[Cake] lan keyword affects host fairness

Pete Heist peteheist at gmail.com
Fri Nov 24 15:24:30 EST 2017

> On Nov 24, 2017, at 8:48 PM, Jonathan Morton <chromatix99 at gmail.com> wrote:
> Can I just point out that the four hardware queues will themselves be interfering with the backpressure on short timescales when Cake is in unlimited mode, and can easily explain the poorer host-fairness performance
Ok, just for clarity I have a single cake instance at the root, not four of them under mq.
> Conversely, the real performance is seen when the internal shaper is used.  What happens if you say "bandwidth 1Gbit ethernet"?

Results posted for that with and without ‘lan'. I suppose I’m starting then to lose control of the queue? It's around 1.85:1.

https://docs.google.com/spreadsheets/d/1SMXWw2fLfmBRU622urfdvA_Ujsuf_KQ4P3uyOH1skOM/edit#gid=2072687073 <https://docs.google.com/spreadsheets/d/1SMXWw2fLfmBRU622urfdvA_Ujsuf_KQ4P3uyOH1skOM/edit#gid=2072687073>

Also on the “1Gbit ethernet lan” tab I thought to add the output from “tc -s qdisc” after the test from the server side, for info.

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