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source: palm/trunk/SOURCE/cpulog_mod.f90 @ 4570

Last change on this file since 4570 was 4559, checked in by raasch, 4 years ago
files re-formatted to follow the PALM coding standard
Property svn:keywords set to `Id`
File size: 23.1 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 4559 2020-06-11 08:51:48Z gronemeier $
26	! file re-formatted to follow the PALM coding standard
27	!
28	! 4549 2020-05-29 09:27:29Z raasch
29	! bugfix for r4539: values for min/max/rms stored in separate arrays
30	!
31	! 4539 2020-05-18 14:05:17Z raasch
32	! code re-structured,
33	! cpu time per grid point and timestep does not included initialization and spinup any more
34	!
35	! 4536 2020-05-17 17:24:13Z raasch
36	! restart I/O transfer speed added
37	!
38	! 4429 2020-02-27 15:24:30Z raasch
39	! bugfix: cpp-directives added for serial mode
40	!
41	! 4378 2020-01-16 13:22:48Z Giersch
42	! Format of rms output changed to allow values >= 100
43	!
44	! 4360 2020-01-07 11:25:50Z suehring
45	! Corrected "Former revisions" section
46	!
47	! 4015 2019-06-05 13:25:35Z raasch
48	! all reals changed to double precision in order to work with 32-bit working precision, otherwise
49	! calculated time intervals would mostly give zero
50	!
51	! 3885 2019-04-11 11:29:34Z kanani
52	! Changes related to global restructuring of location messages and introduction of additional debug
53	! messages
54	!
55	! 3655 2019-01-07 16:51:22Z knoop
56	! output format limited to a maximum line length of 80
57	!
58	! Revision 1.1 1997/07/24 11:12:29 raasch
59	! Initial revision
60	!
61	!
62	! Description:
63	! ------------
64	!> CPU-time measurements for any program part whatever. Results of the measurements are output at
65	!> the end of the run in local file CPU_MEASURES.
66	!>
67	!> To measure the CPU-time (better to say the wallclock time) of a specific code segment, two calls
68	!> of cpu_log have to be used as brackets in front and at the end of the segment:
69	!>
70	!> CALL cpu_log( log_point(n), 'any identifier', 'start' )
71	!> ... code segment ...
72	!> CALL cpu_log( log_point(n), 'any identifier', 'stop' )
73	!>
74	!> Parts of the code segment can be excluded from the measurement by additional call of cpu_log:
75	!>
76	!> ... first segment to be measured
77	!> CALL cpu_log( log_point(n), 'any identifier', 'pause' )
78	!> ... oart of segment to be excluded from measurement
79	!> CALL cpu_log( log_point(n), 'any identifier', 'continue' )
80	!> ... second segment to be mesasured
81	!>
82	!> n is an INTEGER within the interval [1,100] defining the id of the specific code segment,
83	!> 'any identifier' is a string describing the code segment to be measured. It can be freely chosen
84	!> and results will appear under this name in file CPU_MEASURES. ids can only be used once. If you
85	!> like to do a measurement of a new part of the code, please look for an id which is unused so far.
86	!>
87	!> runtime_parameters-parameter cpu_log_barrierwait can be used to set an MPI barrier at the
88	!> beginning of the measurement (modus 'start' or 'continue'), to avoid that idle times (due to MPI
89	!> calls in the code segment, which are waiting for other processes to be finished) affect the
90	!> measurements.
91	!> If barriers shall not be used at all, a fourth, optional parameter has to be
92	!> given:
93	!>
94	!> CALL cpu_log( ..., ..., 'start', cpu_log_nowait )
95	!>
96	!> Variable log_point should be used for non-overlapping code segments, and they should sum up to
97	!> the total cpu-time required by the complete run.
98	!> Variable log_point_s can be used for any other special (s) measurements.
99	!--------------------------------------------------------------------------------------------------!
100	MODULE cpulog
101
102
103	USE control_parameters, &
104	ONLY: message_string, nr_timesteps_this_run, restart_data_format_output, &
105	restart_file_size, run_description_header, synchronous_exchange, write_binary
106
107	USE indices, &
108	ONLY: ngp_3d, nx, ny, nz
109
110	USE kinds
111
112	USE pegrid
113
114	IMPLICIT NONE
115
116	PRIVATE
117	PUBLIC cpu_log, cpu_log_barrierwait, cpu_log_nowait, cpu_statistics, initial_wallclock_time, &
118	log_point, log_point_s
119
120	INTERFACE cpu_log
121	MODULE PROCEDURE cpu_log
122	END INTERFACE cpu_log
123
124	INTERFACE cpu_statistics
125	MODULE PROCEDURE cpu_statistics
126	END INTERFACE cpu_statistics
127
128	INTEGER(iwp), PARAMETER :: cpu_log_continue = 0 !<
129	INTEGER(iwp), PARAMETER :: cpu_log_pause = 1 !<
130	INTEGER(iwp), PARAMETER :: cpu_log_start = 2 !<
131	INTEGER(iwp), PARAMETER :: cpu_log_stop = 3 !<
132
133	LOGICAL :: cpu_log_barrierwait = .FALSE. !<
134	LOGICAL, PARAMETER :: cpu_log_nowait = .FALSE. !<
135
136	REAL(dp) :: initial_wallclock_time !<
137
138	TYPE logpoint
139	REAL(dp) :: isum !<
140	REAL(dp) :: ivect !<
141	REAL(dp) :: mean !<
142	REAL(dp) :: mtime !<
143	REAL(dp) :: mtimevec !<
144	REAL(dp) :: sum !<
145	REAL(dp) :: vector !<
146	INTEGER(iwp) :: counts !<
147	CHARACTER (LEN=25) :: place !<
148	END TYPE logpoint
149
150	TYPE(logpoint), DIMENSION(100) :: log_point = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
151	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
152	TYPE(logpoint), DIMENSION(100) :: log_point_s = logpoint( 0.0_dp, 0.0_dp, 0.0_dp, 0.0_dp, &
153	0.0_dp, 0.0_dp, 0.0_dp, 0, ' ' )
154
155	SAVE
156
157	CONTAINS
158
159	!------------------------------------------------------------------------------!
160	! Description:
161	! ------------
162	!> @todo Missing subroutine description.
163	!------------------------------------------------------------------------------!
164	SUBROUTINE cpu_log( log_event, place, modus, barrierwait )
165
166	IMPLICIT NONE
167
168	CHARACTER (LEN=*) :: modus !<
169	CHARACTER (LEN=*) :: place !<
170
171	LOGICAL :: wait_allowed !<
172	LOGICAL, OPTIONAL :: barrierwait !<
173	LOGICAL, SAVE :: first = .TRUE. !<
174
175	REAL(dp) :: mtime = 0.0_dp !<
176	REAL(dp) :: mtimevec = 0.0_dp !<
177	TYPE(logpoint) :: log_event !<
178
179	INTEGER(idp) :: count !<
180	INTEGER(idp) :: count_rate !<
181
182
183	!
184	!-- Initialize and check, respectively, point of measurement
185	IF ( log_event%place == ' ' ) THEN
186	log_event%place = place
187	ELSEIF ( log_event%place /= place ) THEN
188	WRITE( message_string, * ) 'wrong argument expected: ', &
189	TRIM(log_event%place), ' given: ', TRIM( place )
190	CALL message( 'cpu_log', 'PA0174', 1, 2, 0, 6, 0 )
191	ENDIF
192
193	!
194	!-- Determine, if barriers are allowed to set
195	IF ( PRESENT( barrierwait ) ) THEN
196	wait_allowed = barrierwait
197	ELSE
198	wait_allowed = .TRUE.
199	ENDIF
200
201	!
202	!-- MPI barrier, if requested, in order to avoid measuring wait times
203	!-- caused by MPI routines waiting for other MPI routines of other
204	!-- PEs that have not yet finished
205	#if defined( __parallel )
206	IF ( cpu_log_barrierwait .AND. wait_allowed .AND. &
207	( modus == 'start' .OR. modus == 'continue' ) ) THEN
208	CALL MPI_BARRIER( comm2d, ierr )
209	ENDIF
210	#endif
211
212	!
213	!-- Take current time
214	CALL SYSTEM_CLOCK( count, count_rate )
215	mtime = REAL( count, KIND=dp ) / REAL( count_rate, KIND=dp )
216
217	!
218	!-- Start, stop or pause measurement
219	IF ( modus == 'start' .OR. modus == 'continue' ) THEN
220	log_event%mtime = mtime
221	log_event%mtimevec = mtimevec
222	ELSEIF ( modus == 'pause' ) THEN
223	IF ( ( mtime - log_event%mtime ) < 0.0 .AND. first ) THEN
224	WRITE( message_string, * ) 'negative time interval occured', &
225	'&PE',myid,' L=PAUSE "',TRIM(log_event%place), &
226	'" new=', mtime,' last=',log_event%mtime
227	CALL message( 'cpu_log', 'PA0176', 0, 1, -1, 6, 0 )
228	first = .FALSE.
229	ENDIF
230	log_event%isum = log_event%isum + mtime - log_event%mtime
231	log_event%ivect = log_event%ivect + mtimevec - log_event%mtimevec
232	ELSEIF ( modus == 'stop' ) THEN
233	IF ( ( mtime - log_event%mtime + log_event%isum ) < 0.0 .AND. first ) THEN
234	WRITE( message_string, * ) 'negative time interval occured', &
235	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" new=', &
236	mtime,' last=',log_event%mtime,' isum=',log_event%isum
237	CALL message( 'cpu_log', 'PA0177', 0, 1, -1, 6, 0 )
238	first = .FALSE.
239	ENDIF
240	log_event%mtime = mtime - log_event%mtime + log_event%isum
241	log_event%mtimevec = mtimevec - log_event%mtimevec + log_event%ivect
242	log_event%sum = log_event%sum + log_event%mtime
243	IF ( log_event%sum < 0.0 .AND. first ) THEN
244	WRITE( message_string, * ) 'negative time interval occured', &
245	'&PE',myid,' L=STOP "',TRIM(log_event%place),'" sum=', &
246	log_event%sum,' mtime=',log_event%mtime
247	CALL message( 'cpu_log', 'PA0178', 0, 1, -1, 6, 0 )
248	first = .FALSE.
249	ENDIF
250	log_event%vector = log_event%vector + log_event%mtimevec
251	log_event%counts = log_event%counts + 1
252	log_event%isum = 0.0_dp
253	log_event%ivect = 0.0_dp
254	ELSE
255	message_string = 'unknown modus of time measurement: ' // TRIM( modus )
256	CALL message( 'cpu_log', 'PA0179', 0, 1, -1, 6, 0 )
257	ENDIF
258
259	END SUBROUTINE cpu_log
260
261
262	!------------------------------------------------------------------------------!
263	! Description:
264	! ------------
265	!> Analysis and output of the cpu-times measured. All PE results are collected
266	!> on PE0 in order to calculate the mean cpu-time over all PEs and other
267	!> statistics. The output is sorted according to the amount of cpu-time consumed
268	!> and output on PE0.
269	!------------------------------------------------------------------------------!
270
271	SUBROUTINE cpu_statistics
272
273	IMPLICIT NONE
274
275	INTEGER(iwp) :: i !<
276	INTEGER(iwp) :: ii(1) !<
277	#if defined( __parallel )
278	INTEGER(iwp) :: iii !<
279	INTEGER(iwp) :: sender !<
280	#endif
281	REAL(dp) :: average_cputime !<
282	REAL(dp), SAVE :: norm = 1.0_dp !<
283	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max !<
284	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_max_s !<
285	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min !<
286	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_min_s !<
287	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms !<
288	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_rms_s !<
289	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp !<
290	REAL(dp), DIMENSION(:), ALLOCATABLE :: pe_tmp_s !<
291	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum !<
292	REAL(dp), DIMENSION(:), ALLOCATABLE :: sum_s !<
293	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points !<
294	REAL(dp), DIMENSION(:,:), ALLOCATABLE :: pe_log_points_s !<
295
296
297	CALL location_message( 'calculating cpu statistics', 'start' )
298
299	!
300	!-- Compute CPU-times in seconds for the global non-overlapping measurements.
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
314	ALLOCATE( pe_max( SIZE( log_point ) ), pe_min( SIZE( log_point ) ), &
315	pe_rms( SIZE( log_point ) ), pe_tmp( SIZE( log_point ) ), &
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
319	pe_rms = 0.0_dp
320	pe_tmp = 0.0_dp
321
322	#if defined( __parallel )
323	!
324	!-- Receive data from all PEs
325	DO i = 1, numprocs-1
326	CALL MPI_RECV( pe_tmp(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, i, i, comm2d, &
327	status, ierr )
328	sender = status(MPI_SOURCE)
329	pe_log_points(:,sender) = pe_tmp
330	ENDDO
331	pe_log_points(:,0) = log_point%sum ! Results from PE0
332	!
333	!-- Calculate mean of all PEs, store it on log_point%sum
334	!-- and find minimum and maximum
335	DO iii = 1, SIZE( log_point )
336	DO i = 1, numprocs-1
337	log_point(iii)%sum = log_point(iii)%sum + pe_log_points(iii,i)
338	pe_min(iii) = MIN( pe_min(iii), pe_log_points(iii,i) )
339	pe_max(iii) = MAX( pe_max(iii), pe_log_points(iii,i) )
340	ENDDO
341	log_point(iii)%sum = log_point(iii)%sum / numprocs
342	!
343	!-- Calculate rms
344	DO i = 0, numprocs-1
345	pe_rms(iii) = pe_rms(iii) + ( pe_log_points(iii,i) - log_point(iii)%sum )**2
346	ENDDO
347	pe_rms(iii) = SQRT( pe_rms(iii) / numprocs )
348	ENDDO
349	ELSE
350	!
351	!-- Send data to PE0 (pe_max is used as temporary storage to send
352	!-- the data in order to avoid sending the data type log)
353	ALLOCATE( pe_max( SIZE( log_point ) ) )
354	pe_max = log_point%sum
355	CALL MPI_SEND( pe_max(1), SIZE( log_point ), MPI_DOUBLE_PRECISION, 0, myid, comm2d, ierr )
356	#endif
357
358	ENDIF
359
360	!
361	!-- The same procedure again for the special measurements.
362	!
363	!-- Compute cpu-times in seconds
364	log_point_s%mtime = log_point_s%mtime / norm
365	log_point_s%sum = log_point_s%sum / norm
366	log_point_s%vector = log_point_s%vector / norm
367	WHERE ( log_point_s%counts /= 0 )
368	log_point_s%mean = log_point_s%sum / log_point_s%counts
369	END WHERE
370
371	!
372	!-- Collect CPU-times from all PEs and calculate statistics
373	#if defined( __parallel )
374	!
375	!-- Set barrier in order to avoid that PE0 receives log_point_s-data
376	!-- while still busy with receiving log_point-data (see above)
377	CALL MPI_BARRIER( comm2d, ierr )
378	#endif
379	IF ( myid == 0 ) THEN
380	!
381	!-- Allocate and initialize temporary arrays needed for statistics
382	ALLOCATE( pe_max_s( SIZE( log_point_s ) ), pe_min_s( SIZE( log_point_s ) ), &
383	pe_rms_s( SIZE( log_point_s ) ), pe_tmp_s( SIZE( log_point_s ) ), &
384	pe_log_points_s( SIZE( log_point_s ), 0:numprocs-1 ) )
385	pe_min_s = log_point_s%sum
386	pe_max_s = log_point_s%sum ! need to be set in case of 1 PE
387	pe_rms_s = 0.0_dp
388
389	#if defined( __parallel )
390	!
391	!-- Receive data from all PEs
392	DO i = 1, numprocs-1
393	CALL MPI_RECV( pe_tmp_s(1), SIZE( log_point_s ), MPI_DOUBLE_PRECISION, &
394	MPI_ANY_SOURCE, MPI_ANY_TAG, comm2d, status, ierr )
395	sender = status(MPI_SOURCE)
396	pe_log_points_s(:,sender) = pe_tmp_s
397	ENDDO
398	pe_log_points_s(:,0) = log_point_s%sum ! Results from PE0
399	!
400	!-- Calculate mean of all PEs, store it on log_point_s%sum
401	!-- and find minimum and maximum
402	DO iii = 1, SIZE( log_point_s )
403	DO i = 1, numprocs-1
404	log_point_s(iii)%sum = log_point_s(iii)%sum + pe_log_points_s(iii,i)
405	pe_min_s(iii) = MIN( pe_min_s(iii), pe_log_points_s(iii,i) )
406	pe_max_s(iii) = MAX( pe_max_s(iii), pe_log_points_s(iii,i) )
407	ENDDO
408	log_point_s(iii)%sum = log_point_s(iii)%sum / numprocs
409	!
410	!-- Calculate rms
411	DO i = 0, numprocs-1
412	pe_rms_s(iii) = pe_rms_s(iii) + ( pe_log_points_s(iii,i) - log_point_s(iii)%sum )**2
413	ENDDO
414	pe_rms_s(iii) = SQRT( pe_rms_s(iii) / numprocs )
415	ENDDO
416	ELSE
417	!
418	!-- Send data to PE0 (pe_max is used as temporary storage to send
419	!-- the data in order to avoid sending the data type log)
420	ALLOCATE( pe_max_s( SIZE( log_point_s ) ) )
421	pe_max_s = log_point_s%sum
422	CALL MPI_SEND( pe_max_s(1), SIZE( log_point_s ), MPI_DOUBLE_PRECISION, 0, 0, comm2d, &
423	ierr )
424	#endif
425
426	ENDIF
427	!
428	!-- Write CPU-times for the non-overlapping measurements.
429	IF ( myid == 0 ) THEN
430	!
431	!-- Re-store sums
432	ALLOCATE( sum( SIZE( log_point ) ) )
433	WHERE ( log_point%counts /= 0 )
434	sum = log_point%sum
435	ELSEWHERE
436	sum = -1.0_dp
437	ENDWHERE
438
439	!
440	!-- Get total time in order to calculate CPU-time per gridpoint and timestep.
441	!-- Time for initialization (2) and spinup (41) are not included here!
442	IF ( nr_timesteps_this_run /= 0 ) THEN
443	average_cputime = log_point_s(10)%sum / REAL( ngp_3d(0), KIND=dp ) / &
444	REAL( nr_timesteps_this_run, KIND=dp ) * 1E6_dp ! in micro-sec
445	ELSE
446	average_cputime = -1.0_dp
447	ENDIF
448
449	!
450	!-- Write cpu-times sorted by size
451	CALL check_open( 18 )
452	#if defined( __parallel )
453	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, &
454	pdims(1), pdims(2), threads_per_task, nx+1, ny+1, nz, &
455	nr_timesteps_this_run, average_cputime
456
457	WRITE ( 18, 110 )
458	#else
459	WRITE ( 18, 100 ) TRIM( run_description_header ), numprocs * threads_per_task, 1, 1, &
460	threads_per_task, nx+1, ny+1, nz, nr_timesteps_this_run, &
461	average_cputime
462
463	WRITE ( 18, 110 )
464	#endif
465	DO
466	ii = MAXLOC( sum )
467	i = ii(1)
468	IF ( sum(i) /= -1.0_dp ) THEN
469	WRITE ( 18, 102 ) log_point(i)%place, log_point(i)%sum, &
470	log_point(i)%sum / log_point(1)%sum * 100.0_dp, &
471	log_point(i)%counts, pe_min(i), pe_max(i), pe_rms(i)
472	sum(i) = -1.0_dp
473	ELSE
474	EXIT
475	ENDIF
476	ENDDO
477	ENDIF
478
479	!
480	!-- Write CPU-times for special measurements.
481	IF ( myid == 0 ) THEN
482	!
483	!-- Re-store sums
484	ALLOCATE( sum_s( SIZE( log_point_s ) ) )
485	WHERE ( log_point_s%counts /= 0 )
486	sum_s = log_point_s%sum
487	ELSEWHERE
488	sum_s = -1.0_dp
489	ENDWHERE
490
491	!
492	!-- Write cpu-times sorted by size
493	WRITE ( 18, 101 )
494	DO
495	ii = MAXLOC( sum_s )
496	i = ii(1)
497	IF ( sum_s(i) /= -1.0_dp ) THEN
498	WRITE ( 18, 102 ) log_point_s(i)%place, log_point_s(i)%sum, &
499	log_point_s(i)%sum / log_point(1)%sum * 100.0_dp, &
500	log_point_s(i)%counts, pe_min_s(i), pe_max_s(i), pe_rms_s(i)
501	sum_s(i) = -1.0_dp
502	ELSE
503	EXIT
504	ENDIF
505	ENDDO
506
507	!
508	!-- Output of handling of MPI operations
509	IF ( collective_wait ) THEN
510	WRITE ( 18, 103 )
511	ELSE
512	WRITE ( 18, 104 )
513	ENDIF
514	IF ( cpu_log_barrierwait ) WRITE ( 18, 111 )
515	IF ( synchronous_exchange ) THEN
516	WRITE ( 18, 105 )
517	ELSE
518	WRITE ( 18, 106 )
519	ENDIF
520	!
521	!-- Output of restart data transfer speed
522	IF ( write_binary .AND. restart_data_format_output(1:3) == 'mpi' ) THEN
523	WRITE ( 18, 107 ) restart_file_size, restart_file_size / log_point(22)%sum
524	ENDIF
525	!
526	!-- Empty lines in order to create a gap to the results from the next restart run
527	WRITE ( 18, 108 )
528
529	!
530	!-- Unit 18 is not needed anymore
531	CALL close_file( 18 )
532
533	ENDIF
534
535	CALL location_message( 'calculating cpu statistics', 'finished' )
536
537
538	100 FORMAT (A/11('-')//'CPU measures for ',I5,' PEs (',I5,'(x) * ',I5,'(y', &
539	&') tasks *',I5,' threads):'// &
540	'gridpoints (x/y/z): ',20X,I5,' * ',I5,' * ',I5/ &
541	'nr of timesteps: ',22X,I6/ &
542	'cpu time per grid point and timestep: ',5X,F8.5,' * 10**-6 s')
543
544	101 FORMAT (/'special measures:'/ &
545	&'-----------------------------------------------------------', &
546	&'---------------------')
547
548	102 FORMAT (A25,2X,F9.3,2X,F7.2,1X,I7,2(1X,F9.3),1X,F6.2)
549	103 FORMAT (/'Barriers are set in front of collective operations')
550	104 FORMAT (/'No barriers are set in front of collective operations')
551	105 FORMAT (/'Exchange of ghostpoints via MPI_SENDRCV')
552	106 FORMAT (/'Exchange of ghostpoints via MPI_ISEND/MPI_IRECV')
553	107 FORMAT (/'Restart file size: ',F12.1,' MByte'/ &
554	&'I/O transfer speed: ',F12.1,' MByte / sec')
555	108 FORMAT (//)
556	110 FORMAT ('------------------------------------------------------------', &
557	&'----------'// &
558	&'place: mean counts ', &
559	&' min max rms'/ &
560	&' sec. % ', &
561	&'sec. sec. sec.'/ &
562	&'-----------------------------------------------------------', &
563	&'---------------------')
564	111 FORMAT (/'Barriers are set at beginning (start/continue) of measurements')
565
566	END SUBROUTINE cpu_statistics
567
568	END MODULE cpulog

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