[Cake] Cake not more CPU efficient than HTB+FQ-CoDel (anymore)?

[Sebastian Moeller]

On April 11, 2018 8:55:12 PM GMT+02:00, "Jonas Mårtensson" <martensson.jonas at gmail.com> wrote:
>On Wed, Apr 11, 2018 at 7:15 PM, Toke Høiland-Jørgensen <toke at toke.dk>
>wrote:
>
>> Jonathan Morton <chromatix99 at gmail.com> writes:
>>
>> >> On 11 Apr, 2018, at 6:24 pm, Toke Høiland-Jørgensen <toke at toke.dk>
>> wrote:
>> >>
>> >> So, um, did we cram so many features into Cake that it no longer
>uses
>> >> less CPU? Can anyone confirm these results?
>> >
>> > To be sure about this, it seems wise to configure Cake to turn off
>as
>> > many of the new features as possible. That means selecting
>"besteffort
>> > flows nonat" mode at least.
>> >
>> > I forget whether simplest.qos correctly uses the built-in shaper
>with
>> > Cake, rather than just layering it with HTB as usual. If not, then
>of
>> > course Cake will use more CPU, and we should be grateful that it's
>by
>> > a relatively small margin (maybe 15%).
>>
>> It is definitely using Cake as the shaper; in besteffort mode, but
>with
>> nat and triple-isolation enabled I think. I'll run another test
>tomorrow
>> with those disabled.
>
>
>Is there any difference between using simplest.qos and
>piece_of_cake.qos
>when Cake is used as qdisc?

Yes, IIRC simplest.qos with cake as qdisc will use HTB as shaper and cake as leaf qdisc, while piece_of_cake.qos will use cake both as shaper and leaf qdisc. The former is only useful for comparative testing, for actual usage I recommend the later.

Best Regards
        Sebastian


>
>/Jonas

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