[Cake] arp flow dissector

[Jonathan Morton]

> On 3 Sep, 2018, at 3:29 pm, David Lang <david at lang.hm> wrote:
> 
> how much ARP traffic would there have to be before the benefits of this outweigh the overhead of tracking it?

If there's very little ARP traffic (as normal), then the overhead of recognising it is basically nil.

The benefits become apparent as soon as the volume of ARP traffic, in aggregate, becomes great enough for its queue to be marked "saturating" instead of "sparse".  This could reasonably occur if the other traffic consists of a lot of distinct flows.

 - Jonathan Morton