75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
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#!/usr/bin/python
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import os
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import math
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stream = os.popen('perf script -F time,event')
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is_in_update_fb = False
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class StateTracker:
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def __init__(self, name, src, enter, leave):
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self.is_active = False
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self.name = name
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self.src = src
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self.enter = enter
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self.leave = leave
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self.n = 0
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self.dt_sum = 0.0
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self.dt_square_sum = 0.0
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self.dt_max = 0.0
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self.dt_min = math.inf
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def add_dt(self, dt):
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self.n += 1
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self.dt_sum += dt
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self.dt_square_sum += dt ** 2
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self.dt_max = max(self.dt_max, dt)
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self.dt_min = min(self.dt_min, dt)
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def apply(self, src, event, t):
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if self.is_active:
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if (src, event) == (self.src, self.leave):
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self.is_active = False
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self.add_dt(t - self.t0)
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else:
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if (src, event) == (self.src, self.enter):
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self.is_active = True
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self.t0 = t
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def avg(self):
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return self.dt_sum / self.n
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def var(self):
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return self.dt_square_sum / self.n - self.avg() ** 2
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def stddev(self):
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return math.sqrt(self.var())
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def report(self):
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if self.n == 0:
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return
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print('{}:'.format(self.name))
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print('\tMin, max: {:.1f} ms, {:.1f} ms'.format(self.dt_min * 1e3, self.dt_max * 1e3))
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print('\tAverage, std.dev.: {:.1f} ms, {:.1f} ms'.format(self.avg() * 1e3, self.stddev() * 1e3))
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trackers = [
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StateTracker('Framebuffer update', 'sdt_neatvnc', 'update_fb_start', 'update_fb_done'),
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StateTracker('Screencopy', 'sdt_wayvnc', 'screencopy_start', 'screencopy_ready'),
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StateTracker('Render', 'sdt_wayvnc', 'render_framebuffer_start', 'render_framebuffer_end'),
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StateTracker('Copy damage map', 'sdt_wayvnc', 'render_read_damage_start', 'render_read_damage_end'),
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StateTracker('Copy frame pixels', 'sdt_wayvnc', 'render_read_frame_start', 'render_read_frame_end'),
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]
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for line in stream:
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[t, src, event, _] = line.replace(' ', '').split(':')
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t = float(t)
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for tracker in trackers:
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tracker.apply(src, event, t)
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for tracker in trackers:
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tracker.report()
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print()
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