<div dir="ltr">Speaking about systemd defaults, they just enabled ecn for outgoing connections:<div><br></div><div><a href="https://github.com/systemd/systemd/pull/9143">https://github.com/systemd/systemd/pull/9143</a><br></div><div><br></div><div>/Jonas</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 4, 2018 at 7:08 PM, Dave Taht <span dir="ltr"><<a href="mailto:dave.taht@gmail.com" target="_blank">dave.taht@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Mon, Jun 4, 2018 at 6:16 AM, Jonas Mårtensson<br>
<<a href="mailto:martensson.jonas@gmail.com">martensson.jonas@gmail.com</a>> wrote:<br>
><br>
><br>
> On Mon, Jun 4, 2018 at 1:28 PM, Bless, Roland (TM) <<a href="mailto:roland.bless@kit.edu">roland.bless@kit.edu</a>><br>
> wrote:<br>
>><br>
>> Hi,<br>
>><br>
>> Am 24.05.2018 um 17:38 schrieb Jan Ceuleers:<br>
>> > Took 3 years after Dave approached them, but Ubuntu is finally adopting<br>
>> > fq_codel as the default qdisc.<br>
>><br>
>> Yes, if the Linux kernel is forwarding packets it makes a lot of sense,<br>
>> but I don't understand why it make sense for ordinary end-systems.<br>
>> Didn't Byte Queue Limits (BQL) suffice? Just curious...<br>
><br>
><br>
> Actually, for a long time now the codel wiki has recommended using sch_fq<br>
> instead of fq_codel for servers.<br>
<br>
</span>That recommendation predates the tcp pacing change you note below.<br>
<br>
I'm pretty convinced fq_codel is now the best all around "default"<br>
qdisc, and we should rework our recomendation.<br>
<span class="im HOEnZb"><br>
> It seems Ubuntu defaulting to fq_codel is a result of using systemd which<br>
> adopted it as default almost 4 years ago. There was a request to change the<br>
> default in systemd from fq_codel to sch_fq in order to support pacing but<br>
> the issue was closed when tcp internal pacing was introduced in linux 4.13:<br>
><br>
> <a href="https://github.com/systemd/systemd/issues/5090" rel="noreferrer" target="_blank">https://github.com/systemd/<wbr>systemd/issues/5090</a><br>
><br>
> /Jonas<br>
><br>
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><br>
<br>
<br>
<br>
</div></div><span class="HOEnZb"><font color="#888888">-- <br>
<br>
Dave Täht<br>
CEO, TekLibre, LLC<br>
<a href="http://www.teklibre.com" rel="noreferrer" target="_blank">http://www.teklibre.com</a><br>
Tel: 1-669-226-2619<br>
</font></span></blockquote></div><br></div>