[Cake] cake flenter results round 3

Dave Taht dave.taht at gmail.com
Sat Dec 2 13:34:06 EST 2017

On Sat, Dec 2, 2017 at 9:59 AM, Dave Taht <dave.taht at gmail.com> wrote:
> On Sat, Dec 2, 2017 at 9:47 AM, George Amanakis <gamanakis at gmail.com> wrote:
>> Another run using the CMTS topology.
>> ISP limited at 200/10mbit.
>> Reference: pfifo limit 1000.
>> Cake or HTB/{codel,pie,fq,sfq} limited at 180/9mbit.
> That's a little discouraging. That's sch_fq, not fq_codel? (please add fq_codel)

Ah, OK, I  get it. (please do add fq_codel. cake (all modes) with ack
filtering. A 20ms result would be good too.)

The ginormous default buffer size for sch_fq leads to seconds of tcp
RTT, but the latency number for the measurement flows is low because
it's fq. sfq amazingly is holding it's own (which it didn't used to),
with it's mere 128 buffers at this RTT, it girates around 200+ms rtt
for tcp.. I imagine that tcp pacing is helping it a lot here, even at
these long rtts...

And the surprising winner at the 98th percentile is... cake flowblind.
There are major differences in the aqm algorithm between codel and

(all reasonable news.. along with my perpetual joy at "it doesn't crash")

There are a few other puzzling things in this data-set.

>> RTT 100ms.
>> rrul_be_nflows, 32 download, 8 upload streams.
>> George
> --
> Dave Täht
> CEO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-669-226-2619


Dave Täht
CEO, TekLibre, LLC
Tel: 1-669-226-2619
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