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Fix process startup

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escape the % that got added in 92168cb so that the process starts up ok.
This commit is contained in:
Richard van der Hoff 2017-08-16 14:57:35 +01:00
parent 92168cbbc5
commit d2352347cf
1 changed files with 13 additions and 10 deletions
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23
synapse/config/server.py
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@ -1,5 +1,6 @@
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2017 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@ -148,22 +149,24 @@ class ServerConfig(Config):
# When running as a daemon, the file to store the pid in
pid_file: %(pid_file)s
# CPU affinity mask. Setting this restricts the CPUs on which the process
# will be scheduled. It is represented as a bitmask, with the lowest order
# bit corresponding to the first logical CPU and the highest order bit
# corresponding to the last logical CPU. Not all CPUs may exist on a
# given system but a mask may specify more CPUs than are present.
# CPU affinity mask. Setting this restricts the CPUs on which the
# process will be scheduled. It is represented as a bitmask, with the
# lowest order bit corresponding to the first logical CPU and the
# highest order bit corresponding to the last logical CPU. Not all CPUs
# may exist on a given system but a mask may specify more CPUs than are
# present.
#
# For example:
# 0x00000001 is processor #0,
# 0x00000003 is processors #0 and #1,
# 0xFFFFFFFF is all processors (#0 through #31).
#
# This is desirable for Synapse processes (especially workers), which are
# inherently single-threaded due to the GIL and can suffer a 30-40% slowdown
# due to cache blow-out and thread context switching if the scheduler happens
# to schedule the underlying threads across different cores.
# See https://www.mirantis.com/blog/improve-performance-python-programs-restricting-single-cpu/
# Pinning a Python process to a single CPU is desirable, because Python
# is inherently single-threaded due to the GIL, and can suffer a
# 30-40%% slowdown due to cache blow-out and thread context switching
# if the scheduler happens to schedule the underlying threads across
# different cores. See
# https://www.mirantis.com/blog/improve-performance-python-programs-restricting-single-cpu/.
#
# cpu_affinity: 0xFFFFFFFF