> On Wed, Mar 18, 2015 at 06:30:17PM +0000, Gray, Mark D wrote:
> > In udpif_revalidator(), the leader thread seems to adjust the datapath
> > flow_limit in response to duration (which is the time taken to
> > revalidate). It does this with some heuristic calculations that I have
> > reproduced below. Not sure exactly why it is doing this or how the
> > heuristics work as I would have assumed the flow_limit would be
> independent of revalidation time. Can anyone shed some light on that for
> me?
> >
> > if (duration > 2000) {
> > flow_limit /= duration / 1000;
> > } else if (duration > 1300) {
> > flow_limit = flow_limit * 3 / 4;
> > } else if (duration < 1000 && n_flows > 2000
> > && flow_limit < n_flows * 1000 / duration) {
> > flow_limit += 1000;
> > }
>
> The number of flows is limited so that OVS can be confident that it can
> revalidate every flow within a bounded amount of time (I think the goal is 1
> second).
Thanks Ben.
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