[Cake] inbound cake or fq_codel shaping fails on cable on netflix reno

Sebastian Moeller moeller0 at gmx.de
Tue Jul 24 13:58:33 EDT 2018

Hi Kevin, 

Maybe don't use the ptm keyword, but rather reduce the shaper rates to at most 98.46 percent of the sync rate...

On July 24, 2018 4:54:01 PM GMT+02:00, Kevin Darbyshire-Bryant <kevin at darbyshire-bryant.me.uk> wrote:
>> On 24 Jul 2018, at 14:51, Dave Taht <dave.taht at gmail.com> wrote:
>> Now that you can join the party, I note there IS a flent server in
>england with irtt on it.
>> flent-london.bufferbloat.net
>Ok, well if you’re desperately interested….. :-)
>Plot I did running to the london server, one shaped at 99% downstream,
>the other at 98%…. and I’ve decided to stick at 98% as a result - plot
>is a little bit hard to distinguish but I’d say there’s around 8ms avg
>less latency-ish between the two.  And an order of magnitude between
>using london v fremont :-)
>The upstream barely registers
># tc -s qdisc show dev ifb4eth0
>qdisc cake 801a: root refcnt 2 bandwidth 78400Kbit diffserv3
>dual-dsthost nat ingress split-gso rtt 100.0ms ptm overhead 26

Sent from my Android device with K-9 Mail. Please excuse my brevity.
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