scripts/analyze_suspend.py



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#!/usr/bin/python
#
# Tool for analyzing suspend/resume 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.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
#
# 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 suspend/resume time. Using a kernel image built
#	 with a few extra options enabled, the tool will execute a suspend and
#	 will capture dmesg and ftrace data until resume is complete. This data
#	 is transformed into a device timeline and a callgraph to give a quick
#	 and detailed view of which devices and callbacks are taking the most
#	 time in suspend/resume. The output is a single html file which can be
#	 viewed in firefox or chrome.
#
#	 The following kernel build options are required:
#		 CONFIG_PM_DEBUG=y
#		 CONFIG_PM_SLEEP_DEBUG=y
#		 CONFIG_FTRACE=y
#		 CONFIG_FUNCTION_TRACER=y
#		 CONFIG_FUNCTION_GRAPH_TRACER=y
#
#	 For kernel versions older than 3.15:
#	 The following additional kernel parameters are required:
#		 (e.g. in file /etc/default/grub)
#		 GRUB_CMDLINE_LINUX_DEFAULT="... initcall_debug log_buf_len=16M ..."
#

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

import sys
import time
import os
import string
import re
import platform
from datetime import datetime
import struct

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

# Class: SystemValues
# Description:
#	 A global, single-instance container used to
#	 store system values and test parameters
class SystemValues:
	version = 3.0
	verbose = False
	testdir = '.'
	tpath = '/sys/kernel/debug/tracing/'
	fpdtpath = '/sys/firmware/acpi/tables/FPDT'
	epath = '/sys/kernel/debug/tracing/events/power/'
	traceevents = [
		'suspend_resume',
		'device_pm_callback_end',
		'device_pm_callback_start'
	]
	modename = {
		'freeze': 'Suspend-To-Idle (S0)',
		'standby': 'Power-On Suspend (S1)',
		'mem': 'Suspend-to-RAM (S3)',
		'disk': 'Suspend-to-disk (S4)'
	}
	mempath = '/dev/mem'
	powerfile = '/sys/power/state'
	suspendmode = 'mem'
	hostname = 'localhost'
	prefix = 'test'
	teststamp = ''
	dmesgfile = ''
	ftracefile = ''
	htmlfile = ''
	rtcwake = False
	rtcwaketime = 10
	rtcpath = ''
	android = False
	adb = 'adb'
	devicefilter = []
	stamp = 0
	execcount = 1
	x2delay = 0
	usecallgraph = False
	usetraceevents = False
	usetraceeventsonly = False
	notestrun = False
	altdevname = dict()
	postresumetime = 0
	tracertypefmt = '# tracer: (?P<t>.*)'
	firmwarefmt = '# fwsuspend (?P<s>[0-9]*) fwresume (?P<r>[0-9]*)$'
	postresumefmt = '# post resume time (?P<t>[0-9]*)$'
	stampfmt = '# suspend-(?P<m>[0-9]{2})(?P<d>[0-9]{2})(?P<y>[0-9]{2})-'+\
				'(?P<H>[0-9]{2})(?P<M>[0-9]{2})(?P<S>[0-9]{2})'+\
				' (?P<host>.*) (?P<mode>.*) (?P<kernel>.*)$'
	def __init__(self):
		self.hostname = platform.node()
		if(self.hostname == ''):
			self.hostname = 'localhost'
		rtc = "rtc0"
		if os.path.exists('/dev/rtc'):
			rtc = os.readlink('/dev/rtc')
		rtc = '/sys/class/rtc/'+rtc
		if os.path.exists(rtc) and os.path.exists(rtc+'/date') and \
			os.path.exists(rtc+'/time') and os.path.exists(rtc+'/wakealarm'):
			self.rtcpath = rtc
	def setOutputFile(self):
		if((self.htmlfile == '') and (self.dmesgfile != '')):
			m = re.match('(?P<name>.*)_dmesg\.txt$', self.dmesgfile)
			if(m):
				self.htmlfile = m.group('name')+'.html'
		if((self.htmlfile == '') and (self.ftracefile != '')):
			m = re.match('(?P<name>.*)_ftrace\.txt$', self.ftracefile)
			if(m):
				self.htmlfile = m.group('name')+'.html'
		if(self.htmlfile == ''):
			self.htmlfile = 'output.html'
	def initTestOutput(self, subdir):
		if(not self.android):
			self.prefix = self.hostname
			v = open('/proc/version', 'r').read().strip()
			kver = string.split(v)[2]
		else:
			self.prefix = 'android'
			v = os.popen(self.adb+' shell cat /proc/version').read().strip()
			kver = string.split(v)[2]
		testtime = datetime.now().strftime('suspend-%m%d%y-%H%M%S')
		if(subdir != "."):
			self.testdir = subdir+"/"+testtime
		else:
			self.testdir = testtime
		self.teststamp = \
			'# '+testtime+' '+self.prefix+' '+self.suspendmode+' '+kver
		self.dmesgfile = \
			self.testdir+'/'+self.prefix+'_'+self.suspendmode+'_dmesg.txt'
		self.ftracefile = \
			self.testdir+'/'+self.prefix+'_'+self.suspendmode+'_ftrace.txt'
		self.htmlfile = \
			self.testdir+'/'+self.prefix+'_'+self.suspendmode+'.html'
		os.mkdir(self.testdir)
	def setDeviceFilter(self, devnames):
		self.devicefilter = string.split(devnames)
	def rtcWakeAlarm(self):
		os.system('echo 0 > '+self.rtcpath+'/wakealarm')
		outD = open(self.rtcpath+'/date', 'r').read().strip()
		outT = open(self.rtcpath+'/time', 'r').read().strip()
		mD = re.match('^(?P<y>[0-9]*)-(?P<m>[0-9]*)-(?P<d>[0-9]*)', outD)
		mT = re.match('^(?P<h>[0-9]*):(?P<m>[0-9]*):(?P<s>[0-9]*)', outT)
		if(mD and mT):
			# get the current time from hardware
			utcoffset = int((datetime.now() - datetime.utcnow()).total_seconds())
			dt = datetime(\
				int(mD.group('y')), int(mD.group('m')), int(mD.group('d')),
				int(mT.group('h')), int(mT.group('m')), int(mT.group('s')))
			nowtime = int(dt.strftime('%s')) + utcoffset
		else:
			# if hardware time fails, use the software time
			nowtime = int(datetime.now().strftime('%s'))
		alarm = nowtime + self.rtcwaketime
		os.system('echo %d > %s/wakealarm' % (alarm, self.rtcpath))

sysvals = SystemValues()

# Class: DeviceNode
# Description:
#	 A container used to create a device hierachy, with a single root node
#	 and a tree of child nodes. Used by Data.deviceTopology()
class DeviceNode:
	name = ''
	children = 0
	depth = 0
	def __init__(self, nodename, nodedepth):
		self.name = nodename
		self.children = []
		self.depth = nodedepth

# Class: Data
# Description:
#	 The primary container for suspend/resume test data. There is one for
#	 each test run. The data is organized into a cronological hierarchy:
#	 Data.dmesg {
#		root structure, started as dmesg & ftrace, but now only ftrace
#		contents: times for suspend start/end, resume start/end, fwdata
#		phases {
#			10 sequential, non-overlapping phases of S/R
#			contents: times for phase start/end, order/color data for html
#			devlist {
#				device callback or action list for this phase
#				device {
#					a single device callback or generic action
#					contents: start/stop times, pid/cpu/driver info
#						parents/children, html id for timeline/callgraph
#						optionally includes an ftrace callgraph
#						optionally includes intradev trace events
#				}
#			}
#		}
#	}
#
class Data:
	dmesg = {}  # root data structure
	phases = [] # ordered list of phases
	start = 0.0 # test start
	end = 0.0   # test end
	tSuspended = 0.0 # low-level suspend start
	tResumed = 0.0   # low-level resume start
	tLow = 0.0       # time spent in low-level suspend (standby/freeze)
	fwValid = False  # is firmware data available
	fwSuspend = 0    # time spent in firmware suspend
	fwResume = 0     # time spent in firmware resume
	dmesgtext = []   # dmesg text file in memory
	testnumber = 0
	idstr = ''
	html_device_id = 0
	stamp = 0
	outfile = ''
	def __init__(self, num):
		idchar = 'abcdefghijklmnopqrstuvwxyz'
		self.testnumber = num
		self.idstr = idchar[num]
		self.dmesgtext = []
		self.phases = []
		self.dmesg = { # fixed list of 10 phases
			'suspend_prepare': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#CCFFCC', 'order': 0},
			        'suspend': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#88FF88', 'order': 1},
			   'suspend_late': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#00AA00', 'order': 2},
			  'suspend_noirq': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#008888', 'order': 3},
		    'suspend_machine': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#0000FF', 'order': 4},
			 'resume_machine': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#FF0000', 'order': 5},
			   'resume_noirq': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#FF9900', 'order': 6},
			   'resume_early': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#FFCC00', 'order': 7},
			         'resume': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#FFFF88', 'order': 8},
			'resume_complete': {'list': dict(), 'start': -1.0, 'end': -1.0,
								'row': 0, 'color': '#FFFFCC', 'order': 9}
		}
		self.phases = self.sortedPhases()
	def getStart(self):
		return self.dmesg[self.phases[0]]['start']
	def setStart(self, time):
		self.start = time
		self.dmesg[self.phases[0]]['start'] = time
	def getEnd(self):
		return self.dmesg[self.phases[-1]]['end']
	def setEnd(self, time):
		self.end = time
		self.dmesg[self.phases[-1]]['end'] = time
	def isTraceEventOutsideDeviceCalls(self, pid, time):
		for phase in self.phases:
			list = self.dmesg[phase]['list']
			for dev in list:
				d = list[dev]
				if(d['pid'] == pid and time >= d['start'] and
					time <= d['end']):
					return False
		return True
	def addIntraDevTraceEvent(self, action, name, pid, time):
		if(action == 'mutex_lock_try'):
			color = 'red'
		elif(action == 'mutex_lock_pass'):
			color = 'green'
		elif(action == 'mutex_unlock'):
			color = 'blue'
		else:
			# create separate colors based on the name
			v1 = len(name)*10 % 256
			v2 = string.count(name, 'e')*100 % 256
			v3 = ord(name[0])*20 % 256
			color = '#%06X' % ((v1*0x10000) + (v2*0x100) + v3)
		for phase in self.phases:
			list = self.dmesg[phase]['list']
			for dev in list:
				d = list[dev]
				if(d['pid'] == pid and time >= d['start'] and
					time <= d['end']):
					e = TraceEvent(action, name, color, time)
					if('traceevents' not in d):
						d['traceevents'] = []
					d['traceevents'].append(e)
					return d
					break
		return 0
	def capIntraDevTraceEvent(self, action, name, pid, time):
		for phase in self.phases:
			list = self.dmesg[phase]['list']
			for dev in list:
				d = list[dev]
				if(d['pid'] == pid and time >= d['start'] and
					time <= d['end']):
					if('traceevents' not in d):
						return
					for e in d['traceevents']:
						if(e.action == action and
							e.name == name and not e.ready):
							e.length = time - e.time
							e.ready = True
							break
					return
	def trimTimeVal(self, t, t0, dT, left):
		if left:
			if(t > t0):
				if(t - dT < t0):
					return t0
				return t - dT
			else:
				return t
		else:
			if(t < t0 + dT):
				if(t > t0):
					return t0 + dT
				return t + dT
			else:
				return t
	def trimTime(self, t0, dT, left):
		self.tSuspended = self.trimTimeVal(self.tSuspended, t0, dT, left)
		self.tResumed = self.trimTimeVal(self.tResumed, t0, dT, left)
		self.start = self.trimTimeVal(self.start, t0, dT, left)
		self.end = self.trimTimeVal(self.end, t0, dT, left)
		for phase in self.phases:
			p = self.dmesg[phase]
			p['start'] = self.trimTimeVal(p['start'], t0, dT, left)
			p['end'] = self.trimTimeVal(p['end'], t0, dT, left)
			list = p['list']
			for name in list:
				d = list[name]
				d['start'] = self.trimTimeVal(d['start'], t0, dT, left)
				d['end'] = self.trimTimeVal(d['end'], t0, dT, left)
				if('ftrace' in d):
					cg = d['ftrace']
					cg.start = self.trimTimeVal(cg.start, t0, dT, left)
					cg.end = self.trimTimeVal(cg.end, t0, dT, left)
					for line in cg.list:
						line.time = self.trimTimeVal(line.time, t0, dT, left)
				if('traceevents' in d):
					for e in d['traceevents']:
						e.time = self.trimTimeVal(e.time, t0, dT, left)
	def normalizeTime(self, tZero):
		# first trim out any standby or freeze clock time
		if(self.tSuspended != self.tResumed):
			if(self.tResumed > tZero):
				self.trimTime(self.tSuspended, \
					self.tResumed-self.tSuspended, True)
			else:
				self.trimTime(self.tSuspended, \
					self.tResumed-self.tSuspended, False)
		# shift the timeline so that tZero is the new 0
		self.tSuspended -= tZero
		self.tResumed -= tZero
		self.start -= tZero
		self.end -= tZero
		for phase in self.phases:
			p = self.dmesg[phase]
			p['start'] -= tZero
			p['end'] -= tZero
			list = p['list']
			for name in list:
				d = list[name]
				d['start'] -= tZero
				d['end'] -= tZero
				if('ftrace' in d):
					cg = d['ftrace']
					cg.start -= tZero
					cg.end -= tZero
					for line in cg.list:
						line.time -= tZero
				if('traceevents' in d):
					for e in d['traceevents']:
						e.time -= tZero
	def newPhaseWithSingleAction(self, phasename, devname, start, end, color):
		for phase in self.phases:
			self.dmesg[phase]['order'] += 1
		self.html_device_id += 1
		devid = '%s%d' % (self.idstr, self.html_device_id)
		list = dict()
		list[devname] = \
			{'start': start, 'end': end, 'pid': 0, 'par': '',
			'length': (end-start), 'row': 0, 'id': devid, 'drv': '' };
		self.dmesg[phasename] = \
			{'list': list, 'start': start, 'end': end,
			'row': 0, 'color': color, 'order': 0}
		self.phases = self.sortedPhases()
	def newPhase(self, phasename, start, end, color, order):
		if(order < 0):
			order = len(self.phases)
		for phase in self.phases[order:]:
			self.dmesg[phase]['order'] += 1
		if(order > 0):
			p = self.phases[order-1]
			self.dmesg[p]['end'] = start
		if(order < len(self.phases)):
			p = self.phases[order]
			self.dmesg[p]['start'] = end
		list = dict()
		self.dmesg[phasename] = \
			{'list': list, 'start': start, 'end': end,
			'row': 0, 'color': color, 'order': order}
		self.phases = self.sortedPhases()
	def setPhase(self, phase, ktime, isbegin):
		if(isbegin):
			self.dmesg[phase]['start'] = ktime
		else:
			self.dmesg[phase]['end'] = ktime
	def dmesgSortVal(self, phase):
		return self.dmesg[phase]['order']
	def sortedPhases(self):
		return sorted(self.dmesg, key=self.dmesgSortVal)
	def sortedDevices(self, phase):
		list = self.dmesg[phase]['list']
		slist = []
		tmp = dict()
		for devname in list:
			dev = list[devname]
			tmp[dev['start']] = devname
		for t in sorted(tmp):
			slist.append(tmp[t])
		return slist
	def fixupInitcalls(self, phase, end):
		# if any calls never returned, clip them at system resume end
		phaselist = self.dmesg[phase]['list']
		for devname in phaselist:
			dev = phaselist[devname]
			if(dev['end'] < 0):
				dev['end'] = end
				vprint('%s (%s): callback didnt return' % (devname, phase))
	def deviceFilter(self, devicefilter):
		# remove all by the relatives of the filter devnames
		filter = []
		for phase in self.phases:
			list = self.dmesg[phase]['list']
			for name in devicefilter:
				dev = name
				while(dev in list):
					if(dev not in filter):
						filter.append(dev)
					dev = list[dev]['par']
				children = self.deviceDescendants(name, phase)
				for dev in children:
					if(dev not in filter):
						filter.append(dev)
		for phase in self.phases:
			list = self.dmesg[phase]['list']
			rmlist = []
			for name in list:
				pid = list[name]['pid']
				if(name not in filter and pid >= 0):
					rmlist.append(name)
			for name in rmlist:
				del list[name]
	def fixupInitcallsThatDidntReturn(self):
		# if any calls never returned, clip them at system resume end
		for phase in self.phases:
			self.fixupInitcalls(phase, self.getEnd())
	def newActionGlobal(self, name, start, end):
		# which phase is this device callback or action "in"
		targetphase = "none"
		overlap = 0.0
		for phase in self.phases:
			pstart = self.dmesg[phase]['start']
			pend = self.dmesg[phase]['end']
			o = max(0, min(end, pend) - max(start, pstart))
			if(o > overlap):
				targetphase = phase
				overlap = o
		if targetphase in self.phases:
			self.newAction(targetphase, name, -1, '', start, end, '')
			return True
		return False
	def newAction(self, phase, name, pid, parent, start, end, drv):
		# 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
		list[name] = {'start': start, 'end': end, 'pid': pid, 'par': parent,
					  'length': length, 'row': 0, 'id': devid, 'drv': drv }
	def deviceIDs(self, devlist, phase):
		idlist = []
		list = self.dmesg[phase]['list']
		for devname in list:
			if devname in devlist:
				idlist.append(list[devname]['id'])
		return idlist
	def deviceParentID(self, devname, phase):
		pdev = ''
		pdevid = ''
		list = self.dmesg[phase]['list']
		if devname in list:
			pdev = list[devname]['par']
		if pdev in list:
			return list[pdev]['id']
		return pdev
	def deviceChildren(self, devname, phase):
		devlist = []
		list = self.dmesg[phase]['list']
		for child in list:
			if(list[child]['par'] == devname):
				devlist.append(child)
		return devlist
	def deviceDescendants(self, devname, phase):
		children = self.deviceChildren(devname, phase)
		family = children
		for child in children:
			family += self.deviceDescendants(child, phase)
		return family
	def deviceChildrenIDs(self, devname, phase):
		devlist = self.deviceChildren(devname, phase)
		return self.deviceIDs(devlist, phase)
	def printDetails(self):
		vprint('          test start: %f' % self.start)
		for phase in self.phases:
			dc = len(self.dmesg[phase]['list'])
			vprint('    %16s: %f - %f (%d devices)' % (phase, \
				self.dmesg[phase]['start'], self.dmesg[phase]['end'], dc))
		vprint('            test end: %f' % self.end)
	def masterTopology(self, name, list, depth):
		node = DeviceNode(name, depth)
		for cname in list:
			clist = self.deviceChildren(cname, 'resume')
			cnode = self.masterTopology(cname, clist, depth+1)
			node.children.append(cnode)
		return node
	def printTopology(self, node):
		html = ''
		if node.name:
			info = ''
			drv = ''
			for phase in self.phases:
				list = self.dmesg[phase]['list']
				if node.name in list:
					s = list[node.name]['start']
					e = list[node.name]['end']
					if list[node.name]['drv']:
						drv = ' {'+list[node.name]['drv']+'}'
					info += ('<li>%s: %.3fms</li>' % (phase, (e-s)*1000))
			html += '<li><b>'+node.name+drv+'</b>'
			if info:
				html += '<ul>'+info+'</ul>'
			html += '</li>'
		if len(node.children) > 0:
			html += '<ul>'
			for cnode in node.children:
				html += self.printTopology(cnode)
			html += '</ul>'
		return html
	def rootDeviceList(self):
		# list of devices graphed
		real = []
		for phase in self.dmesg:
			list = self.dmesg[phase]['list']
			for dev in list:
				if list[dev]['pid'] >= 0 and dev not in real:
					real.append(dev)
		# list of top-most root devices
		rootlist = []
		for phase in self.dmesg:
			list = self.dmesg[phase]['list']
			for dev in list:
				pdev = list[dev]['par']
				if(re.match('[0-9]*-[0-9]*\.[0-9]*[\.0-9]*\:[\.0-9]*$', pdev)):
					continue
				if pdev and pdev not in real and pdev not in rootlist:
					rootlist.append(pdev)
		return rootlist
	def deviceTopology(self):
		rootlist = self.rootDeviceList()
		master = self.masterTopology('', rootlist, 0)
		return self.printTopology(master)

# Class: TraceEvent
# Description:
#	 A container for trace event data found in the ftrace file
class TraceEvent:
	ready = False
	name = ''
	time = 0.0
	color = '#FFFFFF'
	length = 0.0
	action = ''
	def __init__(self, a, n, c, t):
		self.action = a
		self.name = n
		self.color = c
		self.time = t

# Class: FTraceLine
# Description:
#	 A container for a single line of ftrace data. There are six basic types:
#		 callgraph line:
#			  call: "  dpm_run_callback() {"
#			return: "  }"
#			  leaf: " dpm_run_callback();"
#		 trace event:
#			 tracing_mark_write: SUSPEND START or RESUME COMPLETE
#			 suspend_resume: phase or custom exec block data
#			 device_pm_callback: device callback info
class FTraceLine:
	time = 0.0
	length = 0.0
	fcall = False
	freturn = False
	fevent = False
	depth = 0
	name = ''
	type = ''
	def __init__(self, t, m, d):
		self.time = float(t)
		# is this a trace event
		if(d == 'traceevent' or re.match('^ *\/\* *(?P<msg>.*) \*\/ *$', m)):
			if(d == 'traceevent'):
				# nop format trace event
				msg = m
			else:
				# function_graph format trace event
				em = re.match('^ *\/\* *(?P<msg>.*) \*\/ *$', m)
				msg = em.group('msg')

			emm = re.match('^(?P<call>.*?): (?P<msg>.*)', msg)
			if(emm):
				self.name = emm.group('msg')
				self.type = emm.group('call')
			else:
				self.name = msg
			self.fevent = True
			return
		# convert the duration to seconds
		if(d):
			self.length = float(d)/1000000
		# the indentation determines the depth
		match = re.match('^(?P<d> *)(?P<o>.*)$', m)
		if(not match):
			return
		self.depth = self.getDepth(match.group('d'))
		m = match.group('o')
		# function return
		if(m[0] == '}'):
			self.freturn = True
			if(len(m) > 1):
				# includes comment with function name
				match = re.match('^} *\/\* *(?P<n>.*) *\*\/$', m)
				if(match):
					self.name = match.group('n')
		# function call
		else:
			self.fcall = True
			# function call with children
			if(m[-1] == '{'):
				match = re.match('^(?P<n>.*) *\(.*', m)
				if(match):
					self.name = match.group('n')
			# function call with no children (leaf)
			elif(m[-1] == ';'):
				self.freturn = True
				match = re.match('^(?P<n>.*) *\(.*', m)
				if(match):
					self.name = match.group('n')
			# something else (possibly a trace marker)
			else:
				self.name = m
	def getDepth(self, str):
		return len(str)/2
	def debugPrint(self, dev):
		if(self.freturn and self.fcall):
			print('%s -- %f (%02d): %s(); (%.3f us)' % (dev, self.time, \
				self.depth, self.name, self.length*1000000))
		elif(self.freturn):
			print('%s -- %f (%02d): %s} (%.3f us)' % (dev, self.time, \
				self.depth, self.name, self.length*1000000))
		else:
			print('%s -- %f (%02d): %s() { (%.3f us)' % (dev, self.time, \
				self.depth, self.name, self.length*1000000))

# Class: FTraceCallGraph
# Description:
#	 A container for the ftrace callgraph of a single recursive function.
#	 This can be a dpm_run_callback, dpm_prepare, or dpm_complete callgraph
#	 Each instance is tied to a single device in a single phase, and is
#	 comprised of an ordered list of FTraceLine objects
class FTraceCallGraph:
	start = -1.0
	end = -1.0
	list = []
	invalid = False
	depth = 0
	def __init__(self):
		self.start = -1.0
		self.end = -1.0
		self.list = []
		self.depth = 0
	def setDepth(self, line):
		if(line.fcall and not line.freturn):
			line.depth = self.depth
			self.depth += 1
		elif(line.freturn and not line.fcall):
			self.depth -= 1
			line.depth = self.depth
		else:
			line.depth = self.depth
	def addLine(self, line, match):
		if(not self.invalid):
			self.setDepth(line)
		if(line.depth == 0 and line.freturn):
			if(self.start < 0):
				self.start = line.time
			self.end = line.time
			self.list.append(line)
			return True
		if(self.invalid):
			return False
		if(len(self.list) >= 1000000 or self.depth < 0):
			if(len(self.list) > 0):
				first = self.list[0]
				self.list = []
				self.list.append(first)
			self.invalid = True
			if(not match):
				return False
			id = 'task %s cpu %s' % (match.group('pid'), match.group('cpu'))
			window = '(%f - %f)' % (self.start, line.time)
			if(self.depth < 0):
				print('Too much data for '+id+\
					' (buffer overflow), ignoring this callback')
			else:
				print('Too much data for '+id+\
					' '+window+', ignoring this callback')
			return False
		self.list.append(line)
		if(self.start < 0):
			self.start = line.time
		return False
	def slice(self, t0, tN):
		minicg = FTraceCallGraph()
		count = -1
		firstdepth = 0
		for l in self.list:
			if(l.time < t0 or l.time > tN):
				continue
			if(count < 0):
				if(not l.fcall or l.name == 'dev_driver_string'):
					continue
				firstdepth = l.depth
				count = 0
			l.depth -= firstdepth
			minicg.addLine(l, 0)
			if((count == 0 and l.freturn and l.fcall) or
				(count > 0 and l.depth <= 0)):
				break
			count += 1
		return minicg
	def sanityCheck(self):
		stack = dict()
		cnt = 0
		for l in self.list:
			if(l.fcall and not l.freturn):
				stack[l.depth] = l
				cnt += 1
			elif(l.freturn and not l.fcall):
				if(l.depth not in stack):
					return False
				stack[l.depth].length = l.length
				stack[l.depth] = 0
				l.length = 0
				cnt -= 1
		if(cnt == 0):
			return True
		return False
	def debugPrint(self, filename):
		if(filename == 'stdout'):
			print('[%f - %f]') % (self.start, self.end)
			for l in self.list:
				if(l.freturn and l.fcall):
					print('%f (%02d): %s(); (%.3f us)' % (l.time, \
						l.depth, l.name, l.length*1000000))
				elif(l.freturn):
					print('%f (%02d): %s} (%.3f us)' % (l.time, \
						l.depth, l.name, l.length*1000000))
				else:
					print('%f (%02d): %s() { (%.3f us)' % (l.time, \
						l.depth, l.name, l.length*1000000))
			print(' ')
		else:
			fp = open(filename, 'w')
			print(filename)
			for l in self.list:
				if(l.freturn and l.fcall):
					fp.write('%f (%02d): %s(); (%.3f us)\n' % (l.time, \
						l.depth, l.name, l.length*1000000))
				elif(l.freturn):
					fp.write('%f (%02d): %s} (%.3f us)\n' % (l.time, \
						l.depth, l.name, l.length*1000000))
				else:
					fp.write('%f (%02d): %s() { (%.3f us)\n' % (l.time, \
						l.depth, l.name, l.length*1000000))
			fp.close()

# Class: Timeline
# Description:
#	 A container for a suspend/resume html timeline. In older versions
#	 of the script there were multiple timelines, but in the latest
#	 there is only one.
class Timeline:
	html = {}
	scaleH = 0.0 # height of the row as a percent of the timeline height
	rowH = 0.0 # height of each row in percent of the timeline height
	row_height_pixels = 30
	maxrows = 0
	height = 0
	def __init__(self):
		self.html = {
			'timeline': '',
			'legend': '',
			'scale': ''
		}
	def setRows(self, rows):
		self.maxrows = int(rows)
		self.scaleH = 100.0/float(self.maxrows)
		self.height = self.maxrows*self.row_height_pixels
		r = float(self.maxrows - 1)
		if(r < 1.0):
			r = 1.0
		self.rowH = (100.0 - self.scaleH)/r

# Class: TestRun
# Description:
#	 A container for a suspend/resume test run. This is necessary as
#	 there could be more than one, and they need to be separate.
class TestRun:
	ftrace_line_fmt_fg = \
		'^ *(?P<time>[0-9\.]*) *\| *(?P<cpu>[0-9]*)\)'+\
		' *(?P<proc>.*)-(?P<pid>[0-9]*) *\|'+\
		'[ +!]*(?P<dur>[0-9\.]*) .*\|  (?P<msg>.*)'
	ftrace_line_fmt_nop = \
		' *(?P<proc>.*)-(?P<pid>[0-9]*) *\[(?P<cpu>[0-9]*)\] *'+\
		'(?P<flags>.{4}) *(?P<time>[0-9\.]*): *'+\
		'(?P<msg>.*)'
	ftrace_line_fmt = ftrace_line_fmt_nop
	cgformat = False
	ftemp = dict()
	ttemp = dict()
	inthepipe = False
	tracertype = ''
	data = 0
	def __init__(self, dataobj):
		self.data = dataobj
		self.ftemp = dict()
		self.ttemp = dict()
	def isReady(self):
		if(tracertype == '' or not data):
			return False
		return True
	def setTracerType(self, tracer):
		self.tracertype = tracer
		if(tracer == 'function_graph'):
			self.cgformat = True
			self.ftrace_line_fmt = self.ftrace_line_fmt_fg
		elif(tracer == 'nop'):
			self.ftrace_line_fmt = self.ftrace_line_fmt_nop
		else:
			doError('Invalid tracer format: [%s]' % tracer, False)

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

# Function: vprint
# Description:
#	 verbose print (prints only with -verbose option)
# Arguments:
#	 msg: the debug/log message to print
def vprint(msg):
	global sysvals
	if(sysvals.verbose):
		print(msg)

# Function: initFtrace
# Description:
#	 Configure ftrace to use trace events and/or a callgraph
def initFtrace():
	global sysvals

	tp = sysvals.tpath
	cf = 'dpm_run_callback'
	if(sysvals.usetraceeventsonly):
		cf = '-e dpm_prepare -e dpm_complete -e dpm_run_callback'
	if(sysvals.usecallgraph or sysvals.usetraceevents):
		print('INITIALIZING FTRACE...')
		# turn trace off
		os.system('echo 0 > '+tp+'tracing_on')
		# set the trace clock to global
		os.system('echo global > '+tp+'trace_clock')
		# set trace buffer to a huge value
		os.system('echo nop > '+tp+'current_tracer')
		os.system('echo 100000 > '+tp+'buffer_size_kb')
		# initialize the callgraph trace, unless this is an x2 run
		if(sysvals.usecallgraph and sysvals.execcount == 1):
			# set trace type
			os.system('echo function_graph > '+tp+'current_tracer')
			os.system('echo "" > '+tp+'set_ftrace_filter')
			# set trace format options
			os.system('echo funcgraph-abstime > '+tp+'trace_options')
			os.system('echo funcgraph-proc > '+tp+'trace_options')
			# focus only on device suspend and resume
			os.system('cat '+tp+'available_filter_functions | grep '+\
				cf+' > '+tp+'set_graph_function')
		if(sysvals.usetraceevents):
			# turn trace events on
			events = iter(sysvals.traceevents)
			for e in events:
				os.system('echo 1 > '+sysvals.epath+e+'/enable')
		# clear the trace buffer
		os.system('echo "" > '+tp+'trace')

# Function: initFtraceAndroid
# Description:
#	 Configure ftrace to capture trace events
def initFtraceAndroid():
	global sysvals

	tp = sysvals.tpath
	if(sysvals.usetraceevents):
		print('INITIALIZING FTRACE...')
		# turn trace off
		os.system(sysvals.adb+" shell 'echo 0 > "+tp+"tracing_on'")
		# set the trace clock to global
		os.system(sysvals.adb+" shell 'echo global > "+tp+"trace_clock'")
		# set trace buffer to a huge value
		os.system(sysvals.adb+" shell 'echo nop > "+tp+"current_tracer'")
		os.system(sysvals.adb+" shell 'echo 10000 > "+tp+"buffer_size_kb'")
		# turn trace events on
		events = iter(sysvals.traceevents)
		for e in events:
			os.system(sysvals.adb+" shell 'echo 1 > "+\
				sysvals.epath+e+"/enable'")
		# clear the trace buffer
		os.system(sysvals.adb+" shell 'echo \"\" > "+tp+"trace'")

# Function: verifyFtrace
# Description:
#	 Check that ftrace is working on the system
# Output:
#	 True or False
def verifyFtrace():
	global sysvals
	# files needed for any trace data
	files = ['buffer_size_kb', 'current_tracer', 'trace', 'trace_clock',
			 'trace_marker', 'trace_options', 'tracing_on']
	# files needed for callgraph trace data
	tp = sysvals.tpath
	if(sysvals.usecallgraph):
		files += [
			'available_filter_functions',
			'set_ftrace_filter',
			'set_graph_function'
		]
	for f in files:
		if(sysvals.android):
			out = os.popen(sysvals.adb+' shell ls '+tp+f).read().strip()
			if(out != tp+f):
				return False
		else:
			if(os.path.exists(tp+f) == False):
				return False
	return True

# Function: parseStamp
# Description:
#	 Pull in the stamp comment line from the data file(s),
#	 create the stamp, and add it to the global sysvals object
# Arguments:
#	 m: the valid re.match output for the stamp line
def parseStamp(m, data):
	global sysvals
	data.stamp = {'time': '', 'host': '', 'mode': ''}
	dt = datetime(int(m.group('y'))+2000, int(m.group('m')),
		int(m.group('d')), int(m.group('H')), int(m.group('M')),
		int(m.group('S')))
	data.stamp['time'] = dt.strftime('%B %d %Y, %I:%M:%S %p')
	data.stamp['host'] = m.group('host')
	data.stamp['mode'] = m.group('mode')
	data.stamp['kernel'] = m.group('kernel')
	sysvals.suspendmode = data.stamp['mode']
	if not sysvals.stamp:
		sysvals.stamp = data.stamp

# Function: diffStamp
# Description:
#	compare the host, kernel, and mode fields in 3 stamps
# Arguments:
#	 stamp1: string array with mode, kernel, and host
#	 stamp2: string array with mode, kernel, and host
# Return:
#	True if stamps differ, False if they're the same
def diffStamp(stamp1, stamp2):
	if 'host' in stamp1 and 'host' in stamp2:
		if stamp1['host'] != stamp2['host']:
			return True
	if 'kernel' in stamp1 and 'kernel' in stamp2:
		if stamp1['kernel'] != stamp2['kernel']:
			return True
	if 'mode' in stamp1 and 'mode' in stamp2:
		if stamp1['mode'] != stamp2['mode']:
			return True
	return False

# Function: doesTraceLogHaveTraceEvents
# Description:
#	 Quickly determine if the ftrace log has some or all of the trace events
#	 required for primary parsing. Set the usetraceevents and/or
#	 usetraceeventsonly flags in the global sysvals object
def doesTraceLogHaveTraceEvents():
	global sysvals

	sysvals.usetraceeventsonly = True
	sysvals.usetraceevents = False
	for e in sysvals.traceevents:
		out = os.popen('cat '+sysvals.ftracefile+' | grep "'+e+': "').read()
		if(not out):
			sysvals.usetraceeventsonly = False
		if(e == 'suspend_resume' and out):
			sysvals.usetraceevents = True

# Function: appendIncompleteTraceLog
# Description:
#	 [deprecated for kernel 3.15 or newer]
#	 Legacy support of ftrace outputs that lack the device_pm_callback
#	 and/or suspend_resume trace events. The primary data should be
#	 taken from dmesg, and this ftrace is used only for callgraph data
#	 or custom actions in the timeline. The data is appended to the Data
#	 objects provided.
# Arguments:
#	 testruns: the array of Data objects obtained from parseKernelLog
def appendIncompleteTraceLog(testruns):
	global sysvals

	# create TestRun vessels for ftrace parsing
	testcnt = len(testruns)
	testidx = -1
	testrun = []
	for data in testruns:
		testrun.append(TestRun(data))

	# extract the callgraph and traceevent data
	vprint('Analyzing the ftrace data...')
	tf = open(sysvals.ftracefile, 'r')
	for line in tf:
		# remove any latent carriage returns
		line = line.replace('\r\n', '')
		# grab the time stamp first (signifies the start of the test run)
		m = re.match(sysvals.stampfmt, line)
		if(m):
			testidx += 1
			parseStamp(m, testrun[testidx].data)
			continue
		# pull out any firmware data
		if(re.match(sysvals.firmwarefmt, line)):
			continue
		# if we havent found a test time stamp yet keep spinning til we do
		if(testidx < 0):
			continue
		# determine the trace data type (required for further parsing)
		m = re.match(sysvals.tracertypefmt, line)
		if(m):
			tracer = m.group('t')
			testrun[testidx].setTracerType(tracer)
			continue
		# parse only valid lines, if this isnt one move on
		m = re.match(testrun[testidx].ftrace_line_fmt, line)
		if(not m):
			continue
		# gather the basic message data from the line
		m_time = m.group('time')
		m_pid = m.group('pid')
		m_msg = m.group('msg')
		if(testrun[testidx].cgformat):
			m_param3 = m.group('dur')
		else:
			m_param3 = 'traceevent'
		if(m_time and m_pid and m_msg):
			t = FTraceLine(m_time, m_msg, m_param3)
			pid = int(m_pid)
		else:
			continue
		# the line should be a call, return, or event
		if(not t.fcall and not t.freturn and not t.fevent):
			continue
		# only parse the ftrace data during suspend/resume
		data = testrun[testidx].data
		if(not testrun[testidx].inthepipe):
			# look for the suspend start marker
			if(t.fevent):
				if(t.name == 'SUSPEND START'):
					testrun[testidx].inthepipe = True
					data.setStart(t.time)
				continue
		else:
			# trace event processing
			if(t.fevent):
				if(t.name == 'RESUME COMPLETE'):
					testrun[testidx].inthepipe = False
					data.setEnd(t.time)
					if(testidx == testcnt - 1):
						break
					continue
				# general trace events have two types, begin and end
				if(re.match('(?P<name>.*) begin$', t.name)):
					isbegin = True
				elif(re.match('(?P<name>.*) end$', t.name)):
					isbegin = False
				else:
					continue
				m = re.match('(?P<name>.*)\[(?P<val>[0-9]*)\] .*', t.name)
				if(m):
					val = m.group('val')
					if val == '0':
						name = m.group('name')
					else:
						name = m.group('name')+'['+val+']'
				else:
					m = re.match('(?P<name>.*) .*', t.name)
					name = m.group('name')
				# special processing for trace events
				if re.match('dpm_prepare\[.*', name):
					continue
				elif re.match('machine_suspend.*', name):
					continue
				elif re.match('suspend_enter\[.*', name):
					if(not isbegin):
						data.dmesg['suspend_prepare']['end'] = t.time
					continue
				elif re.match('dpm_suspend\[.*', name):
					if(not isbegin):
						data.dmesg['suspend']['end'] = t.time
					continue
				elif re.match('dpm_suspend_late\[.*', name):
					if(isbegin):
						data.dmesg['suspend_late']['start'] = t.time
					else:
						data.dmesg['suspend_late']['end'] = t.time
					continue
				elif re.match('dpm_suspend_noirq\[.*', name):
					if(isbegin):
						data.dmesg['suspend_noirq']['start'] = t.time
					else:
						data.dmesg['suspend_noirq']['end'] = t.time
					continue
				elif re.match('dpm_resume_noirq\[.*', name):
					if(isbegin):
						data.dmesg['resume_machine']['end'] = t.time
						data.dmesg['resume_noirq']['start'] = t.time
					else:
						data.dmesg['resume_noirq']['end'] = t.time
					continue
				elif re.match('dpm_resume_early\[.*', name):
					if(isbegin):
						data.dmesg['resume_early']['start'] = t.time
					else:
						data.dmesg['resume_early']['end'] = t.time
					continue
				elif re.match('dpm_resume\[.*', name):
					if(isbegin):
						data.dmesg['resume']['start'] = t.time
					else:
						data.dmesg['resume']['end'] = t.time
					continue
				elif re.match('dpm_complete\[.*', name):
					if(isbegin):
						data.dmesg['resume_complete']['start'] = t.time
					else:
						data.dmesg['resume_complete']['end'] = t.time
					continue
				# is this trace event outside of the devices calls
				if(data.isTraceEventOutsideDeviceCalls(pid, t.time)):
					# global events (outside device calls) are simply graphed
					if(isbegin):
						# store each trace event in ttemp
						if(name not in testrun[testidx].ttemp):
							testrun[testidx].ttemp[name] = []
						testrun[testidx].ttemp[name].append(\
							{'begin': t.time, 'end': t.time})
					else:
						# finish off matching trace event in ttemp
						if(name in testrun[testidx].ttemp):
							testrun[testidx].ttemp[name][-1]['end'] = t.time
				else:
					if(isbegin):
						data.addIntraDevTraceEvent('', name, pid, t.time)
					else:
						data.capIntraDevTraceEvent('', name, pid, t.time)
			# call/return processing
			elif sysvals.usecallgraph:
				# create a callgraph object for the data
				if(pid not in testrun[testidx].ftemp):
					testrun[testidx].ftemp[pid] = []
					testrun[testidx].ftemp[pid].append(FTraceCallGraph())
				# when the call is finished, see which device matches it
				cg = testrun[testidx].ftemp[pid][-1]
				if(cg.addLine(t, m)):
					testrun[testidx].ftemp[pid].append(FTraceCallGraph())
	tf.close()

	for test in testrun:
		# add the traceevent data to the device hierarchy
		if(sysvals.usetraceevents):
			for name in test.ttemp:
				for event in test.ttemp[name]:
					begin = event['begin']
					end = event['end']
					# if event starts before timeline start, expand timeline
					if(begin < test.data.start):
						test.data.setStart(begin)
					# if event ends after timeline end, expand the timeline
					if(end > test.data.end):
						test.data.setEnd(end)
					test.data.newActionGlobal(name, begin, end)

		# add the callgraph data to the device hierarchy
		for pid in test.ftemp:
			for cg in test.ftemp[pid]:
				if(not cg.sanityCheck()):
					id = 'task %s cpu %s' % (pid, m.group('cpu'))
					vprint('Sanity check failed for '+\
						id+', ignoring this callback')
					continue
				callstart = cg.start
				callend = cg.end
				for p in test.data.phases:
					if(test.data.dmesg[p]['start'] <= callstart and
						callstart <= test.data.dmesg[p]['end']):
						list = test.data.dmesg[p]['list']
						for devname in list:
							dev = list[devname]
							if(pid == dev['pid'] and
								callstart <= dev['start'] and
								callend >= dev['end']):
								dev['ftrace'] = cg
						break

		if(sysvals.verbose):
			test.data.printDetails()


	# add the time in between the tests as a new phase so we can see it
	if(len(testruns) > 1):
		t1e = testruns[0].getEnd()
		t2s = testruns[-1].getStart()
		testruns[-1].newPhaseWithSingleAction('user mode', \
			'user mode', t1e, t2s, '#FF9966')

# Function: parseTraceLog
# Description:
#	 Analyze an ftrace log output file generated from this app during
#	 the execution phase. Used when the ftrace log is the primary data source
#	 and includes the suspend_resume and device_pm_callback trace events
#	 The ftrace filename is taken from sysvals
# Output:
#	 An array of Data objects
def parseTraceLog():
	global sysvals

	vprint('Analyzing the ftrace data...')
	if(os.path.exists(sysvals.ftracefile) == False):
		doError('%s doesnt exist' % sysvals.ftracefile, False)

	# extract the callgraph and traceevent data
	testruns = []
	testdata = []
	testrun = 0
	data = 0
	tf = open(sysvals.ftracefile, 'r')
	phase = 'suspend_prepare'
	for line in tf:
		# remove any latent carriage returns
		line = line.replace('\r\n', '')
		# stamp line: each stamp means a new test run
		m = re.match(sysvals.stampfmt, line)
		if(m):
			data = Data(len(testdata))
			testdata.append(data)
			testrun = TestRun(data)
			testruns.append(testrun)
			parseStamp(m, data)
			continue
		if(not data):
			continue
		# firmware line: pull out any firmware data
		m = re.match(sysvals.firmwarefmt, line)
		if(m):
			data.fwSuspend = int(m.group('s'))
			data.fwResume = int(m.group('r'))
			if(data.fwSuspend > 0 or data.fwResume > 0):
				data.fwValid = True
			continue
		# tracer type line: determine the trace data type
		m = re.match(sysvals.tracertypefmt, line)
		if(m):
			tracer = m.group('t')
			testrun.setTracerType(tracer)
			continue
		# post resume time line: did this test run include post-resume data
		m = re.match(sysvals.postresumefmt, line)
		if(m):
			t = int(m.group('t'))
			if(t > 0):
				sysvals.postresumetime = t
			continue
		# ftrace line: parse only valid lines
		m = re.match(testrun.ftrace_line_fmt, line)
		if(not m):
			continue
		# gather the basic message data from the line
		m_time = m.group('time')
		m_pid = m.group('pid')
		m_msg = m.group('msg')
		if(testrun.cgformat):
			m_param3 = m.group('dur')
		else:
			m_param3 = 'traceevent'
		if(m_time and m_pid and m_msg):
			t = FTraceLine(m_time, m_msg, m_param3)
			pid = int(m_pid)
		else:
			continue
		# the line should be a call, return, or event
		if(not t.fcall and not t.freturn and not t.fevent):
			continue
		# only parse the ftrace data during suspend/resume
		if(not testrun.inthepipe):
			# look for the suspend start marker
			if(t.fevent):
				if(t.name == 'SUSPEND START'):
					testrun.inthepipe = True
					data.setStart(t.time)
			continue
		# trace event processing
		if(t.fevent):
			if(t.name == 'RESUME COMPLETE'):
				if(sysvals.postresumetime > 0):
					phase = 'post_resume'
					data.newPhase(phase, t.time, t.time, '#FF9966', -1)
				else:
					testrun.inthepipe = False
				data.setEnd(t.time)
				continue
			if(phase == 'post_resume'):
				data.setEnd(t.time)
			if(t.type == 'suspend_resume'):
				# suspend_resume trace events have two types, begin and end
				if(re.match('(?P<name>.*) begin$', t.name)):
					isbegin = True
				elif(re.match('(?P<name>.*) end$', t.name)):
					isbegin = False
				else:
					continue
				m = re.match('(?P<name>.*)\[(?P<val>[0-9]*)\] .*', t.name)
				if(m):
					val = m.group('val')
					if val == '0':
						name = m.group('name')
					else:
						name = m.group('name')+'['+val+']'
				else:
					m = re.match('(?P<name>.*) .*', t.name)
					name = m.group('name')
				# ignore these events
				if(re.match('acpi_suspend\[.*', t.name) or
					re.match('suspend_enter\[.*', name)):
					continue
				# -- phase changes --
				# suspend_prepare start
				if(re.match('dpm_prepare\[.*', t.name)):
					phase = 'suspend_prepare'
					if(not isbegin):
						data.dmesg[phase]['end'] = t.time
					continue
				# suspend start
				elif(re.match('dpm_suspend\[.*', t.name)):
					phase = 'suspend'
					data.setPhase(phase, t.time, isbegin)
					continue
				# suspend_late start
				elif(re.match('dpm_suspend_late\[.*', t.name)):
					phase = 'suspend_late'
					data.setPhase(phase, t.time, isbegin)
					continue
				# suspend_noirq start
				elif(re.match('dpm_suspend_noirq\[.*', t.name)):
					phase = 'suspend_noirq'
					data.setPhase(phase, t.time, isbegin)
					if(not isbegin):
						phase = 'suspend_machine'
						data.dmesg[phase]['start'] = t.time
					continue
				# suspend_machine/resume_machine
				elif(re.match('machine_suspend\[.*', t.name)):
					if(isbegin):
						phase = 'suspend_machine'
						data.dmesg[phase]['end'] = t.time
						data.tSuspended = t.time
					else:
						if(sysvals.suspendmode in ['mem', 'disk']):
							data.dmesg['suspend_machine']['end'] = t.time
							data.tSuspended = t.time
						phase = 'resume_machine'
						data.dmesg[phase]['start'] = t.time
						data.tResumed = t.time
						data.tLow = data.tResumed - data.tSuspended
					continue
				# resume_noirq start
				elif(re.match('dpm_resume_noirq\[.*', t.name)):
					phase = 'resume_noirq'
					data.setPhase(phase, t.time, isbegin)
					if(isbegin):
						data.dmesg['resume_machine']['end'] = t.time
					continue
				# resume_early start
				elif(re.match('dpm_resume_early\[.*', t.name)):
					phase = 'resume_early'
					data.setPhase(phase, t.time, isbegin)
					continue
				# resume start
				elif(re.match('dpm_resume\[.*', t.name)):
					phase = 'resume'
					data.setPhase(phase, t.time, isbegin)
					continue
				# resume complete start
				elif(re.match('dpm_complete\[.*', t.name)):
					phase = 'resume_complete'
					if(isbegin):
						data.dmesg[phase]['start'] = t.time
					continue

				# is this trace event outside of the devices calls
				if(data.isTraceEventOutsideDeviceCalls(pid, t.time)):
					# global events (outside device calls) are simply graphed
					if(name not in testrun.ttemp):
						testrun.ttemp[name] = []
					if(isbegin):
						# create a new list entry
						testrun.ttemp[name].append(\
							{'begin': t.time, 'end': t.time})
					else:
						if(len(testrun.ttemp[name]) > 0):
							# if an antry exists, assume this is its end
							testrun.ttemp[name][-1]['end'] = t.time
						elif(phase == 'post_resume'):
							# post resume events can just have ends
							testrun.ttemp[name].append({
								'begin': data.dmesg[phase]['start'],
								'end': t.time})
				else:
					if(isbegin):
						data.addIntraDevTraceEvent('', name, pid, t.time)
					else:
						data.capIntraDevTraceEvent('', name, pid, t.time)
			# device callback start
			elif(t.type == 'device_pm_callback_start'):
				m = re.match('(?P<drv>.*) (?P<d>.*), parent: *(?P<p>.*), .*',\
					t.name);
				if(not m):
					continue
				drv = m.group('drv')
				n = m.group('d')
				p = m.group('p')
				if(n and p):
					data.newAction(phase, n, pid, p, t.time, -1, drv)
			# device callback finish
			elif(t.type == 'device_pm_callback_end'):
				m = re.match('(?P<drv>.*) (?P<d>.*), err.*', t.name);
				if(not m):
					continue
				n = m.group('d')
				list = data.dmesg[phase]['list']
				if(n in list):
					dev = list[n]
					dev['length'] = t.time - dev['start']
					dev['end'] = t.time
		# callgraph processing
		elif sysvals.usecallgraph:
			# this shouldn't happen, but JIC, ignore callgraph data post-res
			if(phase == 'post_resume'):
				continue
			# create a callgraph object for the data
			if(pid not in testrun.ftemp):
				testrun.ftemp[pid] = []
				testrun.ftemp[pid].append(FTraceCallGraph())
			# when the call is finished, see which device matches it
			cg = testrun.ftemp[pid][-1]
			if(cg.addLine(t, m)):
				testrun.ftemp[pid].append(FTraceCallGraph())
	tf.close()

	for test in testruns:
		# add the traceevent data to the device hierarchy
		if(sysvals.usetraceevents):
			for name in test.ttemp:
				for event in test.ttemp[name]:
					begin = event['begin']
					end = event['end']
					# if event starts before timeline start, expand timeline
					if(begin < test.data.start):
						test.data.setStart(begin)
					# if event ends after timeline end, expand the timeline
					if(end > test.data.end):
						test.data.setEnd(end)
					test.data.newActionGlobal(name, begin, end)

		# add the callgraph data to the device hierarchy
		borderphase = {
			'dpm_prepare': 'suspend_prepare',
			'dpm_complete': 'resume_complete'
		}
		for pid in test.ftemp:
			for cg in test.ftemp[pid]:
				if len(cg.list) < 2:
					continue
				if(not cg.sanityCheck()):
					id = 'task %s cpu %s' % (pid, m.group('cpu'))
					vprint('Sanity check failed for '+\
						id+', ignoring this callback')
					continue
				callstart = cg.start
				callend = cg.end
				if(cg.list[0].name in borderphase):
					p = borderphase[cg.list[0].name]
					list = test.data.dmesg[p]['list']
					for devname in list:
						dev = list[devname]
						if(pid == dev['pid'] and
							callstart <= dev['start'] and
							callend >= dev['end']):
							dev['ftrace'] = cg.slice(dev['start'], dev['end'])
					continue
				if(cg.list[0].name != 'dpm_run_callback'):
					continue
				for p in test.data.phases:
					if(test.data.dmesg[p]['start'] <= callstart and
						callstart <= test.data.dmesg[p]['end']):
						list = test.data.dmesg[p]['list']
						for devname in list:
							dev = list[devname]
							if(pid == dev['pid'] and
								callstart <= dev['start'] and
								callend >= dev['end']):
								dev['ftrace'] = cg
						break

	# fill in any missing phases
	for data in testdata:
		lp = data.phases[0]
		for p in data.phases:
			if(data.dmesg[p]['start'] < 0 and data.dmesg[p]['end'] < 0):
				print('WARNING: phase "%s" is missing!' % p)
			if(data.dmesg[p]['start'] < 0):
				data.dmesg[p]['start'] = data.dmesg[lp]['end']
				if(p == 'resume_machine'):
					data.tSuspended = data.dmesg[lp]['end']
					data.tResumed = data.dmesg[lp]['end']
					data.tLow = 0
			if(data.dmesg[p]['end'] < 0):
				data.dmesg[p]['end'] = data.dmesg[p]['start']
			lp = p

		if(len(sysvals.devicefilter) > 0):
			data.deviceFilter(sysvals.devicefilter)
		data.fixupInitcallsThatDidntReturn()
		if(sysvals.verbose):
			data.printDetails()

	# add the time in between the tests as a new phase so we can see it
	if(len(testdata) > 1):
		t1e = testdata[0].getEnd()
		t2s = testdata[-1].getStart()
		testdata[-1].newPhaseWithSingleAction('user mode', \
			'user mode', t1e, t2s, '#FF9966')
	return testdata

# Function: loadKernelLog
# Description:
#	 [deprecated for kernel 3.15.0 or newer]
#	 load the dmesg file into memory and fix up any ordering issues
#	 The dmesg filename is taken from sysvals
# Output:
#	 An array of empty Data objects with only their dmesgtext attributes set
def loadKernelLog():
	global sysvals

	vprint('Analyzing the dmesg data...')
	if(os.path.exists(sysvals.dmesgfile) == False):
		doError('%s doesnt exist' % sysvals.dmesgfile, False)

	# there can be multiple test runs in a single file delineated by stamps
	testruns = []
	data = 0
	lf = open(sysvals.dmesgfile, 'r')
	for line in lf:
		line = line.replace('\r\n', '')
		idx = line.find('[')
		if idx > 1:
			line = line[idx:]
		m = re.match(sysvals.stampfmt, line)
		if(m):
			if(data):
				testruns.append(data)
			data = Data(len(testruns))
			parseStamp(m, data)
			continue
		if(not data):
			continue
		m = re.match(sysvals.firmwarefmt, line)
		if(m):
			data.fwSuspend = int(m.group('s'))
			data.fwResume = int(m.group('r'))
			if(data.fwSuspend > 0 or data.fwResume > 0):
				data.fwValid = True
			continue
		m = re.match('[ \t]*(\[ *)(?P<ktime>[0-9\.]*)(\]) (?P<msg>.*)', line)
		if(m):
			data.dmesgtext.append(line)
			if(re.match('ACPI: resume from mwait', m.group('msg'))):
				print('NOTE: This suspend appears to be freeze rather than'+\
					' %s, it will be treated as such' % sysvals.suspendmode)
				sysvals.suspendmode = 'freeze'
		else:
			vprint('ignoring dmesg line: %s' % line.replace('\n', ''))
	testruns.append(data)
	lf.close()

	if(not data):
		print('ERROR: analyze_suspend header missing from dmesg log')
		sys.exit()

	# fix lines with same timestamp/function with the call and return swapped
	for data in testruns:
		last = ''
		for line in data.dmesgtext:
			mc = re.match('.*(\[ *)(?P<t>[0-9\.]*)(\]) calling  '+\
				'(?P<f>.*)\+ @ .*, parent: .*', line)
			mr = re.match('.*(\[ *)(?P<t>[0-9\.]*)(\]) call '+\
				'(?P<f>.*)\+ returned .* after (?P<dt>.*) usecs', last)
			if(mc and mr and (mc.group('t') == mr.group('t')) and
				(mc.group('f') == mr.group('f'))):
				i = data.dmesgtext.index(last)
				j = data.dmesgtext.index(line)
				data.dmesgtext[i] = line
				data.dmesgtext[j] = last
			last = line
	return testruns

# Function: parseKernelLog
# Description:
#	 [deprecated for kernel 3.15.0 or newer]
#	 Analyse a dmesg log output file generated from this app during
#	 the execution phase. Create a set of device structures in memory
#	 for subsequent formatting in the html output file
#	 This call is only for legacy support on kernels where the ftrace
#	 data lacks the suspend_resume or device_pm_callbacks trace events.
# Arguments:
#	 data: an empty Data object (with dmesgtext) obtained from loadKernelLog
# Output:
#	 The filled Data object
def parseKernelLog(data):
	global sysvals

	phase = 'suspend_runtime'

	if(data.fwValid):
		vprint('Firmware Suspend = %u ns, Firmware Resume = %u ns' % \
			(data.fwSuspend, data.fwResume))

	# dmesg phase match table
	dm = {
		'suspend_prepare': 'PM: Syncing filesystems.*',
		        'suspend': 'PM: Entering [a-z]* sleep.*',
		   'suspend_late': 'PM: suspend of devices complete after.*',
		  'suspend_noirq': 'PM: late suspend of devices complete after.*',
		'suspend_machine': 'PM: noirq suspend of devices complete after.*',
		 'resume_machine': 'ACPI: Low-level resume complete.*',
		   'resume_noirq': 'ACPI: Waking up from system sleep state.*',
		   'resume_early': 'PM: noirq resume of devices complete after.*',
		         'resume': 'PM: early resume of devices complete after.*',
		'resume_complete': 'PM: resume of devices complete after.*',
		    'post_resume': '.*Restarting tasks \.\.\..*',
	}
	if(sysvals.suspendmode == 'standby'):
		dm['resume_machine'] = 'PM: Restoring platform NVS memory'
	elif(sysvals.suspendmode == 'disk'):
		dm['suspend_late'] = 'PM: freeze of devices complete after.*'
		dm['suspend_noirq'] = 'PM: late freeze of devices complete after.*'
		dm['suspend_machine'] = 'PM: noirq freeze of devices complete after.*'
		dm['resume_machine'] = 'PM: Restoring platform NVS memory'
		dm['resume_early'] = 'PM: noirq restore of devices complete after.*'
		dm['resume'] = 'PM: early restore of devices complete after.*'
		dm['resume_complete'] = 'PM: restore of devices complete after.*'
	elif(sysvals.suspendmode == 'freeze'):
		dm['resume_machine'] = 'ACPI: resume from mwait'

	# action table (expected events that occur and show up in dmesg)
	at = {
		'sync_filesystems': {
			'smsg': 'PM: Syncing filesystems.*',
			'emsg': 'PM: Preparing system for mem sleep.*' },
		'freeze_user_processes': {
			'smsg': 'Freezing user space processes .*',
			'emsg': 'Freezing remaining freezable tasks.*' },
		'freeze_tasks': {
			'smsg': 'Freezing remaining freezable tasks.*',
			'emsg': 'PM: Entering (?P<mode>[a-z,A-Z]*) sleep.*' },
		'ACPI prepare': {
			'smsg': 'ACPI: Preparing to enter system sleep state.*',
			'emsg': 'PM: Saving platform NVS memory.*' },
		'PM vns': {
			'smsg': 'PM: Saving platform NVS memory.*',
			'emsg': 'Disabling non-boot CPUs .*' },
	}

	t0 = -1.0
	cpu_start = -1.0
	prevktime = -1.0
	actions = dict()
	for line in data.dmesgtext:
		# -- preprocessing --
		# parse each dmesg line into the time and message
		m = re.match('[ \t]*(\[ *)(?P<ktime>[0-9\.]*)(\]) (?P<msg>.*)', line)
		if(m):
			val = m.group('ktime')
			try:
				ktime = float(val)
			except:
				doWarning('INVALID DMESG LINE: '+\
					line.replace('\n', ''), 'dmesg')
				continue
			msg = m.group('msg')
			# initialize data start to first line time
			if t0 < 0:
				data.setStart(ktime)
				t0 = ktime
		else:
			continue

		# hack for determining resume_machine end for freeze
		if(not sysvals.usetraceevents and sysvals.suspendmode == 'freeze' \
			and phase == 'resume_machine' and \
			re.match('calling  (?P<f>.*)\+ @ .*, parent: .*', msg)):
			data.dmesg['resume_machine']['end'] = ktime
			phase = 'resume_noirq'
			data.dmesg[phase]['start'] = ktime

		# -- phase changes --
		# suspend start
		if(re.match(dm['suspend_prepare'], msg)):
			phase = 'suspend_prepare'
			data.dmesg[phase]['start'] = ktime
			data.setStart(ktime)
		# suspend start
		elif(re.match(dm['suspend'], msg)):
			data.dmesg['suspend_prepare']['end'] = ktime
			phase = 'suspend'
			data.dmesg[phase]['start'] = ktime
		# suspend_late start
		elif(re.match(dm['suspend_late'], msg)):
			data.dmesg['suspend']['end'] = ktime
			phase = 'suspend_late'
			data.dmesg[phase]['start'] = ktime
		# suspend_noirq start
		elif(re.match(dm['suspend_noirq'], msg)):
			data.dmesg['suspend_late']['end'] = ktime
			phase = 'suspend_noirq'
			data.dmesg[phase]['start'] = ktime
		# suspend_machine start
		elif(re.match(dm['suspend_machine'], msg)):
			data.dmesg['suspend_noirq']['end'] = ktime
			phase = 'suspend_machine'
			data.dmesg[phase]['start'] = ktime
		# resume_machine start
		elif(re.match(dm['resume_machine'], msg)):
			if(sysvals.suspendmode in ['freeze', 'standby']):
				data.tSuspended = prevktime
				data.dmesg['suspend_machine']['end'] = prevktime
			else:
				data.tSuspended = ktime
				data.dmesg['suspend_machine']['end'] = ktime
			phase = 'resume_machine'
			data.tResumed = ktime
			data.tLow = data.tResumed - data.tSuspended
			data.dmesg[phase]['start'] = ktime
		# resume_noirq start
		elif(re.match(dm['resume_noirq'], msg)):
			data.dmesg['resume_machine']['end'] = ktime
			phase = 'resume_noirq'
			data.dmesg[phase]['start'] = ktime
		# resume_early start
		elif(re.match(dm['resume_early'], msg)):
			data.dmesg['resume_noirq']['end'] = ktime
			phase = 'resume_early'
			data.dmesg[phase]['start'] = ktime
		# resume start
		elif(re.match(dm['resume'], msg)):
			data.dmesg['resume_early']['end'] = ktime
			phase = 'resume'
			data.dmesg[phase]['start'] = ktime
		# resume complete start
		elif(re.match(dm['resume_complete'], msg)):
			data.dmesg['resume']['end'] = ktime
			phase = 'resume_complete'
			data.dmesg[phase]['start'] = ktime
		# post resume start
		elif(re.match(dm['post_resume'], msg)):
			data.dmesg['resume_complete']['end'] = ktime
			data.setEnd(ktime)
			phase = 'post_resume'
			break

		# -- device callbacks --
		if(phase in data.phases):
			# device init call
			if(re.match('calling  (?P<f>.*)\+ @ .*, parent: .*', msg)):
				sm = re.match('calling  (?P<f>.*)\+ @ '+\
					'(?P<n>.*), parent: (?P<p>.*)', msg);
				f = sm.group('f')
				n = sm.group('n')
				p = sm.group('p')
				if(f and n and p):
					data.newAction(phase, f, int(n), p, ktime, -1, '')
			# device init return
			elif(re.match('call (?P<f>.*)\+ returned .* after '+\
				'(?P<t>.*) usecs', msg)):
				sm = re.match('call (?P<f>.*)\+ returned .* after '+\
					'(?P<t>.*) usecs(?P<a>.*)', msg);
				f = sm.group('f')
				t = sm.group('t')
				list = data.dmesg[phase]['list']
				if(f in list):
					dev = list[f]
					dev['length'] = int(t)
					dev['end'] = ktime

		# -- non-devicecallback actions --
		# if trace events are not available, these are better than nothing
		if(not sysvals.usetraceevents):
			# look for known actions
			for a in at:
				if(re.match(at[a]['smsg'], msg)):
					if(a not in actions):
						actions[a] = []
					actions[a].append({'begin': ktime, 'end': ktime})
				if(re.match(at[a]['emsg'], msg)):
					actions[a][-1]['end'] = ktime
			# now look for CPU on/off events
			if(re.match('Disabling non-boot CPUs .*', msg)):
				# start of first cpu suspend
				cpu_start = ktime
			elif(re.match('Enabling non-boot CPUs .*', msg)):
				# start of first cpu resume
				cpu_start = ktime
			elif(re.match('smpboot: CPU (?P<cpu>[0-9]*) is now offline', msg)):
				# end of a cpu suspend, start of the next
				m = re.match('smpboot: CPU (?P<cpu>[0-9]*) is now offline', msg)
				cpu = 'CPU'+m.group('cpu')
				if(cpu not in actions):
					actions[cpu] = []
				actions[cpu].append({'begin': cpu_start, 'end': ktime})
				cpu_start = ktime
			elif(re.match('CPU(?P<cpu>[0-9]*) is up', msg)):
				# end of a cpu resume, start of the next
				m = re.match('CPU(?P<cpu>[0-9]*) is up', msg)
				cpu = 'CPU'+m.group('cpu')
				if(cpu not in actions):
					actions[cpu] = []
				actions[cpu].append({'begin': cpu_start, 'end': ktime})
				cpu_start = ktime
		prevktime = ktime

	# fill in any missing phases
	lp = data.phases[0]
	for p in data.phases:
		if(data.dmesg[p]['start'] < 0 and data.dmesg[p]['end'] < 0):
			print('WARNING: phase "%s" is missing, something went wrong!' % p)
			print('    In %s, this dmesg line denotes the start of %s:' % \
				(sysvals.suspendmode, p))
			print('        "%s"' % dm[p])
		if(data.dmesg[p]['start'] < 0):
			data.dmesg[p]['start'] = data.dmesg[lp]['end']
			if(p == 'resume_machine'):
				data.tSuspended = data.dmesg[lp]['end']
				data.tResumed = data.dmesg[lp]['end']
				data.tLow = 0
		if(data.dmesg[p]['end'] < 0):
			data.dmesg[p]['end'] = data.dmesg[p]['start']
		lp = p

	# fill in any actions we've found
	for name in actions:
		for event in actions[name]:
			begin = event['begin']
			end = event['end']
			# if event starts before timeline start, expand timeline
			if(begin < data.start):
				data.setStart(begin)
			# if event ends after timeline end, expand the timeline
			if(end > data.end):
				data.setEnd(end)
			data.newActionGlobal(name, begin, end)

	if(sysvals.verbose):
		data.printDetails()
	if(len(sysvals.devicefilter) > 0):
		data.deviceFilter(sysvals.devicefilter)
	data.fixupInitcallsThatDidntReturn()
	return True

# Function: setTimelineRows
# Description:
#	 Organize the timeline entries into the smallest
#	 number of rows possible, with no entry overlapping
# Arguments:
#	 list: the list of devices/actions for a single phase
#	 sortedkeys: cronologically sorted key list to use
# Output:
#	 The total number of rows needed to display this phase of the timeline
def setTimelineRows(list, sortedkeys):

	# clear all rows and set them to undefined
	remaining = len(list)
	rowdata = dict()
	row = 0
	for item in list:
		list[item]['row'] = -1

	# try to pack each row with as many ranges as possible
	while(remaining > 0):
		if(row not in rowdata):
			rowdata[row] = []
		for item in sortedkeys:
			if(list[item]['row'] < 0):
				s = list[item]['start']
				e = list[item]['end']
				valid = True
				for ritem in rowdata[row]:
					rs = ritem['start']
					re = ritem['end']
					if(not (((s <= rs) and (e <= rs)) or
						((s >= re) and (e >= re)))):
						valid = False
						break
				if(valid):
					rowdata[row].append(list[item])
					list[item]['row'] = row
					remaining -= 1
		row += 1
	return row

# Function: createTimeScale
# Description:
#	 Create the timescale header for the html timeline
# Arguments:
#	 t0: start time (suspend begin)
#	 tMax: end time (resume end)
#	 tSuspend: time when suspend occurs, i.e. the zero time
# Output:
#	 The html code needed to display the time scale
def createTimeScale(t0, tMax, tSuspended):
	timescale = '<div class="t" style="right:{0}%">{1}</div>\n'
	output = '<div id="timescale">\n'

	# set scale for timeline
	tTotal = tMax - t0
	tS = 0.1
	if(tTotal <= 0):
		return output
	if(tTotal > 4):
		tS = 1
	if(tSuspended < 0):
		for i in range(int(tTotal/tS)+1):
			pos = '%0.3f' % (100 - ((float(i)*tS*100)/tTotal))
			if(i > 0):
				val = '%0.fms' % (float(i)*tS*1000)
			else:
				val = ''
			output += timescale.format(pos, val)
	else:
		tSuspend = tSuspended - t0
		divTotal = int(tTotal/tS) + 1
		divSuspend = int(tSuspend/tS)
		s0 = (tSuspend - tS*divSuspend)*100/tTotal
		for i in range(divTotal):
			pos = '%0.3f' % (100 - ((float(i)*tS*100)/tTotal) - s0)
			if((i == 0) and (s0 < 3)):
				val = ''
			elif(i == divSuspend):
				val = 'S/R'
			else:
				val = '%0.fms' % (float(i-divSuspend)*tS*1000)
			output += timescale.format(pos, val)
	output += '</div>\n'
	return output

# Function: createHTMLSummarySimple
# Description:
#	 Create summary html file for a series of tests
# Arguments:
#	 testruns: array of Data objects from parseTraceLog
def createHTMLSummarySimple(testruns, htmlfile):
	global sysvals

	# print out the basic summary of all the tests
	hf = open(htmlfile, 'w')

	# write the html header first (html head, css code, up to body start)
	html = '<!DOCTYPE html>\n<html>\n<head>\n\
	<meta http-equiv="content-type" content="text/html; charset=UTF-8">\n\
	<title>AnalyzeSuspend Summary</title>\n\
	<style type=\'text/css\'>\n\
		body {overflow-y: scroll;}\n\
		.stamp {width: 100%;text-align:center;background-color:#495E09;line-height:30px;color:white;font: 25px Arial;}\n\
		table {width:100%;border-collapse: collapse;}\n\
		.summary {font: 22px Arial;border:1px solid;}\n\
		th {border: 1px solid black;background-color:#A7C942;color:white;}\n\
		td {text-align: center;}\n\
		tr.alt td {background-color:#EAF2D3;}\n\
		tr.avg td {background-color:#BDE34C;}\n\
		a:link {color: #90B521;}\n\
		a:visited {color: #495E09;}\n\
		a:hover {color: #B1DF28;}\n\
		a:active {color: #FFFFFF;}\n\
	</style>\n</head>\n<body>\n'

	# group test header
	count = len(testruns)
	headline_stamp = '<div class="stamp">{0} {1} {2} {3} ({4} tests)</div>\n'
	html += headline_stamp.format(sysvals.stamp['host'],
		sysvals.stamp['kernel'], sysvals.stamp['mode'],
		sysvals.stamp['time'], count)

	# check to see if all the tests have the same value
	stampcolumns = False
	for data in testruns:
		if diffStamp(sysvals.stamp, data.stamp):
			stampcolumns = True
			break

	th = '\t<th>{0}</th>\n'
	td = '\t<td>{0}</td>\n'
	tdlink = '\t<td><a href="{0}">Click Here</a></td>\n'

	# table header
	html += '<table class="summary">\n<tr>\n'
	html += th.format("Test #")
	if stampcolumns:
		html += th.format("Hostname")
		html += th.format("Kernel Version")
		html += th.format("Suspend Mode")
	html += th.format("Test Time")
	html += th.format("Suspend Time")
	html += th.format("Resume Time")
	html += th.format("Detail")
	html += '</tr>\n'

	# test data, 1 row per test
	sTimeAvg = 0.0
	rTimeAvg = 0.0
	num = 1
	for data in testruns:
		# data.end is the end of post_resume
		resumeEnd = data.dmesg['resume_complete']['end']
		if num % 2 == 1:
			html += '<tr class="alt">\n'
		else:
			html += '<tr>\n'

		# test num
		html += td.format("test %d" % num)
		num += 1
		if stampcolumns:
			# host name
			val = "unknown"
			if('host' in data.stamp):
				val = data.stamp['host']
			html += td.format(val)
			# host kernel
			val = "unknown"
			if('kernel' in data.stamp):
				val = data.stamp['kernel']
			html += td.format(val)
			# suspend mode
			val = "unknown"
			if('mode' in data.stamp):
				val = data.stamp['mode']
			html += td.format(val)
		# test time
		val = "unknown"
		if('time' in data.stamp):
			val = data.stamp['time']
		html += td.format(val)
		# suspend time