Mercurial > hg
view contrib/catapipe.py @ 46472:98e39f04d60e
upgrade: implement partial upgrade for upgrading persistent-nodemap
Upgrading repositories to use persistent nodemap should be fast and easy as it
requires only two things:
1) Updating the requirements
2) Writing a persistent-nodemap on disk
For both of the steps above, we don't need to edit existing revlogs.
This patch makes upgrade only do the above mentioned two steps if we are
only upgarding to use persistent-nodemap feature.
Since `nodemap.persist_nodemap()` assumes that there exists a nodemap file for
the given revlog if we are trying to call it, this patch adds `force` argument
to create a file if does not exist which is true in our upgrade case.
The test changes demonstrate that we no longer write nodemap files for manifest
after upgrade which I think is desirable.
Differential Revision: https://phab.mercurial-scm.org/D9936
author | Pulkit Goyal <7895pulkit@gmail.com> |
---|---|
date | Mon, 01 Feb 2021 00:02:00 +0530 |
parents | 2372284d9457 |
children | 6000f5b25c9b |
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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. Usage: Terminal 1: $ catapipe.py /tmp/mypipe /tmp/trace.json Terminal 2: $ HGCATAPULTSERVERPIPE=/tmp/mypipe hg root <ctrl-c catapipe.py in Terminal 1> $ catapult/tracing/bin/trace2html /tmp/trace.json # produce /tmp/trace.html <open trace.html in your browser of choice; the WASD keys are very useful> (catapult is located at https://github.com/catapult-project/catapult) 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. To trace *only* run-tests, use HGTESTCATAPULTSERVERPIPE instead. """ from __future__ import absolute_import, print_function import argparse import json import os import timeit _TYPEMAP = { 'START': 'B', 'END': 'E', 'COUNTER': 'C', } _threadmap = {} # Timeit already contains the whole logic about which timer to use based on # Python version and OS timer = timeit.default_timer 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 json file to create where the traces ' 'will be stored.', ) 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 = timer() while True: ev = f.readline().strip() if not ev: continue now = timer() if args.debug: print(ev) verb, session, label = ev.split(' ', 2) if session not in _threadmap: _threadmap[session] = len(_threadmap) if verb == 'COUNTER': amount, label = label.split(' ', 1) payload_args = {'value': int(amount)} else: payload_args = {} pid = _threadmap[session] ts_micros = (now - start) * 1000000 out.write( json.dumps( { "name": label, "cat": "misc", "ph": _TYPEMAP[verb], "ts": ts_micros, "pid": pid, "tid": 1, "args": payload_args, } ) ) out.write(',\n') finally: os.unlink(fn) if __name__ == '__main__': main()