Mercurial > hg
view mercurial/httpconnection.py @ 30451:94ca0e13d1fc
perf: add command for measuring revlog chunk operations
Upcoming commits will teach revlogs to leverage the new compression
engine API so that new compression formats can more easily be
leveraged in revlogs. We want to be sure this refactoring doesn't
regress performance. So this commit introduces "perfrevchunks" to
explicitly test performance of reading, decompressing, and
recompressing revlog chunks.
Here is output when run on the mozilla-unified repo:
$ hg perfrevlogchunks -c
! read
! wall 0.346603 comb 0.350000 user 0.340000 sys 0.010000 (best of 28)
! read w/ reused fd
! wall 0.337707 comb 0.340000 user 0.320000 sys 0.020000 (best of 30)
! read batch
! wall 0.013206 comb 0.020000 user 0.000000 sys 0.020000 (best of 221)
! read batch w/ reused fd
! wall 0.013259 comb 0.030000 user 0.010000 sys 0.020000 (best of 222)
! chunk
! wall 1.909939 comb 1.910000 user 1.900000 sys 0.010000 (best of 6)
! chunk batch
! wall 1.750677 comb 1.760000 user 1.740000 sys 0.020000 (best of 6)
! compress
! wall 5.668004 comb 5.670000 user 5.670000 sys 0.000000 (best of 3)
$ hg perfrevlogchunks -m
! read
! wall 0.365834 comb 0.370000 user 0.350000 sys 0.020000 (best of 26)
! read w/ reused fd
! wall 0.350160 comb 0.350000 user 0.320000 sys 0.030000 (best of 28)
! read batch
! wall 0.024777 comb 0.020000 user 0.000000 sys 0.020000 (best of 119)
! read batch w/ reused fd
! wall 0.024895 comb 0.030000 user 0.000000 sys 0.030000 (best of 118)
! chunk
! wall 2.514061 comb 2.520000 user 2.480000 sys 0.040000 (best of 4)
! chunk batch
! wall 2.380788 comb 2.380000 user 2.360000 sys 0.020000 (best of 5)
! compress
! wall 9.815297 comb 9.820000 user 9.820000 sys 0.000000 (best of 3)
We already see some interesting data, such as how much slower
non-batched chunk reading is and that zlib compression appears to be
>2x slower than decompression.
I didn't have the data when I wrote this commit message, but I ran this
on Mozilla's NFS-based Mercurial server and the time for reading with a
reused file descriptor was faster. So I think it is worth testing both
with and without file descriptor reuse so we can make informed
decisions about recycling file descriptors.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 17 Nov 2016 20:17:51 -0800 |
parents | 3dcaf1c4e90d |
children | 90e69badb125 |
line wrap: on
line source
# httpconnection.py - urllib2 handler for new http support # # Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> # Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> # Copyright 2011 Google, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import logging import os import socket from .i18n import _ from . import ( httpclient, sslutil, util, ) urlerr = util.urlerr urlreq = util.urlreq # moved here from url.py to avoid a cycle class httpsendfile(object): """This is a wrapper around the objects returned by python's "open". Its purpose is to send file-like objects via HTTP. It do however not define a __len__ attribute because the length might be more than Py_ssize_t can handle. """ def __init__(self, ui, *args, **kwargs): self.ui = ui self._data = open(*args, **kwargs) self.seek = self._data.seek self.close = self._data.close self.write = self._data.write self.length = os.fstat(self._data.fileno()).st_size self._pos = 0 self._total = self.length // 1024 * 2 def read(self, *args, **kwargs): try: ret = self._data.read(*args, **kwargs) except EOFError: self.ui.progress(_('sending'), None) self._pos += len(ret) # We pass double the max for total because we currently have # to send the bundle twice in the case of a server that # requires authentication. Since we can't know until we try # once whether authentication will be required, just lie to # the user and maybe the push succeeds suddenly at 50%. self.ui.progress(_('sending'), self._pos // 1024, unit=_('kb'), total=self._total) return ret def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.close() # moved here from url.py to avoid a cycle def readauthforuri(ui, uri, user): # Read configuration config = dict() for key, val in ui.configitems('auth'): if '.' not in key: ui.warn(_("ignoring invalid [auth] key '%s'\n") % key) continue group, setting = key.rsplit('.', 1) gdict = config.setdefault(group, dict()) if setting in ('username', 'cert', 'key'): val = util.expandpath(val) gdict[setting] = val # Find the best match scheme, hostpath = uri.split('://', 1) bestuser = None bestlen = 0 bestauth = None for group, auth in config.iteritems(): if user and user != auth.get('username', user): # If a username was set in the URI, the entry username # must either match it or be unset continue prefix = auth.get('prefix') if not prefix: continue p = prefix.split('://', 1) if len(p) > 1: schemes, prefix = [p[0]], p[1] else: schemes = (auth.get('schemes') or 'https').split() if (prefix == '*' or hostpath.startswith(prefix)) and \ (len(prefix) > bestlen or (len(prefix) == bestlen and \ not bestuser and 'username' in auth)) \ and scheme in schemes: bestlen = len(prefix) bestauth = group, auth bestuser = auth.get('username') if user and not bestuser: auth['username'] = user return bestauth # Mercurial (at least until we can remove the old codepath) requires # that the http response object be sufficiently file-like, so we # provide a close() method here. class HTTPResponse(httpclient.HTTPResponse): def close(self): pass class HTTPConnection(httpclient.HTTPConnection): response_class = HTTPResponse def request(self, method, uri, body=None, headers=None): if headers is None: headers = {} if isinstance(body, httpsendfile): body.seek(0) httpclient.HTTPConnection.request(self, method, uri, body=body, headers=headers) _configuredlogging = False LOGFMT = '%(levelname)s:%(name)s:%(lineno)d:%(message)s' # Subclass BOTH of these because otherwise urllib2 "helpfully" # reinserts them since it notices we don't include any subclasses of # them. class http2handler(urlreq.httphandler, urlreq.httpshandler): def __init__(self, ui, pwmgr): global _configuredlogging urlreq.abstracthttphandler.__init__(self) self.ui = ui self.pwmgr = pwmgr self._connections = {} # developer config: ui.http2debuglevel loglevel = ui.config('ui', 'http2debuglevel', default=None) if loglevel and not _configuredlogging: _configuredlogging = True logger = logging.getLogger('mercurial.httpclient') logger.setLevel(getattr(logging, loglevel.upper())) handler = logging.StreamHandler() handler.setFormatter(logging.Formatter(LOGFMT)) logger.addHandler(handler) def close_all(self): """Close and remove all connection objects being kept for reuse.""" for openconns in self._connections.values(): for conn in openconns: conn.close() self._connections = {} # shamelessly borrowed from urllib2.AbstractHTTPHandler def do_open(self, http_class, req, use_ssl): """Return an addinfourl object for the request, using http_class. http_class must implement the HTTPConnection API from httplib. The addinfourl return value is a file-like object. It also has methods and attributes including: - info(): return a mimetools.Message object for the headers - geturl(): return the original request URL - code: HTTP status code """ # If using a proxy, the host returned by get_host() is # actually the proxy. On Python 2.6.1, the real destination # hostname is encoded in the URI in the urllib2 request # object. On Python 2.6.5, it's stored in the _tunnel_host # attribute which has no accessor. tunhost = getattr(req, '_tunnel_host', None) host = req.get_host() if tunhost: proxyhost = host host = tunhost elif req.has_proxy(): proxyhost = req.get_host() host = req.get_selector().split('://', 1)[1].split('/', 1)[0] else: proxyhost = None if proxyhost: if ':' in proxyhost: # Note: this means we'll explode if we try and use an # IPv6 http proxy. This isn't a regression, so we # won't worry about it for now. proxyhost, proxyport = proxyhost.rsplit(':', 1) else: proxyport = 3128 # squid default proxy = (proxyhost, proxyport) else: proxy = None if not host: raise urlerr.urlerror('no host given') connkey = use_ssl, host, proxy allconns = self._connections.get(connkey, []) conns = [c for c in allconns if not c.busy()] if conns: h = conns[0] else: if allconns: self.ui.debug('all connections for %s busy, making a new ' 'one\n' % host) timeout = None if req.timeout is not socket._GLOBAL_DEFAULT_TIMEOUT: timeout = req.timeout h = http_class(host, timeout=timeout, proxy_hostport=proxy) self._connections.setdefault(connkey, []).append(h) headers = dict(req.headers) headers.update(req.unredirected_hdrs) headers = dict( (name.title(), val) for name, val in headers.items()) try: path = req.get_selector() if '://' in path: path = path.split('://', 1)[1].split('/', 1)[1] if path[0] != '/': path = '/' + path h.request(req.get_method(), path, req.data, headers) r = h.getresponse() except socket.error as err: # XXX what error? raise urlerr.urlerror(err) # Pick apart the HTTPResponse object to get the addinfourl # object initialized properly. r.recv = r.read resp = urlreq.addinfourl(r, r.headers, req.get_full_url()) resp.code = r.status resp.msg = r.reason return resp # httplib always uses the given host/port as the socket connect # target, and then allows full URIs in the request path, which it # then observes and treats as a signal to do proxying instead. def http_open(self, req): if req.get_full_url().startswith('https'): return self.https_open(req) def makehttpcon(*args, **kwargs): k2 = dict(kwargs) k2['use_ssl'] = False return HTTPConnection(*args, **k2) return self.do_open(makehttpcon, req, False) def https_open(self, req): # req.get_full_url() does not contain credentials and we may # need them to match the certificates. url = req.get_full_url() user, password = self.pwmgr.find_stored_password(url) res = readauthforuri(self.ui, url, user) if res: group, auth = res self.auth = auth self.ui.debug("using auth.%s.* for authentication\n" % group) else: self.auth = None return self.do_open(self._makesslconnection, req, True) def _makesslconnection(self, host, port=443, *args, **kwargs): keyfile = None certfile = None if args: # key_file keyfile = args.pop(0) if args: # cert_file certfile = args.pop(0) # if the user has specified different key/cert files in # hgrc, we prefer these if self.auth and 'key' in self.auth and 'cert' in self.auth: keyfile = self.auth['key'] certfile = self.auth['cert'] # let host port take precedence if ':' in host and '[' not in host or ']:' in host: host, port = host.rsplit(':', 1) port = int(port) if '[' in host: host = host[1:-1] kwargs['keyfile'] = keyfile kwargs['certfile'] = certfile con = HTTPConnection(host, port, use_ssl=True, ssl_wrap_socket=sslutil.wrapsocket, ssl_validator=sslutil.validatesocket, ui=self.ui, **kwargs) return con