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source: palm/trunk/SOURCE/cpulog_mod.f90 @ 4752

Last change on this file since 4752 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

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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 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.
8	!
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.
12	!
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/>.
15	!
16	! Copyright 1997-2020 Leibniz Universitaet Hannover
17	!------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! -----------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: cpulog_mod.f90 4665 2020-09-03 14:04:24Z suehring $
26	! Format descriptor 102 slightly modified.
27	!
28	! 4577 2020-06-25 09:53:58Z raasch
29	! further re-formatting concerning Fortran parameter variables
30	!
31	! 4559 2020-06-11 08:51:48Z raasch
32	! file re-formatted to follow the PALM coding standard
33	!
34	! 4549 2020-05-29 09:27:29Z raasch
35	! bugfix for r4539: values for min/max/rms stored in separate arrays
36	!
37	! 4539 2020-05-18 14:05:17Z raasch
38	! code re-structured,
39	! cpu time per grid point and timestep does not included initialization and spinup any more
40	!
41	! 4536 2020-05-17 17:24:13Z raasch
42	! restart I/O transfer speed added
43	!
44	! 4429 2020-02-27 15:24:30Z raasch
45	! bugfix: cpp-directives added for serial mode
46	!
47	! 4378 2020-01-16 13:22:48Z Giersch
48	! Format of rms output changed to allow values >= 100
49	!
50	! 4360 2020-01-07 11:25:50Z suehring
51	! Corrected "Former revisions" section
52	!
53	! 4015 2019-06-05 13:25:35Z raasch
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	!
57	! 3885 2019-04-11 11:29:34Z kanani
58	! Changes related to global restructuring of location messages and introduction of additional debug
59	! messages
60	!
61	! 3655 2019-01-07 16:51:22Z knoop
62	! output format limited to a maximum line length of 80
63	!
64	! Revision 1.1 1997/07/24 11:12:29 raasch
65	! Initial revision
66	!
67	!
68	! Description:
69	! ------------
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.
72	!>
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:
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	!>
80	!> Parts of the code segment can be excluded from the measurement by additional call of cpu_log:
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	!>
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.
92	!>
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.
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 should sum up to
103	!> the total cpu-time required by the complete run.
104	!> Variable log_point_s can be used for any other special (s) measurements.
105	!--------------------------------------------------------------------------------------------------!
106	MODULE cpulog
107
108
109	USE control_parameters, &
110	ONLY: message_string, nr_timesteps_this_run, restart_data_format_output, &
111	restart_file_size, run_description_header, synchronous_exchange, write_binary
112
113	USE indices, &
114	ONLY: ngp_3d, nx, ny, nz
115
116	USE kinds
117
118	USE pegrid
119
120	IMPLICIT NONE
121
122	PRIVATE
123	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, initial_wallclock_time, &
124	log_point, log_point_s
125
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
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 !<
138
139	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
140
141	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
142
143	REAL(dp) :: initial_wallclock_time !<
144
145	TYPE logpoint
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 !<
153	INTEGER(iwp) :: counts !<
154	CHARACTER (LEN=25) :: place !<
155	END TYPE logpoint
156
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, ' ' )
161
162	SAVE
163
164	CONTAINS
165
166	!------------------------------------------------------------------------------!
167	! Description:
168	! ------------
169	!> @todo Missing subroutine description.
170	!------------------------------------------------------------------------------!
171	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
172
173	IMPLICIT NONE
174
175	CHARACTER (LEN=*) :: modus !<
176	CHARACTER (LEN=*) :: place !<
177
178	LOGICAL :: wait_allowed !<
179	LOGICAL, OPTIONAL :: barrierwait !<
180	LOGICAL, SAVE :: first = .TRUE. !<
181
182	REAL(dp) :: mtime = 0.0_dp !<
183	REAL(dp) :: mtimevec = 0.0_dp !<
184	TYPE(logpoint) :: log_event !<
185
186	INTEGER(idp) :: count !<
187	INTEGER(idp) :: count_rate !<
188
189
190	!
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
195	WRITE( message_string, * ) 'wrong argument expected: ', &
196	TRIM(log_event%place), ' given: ', TRIM( place )
197	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
198	ENDIF
199
200	!
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 )
213	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
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 )
222	mtime = REAL( count, KIND=dp ) / REAL( count_rate, KIND=dp )
223
224	!
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
231	WRITE( message_string, * ) 'negative time interval occured', &
232	'&PE',myid,' L=PAUSE "',TRIM(log_event%place), &
233	'" new=', mtime,' last=',log_event%mtime
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
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
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
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
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
259	log_event%isum = 0.0_dp
260	log_event%ivect = 0.0_dp
261	ELSE
262	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
263	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
264	ENDIF
265
266	END SUBROUTINE cpu_log
267
268
269	!------------------------------------------------------------------------------!
270	! Description:
271	! ------------
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.
276	!------------------------------------------------------------------------------!
277
278	SUBROUTINE cpu_statistics
279
280	IMPLICIT NONE
281
282	INTEGER(iwp) :: i !<
283	INTEGER(iwp) :: ii(1) !<
284	#if defined( __parallel )
285	INTEGER(iwp) :: iii !<
286	INTEGER(iwp) :: sender !<
287	#endif
288	REAL(dp) :: average_cputime !<
289	REAL(dp), SAVE :: norm = 1.0_dp !<
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 !<
302
303
304	CALL location_message( 'calculating cpu statistics', 'start' )
305
306	!
307	!-- Compute CPU-times in seconds for the global non-overlapping measurements.
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	!
317	!-- Collect CPU-times from all PEs and calculate statistics
318	IF ( myid == 0 ) THEN
319	!
320	!-- Allocate and initialize temporary arrays needed for statistics
321	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
322	pe_rms( SIZE( log_point ) ), pe_tmp( SIZE( log_point ) ), &
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
326	pe_rms = 0.0_dp
327	pe_tmp = 0.0_dp
328
329	#if defined( __parallel )
330	!
331	!-- Receive data from all PEs
332	DO i = 1, numprocs-1
333	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, i, i, comm2d, &
334	status, ierr )
335	sender = status(MPI_SOURCE)
336	pe_log_points(:,sender) = pe_tmp
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
352	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point(iii)%sum )**2
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
362	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, myid, comm2d, ierr )
363	#endif
364
365	ENDIF
366
367	!
368	!-- The same procedure again for the special measurements.
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	!
379	!-- Collect CPU-times from all PEs and calculate statistics
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	!
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
395
396	#if defined( __parallel )
397	!
398	!-- Receive data from all PEs
399	DO i = 1, numprocs-1
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 )
402	sender = status(MPI_SOURCE)
403	pe_log_points_s(:,sender) = pe_tmp_s
404	ENDDO
405	pe_log_points_s(:,0) = log_point_s%sum ! Results from PE0
406	!
407	!-- Calculate mean of all PEs, store it on log_point_s%sum
408	!-- and find minimum and maximum
409	DO iii = 1, SIZE( log_point_s )
410	DO i = 1, numprocs-1
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) )
414	ENDDO
415	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
416	!
417	!-- Calculate rms
418	DO i = 0, numprocs-1
419	pe_rms_s(iii) = pe_rms_s(iii) + ( pe_log_points_s(iii,i) - log_point_s(iii)%sum )**2
420	ENDDO
421	pe_rms_s(iii) = SQRT( pe_rms_s(iii) / numprocs )
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)
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 )
431	#endif
432
433	ENDIF
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
445
446	!
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.
488	IF ( myid == 0 ) THEN
489	!
490	!-- Re-store sums
491	ALLOCATE( sum_s( SIZE( log_point_s ) ) )
492	WHERE ( log_point_s%counts /= 0 )
493	sum_s = log_point_s%sum
494	ELSEWHERE
495	sum_s = -1.0_dp
496	ENDWHERE
497
498	!
499	!-- Write cpu-times sorted by size
500	WRITE ( 18, 101 )
501	DO
502	ii = MAXLOC( sum_s )
503	i = ii(1)
504	IF ( sum_s(i) /= -1.0_dp ) THEN
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, &
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
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	!
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 )
535
536	!
537	!-- Unit 18 is not needed anymore
538	CALL close_file( 18 )
539
540	ENDIF
541
542	CALL location_message( 'calculating cpu statistics', 'finished' )
543
544
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/ &
549	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
550
551	101 FORMAT (/'special measures:'/ &
552	&'-----------------------------------------------------------', &
553	&'---------------------')
554
555	102 FORMAT (A25,2X,F10.3,2X,F7.2,1X,I7,2(1X,F10.3),1X,F6.2)
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')
560	107 FORMAT (/'Restart file size: ',F12.1,' MByte'/ &
561	&'I/O transfer speed: ',F12.1,' MByte / sec')
562	108 FORMAT (//)
563	110 FORMAT ('------------------------------------------------------------', &
564	&'----------'// &
565	&'place: mean counts ', &
566	&' min max rms'/ &
567	&' sec. % ', &
568	&'sec. sec. sec.'/ &
569	&'-----------------------------------------------------------', &
570	&'---------------------')
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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