diff --git a/tools/sched/schedgraph.py b/tools/sched/schedgraph.py
new file mode 100644
index 000000000000..25493a2f2731
--- /dev/null
+++ b/tools/sched/schedgraph.py
@@ -0,0 +1,1209 @@
+#!/usr/local/bin/python
+
+# Copyright (c) 2002-2003, Jeffrey Roberson <jeff@freebsd.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice unmodified, this list of conditions, and the following
+#    disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# $FreeBSD$
+
+import sys
+import re
+from Tkinter import *
+
+# 1)  Add a per-thread summary display
+# 2)  Add bounding box style zoom.
+# 3)  Click to center.
+# 4)  Implement some sorting mechanism.
+
+ticksps = None
+status = None
+configtypes = []
+
+def ticks2sec(ticks):
+	ns = ticksps / 1000000000
+	ticks /= ns
+	if (ticks < 1000):
+		return (str(ticks) + "ns")
+	ticks /= 1000
+	if (ticks < 1000):
+		return (str(ticks) + "us")
+	ticks /= 1000
+	if (ticks < 1000):
+		return (str(ticks) + "ms")
+	ticks /= 1000
+	return (str(ticks) + "s")
+
+class Scaler(Frame):
+	def __init__(self, master, target):
+		Frame.__init__(self, master)
+		self.scale = Scale(self, command=self.scaleset,
+		    from_=1000, to_=1000000, orient=HORIZONTAL, resolution=1000)
+		self.label = Label(self, text="Ticks per pixel")
+		self.label.pack(side=LEFT)
+		self.scale.pack(fill="both", expand=1)
+		self.target = target
+		self.scale.set(target.scaleget())
+		self.initialized = 1
+
+	def scaleset(self, value):
+		self.target.scaleset(int(value))
+
+	def set(self, value):
+		self.scale.set(value)
+
+class Status(Frame):
+	def __init__(self, master):
+		Frame.__init__(self, master)
+		self.label = Label(self, bd=1, relief=SUNKEN, anchor=W)
+		self.label.pack(fill="both", expand=1)
+		self.clear()
+
+	def set(self, str):
+		self.label.config(text=str)
+
+	def clear(self):
+		self.label.config(text="")
+
+	def startup(self, str):
+		self.set(str)
+		root.update()
+
+class EventConf(Frame):
+	def __init__(self, master, name, color, enabled):
+		Frame.__init__(self, master)
+		self.name = name
+		self.color = StringVar()
+		self.color_default = color
+		self.color_current = color
+		self.color.set(color)
+		self.enabled = IntVar()
+		self.enabled_default = enabled
+		self.enabled_current = enabled
+		self.enabled.set(enabled)
+		self.draw()
+
+	def draw(self):
+		self.label = Label(self, text=self.name, anchor=W)
+		self.sample = Canvas(self, width=24, height=24,
+		    bg='grey')
+		self.rect = self.sample.create_rectangle(0, 0, 24, 24,
+		    fill=self.color.get())
+		self.list = OptionMenu(self, self.color,
+		    "dark red", "red", "pink",
+		    "dark orange", "orange",
+		    "yellow", "light yellow",
+		    "dark green", "green", "light green",
+		    "dark blue", "blue", "light blue",
+		    "dark violet", "violet", "purple",
+		    "dark grey", "light grey",
+		    "white", "black",
+		    command=self.setcolor)
+		self.checkbox = Checkbutton(self, text="enabled",
+		    variable=self.enabled)
+		self.label.grid(row=0, column=0, sticky=E+W)
+		self.sample.grid(row=0, column=1)
+		self.list.grid(row=0, column=2, sticky=E+W)
+		self.checkbox.grid(row=0, column=3)
+		self.columnconfigure(0, weight=1)
+		self.columnconfigure(2, minsize=110)
+
+	def setcolor(self, color):
+		self.color.set(color)
+		self.sample.itemconfigure(self.rect, fill=color)
+
+	def apply(self):
+		cchange = 0
+		echange = 0
+		if (self.color_current != self.color.get()):
+			cchange = 1
+		if (self.enabled_current != self.enabled.get()):
+			echange = 1
+		self.color_current = self.color.get()
+		self.enabled_current = self.enabled.get()
+		if (echange != 0):
+			if (self.enabled_current):
+				graph.setcolor(self.name, self.color_current)
+			else:
+				graph.hide(self.name)
+			return
+		if (cchange != 0):
+			graph.setcolor(self.name, self.color_current)
+
+	def revert(self):
+		self.setcolor(self.color_current)
+		self.enabled.set(self.enabled_current)
+
+	def default(self):
+		self.setcolor(self.color_default)
+		self.enabled.set(self.enabled_default)
+
+class EventConfigure(Toplevel):
+	def __init__(self):
+		Toplevel.__init__(self)
+		self.resizable(0, 0)
+		self.title("Event Configuration")
+		self.items = LabelFrame(self, text="Event Type")
+		self.buttons = Frame(self)
+		self.drawbuttons()
+		self.items.grid(row=0, column=0, sticky=E+W)
+		self.columnconfigure(0, weight=1)
+		self.buttons.grid(row=1, column=0, sticky=E+W)
+		self.types = []
+		self.irow = 0
+		for type in configtypes:
+			self.additem(type.name, type.color, type.enabled)
+
+	def additem(self, name, color, enabled=1):
+		item = EventConf(self.items, name, color, enabled)
+		self.types.append(item)
+		item.grid(row=self.irow, column=0, sticky=E+W)
+		self.irow += 1
+
+	def drawbuttons(self):
+		self.apply = Button(self.buttons, text="Apply",
+		    command=self.apress)
+		self.revert = Button(self.buttons, text="Revert",
+		    command=self.rpress)
+		self.default = Button(self.buttons, text="Default",
+		    command=self.dpress)
+		self.apply.grid(row=0, column=0, sticky=E+W)
+		self.revert.grid(row=0, column=1, sticky=E+W)
+		self.default.grid(row=0, column=2, sticky=E+W)
+		self.buttons.columnconfigure(0, weight=1)
+		self.buttons.columnconfigure(1, weight=1)
+		self.buttons.columnconfigure(2, weight=1)
+
+	def apress(self):
+		for item in self.types:
+			item.apply()
+
+	def rpress(self):
+		for item in self.types:
+			item.revert()
+
+	def dpress(self):
+		for item in self.types:
+			item.default()
+
+class EventView(Toplevel):
+	def __init__(self, event, canvas):
+		Toplevel.__init__(self)
+		self.resizable(0, 0)
+		self.title("Event")
+		self.event = event
+		self.frame = Frame(self)
+		self.frame.grid(row=0, column=0, sticky=N+S+E+W)
+		self.buttons = Frame(self)
+		self.buttons.grid(row=1, column=0, sticky=E+W)
+		self.canvas = canvas
+		self.drawlabels()
+		self.drawbuttons()
+		event.displayref(canvas)
+		self.bind("<Destroy>", self.destroycb)
+
+	def destroycb(self, event):
+		self.unbind("<Destroy>")
+		if (self.event != None):
+			self.event.displayunref(self.canvas)
+			self.event = None
+		self.destroy()
+
+	def clearlabels(self):
+		for label in self.frame.grid_slaves():
+			label.grid_remove()
+
+	def drawlabels(self):
+		ypos = 0
+		labels = self.event.labels()
+		while (len(labels) < 7):
+			labels.append(("", "", 0))
+		for label in labels:
+			name, value, linked = label
+			l = Label(self.frame, text=name, bd=1, width=15,
+			    relief=SUNKEN, anchor=W)
+			if (linked):
+				fgcolor = "blue"
+			else:
+				fgcolor = "black"
+			r = Label(self.frame, text=value, bd=1,
+			    relief=SUNKEN, anchor=W, fg=fgcolor)
+			l.grid(row=ypos, column=0, sticky=E+W)
+			r.grid(row=ypos, column=1, sticky=E+W)
+			if (linked):
+				r.bind("<Button-1>", self.linkpress)
+			ypos += 1
+		self.frame.columnconfigure(1, minsize=80)
+
+	def drawbuttons(self):
+		self.back = Button(self.buttons, text="<", command=self.bpress)
+		self.forw = Button(self.buttons, text=">", command=self.fpress)
+		self.new = Button(self.buttons, text="new", command=self.npress)
+		self.back.grid(row=0, column=0, sticky=E+W)
+		self.forw.grid(row=0, column=1, sticky=E+W)
+		self.new.grid(row=0, column=2, sticky=E+W)
+		self.buttons.columnconfigure(2, weight=1)
+
+	def newevent(self, event):
+		self.event.displayunref(self.canvas)
+		self.clearlabels()
+		self.event = event
+		self.event.displayref(self.canvas)
+		self.drawlabels()
+
+	def npress(self):
+		EventView(self.event, self.canvas)
+
+	def bpress(self):
+		prev = self.event.prev()
+		if (prev == None):
+			return
+		while (prev.real == 0):
+			prev = prev.prev()
+			if (prev == None):
+				return
+		self.newevent(prev)
+
+	def fpress(self):
+		next = self.event.next()
+		if (next == None):
+			return
+		while (next.real == 0):
+			next = next.next()
+			if (next == None):
+				return
+		self.newevent(next)
+
+	def linkpress(self, wevent):
+		event = self.event.getlinked()
+		if (event != None):
+			self.newevent(event)
+
+class Event:
+	name = "none"
+	color = "grey"
+	def __init__(self, source, cpu, timestamp, last=0):
+		self.source = source
+		self.cpu = cpu
+		self.timestamp = int(timestamp)
+		self.entries = []
+		self.real = 1
+		self.idx = None
+		self.state = 0
+		self.item = None
+		self.dispcnt = 0
+		self.linked = None
+		if (last):
+			source.lastevent(self)
+		else:
+			source.event(self)
+
+	def status(self):
+		statstr = self.name + " " + self.source.name
+		statstr += " on: cpu" + str(self.cpu)
+		statstr += " at: " + str(self.timestamp)
+		statstr += self.stattxt()
+		status.set(statstr)
+
+	def stattxt(self):
+		return ""
+
+	def textadd(self, tuple):
+		pass
+		self.entries.append(tuple)
+
+	def labels(self):
+		return [("Source:", self.source.name, 0),
+				("Event:", self.name, 0),
+				("CPU:", self.cpu, 0),
+				("Timestamp:", self.timestamp, 0)] + self.entries
+	def mouseenter(self, canvas, item):
+		self.displayref(canvas)
+		self.status()
+
+	def mouseexit(self, canvas, item):
+		self.displayunref(canvas)
+		status.clear()
+
+	def mousepress(self, canvas, item):
+		EventView(self, canvas)
+
+	def next(self):
+		return self.source.eventat(self.idx + 1)
+
+	def prev(self):
+		return self.source.eventat(self.idx - 1)
+
+	def displayref(self, canvas):
+		if (self.dispcnt == 0):
+			canvas.itemconfigure(self.item, width=2)
+		self.dispcnt += 1
+
+	def displayunref(self, canvas):
+		self.dispcnt -= 1
+		if (self.dispcnt == 0):
+			canvas.itemconfigure(self.item, width=0)
+			canvas.tag_raise("point", "state")
+
+	def getlinked(self):
+		return self.linked.findevent(self.timestamp)
+
+class PointEvent(Event):
+	def __init__(self, thread, cpu, timestamp, last=0):
+		Event.__init__(self, thread, cpu, timestamp, last)
+
+	def draw(self, canvas, xpos, ypos):
+		l = canvas.create_oval(xpos - 6, ypos + 1, xpos + 6, ypos - 11,
+		    fill=self.color, tags=("all", "point", "event")
+		    + (self.name,), width=0)
+		canvas.events[l] = self
+		self.item = l
+		if (self.enabled == 0):
+			canvas.itemconfigure(l, state="hidden")
+
+		return (xpos)
+
+class StateEvent(Event):
+	def __init__(self, thread, cpu, timestamp, last=0):
+		Event.__init__(self, thread, cpu, timestamp, last)
+		self.duration = 0
+		self.skipnext = 0
+		self.skipself = 0
+		self.state = 1
+
+	def draw(self, canvas, xpos, ypos):
+		next = self.nextstate()
+		if (self.skipself == 1 or next == None):
+			return (xpos)
+		if (self.skipnext):
+			skipped = next
+			next.skipself = 1
+			next.real = 0
+			next = next.nextstate()
+			if (next == None):
+				next = skipped
+		self.duration = next.timestamp - self.timestamp
+		delta = self.duration / canvas.ratio
+		l = canvas.create_rectangle(xpos, ypos,
+		    xpos + delta, ypos - 10, fill=self.color, width=0,
+		    tags=("all", "state", "event") + (self.name,))
+		canvas.events[l] = self
+		self.item = l
+		if (self.enabled == 0):
+			canvas.itemconfigure(l, state="hidden")
+
+		return (xpos + delta)
+
+	def stattxt(self):
+		return " duration: " + ticks2sec(self.duration)
+
+	def nextstate(self):
+		next = self.next()
+		while (next != None and next.state == 0):
+			next = next.next()
+		return (next)
+
+	def labels(self):
+		return [("Source:", self.source.name, 0),
+				("Event:", self.name, 0),
+				("Timestamp:", self.timestamp, 0),
+				("CPU:", self.cpu, 0),
+				("Duration:", ticks2sec(self.duration), 0)] \
+				 + self.entries
+
+class Count(Event):
+	name = "Count"
+	color = "red"
+	enabled = 1
+	def __init__(self, source, cpu, timestamp, count):
+		self.count = int(count)
+		Event.__init__(self, source, cpu, timestamp)
+		self.duration = 0
+		self.textadd(("count:", self.count, 0))
+
+	def draw(self, canvas, xpos, ypos):
+		next = self.next()
+		self.duration = next.timestamp - self.timestamp
+		delta = self.duration / canvas.ratio
+		yhight = self.source.yscale() * self.count
+		l = canvas.create_rectangle(xpos, ypos - yhight,
+		    xpos + delta, ypos, fill=self.color, width=0,
+		    tags=("all", "count", "event") + (self.name,))
+		canvas.events[l] = self
+		self.item = l
+		if (self.enabled == 0):
+			canvas.itemconfigure(l, state="hidden")
+		return (xpos + delta)
+
+	def stattxt(self):
+		return " count: " + str(self.count)
+
+configtypes.append(Count)
+
+class Running(StateEvent):
+	name = "running"
+	color = "green"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Running)
+
+class Idle(StateEvent):
+	name = "idle"
+	color = "grey"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Idle)
+
+class Yielding(StateEvent):
+	name = "yielding"
+	color = "yellow"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Yielding)
+
+class Swapped(StateEvent):
+	name = "swapped"
+	color = "violet"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Swapped)
+
+class Suspended(StateEvent):
+	name = "suspended"
+	color = "purple"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Suspended)
+
+class Iwait(StateEvent):
+	name = "iwait"
+	color = "grey"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Iwait)
+
+class Preempted(StateEvent):
+	name = "preempted"
+	color = "red"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio, bythread):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.skipnext = 1
+		self.prio = prio
+		self.linked = bythread
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("by thread:", self.linked.name, 1))
+
+configtypes.append(Preempted)
+
+class Sleep(StateEvent):
+	name = "sleep"
+	color = "blue"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio, wmesg):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.wmesg = wmesg
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("wmesg:", self.wmesg, 0))
+
+	def stattxt(self):
+		statstr = StateEvent.stattxt(self)
+		statstr += " sleeping on: " + self.wmesg
+		return (statstr)
+
+configtypes.append(Sleep)
+
+class Blocked(StateEvent):
+	name = "blocked"
+	color = "dark red"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio, lock):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.lock = lock
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("lock:", self.lock, 0))
+
+	def stattxt(self):
+		statstr = StateEvent.stattxt(self)
+		statstr += " blocked on: " + self.lock
+		return (statstr)
+
+configtypes.append(Blocked)
+
+class KsegrpRunq(StateEvent):
+	name = "KsegrpRunq"
+	color = "orange"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio, bythread):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.linked = bythread
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("by thread:", self.linked.name, 1))
+
+configtypes.append(KsegrpRunq)
+
+class Runq(StateEvent):
+	name = "Runq"
+	color = "yellow"
+	enabled = 1
+	def __init__(self, thread, cpu, timestamp, prio, bythread):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.linked = bythread
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("by thread:", self.linked.name, 1))
+
+configtypes.append(Runq)
+
+class Sched_exit(StateEvent):
+	name = "exit"
+	color = "grey"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio):
+		StateEvent.__init__(self, thread, cpu, timestamp)
+		self.name = "sched_exit"
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Sched_exit)
+
+class Padevent(StateEvent):
+	def __init__(self, thread, cpu, timestamp, last=0):
+		StateEvent.__init__(self, thread, cpu, timestamp, last)
+		self.name = "pad"
+		self.real = 0
+
+	def draw(self, canvas, xpos, ypos):
+		next = self.next()
+		if (next == None):
+			return (xpos)
+		self.duration = next.timestamp - self.timestamp
+		delta = self.duration / canvas.ratio
+		return (xpos + delta)
+
+class Tick(PointEvent):
+	name = "tick"
+	color = "black"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio, stathz):
+		PointEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.textadd(("prio:", self.prio, 0))
+
+configtypes.append(Tick)
+
+class Prio(PointEvent):
+	name = "prio"
+	color = "black"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio, newprio, bythread):
+		PointEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.newprio = newprio
+		self.linked = bythread
+		self.textadd(("new prio:", self.newprio, 0))
+		self.textadd(("prio:", self.prio, 0))
+		if (self.linked != self.source):
+			self.textadd(("by thread:", self.linked.name, 1))
+		else:
+			self.textadd(("by thread:", self.linked.name, 0))
+
+configtypes.append(Prio)
+
+class Lend(PointEvent):
+	name = "lend"
+	color = "black"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, prio, tothread):
+		PointEvent.__init__(self, thread, cpu, timestamp)
+		self.prio = prio
+		self.linked = tothread
+		self.textadd(("prio:", self.prio, 0))
+		self.textadd(("to thread:", self.linked.name, 1))
+
+configtypes.append(Lend)
+
+class Wokeup(PointEvent):
+	name = "wokeup"
+	color = "black"
+	enabled = 0
+	def __init__(self, thread, cpu, timestamp, ranthread):
+		PointEvent.__init__(self, thread, cpu, timestamp)
+		self.linked = ranthread
+		self.textadd(("ran thread:", self.linked.name, 1))
+
+configtypes.append(Wokeup)
+
+class EventSource:
+	def __init__(self, name):
+		self.name = name
+		self.events = []
+		self.cpu = 0
+		self.cpux = 0
+
+	def fixup(self):
+		pass
+
+	def event(self, event):
+		self.events.insert(0, event)
+
+	def remove(self, event):
+		self.events.remove(event)
+
+	def lastevent(self, event):
+		self.events.append(event)
+
+	def draw(self, canvas, ypos):
+		xpos = 10
+		self.cpux = 10
+		self.cpu = self.events[1].cpu
+		for i in range(0, len(self.events)):
+			self.events[i].idx = i
+		for event in self.events:
+			if (event.cpu != self.cpu and event.cpu != -1):
+				self.drawcpu(canvas, xpos, ypos)
+				self.cpux = xpos
+				self.cpu = event.cpu
+			xpos = event.draw(canvas, xpos, ypos)
+		self.drawcpu(canvas, xpos, ypos)
+
+	def drawname(self, canvas, ypos):
+		ypos = ypos - (self.ysize() / 2)
+		canvas.create_text(10, ypos, anchor="w", text=self.name)
+
+	def drawcpu(self, canvas, xpos, ypos):
+		cpu = int(self.cpu)
+		if (cpu == 0):
+			color = 'light grey'
+		elif (cpu == 1):
+			color = 'dark grey'
+		elif (cpu == 2):
+			color = 'light blue'
+		elif (cpu == 3):
+			color == 'light green'
+		else:
+			color == "white"
+		l = canvas.create_rectangle(self.cpux,
+		    ypos - self.ysize() - canvas.bdheight,
+		    xpos, ypos + canvas.bdheight, fill=color, width=0,
+		    tags=("all", "cpuinfo"))
+
+	def ysize(self):
+		return (None)
+
+	def eventat(self, i):
+		if (i >= len(self.events)):
+			return (None)
+		event = self.events[i]
+		return (event)
+
+	def findevent(self, timestamp):
+		for event in self.events:
+			if (event.timestamp >= timestamp and event.real):
+				return (event)
+		return (None)
+
+class Thread(EventSource):
+	names = {}
+	def __init__(self, td, pcomm):
+		EventSource.__init__(self, pcomm)
+		self.str = td
+		try:
+			cnt = Thread.names[pcomm]
+		except:
+			Thread.names[pcomm] = 0
+			return
+		Thread.names[pcomm] = cnt + 1
+
+	def fixup(self):
+		cnt = Thread.names[self.name]
+		if (cnt == 0):
+			return
+		cnt -= 1
+		Thread.names[self.name] = cnt
+		self.name += " td" + str(cnt)
+
+	def ysize(self):
+		return (10)
+
+class Counter(EventSource):
+	max = 0
+	def __init__(self, name):
+		EventSource.__init__(self, name)
+
+	def event(self, event):
+		EventSource.event(self, event)
+		try:
+			count = event.count
+		except:
+			return
+		count = int(count)
+		if (count > Counter.max):
+			Counter.max = count
+
+	def ysize(self):
+		return (80)
+
+	def yscale(self):
+		return (self.ysize() / Counter.max)
+
+
+class KTRFile:
+	def __init__(self, file):
+		self.timestamp_first = None
+		self.timestamp_last = None
+		self.lineno = -1
+		self.threads = []
+		self.sources = []
+		self.ticks = {}
+		self.load = {}
+
+		self.parse(file)
+		self.fixup()
+		global ticksps
+		ticksps = self.ticksps()
+
+	def parse(self, file):
+		try:
+			ifp = open(file)
+		except:
+			print "Can't open", file
+			sys.exit(1)
+
+		ktrhdr = "\s+\d+\s+(\d+)\s+(\d+)\s+"
+		tdname = "(\S+)\(([^)]*)\)"
+
+		ktrstr = "mi_switch: " + tdname
+		ktrstr += " prio (\d+) inhibit (\d+) wmesg (\S+) lock (\S+)"
+		switchout_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "mi_switch: " + tdname + " prio (\d+) idle"
+		idled_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "mi_switch: " + tdname + " prio (\d+) preempted by "
+		ktrstr += tdname
+		preempted_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "mi_switch: running " + tdname + " prio (\d+)"
+		switchin_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "sched_add: " + tdname + " prio (\d+) by " + tdname
+		sched_add_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "setrunqueue: " + tdname + " prio (\d+) by " + tdname
+		setrunqueue_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "sched_rem: " + tdname + " prio (\d+) by " + tdname
+		sched_rem_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "sched_exit_thread: " + tdname + " prio (\d+)"
+		sched_exit_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "statclock: " + tdname + " prio (\d+)"
+		ktrstr += " stathz (\d+)"
+		sched_clock_re = re.compile(ktrhdr + ktrstr)
+
+		ktrstr = "sched_prio: " + tdname + " prio (\d+)"
+		ktrstr += " newprio (\d+) by " + tdname
+		sched_prio_re = re.compile(ktrhdr + ktrstr)
+
+		cpuload_re = re.compile(ktrhdr + "load: (\d)")
+		loadglobal_re = re.compile(ktrhdr + "global load: (\d)")
+
+		parsers = [[cpuload_re, self.cpuload],
+			   [loadglobal_re, self.loadglobal],
+			   [switchin_re, self.switchin],
+			   [switchout_re, self.switchout],
+			   [sched_add_re, self.sched_add],
+			   [setrunqueue_re, self.sched_rem],
+			   [sched_prio_re, self.sched_prio],
+			   [preempted_re, self.preempted],
+			   [sched_rem_re, self.sched_rem],
+			   [sched_exit_re, self.sched_exit],
+			   [sched_clock_re, self.sched_clock],
+			   [idled_re, self.idled]]
+
+		for line in ifp.readlines():
+			self.lineno += 1
+			if ((self.lineno % 1024) == 0):
+				status.startup("Parsing line " +
+				    str(self.lineno))
+			for p in parsers:
+				m = p[0].match(line)
+				if (m != None):
+					p[1](*m.groups())
+					break
+			# if (m == None):
+			# 	print line,
+
+	def checkstamp(self, timestamp):
+		timestamp = int(timestamp)
+		if (self.timestamp_first == None):
+			self.timestamp_first = timestamp
+		if (timestamp > self.timestamp_first):
+			print "Bad timestamp on line ", self.lineno
+			return (0)
+		self.timestamp_last = timestamp
+		return (1)
+
+	def timespan(self):
+		return (self.timestamp_first - self.timestamp_last);
+
+	def ticksps(self):
+		return (self.timespan() / self.ticks[0]) * int(self.stathz)
+
+	def switchout(self, cpu, timestamp, td, pcomm, prio, inhibit, wmesg, lock):
+		TDI_SUSPENDED = 0x0001
+		TDI_SLEEPING = 0x0002
+		TDI_SWAPPED = 0x0004
+		TDI_LOCK = 0x0008
+		TDI_IWAIT = 0x0010 
+
+		if (self.checkstamp(timestamp) == 0):
+			return
+		inhibit = int(inhibit)
+		thread = self.findtd(td, pcomm)
+		if (inhibit & TDI_SWAPPED):
+			Swapped(thread, cpu, timestamp, prio)
+		elif (inhibit & TDI_SLEEPING):
+			Sleep(thread, cpu, timestamp, prio, wmesg)
+		elif (inhibit & TDI_LOCK):
+			Blocked(thread, cpu, timestamp, prio, lock)
+		elif (inhibit & TDI_IWAIT):
+			Iwait(thread, cpu, timestamp, prio)
+		elif (inhibit & TDI_SUSPENDED):
+			Suspended(thread, cpu, timestamp, prio)
+		elif (inhibit == 0):
+			Yielding(thread, cpu, timestamp, prio)
+		else:
+			print "Unknown event", inhibit
+			sys.exit(1)
+		
+	def idled(self, cpu, timestamp, td, pcomm, prio):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		Idle(thread, cpu, timestamp, prio)
+
+	def preempted(self, cpu, timestamp, td, pcomm, prio, bytd, bypcomm):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		Preempted(thread, cpu, timestamp, prio,
+		    self.findtd(bytd, bypcomm))
+
+	def switchin(self, cpu, timestamp, td, pcomm, prio):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		Running(thread, cpu, timestamp, prio)
+
+	def sched_add(self, cpu, timestamp, td, pcomm, prio, bytd, bypcomm):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		bythread = self.findtd(bytd, bypcomm)
+		Runq(thread, cpu, timestamp, prio, bythread)
+		Wokeup(bythread, cpu, timestamp, thread)
+
+	def sched_rem(self, cpu, timestamp, td, pcomm, prio, bytd, bypcomm):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		KsegrpRunq(thread, cpu, timestamp, prio,
+		    self.findtd(bytd, bypcomm))
+
+	def sched_exit(self, cpu, timestamp, td, pcomm, prio):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		Sched_exit(thread, cpu, timestamp, prio)
+
+	def sched_clock(self, cpu, timestamp, td, pcomm, prio, stathz):
+		if (self.checkstamp(timestamp) == 0):
+			return
+		self.stathz = stathz
+		cpu = int(cpu)
+		try:
+			ticks = self.ticks[cpu]
+		except:
+			self.ticks[cpu] = 0
+		self.ticks[cpu] += 1
+		thread = self.findtd(td, pcomm)
+		Tick(thread, cpu, timestamp, prio, stathz)
+
+	def sched_prio(self, cpu, timestamp, td, pcomm, prio, newprio, bytd, bypcomm):
+		if (prio == newprio):
+			return
+		if (self.checkstamp(timestamp) == 0):
+			return
+		thread = self.findtd(td, pcomm)
+		bythread = self.findtd(bytd, bypcomm)
+		Prio(thread, cpu, timestamp, prio, newprio, bythread)
+		Lend(bythread, cpu, timestamp, newprio, thread)
+
+	def cpuload(self, cpu, timestamp, count):
+		cpu = int(cpu)
+		try:
+			load = self.load[cpu]
+		except:
+			load = Counter("cpu" + str(cpu) + " load")
+			self.load[cpu] = load
+			self.sources.insert(0, load)
+		Count(load, cpu, timestamp, count)
+
+	def loadglobal(self, cpu, timestamp, count):
+		cpu = 0
+		try:
+			load = self.load[cpu]
+		except:
+			load = Counter("CPU load")
+			self.load[cpu] = load
+			self.sources.insert(0, load)
+		Count(load, cpu, timestamp, count)
+
+	def findtd(self, td, pcomm):
+		for thread in self.threads:
+			if (thread.str == td and thread.name == pcomm):
+				return thread
+		thread = Thread(td, pcomm)
+		self.threads.append(thread)
+		self.sources.append(thread)
+		return (thread)
+
+	def fixup(self):
+		for source in self.sources:
+			Padevent(source, -1, self.timestamp_last)
+			Padevent(source, -1, self.timestamp_first, last=1)
+			source.fixup()
+
+class SchedDisplay(Canvas):
+	def __init__(self, master):
+		self.ratio = 1
+		self.ktrfile = None
+		self.sources = None
+		self.bdheight = 10 
+		self.events = {}
+
+		Canvas.__init__(self, master, width=800, height=500, bg='grey',
+		     scrollregion=(0, 0, 800, 500))
+
+	def setfile(self, ktrfile):
+		self.ktrfile = ktrfile
+		self.sources = ktrfile.sources
+
+	def draw(self):
+		ypos = 0
+		xsize = self.xsize()
+		for source in self.sources:
+			status.startup("Drawing " + source.name)
+			self.create_line(0, ypos, xsize, ypos,
+			    width=1, fill="black", tags=("all",))
+			ypos += self.bdheight
+			ypos += source.ysize()
+			source.draw(self, ypos)
+			ypos += self.bdheight
+			try:
+				self.tag_raise("point", "state")
+				self.tag_lower("cpuinfo", "all")
+			except:
+				pass
+		self.create_line(0, ypos, xsize, ypos,
+		    width=1, fill="black", tags=("all",))
+		self.tag_bind("event", "<Enter>", self.mouseenter)
+		self.tag_bind("event", "<Leave>", self.mouseexit)
+		self.tag_bind("event", "<Button-1>", self.mousepress)
+
+	def mouseenter(self, event):
+		item, = self.find_withtag(CURRENT)
+		event = self.events[item]
+		event.mouseenter(self, item)
+
+	def mouseexit(self, event):
+		item, = self.find_withtag(CURRENT)
+		event = self.events[item]
+		event.mouseexit(self, item)
+
+	def mousepress(self, event):
+		item, = self.find_withtag(CURRENT)
+		event = self.events[item]
+		event.mousepress(self, item)
+
+	def drawnames(self, canvas):
+		status.startup("Drawing names")
+		ypos = 0
+		canvas.configure(scrollregion=(0, 0,
+		    canvas["width"], self.ysize()))
+		for source in self.sources:
+			canvas.create_line(0, ypos, canvas["width"], ypos,
+			    width=1, fill="black", tags=("all",))
+			ypos += self.bdheight
+			ypos += source.ysize()
+			source.drawname(canvas, ypos)
+			ypos += self.bdheight
+		canvas.create_line(0, ypos, canvas["width"], ypos,
+		    width=1, fill="black", tags=("all",))
+
+	def xsize(self):
+		return ((self.ktrfile.timespan() / self.ratio) + 20)
+
+	def ysize(self):
+		ysize = 0
+		for source in self.sources:
+			ysize += source.ysize() + (self.bdheight * 2)
+		return (ysize)
+
+	def scaleset(self, ratio):
+		if (self.ktrfile == None):
+			return
+		oldratio = self.ratio
+		xstart, ystart = self.xview()
+		length = (float(self["width"]) / self.xsize())
+		middle = xstart + (length / 2)
+
+		self.ratio = ratio
+		self.configure(scrollregion=(0, 0, self.xsize(), self.ysize()))
+		self.scale("all", 0, 0, float(oldratio) / ratio, 1)
+
+		length = (float(self["width"]) / self.xsize())
+		xstart = middle - (length / 2)
+		self.xview_moveto(xstart)
+
+	def scaleget(self):
+		return self.ratio
+
+	def setcolor(self, tag, color):
+		self.itemconfigure(tag, state="normal", fill=color)
+
+	def hide(self, tag):
+		self.itemconfigure(tag, state="hidden")
+
+class GraphMenu(Frame):
+	def __init__(self, master):
+		Frame.__init__(self, master, bd=2, relief=RAISED)
+		self.view = Menubutton(self, text="Configure")
+		self.viewmenu = Menu(self.view, tearoff=0)
+		self.viewmenu.add_command(label="Events",
+		    command=self.econf)
+		self.view["menu"] = self.viewmenu
+		self.view.pack(side=LEFT)
+
+	def econf(self):
+		EventConfigure()
+
+
+class SchedGraph(Frame):
+	def __init__(self, master):
+		Frame.__init__(self, master)
+		self.menu = None
+		self.names = None
+		self.display = None
+		self.scale = None
+		self.status = None
+		self.pack(expand=1, fill="both")
+		self.buildwidgets()
+		self.layout()
+		self.draw(sys.argv[1])
+
+	def buildwidgets(self):
+		global status
+		self.menu = GraphMenu(self)
+		self.display = SchedDisplay(self)
+		self.names = Canvas(self,
+		    width=100, height=self.display["height"],
+		    bg='grey', scrollregion=(0, 0, 50, 100))
+		self.scale = Scaler(self, self.display)
+		status = self.status = Status(self)
+		self.scrollY = Scrollbar(self, orient="vertical",
+		    command=self.display_yview)
+		self.display.scrollX = Scrollbar(self, orient="horizontal",
+		    command=self.display.xview)
+		self.display["xscrollcommand"] = self.display.scrollX.set
+		self.display["yscrollcommand"] = self.scrollY.set
+		self.names["yscrollcommand"] = self.scrollY.set
+
+	def layout(self):
+		self.columnconfigure(1, weight=1)
+		self.rowconfigure(1, weight=1)
+		self.menu.grid(row=0, column=0, columnspan=3, sticky=E+W)
+		self.names.grid(row=1, column=0, sticky=N+S)
+		self.display.grid(row=1, column=1, sticky=W+E+N+S)
+		self.scrollY.grid(row=1, column=2, sticky=N+S)
+		self.display.scrollX.grid(row=2, column=0, columnspan=2,
+		    sticky=E+W)
+		self.scale.grid(row=3, column=0, columnspan=3, sticky=E+W)
+		self.status.grid(row=4, column=0, columnspan=3, sticky=E+W)
+
+	def draw(self, file):
+		self.master.update()
+		ktrfile = KTRFile(file)
+		self.display.setfile(ktrfile)
+		self.display.drawnames(self.names)
+		self.display.draw()
+		self.scale.set(250000)
+		self.display.xview_moveto(0)
+
+	def display_yview(self, *args):
+		self.names.yview(*args)
+		self.display.yview(*args)
+
+	def setcolor(self, tag, color):
+		self.display.setcolor(tag, color)
+
+	def hide(self, tag):
+		self.display.hide(tag)
+
+if (len(sys.argv) != 2):
+	print "usage:", sys.argv[0], "<ktr file>"
+	sys.exit(1)
+
+root = Tk()
+root.title("Scheduler Graph")
+graph = SchedGraph(root)
+root.mainloop()