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https://git.yoctoproject.org/poky
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20f032338f
Reworks the hash equivalence server to address performance issues that were encountered with the REST mechanism used previously, particularly during the heavy request load encountered during signature generation. Notable changes are: 1) The server protocol is no longer HTTP based. Instead, it uses a simpler JSON over a streaming protocol link. This protocol has much lower overhead than HTTP since it eliminates the HTTP headers. 2) The hash equivalence server can either bind to a TCP port, or a Unix domain socket. Unix domain sockets are more efficient for local communication, and so are preferred if the user enables hash equivalence only for the local build. The arguments to the 'bitbake-hashserve' command have been updated accordingly. 3) The value to which BB_HASHSERVE should be set to enable a local hash equivalence server is changed to "auto" instead of "localhost:0". The latter didn't make sense when the local server was using a Unix domain socket. 4) Clients are expected to keep a persistent connection to the server instead of creating a new connection each time a request is made for optimal performance. 5) Most of the client logic has been moved to the hashserve module in bitbake. This makes it easier to share the client code. 6) A new bitbake command has been added called 'bitbake-hashclient'. This command can be used to query a hash equivalence server, including fetching the statistics and running a performance stress test. 7) The table indexes in the SQLite database have been updated to optimize hash lookups. This change is backward compatible, as the database will delete the old indexes first if they exist. 8) The server has been reworked to use python async to maximize performance with persistently connected clients. This requires Python 3.5 or later. (Bitbake rev: 2124eec3a5830afe8e07ffb6f2a0df6a417ac973) Signed-off-by: Joshua Watt <JPEWhacker@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
94 lines
2.4 KiB
Python
94 lines
2.4 KiB
Python
# Copyright (C) 2018-2019 Garmin Ltd.
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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from contextlib import closing
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import re
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import sqlite3
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UNIX_PREFIX = "unix://"
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ADDR_TYPE_UNIX = 0
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ADDR_TYPE_TCP = 1
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def setup_database(database, sync=True):
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db = sqlite3.connect(database)
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db.row_factory = sqlite3.Row
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with closing(db.cursor()) as cursor:
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cursor.execute('''
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CREATE TABLE IF NOT EXISTS tasks_v2 (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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method TEXT NOT NULL,
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outhash TEXT NOT NULL,
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taskhash TEXT NOT NULL,
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unihash TEXT NOT NULL,
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created DATETIME,
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-- Optional fields
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owner TEXT,
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PN TEXT,
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PV TEXT,
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PR TEXT,
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task TEXT,
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outhash_siginfo TEXT,
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UNIQUE(method, outhash, taskhash)
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)
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''')
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cursor.execute('PRAGMA journal_mode = WAL')
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cursor.execute('PRAGMA synchronous = %s' % ('NORMAL' if sync else 'OFF'))
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# Drop old indexes
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cursor.execute('DROP INDEX IF EXISTS taskhash_lookup')
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cursor.execute('DROP INDEX IF EXISTS outhash_lookup')
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# Create new indexes
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cursor.execute('CREATE INDEX IF NOT EXISTS taskhash_lookup_v2 ON tasks_v2 (method, taskhash, created)')
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cursor.execute('CREATE INDEX IF NOT EXISTS outhash_lookup_v2 ON tasks_v2 (method, outhash)')
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return db
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def parse_address(addr):
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if addr.startswith(UNIX_PREFIX):
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return (ADDR_TYPE_UNIX, (addr[len(UNIX_PREFIX):],))
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else:
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m = re.match(r'\[(?P<host>[^\]]*)\]:(?P<port>\d+)$', addr)
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if m is not None:
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host = m.group('host')
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port = m.group('port')
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else:
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host, port = addr.split(':')
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return (ADDR_TYPE_TCP, (host, int(port)))
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def create_server(addr, dbname, *, sync=True):
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from . import server
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db = setup_database(dbname, sync=sync)
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s = server.Server(db)
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(typ, a) = parse_address(addr)
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if typ == ADDR_TYPE_UNIX:
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s.start_unix_server(*a)
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else:
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s.start_tcp_server(*a)
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return s
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def create_client(addr):
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from . import client
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c = client.Client()
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(typ, a) = parse_address(addr)
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if typ == ADDR_TYPE_UNIX:
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c.connect_unix(*a)
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else:
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c.connect_tcp(*a)
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return c
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