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