Commit 7e186f3e authored by Ell's avatar Ell

tools: add performance-log-deduce.py

... which statistically deduces the correct thread states based on
backtrace address frequency, fixing local inaccuracies.
parent 87999d17
......@@ -99,5 +99,6 @@ EXTRA_DIST = \
defcheck.py \
gimp-mkenums \
gimppath2svg.py \
performance-log-deduce.py \
performance-log-expand.py \
performance-log-resolve.py
#!/usr/bin/env python3
"""
performance-log-deduce.py -- Deduce GIMP performance log thread state
Copyright (C) 2018 Ell
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Usage: performance-log-deduce.py < infile > outfile
"""
DEDUCE_MIN_N_OCCURRENCES = 10
DEDUCE_MIN_PERCENTAGE = 0.75
from xml.etree import ElementTree
import sys
empty_element = ElementTree.Element ("")
# Read performance log from STDIN
log = ElementTree.fromstring (sys.stdin.buffer.read ())
# Construct state histogram
address_states = {}
for sample in (log.find ("samples") or empty_element).iterfind ("sample"):
threads = (sample.find ("backtrace") or empty_element).iterfind ("thread")
for thread in threads:
running = int (thread.get ("running"))
frame = thread.find ("frame")
if frame is not None:
address = frame.get ("address")
states = address_states.setdefault (address, [0, 0])
states[running] += 1
# Find maximal states
for address, states in list (address_states.items ()):
n = sum (states)
if n >= DEDUCE_MIN_N_OCCURRENCES:
state = 0
m = states[0]
for i in range (1, len (states)):
if states[i] > m:
state = i
m = states[i]
percentage = m / n
if percentage >= DEDUCE_MIN_PERCENTAGE:
address_states[address] = state
else:
del address_states[address]
else:
del address_states[address]
# Replace thread states
for sample in (log.find ("samples") or empty_element).iterfind ("sample"):
threads = (sample.find ("backtrace") or empty_element).iterfind ("thread")
for thread in threads:
frame = thread.find ("frame")
if frame is not None:
address = frame.get ("address")
running = address_states.get (address, None)
if running is not None:
thread.set ("running", str (running))
# Write performance log to STDOUT
sys.stdout.buffer.write (ElementTree.tostring (log))
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment