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c96de69e80
Requires servo/servo#37045 for deps and config. Testing: No need for tests to test tests. Fixes: servo/servo#37041 --------- Signed-off-by: zefr0x <zer0-x.7ty50@aleeas.com>
155 lines
4.3 KiB
Python
155 lines
4.3 KiB
Python
#!/usr/bin/env python3
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# Copyright 2018 The Servo Project Developers. See the COPYRIGHT
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# file at the top-level directory of this distribution.
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#
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# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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# option. This file may not be copied, modified, or distributed
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# except according to those terms.
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# Script to take raw sample output from Servo sampling profiler and
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# output a [processed profile]. Based largely on [this script] and
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# [this documentation].
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#
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# [processed profile]: https://github.com/firefox-devtools/profiler/blob/main/docs-developer/processed-profile-format.md
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# [this script]: https://github.com/firefox-devtools/profiler/blob/main/src/profile-logic/import/linux-perf.js
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# [this documentation]: https://github.com/firefox-devtools/profiler/blob/main/src/types/profile.js
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from collections import defaultdict
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import json
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import sys
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class StringTable:
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def __init__(self):
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self.table = {}
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self.idx = 0
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def get(self, s):
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assert s
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if s not in self.table:
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self.table[s] = self.idx
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self.idx += 1
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return self.table[s]
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def length(self):
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return len(list(self.table.keys()))
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def contents(self):
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return sorted(list(self.table.keys()), key=self.table.__getitem__)
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with open(sys.argv[1]) as f:
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profile = json.load(f)
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rate = profile["rate"]
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samples = profile["data"]
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startTime = profile["start"]
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frames = {}
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stacks = {}
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thread_data = defaultdict(list)
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thread_order = {}
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for sample in samples:
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if sample["name"]:
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name = sample["name"]
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else:
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name = "%s %d %d" % (sample["type"], sample["namespace"], sample["index"])
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thread_data[name].append((sample["time"], sample["frames"]))
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if name not in thread_order:
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thread_order[name] = (sample["namespace"], sample["index"])
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tid = 0
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threads = []
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for name, raw_samples in sorted(iter(thread_data.items()), key=lambda x: thread_order[x[0]]):
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string_table = StringTable()
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tid += 1
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stackMap = {}
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stacks = []
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frameMap = {}
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frames = []
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samples = []
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for sample in raw_samples:
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prefix = None
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for frame in sample[1]:
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if not frame["name"]:
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continue
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if frame["name"] not in frameMap:
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frameMap[frame["name"]] = len(frames)
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frame_index = string_table.get(frame["name"])
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frames.append([frame_index])
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frame = frameMap[frame["name"]]
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stack_key = "%d,%d" % (frame, prefix) if prefix else str(frame)
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if stack_key not in stackMap:
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stackMap[stack_key] = len(stacks)
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stacks.append([frame, prefix])
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stack = stackMap[stack_key]
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prefix = stack
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samples.append([stack, sample[0]])
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threads.append(
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{
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"tid": tid,
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"name": name,
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"markers": {
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"schema": {
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"name": 0,
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"time": 1,
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"data": 2,
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},
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"data": [],
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},
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"samples": {
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"schema": {
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"stack": 0,
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"time": 1,
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"responsiveness": 2,
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"rss": 2,
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"uss": 4,
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"frameNumber": 5,
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},
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"data": samples,
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},
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"frameTable": {
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"schema": {
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"location": 0,
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"implementation": 1,
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"optimizations": 2,
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"line": 3,
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"category": 4,
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},
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"data": frames,
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},
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"stackTable": {
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"schema": {
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"frame": 0,
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"prefix": 1,
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},
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"data": stacks,
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},
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"stringTable": string_table.contents(),
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}
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)
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output = {
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"meta": {
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"interval": rate,
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"processType": 0,
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"product": "Servo",
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"stackwalk": 1,
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"startTime": startTime,
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"version": 4,
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"presymbolicated": True,
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},
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"libs": [],
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"threads": threads,
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}
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print(json.dumps(output))
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