[Openstack-operators] OpenvSwitch Latency issues

Darragh O'Reilly dara2002-openstack at yahoo.com
Wed Oct 16 08:47:21 UTC 2013


Jacob,

what operating and kernel are you using?
what ovs datapath (dpkg -l openv\*) ?
what version of openstack?

Maybe it is an issue getting in and/or out of the router namespace. Try running tcpdump on the qr-xxxxxx-xx (from namespace) and the physical interface in br-ex (from root namespace), and do a ping from namespace to outside. Then compare the timestamps on the two tcpdumps. Then try a ping from outside to in.


Jame Page reported a router performance issue recently, and setting ovs_use_veth=true somehow fixed it.

http://lists.openstack.org/pipermail/openstack/2013-October/001811.html


Re, Darragh.




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