[Cake] Understanding the Achieved Rate Multiplication Effect in FlowQueue-based AQM Bottleneck

[Dave Taht]

It was the conquest tool they referenced that really caught my eye

https://www.youtube.com/watch?v=Q3FFzB0SUjc

"ConQuest: Fine-Grained Queue Measurement in the Data Plane"

On Fri, Dec 3, 2021 at 4:09 PM Jonathan Morton <chromatix99 at gmail.com> wrote:
>
> > On 4 Dec, 2021, at 12:27 am, Dave Taht <dave.taht at gmail.com> wrote:
> >
> > https://jonathankua.github.io/preprints/jkua-ieeelcn2021_understanding_ar_preprint-20jul2021.pdf
> >
> > I would love it if somehow the measured effects of chunklets against cake's per-host/per flow fq was examined one day.
>
> I haven't actually measured it, but based on what the above paper says, I can make some firm predictions:
>
> 1: When competing against traffic to the same local host, the performance effects they describe will be present.
>
> 2: When competing against traffic to a different local-network host, the performance effects they describe will be attenuated or even entirely absent.
>
> 3: They noted one or two cases of observable effects of hash collisions in their tests with FQ-Codel.  These will be greatly reduced in prevalence with Cake, due to the set-associative hash function which specifically addresses that phenomenon.
>
>  - Jonathan Morton



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Dave Täht CEO, TekLibre, LLC