 'wrong argument expected: ', &
242	TRIM(log_event%place), ' given: ', TRIM( place )
243	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
244	ENDIF
245
246	!
247	!-- Determine, if barriers are allowed to set
248	IF ( PRESENT( barrierwait ) ) THEN
249	wait_allowed = barrierwait
250	ELSE
251	wait_allowed = .TRUE.
252	ENDIF
253
254	!
255	!-- MPI barrier, if requested, in order to avoid measuring wait times
256	!-- caused by MPI routines waiting for other MPI routines of other
257	!-- PEs that have not yet finished
258	#if defined( __parallel )
259	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
260	( modus == 'start' .OR. modus == 'continue' ) ) THEN
261	CALL MPI_BARRIER( comm2d, ierr )
262	ENDIF
263	#endif
264
265	!
266	!-- Take current time
267	CALL SYSTEM_CLOCK( count, count_rate )
268	mtime = REAL( count, KIND=dp ) / REAL( count_rate, KIND=dp )
269
270	!
271	!-- Start, stop or pause measurement
272	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
273	log_event%mtime = mtime
274	log_event%mtimevec = mtimevec
275	ELSEIF ( modus == 'pause' ) THEN
276	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
277	WRITE( message_string, * ) 'negative time interval occured', &
278	'&PE',myid,' L=PAUSE "',TRIM(log_event%place), &
279	'" new=', mtime,' last=',log_event%mtime
280	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
281	first = .FALSE.
282	ENDIF
283	log_event%isum = log_event%isum + mtime - log_event%mtime
284	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
285	ELSEIF ( modus == 'stop' ) THEN
286	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. first ) THEN
287	WRITE( message_string, * ) 'negative time interval occured', &
288	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
289	mtime,' last=',log_event%mtime,' isum=',log_event%isum
290	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
291	first = .FALSE.
292	ENDIF
293	log_event%mtime = mtime - log_event%mtime + log_event%isum
294	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
295	log_event%sum = log_event%sum + log_event%mtime
296	IF ( log_event%sum < 0.0 .AND. first ) THEN
297	WRITE( message_string, * ) 'negative time interval occured', &
298	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
299	log_event%sum,' mtime=',log_event%mtime
300	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
301	first = .FALSE.
302	ENDIF
303	log_event%vector = log_event%vector + log_event%mtimevec
304	log_event%counts = log_event%counts + 1
305	log_event%isum = 0.0_dp
306	log_event%ivect = 0.0_dp
307	ELSE
308	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
309	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
310	ENDIF
311
312	END SUBROUTINE cpu_log
313
314
315	!------------------------------------------------------------------------------!
316	! Description:
317	! ------------
318	!> Analysis and output of the cpu-times measured. All PE results are collected
319	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
320	!> statistics. The output is sorted according to the amount of cpu-time consumed
321	!> and output on PE0.
322	!------------------------------------------------------------------------------!
323
324	SUBROUTINE cpu_statistics
325
326	IMPLICIT NONE
327
328	INTEGER(iwp) :: i !<
329	INTEGER(iwp) :: ii(1) !<
330	INTEGER(iwp) :: iii !<
331	INTEGER(iwp) :: sender !<
332	REAL(dp) :: average_cputime !<
333	REAL(dp), SAVE :: norm = 1.0_dp !<
334	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max !<
335	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min !<
336	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
337	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp !<
338	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum !<
339	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
340
341
342	CALL location_message( 'calculating cpu statistics', 'start' )
343
344	!
345	!-- Compute cpu-times in seconds
346	log_point%mtime = log_point%mtime / norm
347	log_point%sum = log_point%sum / norm
348	log_point%vector = log_point%vector / norm
349	WHERE ( log_point%counts /= 0 )
350	log_point%mean = log_point%sum / log_point%counts
351	END WHERE
352
353
354	!
355	!-- Collect cpu-times from all PEs and calculate statistics
356	IF ( myid == 0 ) THEN
357	!
358	!-- Allocate and initialize temporary arrays needed for statistics
359	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
360	pe_rms( SIZE( log_point ) ), pe_tmp( SIZE( log_point ) ), &
361	pe_log_points( SIZE( log_point ), 0:numprocs-1 ) )
362	pe_min = log_point%sum
363	pe_max = log_point%sum ! need to be set in case of 1 PE
364	pe_rms = 0.0_dp
365	pe_tmp = 0.0_dp
366
367	#if defined( __parallel )
368	!
369	!-- Receive data from all PEs
370	DO i = 1, numprocs-1
371	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, i, i, comm2d, &
372	status, ierr )
373	sender = status(MPI_SOURCE)
374	pe_log_points(:,sender) = pe_tmp
375	ENDDO
376	pe_log_points(:,0) = log_point%sum ! Results from PE0
377	!
378	!-- Calculate mean of all PEs, store it on log_point%sum
379	!-- and find minimum and maximum
380	DO iii = 1, SIZE( log_point )
381	DO i = 1, numprocs-1
382	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
383	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
384	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
385	ENDDO
386	log_point(iii)%sum = log_point(iii)%sum / numprocs
387	!
388	!-- Calculate rms
389	DO i = 0, numprocs-1
390	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point(iii)%sum )**2
391	ENDDO
392	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
393	ENDDO
394	ELSE
395	!
396	!-- Send data to PE0 (pe_max is used as temporary storage to send
397	!-- the data in order to avoid sending the data type log)
398	ALLOCATE( pe_max( SIZE( log_point ) ) )
399	pe_max = log_point%sum
400	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, myid, comm2d, ierr )
401	#endif
402
403	ENDIF
404
405	!
406	!-- Write cpu-times
407	IF ( myid == 0 ) THEN
408	!
409	!-- Re-store sums
410	ALLOCATE( sum( SIZE( log_point ) ) )
411	WHERE ( log_point%counts /= 0 )
412	sum = log_point%sum
413	ELSEWHERE
414	sum = -1.0_dp
415	ENDWHERE
416
417	!
418	!-- Get total time in order to calculate CPU-time per gridpoint and
419	!-- timestep
420	IF ( nr_timesteps_this_run /= 0 ) THEN
421	average_cputime = log_point(1)%sum / REAL( ngp_3d(0), KIND=dp ) / &
422	REAL( nr_timesteps_this_run, KIND=dp ) * 1E6_dp ! in micro-sec
423	ELSE
424	average_cputime = -1.0_dp
425	ENDIF
426
427	!
428	!-- Write cpu-times sorted by size
429	CALL check_open( 18 )
430	#if defined( __parallel )
431	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, &
432	pdims(1), pdims(2), threads_per_task, nx+1, ny+1, nz, &
433	nr_timesteps_this_run, average_cputime
434
435	WRITE ( 18, 110 )
436	#else
437	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, 1, 1, &
438	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
439	average_cputime
440
441	WRITE ( 18, 110 )
442	#endif
443	DO
444	ii = MAXLOC( sum )
445	i = ii(1)
446	IF ( sum(i) /= -1.0_dp ) THEN
447	WRITE ( 18, 102 ) log_point(i)%place, log_point(i)%sum, &
448	log_point(i)%sum / log_point(1)%sum * 100.0_dp, &
449	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
450	sum(i) = -1.0_dp
451	ELSE
452	EXIT
453	ENDIF
454	ENDDO
455	ENDIF
456
457
458	!
459	!-- The same procedure again for the individual measurements.
460	!
461	!-- Compute cpu-times in seconds
462	log_point_s%mtime = log_point_s%mtime / norm
463	log_point_s%sum = log_point_s%sum / norm
464	log_point_s%vector = log_point_s%vector / norm
465	WHERE ( log_point_s%counts /= 0 )
466	log_point_s%mean = log_point_s%sum / log_point_s%counts
467	END WHERE
468
469	!
470	!-- Collect cpu-times from all PEs and calculate statistics
471	#if defined( __parallel )
472	!
473	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
474	!-- while still busy with receiving log_point-data (see above)
475	CALL MPI_BARRIER( comm2d, ierr )
476	#endif
477	IF ( myid == 0 ) THEN
478	!
479	!-- Initialize temporary arrays needed for statistics
480	pe_min = log_point_s%sum
481	pe_max = log_point_s%sum ! need to be set in case of 1 PE
482	pe_rms = 0.0_dp
483
484	#if defined( __parallel )
485	!
486	!-- Receive data from all PEs
487	DO i = 1, numprocs-1
488	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, MPI_ANY_SOURCE, &
489	MPI_ANY_TAG, comm2d, status, ierr )
490	sender = status(MPI_SOURCE)
491	pe_log_points(:,sender) = pe_tmp
492	ENDDO
493	pe_log_points(:,0) = log_point_s%sum ! Results from PE0
494	!
495	!-- Calculate mean of all PEs, store it on log_point_s%sum
496	!-- and find minimum and maximum
497	DO iii = 1, SIZE( log_point )
498	DO i = 1, numprocs-1
499	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points(iii,i)
500	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
501	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
502	ENDDO
503	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
504	!
505	!-- Calculate rms
506	DO i = 0, numprocs-1
507	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point_s(iii)%sum )**2
508	ENDDO
509	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
510	ENDDO
511	ELSE
512	!
513	!-- Send data to PE0 (pe_max is used as temporary storage to send
514	!-- the data in order to avoid sending the data type log)
515	pe_max = log_point_s%sum
516	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, 0, comm2d, ierr )
517	#endif
518
519	ENDIF
520
521	!
522	!-- Write cpu-times
523	IF ( myid == 0 ) THEN
524	!
525	!-- Re-store sums
526	WHERE ( log_point_s%counts /= 0 )
527	sum = log_point_s%sum
528	ELSEWHERE
529	sum = -1.0_dp
530	ENDWHERE
531
532	!
533	!-- Write cpu-times sorted by size
534	WRITE ( 18, 101 )
535	DO
536	ii = MAXLOC( sum )
537	i = ii(1)
538	IF ( sum(i) /= -1.0_dp ) THEN
539	WRITE ( 18, 102 ) log_point_s(i)%place, log_point_s(i)%sum, &
540	log_point_s(i)%sum / log_point(1)%sum * 100.0_dp, &
541	log_point_s(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
542	sum(i) = -1.0_dp
543	ELSE
544	EXIT
545	ENDIF
546	ENDDO
547
548	!
549	!-- Output of handling of MPI operations
550	IF ( collective_wait ) THEN
551	WRITE ( 18, 103 )
552	ELSE
553	WRITE ( 18, 104 )
554	ENDIF
555	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
556	IF ( synchronous_exchange ) THEN
557	WRITE ( 18, 105 )
558	ELSE
559	WRITE ( 18, 106 )
560	ENDIF
561
562	!
563	!-- Empty lines in order to create a gap to the results of the model
564	!-- continuation runs
565	WRITE ( 18, 107 )
566
567	!
568	!-- Unit 18 is not needed anymore
569	CALL close_file( 18 )
570
571	ENDIF
572
573	CALL location_message( 'calculating cpu statistics', 'finished' )
574
575
576	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
577	&') tasks *',I5,' threads):'// &
578	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
579	'nr of timesteps: ',22X,I6/ &
580	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
581
582	101 FORMAT (/'special measures:'/ &
583	&'-----------------------------------------------------------', &
584	&'---------------------')
585
586	102 FORMAT (A25,2X,F9.3,2X,F7.2,1X,I7,2(1X,F9.3),1X,F5.2)
587	103 FORMAT (/'Barriers are set in front of collective operations')
588	104 FORMAT (/'No barriers are set in front of collective operations')
589	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
590	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
591	107 FORMAT (//)
592	110 FORMAT ('------------------------------------------------------------', &
593	&'----------'// &
594	&'place: mean counts ', &
595	&' min max rms'/ &
596	&' sec. % ', &
597	&'sec. sec. sec.'/ &
598	&'-----------------------------------------------------------', &
599	&'---------------------')
600	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
601
602	END SUBROUTINE cpu_statistics
603
604	END MODULE cpulog

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