[Cake] apu2 sqm/htb issue + a minor win for speeding up fq_codel itself

[Dave Taht]

making htb's cburst and burst parameters 64k gets the APU2  up to
where it can shape 900mbits. 3 ksoftirq handlers start getting cpu
time, and we end up 54% idle to achiefe that.

I should really go around running my own old code. I was deeply
involved in sqm when we still had to run at sub 200mbit levels. since
then it's been
mostly tbf (burst 64k) + fq_codel or cake, and me ignoring various bug
reports about it not scaling well enough at higher rates.
On Tue, Sep 4, 2018 at 12:59 PM Dave Taht <dave.taht at gmail.com> wrote:
>
> less than scientifically (via monitoring top) - on the apu2
>
> 100Mbit sqm (htb + fq_codel)
>
> fq_codel_mainline | fq_codel_fast
> idle 78.8                | 83.5 |
> si    20                   | 16.1 |
>
> Yea! But:
>
> 900Mbit sqm (htb + fq_codel)
>
> fq_codel_mainline | fq_codel_fast
> idle 74.4                | 74.4 |
> si    25                   | 25.1 |
>
> Here: completely bottlenecked on ksoftirqd - and I only get 340Mbits
> out of the 900mbit setting. quantum 96k and burst of 15000. Haven't
> fiddled with higher values yet...
>
>
>
> --
>
> Dave Täht
> CEO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-669-226-2619



-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619