Comment 5 for bug 1734623

On Nova Compute Nodes with many allowed-addres-pairs the openvswitch agent's "Agent rpc_loop" takes forever. And I think it never finishes, as the "added" count never decreases.

2017-11-28 09:02:15.725 53388 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-c9e21302-5c5c-4f2c-b2ba-b8041d47c1e9 - - - - -] Agent rpc_loop - iteration:91 completed. Processed ports statistics: {'regular': {'updated': 0, 'added': 30, 'removed': 0}}. Elapsed:1205.793 loop_count_and_wait /usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1771
2017-11-28 09:13:07.161 53388 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-c9e21302-5c5c-4f2c-b2ba-b8041d47c1e9 - - - - -] Agent rpc_loop - iteration:92 completed. Processed ports statistics: {'regular': {'updated': 0, 'added': 30, 'removed': 0}}. Elapsed:651.435 loop_count_and_wait /usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1771

Compared to another compute node, without allowed-addres-pairs
2017-11-28 11:01:24.938 32558 DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-8075ac82-7601-4070-9bf7-a5de18982114 - - - - -] Agent rpc_loop - iteration:638 completed. Processed ports statistics: {'regular': {'updated': 0, 'added': 0, 'removed': 0}}. Elapsed:0.010 loop_count_and_wait /usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:1771