summaryrefslogtreecommitdiff
path: root/tools/power/pm-graph/analyze_boot.py
blob: e83df141a59765b2db300ffd1cc0066a329f00f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
#!/usr/bin/python
#
# Tool for analyzing boot timing
# Copyright (c) 2013, Intel Corporation.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms and conditions of the GNU General Public License,
# version 2, as published by the Free Software Foundation.
#
# This program is distributed in the hope it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# Authors:
#	 Todd Brandt <todd.e.brandt@linux.intel.com>
#
# Description:
#	 This tool is designed to assist kernel and OS developers in optimizing
#	 their linux stack's boot time. It creates an html representation of
#	 the kernel boot timeline up to the start of the init process.
#

# ----------------- LIBRARIES --------------------

import sys
import time
import os
import string
import re
import platform
import shutil
from datetime import datetime, timedelta
from subprocess import call, Popen, PIPE
import analyze_suspend as aslib

# ----------------- CLASSES --------------------

# Class: SystemValues
# Description:
#	 A global, single-instance container used to
#	 store system values and test parameters
class SystemValues(aslib.SystemValues):
	title = 'BootGraph'
	version = '2.1'
	hostname = 'localhost'
	testtime = ''
	kernel = ''
	dmesgfile = ''
	ftracefile = ''
	htmlfile = 'bootgraph.html'
	outfile = ''
	testdir = ''
	testdirprefix = 'boot'
	embedded = False
	testlog = False
	dmesglog = False
	ftracelog = False
	useftrace = False
	usecallgraph = False
	usedevsrc = True
	suspendmode = 'boot'
	max_graph_depth = 2
	graph_filter = 'do_one_initcall'
	reboot = False
	manual = False
	iscronjob = False
	timeformat = '%.6f'
	bootloader = 'grub'
	blexec = []
	def __init__(self):
		if('LOG_FILE' in os.environ and 'TEST_RESULTS_IDENTIFIER' in os.environ):
			self.embedded = True
			self.dmesglog = True
			self.outfile = os.environ['LOG_FILE']
			self.htmlfile = os.environ['LOG_FILE']
		self.hostname = platform.node()
		self.testtime = datetime.now().strftime('%Y-%m-%d_%H:%M:%S')
		if os.path.exists('/proc/version'):
			fp = open('/proc/version', 'r')
			val = fp.read().strip()
			fp.close()
			self.kernel = self.kernelVersion(val)
		else:
			self.kernel = 'unknown'
		self.testdir = datetime.now().strftime('boot-%y%m%d-%H%M%S')
	def kernelVersion(self, msg):
		return msg.split()[2]
	def checkFtraceKernelVersion(self):
		val = tuple(map(int, self.kernel.split('-')[0].split('.')))
		if val >= (4, 10, 0):
			return True
		return False
	def kernelParams(self):
		cmdline = 'initcall_debug log_buf_len=32M'
		if self.useftrace:
			if self.cpucount > 0:
				bs = min(self.memtotal / 2, 2*1024*1024) / self.cpucount
			else:
				bs = 131072
			cmdline += ' trace_buf_size=%dK trace_clock=global '\
			'trace_options=nooverwrite,funcgraph-abstime,funcgraph-cpu,'\
			'funcgraph-duration,funcgraph-proc,funcgraph-tail,'\
			'nofuncgraph-overhead,context-info,graph-time '\
			'ftrace=function_graph '\
			'ftrace_graph_max_depth=%d '\
			'ftrace_graph_filter=%s' % \
				(bs, self.max_graph_depth, self.graph_filter)
		return cmdline
	def setGraphFilter(self, val):
		master = self.getBootFtraceFilterFunctions()
		fs = ''
		for i in val.split(','):
			func = i.strip()
			if func == '':
				doError('badly formatted filter function string')
			if '[' in func or ']' in func:
				doError('loadable module functions not allowed - "%s"' % func)
			if ' ' in func:
				doError('spaces found in filter functions - "%s"' % func)
			if func not in master:
				doError('function "%s" not available for ftrace' % func)
			if not fs:
				fs = func
			else:
				fs += ','+func
		if not fs:
			doError('badly formatted filter function string')
		self.graph_filter = fs
	def getBootFtraceFilterFunctions(self):
		self.rootCheck(True)
		fp = open(self.tpath+'available_filter_functions')
		fulllist = fp.read().split('\n')
		fp.close()
		list = []
		for i in fulllist:
			if not i or ' ' in i or '[' in i or ']' in i:
				continue
			list.append(i)
		return list
	def myCronJob(self, line):
		if '@reboot' not in line:
			return False
		if 'bootgraph' in line or 'analyze_boot.py' in line or '-cronjob' in line:
			return True
		return False
	def cronjobCmdString(self):
		cmdline = '%s -cronjob' % os.path.abspath(sys.argv[0])
		args = iter(sys.argv[1:])
		for arg in args:
			if arg in ['-h', '-v', '-cronjob', '-reboot']:
				continue
			elif arg in ['-o', '-dmesg', '-ftrace', '-func']:
				args.next()
				continue
			cmdline += ' '+arg
		if self.graph_filter != 'do_one_initcall':
			cmdline += ' -func "%s"' % self.graph_filter
		cmdline += ' -o "%s"' % os.path.abspath(self.testdir)
		return cmdline
	def manualRebootRequired(self):
		cmdline = self.kernelParams()
		print 'To generate a new timeline manually, follow these steps:\n'
		print '1. Add the CMDLINE string to your kernel command line.'
		print '2. Reboot the system.'
		print '3. After reboot, re-run this tool with the same arguments but no command (w/o -reboot or -manual).\n'
		print 'CMDLINE="%s"' % cmdline
		sys.exit()
	def getExec(self, cmd):
		dirlist = ['/sbin', '/bin', '/usr/sbin', '/usr/bin',
			'/usr/local/sbin', '/usr/local/bin']
		for path in dirlist:
			cmdfull = os.path.join(path, cmd)
			if os.path.exists(cmdfull):
				return cmdfull
		return ''
	def blGrub(self):
		blcmd = ''
		for cmd in ['update-grub', 'grub-mkconfig', 'grub2-mkconfig']:
			if blcmd:
				break
			blcmd = self.getExec(cmd)
		if not blcmd:
			doError('[GRUB] missing update command')
		if not os.path.exists('/etc/default/grub'):
			doError('[GRUB] missing /etc/default/grub')
		if 'grub2' in blcmd:
			cfg = '/boot/grub2/grub.cfg'
		else:
			cfg = '/boot/grub/grub.cfg'
		if not os.path.exists(cfg):
			doError('[GRUB] missing %s' % cfg)
		if 'update-grub' in blcmd:
			self.blexec = [blcmd]
		else:
			self.blexec = [blcmd, '-o', cfg]
	def getBootLoader(self):
		if self.bootloader == 'grub':
			self.blGrub()
		else:
			doError('unknown boot loader: %s' % self.bootloader)

sysvals = SystemValues()

# Class: Data
# Description:
#	 The primary container for test data.
class Data(aslib.Data):
	dmesg = {}  # root data structure
	start = 0.0 # test start
	end = 0.0   # test end
	dmesgtext = []   # dmesg text file in memory
	testnumber = 0
	idstr = ''
	html_device_id = 0
	valid = False
	tUserMode = 0.0
	boottime = ''
	phases = ['kernel', 'user']
	do_one_initcall = False
	def __init__(self, num):
		self.testnumber = num
		self.idstr = 'a'
		self.dmesgtext = []
		self.dmesg = {
			'kernel': {'list': dict(), 'start': -1.0, 'end': -1.0, 'row': 0,
				'order': 0, 'color': 'linear-gradient(to bottom, #fff, #bcf)'},
			'user': {'list': dict(), 'start': -1.0, 'end': -1.0, 'row': 0,
				'order': 1, 'color': '#fff'}
		}
	def deviceTopology(self):
		return ''
	def newAction(self, phase, name, pid, start, end, ret, ulen):
		# new device callback for a specific phase
		self.html_device_id += 1
		devid = '%s%d' % (self.idstr, self.html_device_id)
		list = self.dmesg[phase]['list']
		length = -1.0
		if(start >= 0 and end >= 0):
			length = end - start
		i = 2
		origname = name
		while(name in list):
			name = '%s[%d]' % (origname, i)
			i += 1
		list[name] = {'name': name, 'start': start, 'end': end,
			'pid': pid, 'length': length, 'row': 0, 'id': devid,
			'ret': ret, 'ulen': ulen }
		return name
	def deviceMatch(self, pid, cg):
		if cg.end - cg.start == 0:
			return True
		for p in data.phases:
			list = self.dmesg[p]['list']
			for devname in list:
				dev = list[devname]
				if pid != dev['pid']:
					continue
				if cg.name == 'do_one_initcall':
					if(cg.start <= dev['start'] and cg.end >= dev['end'] and dev['length'] > 0):
						dev['ftrace'] = cg
						self.do_one_initcall = True
						return True
				else:
					if(cg.start > dev['start'] and cg.end < dev['end']):
						if 'ftraces' not in dev:
							dev['ftraces'] = []
						dev['ftraces'].append(cg)
						return True
		return False

# ----------------- FUNCTIONS --------------------

# Function: parseKernelLog
# Description:
#	 parse a kernel log for boot data
def parseKernelLog():
	phase = 'kernel'
	data = Data(0)
	data.dmesg['kernel']['start'] = data.start = ktime = 0.0
	sysvals.stamp = {
		'time': datetime.now().strftime('%B %d %Y, %I:%M:%S %p'),
		'host': sysvals.hostname,
		'mode': 'boot', 'kernel': ''}

	tp = aslib.TestProps()
	devtemp = dict()
	if(sysvals.dmesgfile):
		lf = open(sysvals.dmesgfile, 'r')
	else:
		lf = Popen('dmesg', stdout=PIPE).stdout
	for line in lf:
		line = line.replace('\r\n', '')
		# grab the stamp and sysinfo
		if re.match(tp.stampfmt, line):
			tp.stamp = line
			continue
		elif re.match(tp.sysinfofmt, line):
			tp.sysinfo = line
			continue
		idx = line.find('[')
		if idx > 1:
			line = line[idx:]
		m = re.match('[ \t]*(\[ *)(?P<ktime>[0-9\.]*)(\]) (?P<msg>.*)', line)
		if(not m):
			continue
		ktime = float(m.group('ktime'))
		if(ktime > 120):
			break
		msg = m.group('msg')
		data.dmesgtext.append(line)
		if(ktime == 0.0 and re.match('^Linux version .*', msg)):
			if(not sysvals.stamp['kernel']):
				sysvals.stamp['kernel'] = sysvals.kernelVersion(msg)
			continue
		m = re.match('.* setting system clock to (?P<t>.*) UTC.*', msg)
		if(m):
			bt = datetime.strptime(m.group('t'), '%Y-%m-%d %H:%M:%S')
			bt = bt - timedelta(seconds=int(ktime))
			data.boottime = bt.strftime('%Y-%m-%d_%H:%M:%S')
			sysvals.stamp['time'] = bt.strftime('%B %d %Y, %I:%M:%S %p')
			continue
		m = re.match('^calling *(?P<f>.*)\+.* @ (?P<p>[0-9]*)', msg)
		if(m):
			func = m.group('f')
			pid = int(m.group('p'))
			devtemp[func] = (ktime, pid)
			continue
		m = re.match('^initcall *(?P<f>.*)\+.* returned (?P<r>.*) after (?P<t>.*) usecs', msg)
		if(m):
			data.valid = True
			data.end = ktime
			f, r, t = m.group('f', 'r', 't')
			if(f in devtemp):
				start, pid = devtemp[f]
				data.newAction(phase, f, pid, start, ktime, int(r), int(t))
				del devtemp[f]
			continue
		if(re.match('^Freeing unused kernel memory.*', msg)):
			data.tUserMode = ktime
			data.dmesg['kernel']['end'] = ktime
			data.dmesg['user']['start'] = ktime
			phase = 'user'

	if tp.stamp:
		sysvals.stamp = 0
		tp.parseStamp(data, sysvals)
	data.dmesg['user']['end'] = data.end
	lf.close()
	return data

# Function: parseTraceLog
# Description:
#	 Check if trace is available and copy to a temp file
def parseTraceLog(data):
	# parse the trace log
	ftemp = dict()
	tp = aslib.TestProps()
	tp.setTracerType('function_graph')
	tf = open(sysvals.ftracefile, 'r')
	for line in tf:
		if line[0] == '#':
			continue
		m = re.match(tp.ftrace_line_fmt, line.strip())
		if(not m):
			continue
		m_time, m_proc, m_pid, m_msg, m_dur = \
			m.group('time', 'proc', 'pid', 'msg', 'dur')
		if float(m_time) > data.end:
			break
		if(m_time and m_pid and m_msg):
			t = aslib.FTraceLine(m_time, m_msg, m_dur)
			pid = int(m_pid)
		else:
			continue
		if t.fevent or t.fkprobe:
			continue
		key = (m_proc, pid)
		if(key not in ftemp):
			ftemp[key] = []
			ftemp[key].append(aslib.FTraceCallGraph(pid))
		cg = ftemp[key][-1]
		if(cg.addLine(t)):
			ftemp[key].append(aslib.FTraceCallGraph(pid))
	tf.close()

	# add the callgraph data to the device hierarchy
	for key in ftemp:
		proc, pid = key
		for cg in ftemp[key]:
			if len(cg.list) < 1 or cg.invalid:
				continue
			if(not cg.postProcess()):
				print('Sanity check failed for %s-%d' % (proc, pid))
				continue
			# match cg data to devices
			if not data.deviceMatch(pid, cg):
				print ' BAD: %s %s-%d [%f - %f]' % (cg.name, proc, pid, cg.start, cg.end)

# Function: retrieveLogs
# Description:
#	 Create copies of dmesg and/or ftrace for later processing
def retrieveLogs():
	# check ftrace is configured first
	if sysvals.useftrace:
		tracer = sysvals.fgetVal('current_tracer').strip()
		if tracer != 'function_graph':
			doError('ftrace not configured for a boot callgraph')
	# create the folder and get dmesg
	sysvals.systemInfo(aslib.dmidecode(sysvals.mempath))
	sysvals.initTestOutput('boot')
	sysvals.writeDatafileHeader(sysvals.dmesgfile)
	call('dmesg >> '+sysvals.dmesgfile, shell=True)
	if not sysvals.useftrace:
		return
	# get ftrace
	sysvals.writeDatafileHeader(sysvals.ftracefile)
	call('cat '+sysvals.tpath+'trace >> '+sysvals.ftracefile, shell=True)

# Function: colorForName
# Description:
#	 Generate a repeatable color from a list for a given name
def colorForName(name):
	list = [
		('c1', '#ec9999'),
		('c2', '#ffc1a6'),
		('c3', '#fff0a6'),
		('c4', '#adf199'),
		('c5', '#9fadea'),
		('c6', '#a699c1'),
		('c7', '#ad99b4'),
		('c8', '#eaffea'),
		('c9', '#dcecfb'),
		('c10', '#ffffea')
	]
	i = 0
	total = 0
	count = len(list)
	while i < len(name):
		total += ord(name[i])
		i += 1
	return list[total % count]

def cgOverview(cg, minlen):
	stats = dict()
	large = []
	for l in cg.list:
		if l.fcall and l.depth == 1:
			if l.length >= minlen:
				large.append(l)
			if l.name not in stats:
				stats[l.name] = [0, 0.0]
			stats[l.name][0] += (l.length * 1000.0)
			stats[l.name][1] += 1
	return (large, stats)

# Function: createBootGraph
# Description:
#	 Create the output html file from the resident test data
# Arguments:
#	 testruns: array of Data objects from parseKernelLog or parseTraceLog
# Output:
#	 True if the html file was created, false if it failed
def createBootGraph(data):
	# html function templates
	html_srccall = '<div id={6} title="{5}" class="srccall" style="left:{1}%;top:{2}px;height:{3}px;width:{4}%;line-height:{3}px;">{0}</div>\n'
	html_timetotal = '<table class="time1">\n<tr>'\
		'<td class="blue">Init process starts @ <b>{0} ms</b></td>'\
		'<td class="blue">Last initcall ends @ <b>{1} ms</b></td>'\
		'</tr>\n</table>\n'

	# device timeline
	devtl = aslib.Timeline(100, 20)

	# write the test title and general info header
	devtl.createHeader(sysvals)

	# Generate the header for this timeline
	t0 = data.start
	tMax = data.end
	tTotal = tMax - t0
	if(tTotal == 0):
		print('ERROR: No timeline data')
		return False
	user_mode = '%.0f'%(data.tUserMode*1000)
	last_init = '%.0f'%(tTotal*1000)
	devtl.html += html_timetotal.format(user_mode, last_init)

	# determine the maximum number of rows we need to draw
	devlist = []
	for p in data.phases:
		list = data.dmesg[p]['list']
		for devname in list:
			d = aslib.DevItem(0, p, list[devname])
			devlist.append(d)
		devtl.getPhaseRows(devlist, 0, 'start')
	devtl.calcTotalRows()

	# draw the timeline background
	devtl.createZoomBox()
	devtl.html += devtl.html_tblock.format('boot', '0', '100', devtl.scaleH)
	for p in data.phases:
		phase = data.dmesg[p]
		length = phase['end']-phase['start']
		left = '%.3f' % (((phase['start']-t0)*100.0)/tTotal)
		width = '%.3f' % ((length*100.0)/tTotal)
		devtl.html += devtl.html_phase.format(left, width, \
			'%.3f'%devtl.scaleH, '%.3f'%devtl.bodyH, \
			phase['color'], '')

	# draw the device timeline
	num = 0
	devstats = dict()
	for phase in data.phases:
		list = data.dmesg[phase]['list']
		for devname in sorted(list):
			cls, color = colorForName(devname)
			dev = list[devname]
			info = '@|%.3f|%.3f|%.3f|%d' % (dev['start']*1000.0, dev['end']*1000.0,
				dev['ulen']/1000.0, dev['ret'])
			devstats[dev['id']] = {'info':info}
			dev['color'] = color
			height = devtl.phaseRowHeight(0, phase, dev['row'])
			top = '%.6f' % ((dev['row']*height) + devtl.scaleH)
			left = '%.6f' % (((dev['start']-t0)*100)/tTotal)
			width = '%.6f' % (((dev['end']-dev['start'])*100)/tTotal)
			length = ' (%0.3f ms) ' % ((dev['end']-dev['start'])*1000)
			devtl.html += devtl.html_device.format(dev['id'],
				devname+length+phase+'_mode', left, top, '%.3f'%height,
				width, devname, ' '+cls, '')
			rowtop = devtl.phaseRowTop(0, phase, dev['row'])
			height = '%.6f' % (devtl.rowH / 2)
			top = '%.6f' % (rowtop + devtl.scaleH + (devtl.rowH / 2))
			if data.do_one_initcall:
				if('ftrace' not in dev):
					continue
				cg = dev['ftrace']
				large, stats = cgOverview(cg, 0.001)
				devstats[dev['id']]['fstat'] = stats
				for l in large:
					left = '%f' % (((l.time-t0)*100)/tTotal)
					width = '%f' % (l.length*100/tTotal)
					title = '%s (%0.3fms)' % (l.name, l.length * 1000.0)
					devtl.html += html_srccall.format(l.name, left,
						top, height, width, title, 'x%d'%num)
					num += 1
				continue
			if('ftraces' not in dev):
				continue
			for cg in dev['ftraces']:
				left = '%f' % (((cg.start-t0)*100)/tTotal)
				width = '%f' % ((cg.end-cg.start)*100/tTotal)
				cglen = (cg.end - cg.start) * 1000.0
				title = '%s (%0.3fms)' % (cg.name, cglen)
				cg.id = 'x%d' % num
				devtl.html += html_srccall.format(cg.name, left,
					top, height, width, title, dev['id']+cg.id)
				num += 1

	# draw the time scale, try to make the number of labels readable
	devtl.createTimeScale(t0, tMax, tTotal, 'boot')
	devtl.html += '</div>\n'

	# timeline is finished
	devtl.html += '</div>\n</div>\n'

	# draw a legend which describes the phases by color
	devtl.html += '<div class="legend">\n'
	pdelta = 20.0
	pmargin = 36.0
	for phase in data.phases:
		order = '%.2f' % ((data.dmesg[phase]['order'] * pdelta) + pmargin)
		devtl.html += devtl.html_legend.format(order, \
			data.dmesg[phase]['color'], phase+'_mode', phase[0])
	devtl.html += '</div>\n'

	if(sysvals.outfile == sysvals.htmlfile):
		hf = open(sysvals.htmlfile, 'a')
	else:
		hf = open(sysvals.htmlfile, 'w')

	# add the css if this is not an embedded run
	extra = '\
		.c1 {background:rgba(209,0,0,0.4);}\n\
		.c2 {background:rgba(255,102,34,0.4);}\n\
		.c3 {background:rgba(255,218,33,0.4);}\n\
		.c4 {background:rgba(51,221,0,0.4);}\n\
		.c5 {background:rgba(17,51,204,0.4);}\n\
		.c6 {background:rgba(34,0,102,0.4);}\n\
		.c7 {background:rgba(51,0,68,0.4);}\n\
		.c8 {background:rgba(204,255,204,0.4);}\n\
		.c9 {background:rgba(169,208,245,0.4);}\n\
		.c10 {background:rgba(255,255,204,0.4);}\n\
		.vt {transform:rotate(-60deg);transform-origin:0 0;}\n\
		table.fstat {table-layout:fixed;padding:150px 15px 0 0;font-size:10px;column-width:30px;}\n\
		.fstat th {width:55px;}\n\
		.fstat td {text-align:left;width:35px;}\n\
		.srccall {position:absolute;font-size:10px;z-index:7;overflow:hidden;color:black;text-align:center;white-space:nowrap;border-radius:5px;border:1px solid black;background:linear-gradient(to bottom right,#CCC,#969696);}\n\
		.srccall:hover {color:white;font-weight:bold;border:1px solid white;}\n'
	if(not sysvals.embedded):
		aslib.addCSS(hf, sysvals, 1, False, extra)

	# write the device timeline
	hf.write(devtl.html)

	# add boot specific html
	statinfo = 'var devstats = {\n'
	for n in sorted(devstats):
		statinfo += '\t"%s": [\n\t\t"%s",\n' % (n, devstats[n]['info'])
		if 'fstat' in devstats[n]:
			funcs = devstats[n]['fstat']
			for f in sorted(funcs, key=funcs.get, reverse=True):
				if funcs[f][0] < 0.01 and len(funcs) > 10:
					break
				statinfo += '\t\t"%f|%s|%d",\n' % (funcs[f][0], f, funcs[f][1])
		statinfo += '\t],\n'
	statinfo += '};\n'
	html = \
		'<div id="devicedetailtitle"></div>\n'\
		'<div id="devicedetail" style="display:none;">\n'\
		'<div id="devicedetail0">\n'
	for p in data.phases:
		phase = data.dmesg[p]
		html += devtl.html_phaselet.format(p+'_mode', '0', '100', phase['color'])
	html += '</div>\n</div>\n'\
		'<script type="text/javascript">\n'+statinfo+\
		'</script>\n'
	hf.write(html)

	# add the callgraph html
	if(sysvals.usecallgraph):
		aslib.addCallgraphs(sysvals, hf, data)

	# add the dmesg log as a hidden div
	if sysvals.dmesglog:
		hf.write('<div id="dmesglog" style="display:none;">\n')
		for line in data.dmesgtext:
			line = line.replace('<', '&lt').replace('>', '&gt')
			hf.write(line)
		hf.write('</div>\n')

	if(not sysvals.embedded):
		# write the footer and close
		aslib.addScriptCode(hf, [data])
		hf.write('</body>\n</html>\n')
	else:
		# embedded out will be loaded in a page, skip the js
		hf.write('<div id=bounds style=display:none>%f,%f</div>' % \
			(data.start*1000, data.end*1000))
	hf.close()
	return True

# Function: updateCron
# Description:
#    (restore=False) Set the tool to run automatically on reboot
#    (restore=True) Restore the original crontab
def updateCron(restore=False):
	if not restore:
		sysvals.rootUser(True)
	crondir = '/var/spool/cron/crontabs/'
	if not os.path.exists(crondir):
		crondir = '/var/spool/cron/'
	if not os.path.exists(crondir):
		doError('%s not found' % crondir)
	cronfile = crondir+'root'
	backfile = crondir+'root-analyze_boot-backup'
	cmd = sysvals.getExec('crontab')
	if not cmd:
		doError('crontab not found')
	# on restore: move the backup cron back into place
	if restore:
		if os.path.exists(backfile):
			shutil.move(backfile, cronfile)
			call([cmd, cronfile])
		return
	# backup current cron and install new one with reboot
	if os.path.exists(cronfile):
		shutil.move(cronfile, backfile)
	else:
		fp = open(backfile, 'w')
		fp.close()
	res = -1
	try:
		fp = open(backfile, 'r')
		op = open(cronfile, 'w')
		for line in fp:
			if not sysvals.myCronJob(line):
				op.write(line)
				continue
		fp.close()
		op.write('@reboot python %s\n' % sysvals.cronjobCmdString())
		op.close()
		res = call([cmd, cronfile])
	except Exception, e:
		print 'Exception: %s' % str(e)
		shutil.move(backfile, cronfile)
		res = -1
	if res != 0:
		doError('crontab failed')

# Function: updateGrub
# Description:
#	 update grub.cfg for all kernels with our parameters
def updateGrub(restore=False):
	# call update-grub on restore
	if restore:
		try:
			call(sysvals.blexec, stderr=PIPE, stdout=PIPE,
				env={'PATH': '.:/sbin:/usr/sbin:/usr/bin:/sbin:/bin'})
		except Exception, e:
			print 'Exception: %s\n' % str(e)
		return
	# extract the option and create a grub config without it
	sysvals.rootUser(True)
	tgtopt = 'GRUB_CMDLINE_LINUX_DEFAULT'
	cmdline = ''
	grubfile = '/etc/default/grub'
	tempfile = '/etc/default/grub.analyze_boot'
	shutil.move(grubfile, tempfile)
	res = -1
	try:
		fp = open(tempfile, 'r')
		op = open(grubfile, 'w')
		cont = False
		for line in fp:
			line = line.strip()
			if len(line) == 0 or line[0] == '#':
				continue
			opt = line.split('=')[0].strip()
			if opt == tgtopt:
				cmdline = line.split('=', 1)[1].strip('\\')
				if line[-1] == '\\':
					cont = True
			elif cont:
				cmdline += line.strip('\\')
				if line[-1] != '\\':
					cont = False
			else:
				op.write('%s\n' % line)
		fp.close()
		# if the target option value is in quotes, strip them
		sp = '"'
		val = cmdline.strip()
		if val and (val[0] == '\'' or val[0] == '"'):
			sp = val[0]
			val = val.strip(sp)
		cmdline = val
		# append our cmd line options
		if len(cmdline) > 0:
			cmdline += ' '
		cmdline += sysvals.kernelParams()
		# write out the updated target option
		op.write('\n%s=%s%s%s\n' % (tgtopt, sp, cmdline, sp))
		op.close()
		res = call(sysvals.blexec)
		os.remove(grubfile)
	except Exception, e:
		print 'Exception: %s' % str(e)
		res = -1
	# cleanup
	shutil.move(tempfile, grubfile)
	if res != 0:
		doError('update grub failed')

# Function: updateKernelParams
# Description:
#	 update boot conf for all kernels with our parameters
def updateKernelParams(restore=False):
	# find the boot loader
	sysvals.getBootLoader()
	if sysvals.bootloader == 'grub':
		updateGrub(restore)

# Function: doError Description:
#	 generic error function for catastrphic failures
# Arguments:
#	 msg: the error message to print
#	 help: True if printHelp should be called after, False otherwise
def doError(msg, help=False):
	if help == True:
		printHelp()
	print 'ERROR: %s\n' % msg
	sys.exit()

# Function: printHelp
# Description:
#	 print out the help text
def printHelp():
	print('')
	print('%s v%s' % (sysvals.title, sysvals.version))
	print('Usage: bootgraph <options> <command>')
	print('')
	print('Description:')
	print('  This tool reads in a dmesg log of linux kernel boot and')
	print('  creates an html representation of the boot timeline up to')
	print('  the start of the init process.')
	print('')
	print('  If no specific command is given the tool reads the current dmesg')
	print('  and/or ftrace log and creates a timeline')
	print('')
	print('  Generates output files in subdirectory: boot-yymmdd-HHMMSS')
	print('   HTML output:                    <hostname>_boot.html')
	print('   raw dmesg output:               <hostname>_boot_dmesg.txt')
	print('   raw ftrace output:              <hostname>_boot_ftrace.txt')
	print('')
	print('Options:')
	print('  -h            Print this help text')
	print('  -v            Print the current tool version')
	print('  -addlogs      Add the dmesg log to the html output')
	print('  -o name       Overrides the output subdirectory name when running a new test')
	print('                default: boot-{date}-{time}')
	print(' [advanced]')
	print('  -f            Use ftrace to add function detail (default: disabled)')
	print('  -callgraph    Add callgraph detail, can be very large (default: disabled)')
	print('  -maxdepth N   limit the callgraph data to N call levels (default: 2)')
	print('  -mincg ms     Discard all callgraphs shorter than ms milliseconds (e.g. 0.001 for us)')
	print('  -timeprec N   Number of significant digits in timestamps (0:S, 3:ms, [6:us])')
	print('  -expandcg     pre-expand the callgraph data in the html output (default: disabled)')
	print('  -func list    Limit ftrace to comma-delimited list of functions (default: do_one_initcall)')
	print('  -cgfilter S   Filter the callgraph output in the timeline')
	print('  -bl name      Use the following boot loader for kernel params (default: grub)')
	print('  -reboot       Reboot the machine automatically and generate a new timeline')
	print('  -manual       Show the steps to generate a new timeline manually (used with -reboot)')
	print('')
	print('Other commands:')
	print('  -flistall     Print all functions capable of being captured in ftrace')
	print('  -sysinfo      Print out system info extracted from BIOS')
	print(' [redo]')
	print('  -dmesg file   Create HTML output using dmesg input (used with -ftrace)')
	print('  -ftrace file  Create HTML output using ftrace input (used with -dmesg)')
	print('')
	return True

# ----------------- MAIN --------------------
# exec start (skipped if script is loaded as library)
if __name__ == '__main__':
	# loop through the command line arguments
	cmd = ''
	testrun = True
	simplecmds = ['-sysinfo', '-kpupdate', '-flistall', '-checkbl']
	args = iter(sys.argv[1:])
	for arg in args:
		if(arg == '-h'):
			printHelp()
			sys.exit()
		elif(arg == '-v'):
			print("Version %s" % sysvals.version)
			sys.exit()
		elif(arg in simplecmds):
			cmd = arg[1:]
		elif(arg == '-f'):
			sysvals.useftrace = True
		elif(arg == '-callgraph'):
			sysvals.useftrace = True
			sysvals.usecallgraph = True
		elif(arg == '-mincg'):
			sysvals.mincglen = aslib.getArgFloat('-mincg', args, 0.0, 10000.0)
		elif(arg == '-cgfilter'):
			try:
				val = args.next()
			except:
				doError('No callgraph functions supplied', True)
			sysvals.setDeviceFilter(val)
		elif(arg == '-bl'):
			try:
				val = args.next()
			except:
				doError('No boot loader name supplied', True)
			if val.lower() not in ['grub']:
				doError('Unknown boot loader: %s' % val, True)
			sysvals.bootloader = val.lower()
		elif(arg == '-timeprec'):
			sysvals.setPrecision(aslib.getArgInt('-timeprec', args, 0, 6))
		elif(arg == '-maxdepth'):
			sysvals.max_graph_depth = aslib.getArgInt('-maxdepth', args, 0, 1000)
		elif(arg == '-func'):
			try:
				val = args.next()
			except:
				doError('No filter functions supplied', True)
			sysvals.useftrace = True
			sysvals.usecallgraph = True
			sysvals.rootCheck(True)
			sysvals.setGraphFilter(val)
		elif(arg == '-ftrace'):
			try:
				val = args.next()
			except:
				doError('No ftrace file supplied', True)
			if(os.path.exists(val) == False):
				doError('%s does not exist' % val)
			testrun = False
			sysvals.ftracefile = val
		elif(arg == '-addlogs'):
			sysvals.dmesglog = True
		elif(arg == '-expandcg'):
			sysvals.cgexp = True
		elif(arg == '-dmesg'):
			try:
				val = args.next()
			except:
				doError('No dmesg file supplied', True)
			if(os.path.exists(val) == False):
				doError('%s does not exist' % val)
			if(sysvals.htmlfile == val or sysvals.outfile == val):
				doError('Output filename collision')
			testrun = False
			sysvals.dmesgfile = val
		elif(arg == '-o'):
			try:
				val = args.next()
			except:
				doError('No subdirectory name supplied', True)
			sysvals.testdir = sysvals.setOutputFolder(val)
		elif(arg == '-reboot'):
			sysvals.reboot = True
		elif(arg == '-manual'):
			sysvals.reboot = True
			sysvals.manual = True
		# remaining options are only for cron job use
		elif(arg == '-cronjob'):
			sysvals.iscronjob = True
		else:
			doError('Invalid argument: '+arg, True)

	# compatibility errors and access checks
	if(sysvals.iscronjob and (sysvals.reboot or \
		sysvals.dmesgfile or sysvals.ftracefile or cmd)):
		doError('-cronjob is meant for batch purposes only')
	if(sysvals.reboot and (sysvals.dmesgfile or sysvals.ftracefile)):
		doError('-reboot and -dmesg/-ftrace are incompatible')
	if cmd or sysvals.reboot or sysvals.iscronjob or testrun:
		sysvals.rootCheck(True)
	if (testrun and sysvals.useftrace) or cmd == 'flistall':
		if not sysvals.verifyFtrace():
			doError('Ftrace is not properly enabled')

	# run utility commands
	sysvals.cpuInfo()
	if cmd != '':
		if cmd == 'kpupdate':
			updateKernelParams()
		elif cmd == 'flistall':
			for f in sysvals.getBootFtraceFilterFunctions():
				print f
		elif cmd == 'checkbl':
			sysvals.getBootLoader()
			print 'Boot Loader: %s\n%s' % (sysvals.bootloader, sysvals.blexec)
		elif(cmd == 'sysinfo'):
			sysvals.printSystemInfo()
		sys.exit()

	# reboot: update grub, setup a cronjob, and reboot
	if sysvals.reboot:
		if (sysvals.useftrace or sysvals.usecallgraph) and \
			not sysvals.checkFtraceKernelVersion():
			doError('Ftrace functionality requires kernel v4.10 or newer')
		if not sysvals.manual:
			updateKernelParams()
			updateCron()
			call('reboot')
		else:
			sysvals.manualRebootRequired()
		sys.exit()

	# cronjob: remove the cronjob, grub changes, and disable ftrace
	if sysvals.iscronjob:
		updateCron(True)
		updateKernelParams(True)
		try:
			sysvals.fsetVal('0', 'tracing_on')
		except:
			pass

	# testrun: generate copies of the logs
	if testrun:
		retrieveLogs()
	else:
		sysvals.setOutputFile()

	# process the log data
	if sysvals.dmesgfile:
		data = parseKernelLog()
		if(not data.valid):
			doError('No initcall data found in %s' % sysvals.dmesgfile)
		if sysvals.useftrace and sysvals.ftracefile:
			parseTraceLog(data)
	else:
		doError('dmesg file required')

	print('          Host: %s' % sysvals.hostname)
	print('     Test time: %s' % sysvals.testtime)
	print('     Boot time: %s' % data.boottime)
	print('Kernel Version: %s' % sysvals.kernel)
	print('  Kernel start: %.3f' % (data.start * 1000))
	print('Usermode start: %.3f' % (data.tUserMode * 1000))
	print('Last Init Call: %.3f' % (data.end * 1000))

	# handle embedded output logs
	if(sysvals.outfile and sysvals.embedded):
		fp = open(sysvals.outfile, 'w')
		fp.write('pass %s initstart %.3f end %.3f boot %s\n' %
			(data.valid, data.tUserMode*1000, data.end*1000, data.boottime))
		fp.close()

	createBootGraph(data)

	# if running as root, change output dir owner to sudo_user
	if testrun and os.path.isdir(sysvals.testdir) and \
		os.getuid() == 0 and 'SUDO_USER' in os.environ:
		cmd = 'chown -R {0}:{0} {1} > /dev/null 2>&1'
		call(cmd.format(os.environ['SUDO_USER'], sysvals.testdir), shell=True)