perf, sched migration: Make it vertically scrollable

With scheduler traces covering more than two cpus, rectangles
of the CPUs 3 and more are not visibles.

This makes the vertical navigation scrollable so that all of the
CPUs rectangles are available.

We also want to be able to zoom vertically, so that we can fit at
best the screen with CPU rectangles, but that's for later.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Nikhil Rao <ncrao@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>

tools/perf/scripts/python/sched-migration.py

@@ -43,18 +43,20 @@ class RootFrame(wx.Frame):
 		self.timeslices = timeslices
 		(self.ts_start, self.ts_end) = timeslices.interval()
 		self.update_width_virtual()
+		self.nr_cpus = timeslices.max_cpu() + 1
+		self.height_virtual = RootFrame.Y_OFFSET + (self.nr_cpus * (RootFrame.CPU_HEIGHT + RootFrame.CPU_SPACE))
 
 		# whole window panel
 		self.panel = wx.Panel(self, size=(self.screen_width, self.screen_height))
 
 		# scrollable container
 		self.scroll = wx.ScrolledWindow(self.panel)
-		self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale, self.width_virtual / self.scroll_scale, 100 / 10)
+		self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale, self.width_virtual / self.scroll_scale, self.height_virtual / self.scroll_scale)
 		self.scroll.EnableScrolling(True, True)
 		self.scroll.SetFocus()
 
 		# scrollable drawing area
-		self.scroll_panel = wx.Panel(self.scroll, size=(self.screen_width, self.screen_height / 2))
+		self.scroll_panel = wx.Panel(self.scroll, size=(self.screen_width - 15, self.screen_height / 2))
 		self.scroll_panel.Bind(wx.EVT_PAINT, self.on_paint)
 		self.scroll_panel.Bind(wx.EVT_KEY_DOWN, self.on_key_press)
 		self.scroll_panel.Bind(wx.EVT_LEFT_DOWN, self.on_mouse_down)
@@ -65,9 +67,8 @@ class RootFrame(wx.Frame):
 		self.scroll.Fit()
 		self.Fit()
 
-		self.scroll_panel.SetDimensions(-1, -1, self.width_virtual, -1, wx.SIZE_USE_EXISTING)
+		self.scroll_panel.SetDimensions(-1, -1, self.width_virtual, self.height_virtual, wx.SIZE_USE_EXISTING)
 
-		self.max_cpu = -1
 		self.txt = None
 
 		self.Show(True)
@@ -143,8 +144,6 @@ class RootFrame(wx.Frame):
 
 			for cpu in timeslice.rqs:
 				self.update_rectangle_cpu(dc, timeslice, cpu, self.timeslices[0].start)
-				if cpu > self.max_cpu:
-					self.max_cpu = cpu
 
 	def on_paint(self, event):
 		color = wx.Colour(0xff, 0xff, 0xff)
@@ -163,7 +162,7 @@ class RootFrame(wx.Frame):
 		cpu = y / (RootFrame.CPU_HEIGHT + RootFrame.CPU_SPACE)
 		height = y % (RootFrame.CPU_HEIGHT + RootFrame.CPU_SPACE)
 
-		if cpu < 0 or cpu > self.max_cpu or height > RootFrame.CPU_HEIGHT:
+		if cpu < 0 or cpu > self.nr_cpus - 1 or height > RootFrame.CPU_HEIGHT:
 			return -1
 
 		return cpu
@@ -206,7 +205,7 @@ class RootFrame(wx.Frame):
 		self.update_width_virtual()
 		(xpos, ypos) = self.scroll.GetViewStart()
 		xpos = self.us_to_px(x) / self.scroll_scale
-		self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale, self.width_virtual / self.scroll_scale, 100 / 10, xpos, ypos)
+		self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale, self.width_virtual / self.scroll_scale, self.height_virtual / self.scroll_scale, xpos, ypos)
 		self.Refresh()
 
 	def zoom_in(self):
@@ -234,7 +233,11 @@ class RootFrame(wx.Frame):
 		if key == wx.WXK_RIGHT:
 			self.scroll.Scroll(x + 1, y)
 		elif key == wx.WXK_LEFT:
-			self.scroll.Scroll(x -1, y)
+			self.scroll.Scroll(x - 1, y)
+		elif key == wx.WXK_DOWN:
+			self.scroll.Scroll(x, y + 1)
+		elif key == wx.WXK_UP:
+			self.scroll.Scroll(x, y - 1)
 
 
 threads = { 0 : "idle"}
@@ -504,6 +507,14 @@ class TimeSliceList(UserList):
 
 		return (self.data[0].start, self.data[-1].end)
 
+	def max_cpu(self):
+		last_ts = self.data[-1]
+		max_cpu = 0
+		for cpu in last_ts.rqs:
+			if cpu > max_cpu:
+				max_cpu = cpu
+		return max_cpu
+
 
 class SchedEventProxy:
 	def __init__(self):