[Bloat] Fwd: [Bug 1436945] Re: devel: consider fq_codel as the default qdisc for networking

[Dave Taht]

On Mon, Jun 4, 2018 at 6:16 AM, Jonas Mårtensson
<martensson.jonas at gmail.com> wrote:
>
>
> On Mon, Jun 4, 2018 at 1:28 PM, Bless, Roland (TM) <roland.bless at kit.edu>
> wrote:
>>
>> Hi,
>>
>> Am 24.05.2018 um 17:38 schrieb Jan Ceuleers:
>> > Took 3 years after Dave approached them, but Ubuntu is finally adopting
>> > fq_codel as the default qdisc.
>>
>> Yes, if the Linux kernel is forwarding packets it makes a lot of sense,
>> but I don't understand why it make sense for ordinary end-systems.
>> Didn't Byte Queue Limits (BQL) suffice? Just curious...
>
>
> Actually, for a long time now the codel wiki has recommended using sch_fq
> instead of fq_codel for servers.

That recommendation predates the tcp pacing change you note below.

I'm pretty convinced fq_codel is now the best all around "default"
qdisc, and we should rework our recomendation.

> It seems Ubuntu defaulting to fq_codel is a result of using systemd which
> adopted it as default almost 4 years ago. There was a request to change the
> default in systemd from fq_codel to sch_fq in order to support pacing but
> the issue was closed when tcp internal pacing was introduced in linux 4.13:
>
> https://github.com/systemd/systemd/issues/5090
>
> /Jonas
>
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Dave Täht
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