Mercurial > hg
view contrib/catapipe.py @ 39318:c03c5f528e9b
perf: use storage API for resolving manifest node
lookup() isn't part of the storage API. And this code shouldn't
be accessing manifestlog._revlog directly for the modern code base.
So let's port it to the modern API.
Note that the previous code was busted for cases where we needed
to call lookup() because lookup() isn't exposed by manifestrevlog
any more.
This change is strictly BC breaking because we no longer support
resolving partial nodes. But it is a perf* command and I don't
think we should flag the change as such.
Differential Revision: https://phab.mercurial-scm.org/D4390
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 15 Aug 2018 19:45:39 +0000 |
parents | 9a81f126f9fa |
children | e9706686451b |
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#!/usr/bin/env python3 # # Copyright 2018 Google LLC. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """Tool read primitive events from a pipe to produce a catapult trace. For now the event stream supports START $SESSIONID ... and END $SESSIONID ... events. Everything after the SESSIONID (which must not contain spaces) is used as a label for the event. Events are timestamped as of when they arrive in this process and are then used to produce catapult traces that can be loaded in Chrome's about:tracing utility. It's important that the event stream *into* this process stay simple, because we have to emit it from the shell scripts produced by run-tests.py. Typically you'll want to place the path to the named pipe in the HGCATAPULTSERVERPIPE environment variable, which both run-tests and hg understand. """ from __future__ import absolute_import, print_function import argparse import datetime import json import os _TYPEMAP = { 'START': 'B', 'END': 'E', } _threadmap = {} def main(): parser = argparse.ArgumentParser() parser.add_argument('pipe', type=str, nargs=1, help='Path of named pipe to create and listen on.') parser.add_argument('output', default='trace.json', type=str, nargs='?', help='Path of named pipe to create and listen on.') parser.add_argument('--debug', default=False, action='store_true', help='Print useful debug messages') args = parser.parse_args() fn = args.pipe[0] os.mkfifo(fn) try: with open(fn) as f, open(args.output, 'w') as out: out.write('[\n') start = datetime.datetime.now() while True: ev = f.readline().strip() if not ev: continue now = datetime.datetime.now() if args.debug: print(ev) verb, session, label = ev.split(' ', 2) if session not in _threadmap: _threadmap[session] = len(_threadmap) pid = _threadmap[session] ts_micros = (now - start).total_seconds() * 1000000 out.write(json.dumps( { "name": label, "cat": "misc", "ph": _TYPEMAP[verb], "ts": ts_micros, "pid": pid, "tid": 1, "args": {} })) out.write(',\n') finally: os.unlink(fn) if __name__ == '__main__': main()