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10d8b701a1
Make it possible to set the CPU affinity in the config file, so that we don't need to remember to do it manually every time.
100 lines
3.1 KiB
Python
100 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import gc
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import logging
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import affinity
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from daemonize import Daemonize
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from synapse.util import PreserveLoggingContext
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from synapse.util.rlimit import change_resource_limit
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from twisted.internet import reactor
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def start_worker_reactor(appname, config):
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""" Run the reactor in the main process
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Daemonizes if necessary, and then configures some resources, before starting
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the reactor. Pulls configuration from the 'worker' settings in 'config'.
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Args:
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appname (str): application name which will be sent to syslog
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config (synapse.config.Config): config object
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"""
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logger = logging.getLogger(config.worker_app)
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start_reactor(
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appname,
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config.soft_file_limit,
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config.gc_thresholds,
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config.worker_pid_file,
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config.worker_daemonize,
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config.worker_cpu_affinity,
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logger,
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)
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def start_reactor(
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appname,
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soft_file_limit,
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gc_thresholds,
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pid_file,
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daemonize,
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cpu_affinity,
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logger,
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):
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""" Run the reactor in the main process
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Daemonizes if necessary, and then configures some resources, before starting
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the reactor
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Args:
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appname (str): application name which will be sent to syslog
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soft_file_limit (int):
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gc_thresholds:
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pid_file (str): name of pid file to write to if daemonize is True
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daemonize (bool): true to run the reactor in a background process
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cpu_affinity (int|None): cpu affinity mask
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logger (logging.Logger): logger instance to pass to Daemonize
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"""
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def run():
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# make sure that we run the reactor with the sentinel log context,
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# otherwise other PreserveLoggingContext instances will get confused
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# and complain when they see the logcontext arbitrarily swapping
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# between the sentinel and `run` logcontexts.
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with PreserveLoggingContext():
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logger.info("Running")
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if cpu_affinity is not None:
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logger.info("Setting CPU affinity to %s" % cpu_affinity)
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affinity.set_process_affinity_mask(0, cpu_affinity)
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change_resource_limit(soft_file_limit)
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if gc_thresholds:
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gc.set_threshold(*gc_thresholds)
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reactor.run()
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if daemonize:
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daemon = Daemonize(
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app=appname,
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pid=pid_file,
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action=run,
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auto_close_fds=False,
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verbose=True,
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logger=logger,
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)
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daemon.start()
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else:
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run()
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