[ovs-dev] Tables entries in datapath

Justin Pettit jpettit at nicira.com
Mon Mar 24 21:55:49 UTC 2014



Junguk Cho wrote:
> Starting in OVS 2.2, there will be a configuration parameter to set the
> default value.  However, this knob is not really intended to be used by
> users and will probably get removed when we get more experience choosing
> a good value. *Why the concern? * This should really be an
> implementation detail if the system is working properly.
>
> => I want to test performance there are many flows in datapath.
> Does OVS 2.0 have 1.5 secs for timeout of flow entries in datapath?

In OVS 2.0, it was five seconds.

> Yes.  Also flow set up rate can impact how flows are cached.
> => Does "how flows are cached" mean insert datapath or is there another
> cache in OVS?

Yes, inserted into the datapath.  Take a look at the subfacet_max_idle() 
function in ofproto-dpif.c to see how timeouts work.

--Justin




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