diff --git a/synapse/config/server.py b/synapse/config/server.py
index 28b4e5f50c..c9a1715f1f 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -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.
@@ -29,6 +30,7 @@ class ServerConfig(Config):
self.user_agent_suffix = config.get("user_agent_suffix")
self.use_frozen_dicts = config.get("use_frozen_dicts", False)
self.public_baseurl = config.get("public_baseurl")
+ self.cpu_affinity = config.get("cpu_affinity")
# Whether to send federation traffic out in this process. This only
# applies to some federation traffic, and so shouldn't be used to
@@ -41,6 +43,12 @@ class ServerConfig(Config):
self.filter_timeline_limit = config.get("filter_timeline_limit", -1)
+ # Whether we should block invites sent to users on this server
+ # (other than those sent by local server admins)
+ self.block_non_admin_invites = config.get(
+ "block_non_admin_invites", False,
+ )
+
if self.public_baseurl is not None:
if self.public_baseurl[-1] != '/':
self.public_baseurl += '/'
@@ -147,6 +155,27 @@ 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.
+ #
+ # For example:
+ # 0x00000001 is processor #0,
+ # 0x00000003 is processors #0 and #1,
+ # 0xFFFFFFFF is all processors (#0 through #31).
+ #
+ # 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
+
# Whether to serve a web client from the HTTP/HTTPS root resource.
web_client: True
@@ -171,6 +200,10 @@ class ServerConfig(Config):
# and sync operations. The default value is -1, means no upper limit.
# filter_timeline_limit: 5000
+ # Whether room invites to users on this server should be blocked
+ # (except those sent by local server admins). The default is False.
+ # block_non_admin_invites: True
+
# List of ports that Synapse should listen on, their purpose and their
# configuration.
listeners:
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