perf, sched migration: Parameterize cpu height and spacing

Without vertical zoom, it is not possible to see all CPUs in a trace
taken on a larger machine. This patch parameterizes the height and
spacing of CPUs so that you can fit more cpus into the screen.

Ideally we should dynamically size/space the CPU rectangles with some
minimum threshold. Until then, this patch is a stop-gap.

Signed-off-by: Nikhil Rao <ncrao@google.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: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 14 insertions, 9 deletions

diff --git a/tools/perf/scripts/python/sched-migration.py b/tools/perf/scripts/python/sched-migration.py
index 8b8fb7c60991..d9026683027c 100644
--- a/tools/perf/scripts/python/sched-migration.py
+++ b/tools/perf/scripts/python/sched-migration.py
@@ -27,6 +27,11 @@ from perf_trace_context import *
 from Core import *
 
 class RootFrame(wx.Frame):
+        Y_OFFSET = 100
+        CPU_HEIGHT = 100
+        CPU_SPACE = 50
+        EVENT_MARKING_WIDTH = 5
+
         def __init__(self, timeslices, parent = None, id = -1, title = "Migration"):
                 wx.Frame.__init__(self, parent, id, title)
 
@@ -97,8 +102,8 @@ class RootFrame(wx.Frame):
                 if width_px == 0:
                         return
 
-                offset_py = 100 + (cpu * 150)
-                width_py = 100
+                offset_py = RootFrame.Y_OFFSET + (cpu * (RootFrame.CPU_HEIGHT + RootFrame.CPU_SPACE))
+                width_py = RootFrame.CPU_HEIGHT
 
                 if cpu in slice.event_cpus:
                         rgb = rq.event.color()
@@ -107,9 +112,9 @@ class RootFrame(wx.Frame):
                                 color = wx.Colour(r, g, b)
                                 brush = wx.Brush(color, wx.SOLID)
                                 dc.SetBrush(brush)
-                                dc.DrawRectangle(offset_px, offset_py, width_px, 5)
-                                width_py -= 5
-                                offset_py += 5
+                                dc.DrawRectangle(offset_px, offset_py, width_px, RootFrame.EVENT_MARKING_WIDTH)
+                                width_py -= RootFrame.EVENT_MARKING_WIDTH
+                                offset_py += RootFrame.EVENT_MARKING_WIDTH
 
                 red_power = int(0xff - (0xff * load_rate))
                 color = wx.Colour(0xff, red_power, red_power)
@@ -154,11 +159,11 @@ class RootFrame(wx.Frame):
                 self.update_rectangles(dc, start, end)
 
         def cpu_from_ypixel(self, y):
-                y -= 100
-                cpu = y / 150
-                height = y % 150
+                y -= RootFrame.Y_OFFSET
+                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 > 100:
+                if cpu < 0 or cpu > self.max_cpu or height > RootFrame.CPU_HEIGHT:
                         return -1
 
                 return cpu