e3be3f913c
By default number of MAC addresses which ovs stores in memory
is quite low - 2048.
Any eviction of a MAC learning table entry triggers revalidation.
Such revalidation is very costly so it cause high CPU usage by
ovs-vswitchd process.
To workaround this problem, higher value of mac-table-size
option can be set for bridge. Then this revalidation will happen
less often and CPU usage will be lower.
This patch adds config option for neutron-openvswitch-agent to allow
users tune this setting in bridges managed by agent.
By default this value is set to 50000 which should be enough for most
systems.
Change-Id: If628f52d75c2b5fec87ad61e0219b3286423468c
Closes-Bug: #1775797
(cherry picked from commit 1f8378e0ac)
42 lines
1.6 KiB
Python
42 lines
1.6 KiB
Python
# Copyright 2011 VMware, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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from neutron._i18n import _
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# Default timeout for ovsdb commands
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DEFAULT_OVSDB_TIMEOUT = 10
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OPTS = [
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cfg.IntOpt('ovsdb_timeout',
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default=DEFAULT_OVSDB_TIMEOUT,
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deprecated_name='ovs_vsctl_timeout', deprecated_group='DEFAULT',
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help=_('Timeout in seconds for ovsdb commands. '
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'If the timeout expires, ovsdb commands will fail with '
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'ALARMCLOCK error.')),
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cfg.IntOpt('bridge_mac_table_size',
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default=50000,
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help=_('The maximum number of MAC addresses to learn on '
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'a bridge managed by the Neutron OVS agent. Values '
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'outside a reasonable range (10 to 1,000,000) might be '
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'overridden by Open vSwitch according to the '
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'documentation.')),
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]
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def register_ovs_agent_opts(cfg=cfg.CONF):
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cfg.register_opts(OPTS, 'OVS')
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