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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
# SchedGui.py - Python extension for perf script, basic GUI code for
# traces drawing and overview.
#
# Copyright (C) 2010 by Frederic Weisbecker <fweisbec@gmail.com>
#
# Ported to modern directory structure.
"""SchedGui.py - Python extension for perf script, basic GUI code for traces drawing and overview."""
from __future__ import annotations
import importlib
from typing import Any
class _DummyWx:
"""Dummy wx module fallback when wxPython is not installed."""
Frame = object
try:
wx: Any = importlib.import_module("wx")
WX_AVAILABLE = True
except ImportError:
wx = _DummyWx
WX_AVAILABLE = False
class RootFrame(wx.Frame):
"""Main window frame for scheduling trace visualization."""
Y_OFFSET = 100
RECT_HEIGHT = 100
RECT_SPACE = 50
EVENT_MARKING_WIDTH = 5
def __init__(self, sched_tracer, title, parent=None, win_id=-1):
if not WX_AVAILABLE:
raise ImportError("You need to install the wxpython lib for this script")
wx.Frame.__init__(self, parent, win_id, title)
self.dc = None
(self.screen_width, self.screen_height) = wx.GetDisplaySize()
self.screen_width -= 10
self.screen_height -= 10
self.zoom = 0.5
self.scroll_scale = 20
self.sched_tracer = sched_tracer
self.sched_tracer.set_root_win(self)
(self.ts_start, self.ts_end) = sched_tracer.interval()
self.update_width_virtual()
self.nr_rects = sched_tracer.nr_rectangles() + 1
self.height_virtual = RootFrame.Y_OFFSET + \
(self.nr_rects * (RootFrame.RECT_HEIGHT + RootFrame.RECT_SPACE))
# whole window panel
self.panel = wx.Panel(self, size=(self.screen_width, self.screen_height))
# scrollable container
# Create SplitterWindow
self.splitter = wx.SplitterWindow(self.panel, style=wx.SP_3D)
# scrollable container (Top)
self.scroll = wx.ScrolledWindow(self.splitter)
self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale,
int(self.width_virtual // self.scroll_scale),
int(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 - 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)
self.scroll.Bind(wx.EVT_KEY_DOWN, self.on_key_press)
self.scroll.Bind(wx.EVT_LEFT_DOWN, self.on_mouse_down)
self.scroll_panel.SetSize(int(self.width_virtual), int(self.height_virtual))
# Create a separate panel for text (Bottom)
self.text_panel = wx.Panel(self.splitter)
self.text_sizer = wx.BoxSizer(wx.VERTICAL)
self.txt = wx.TextCtrl(self.text_panel, -1, "Click a bar to see details",
style=wx.TE_MULTILINE)
self.text_sizer.Add(self.txt, 1, wx.EXPAND | wx.ALL, 5)
self.text_panel.SetSizer(self.text_sizer)
# Split the window
self.splitter.SplitHorizontally(self.scroll, self.text_panel, (self.screen_height * 3) // 4)
# Main sizer to layout splitter
self.main_sizer = wx.BoxSizer(wx.VERTICAL)
self.main_sizer.Add(self.splitter, 1, wx.EXPAND)
self.panel.SetSizer(self.main_sizer)
self.scroll.Fit()
self.Fit()
self.Show(True)
def us_to_px(self, val):
"""Convert microseconds to pixels."""
return val / (10 ** 3) * self.zoom
def px_to_us(self, val):
"""Convert pixels to microseconds."""
return (val / self.zoom) * (10 ** 3)
def scroll_start(self):
"""Get scroll start position in pixels."""
(x, y) = self.scroll.GetViewStart()
return (x * self.scroll_scale, y * self.scroll_scale)
def scroll_start_us(self):
"""Get scroll start position in microseconds."""
(x, _) = self.scroll_start()
return self.px_to_us(x)
def paint_rectangle_zone(self, nr, color, top_color, start, end):
"""Draw a rectangle zone for a CPU."""
offset_px = self.us_to_px(start - self.ts_start)
width_px = self.us_to_px(end - start)
offset_py = RootFrame.Y_OFFSET + (nr * (RootFrame.RECT_HEIGHT + RootFrame.RECT_SPACE))
width_py = RootFrame.RECT_HEIGHT
dc = self.dc
if top_color is not None:
(r, g, b) = top_color
top_color = wx.Colour(r, g, b)
brush = wx.Brush(top_color, wx.SOLID)
dc.SetBrush(brush)
dc.DrawRectangle(int(offset_px), int(offset_py),
int(width_px), RootFrame.EVENT_MARKING_WIDTH)
width_py -= RootFrame.EVENT_MARKING_WIDTH
offset_py += RootFrame.EVENT_MARKING_WIDTH
(r, g, b) = color
color = wx.Colour(r, g, b)
brush = wx.Brush(color, wx.SOLID)
dc.SetBrush(brush)
dc.DrawRectangle(int(offset_px), int(offset_py), int(width_px), int(width_py))
def update_rectangles(self, start, end):
"""Update rectangles in the given time window."""
start += self.ts_start
end += self.ts_start
self.sched_tracer.fill_zone(start, end)
def on_paint(self, event):
"""Handle paint event."""
window = event.GetEventObject()
dc = wx.PaintDC(window)
# Clear background to avoid ghosting
dc.SetBackground(wx.Brush(window.GetBackgroundColour()))
dc.Clear()
self.dc = dc
try:
width = min(self.width_virtual, self.screen_width)
(x, _) = self.scroll_start()
start = self.px_to_us(x)
end = self.px_to_us(x + width)
self.update_rectangles(start, end)
# Draw CPU labels at the left edge of the visible area
(x_scroll, _) = self.scroll_start()
for nr in range(self.nr_rects):
offset_py = RootFrame.Y_OFFSET + (nr * (RootFrame.RECT_HEIGHT + RootFrame.RECT_SPACE))
dc.DrawText(f"CPU {nr}", x_scroll + 10, offset_py + 10)
finally:
self.dc = None
def rect_from_ypixel(self, y):
y -= RootFrame.Y_OFFSET
rect = y // (RootFrame.RECT_HEIGHT + RootFrame.RECT_SPACE)
height = y % (RootFrame.RECT_HEIGHT + RootFrame.RECT_SPACE)
if rect < 0 or rect > self.nr_rects - 1 or height > RootFrame.RECT_HEIGHT:
return -1
return rect
def update_summary(self, txt):
self.txt.SetValue(txt)
self.text_panel.Layout()
self.splitter.Layout()
self.text_panel.Refresh()
def on_mouse_down(self, event):
pos = event.GetPosition()
x, y = pos.x, pos.y
rect = self.rect_from_ypixel(y)
if rect == -1:
return
t = self.px_to_us(x) + self.ts_start
self.sched_tracer.mouse_down(rect, t)
def update_width_virtual(self):
self.width_virtual = self.us_to_px(self.ts_end - self.ts_start)
def __zoom(self, x):
self.update_width_virtual()
(xpos, ypos) = self.scroll.GetViewStart()
xpos = int(self.us_to_px(x) // self.scroll_scale)
self.scroll_panel.SetSize((int(self.width_virtual), int(self.height_virtual)))
self.scroll.SetScrollbars(self.scroll_scale, self.scroll_scale,
int(self.width_virtual // self.scroll_scale),
int(self.height_virtual // self.scroll_scale),
xpos, ypos)
self.Refresh()
def zoom_in(self):
x = self.scroll_start_us()
self.zoom *= 2
self.__zoom(x)
def zoom_out(self):
x = self.scroll_start_us()
self.zoom /= 2
self.__zoom(x)
def on_key_press(self, event):
key = event.GetRawKeyCode()
if key == ord("+"):
self.zoom_in()
return
if key == ord("-"):
self.zoom_out()
return
key = event.GetKeyCode()
(x, y) = self.scroll.GetViewStart()
if key == wx.WXK_RIGHT:
self.scroll.Scroll(x + 1, y)
elif key == wx.WXK_LEFT:
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)
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