<div dir="auto">Should be whatever the Linux distro default is. Most people use Ubuntu </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 27, 2023, 4:11 AM Maximilian Bachl <<a href="mailto:maximilian.bachl@gmail.com" target="_blank" rel="noreferrer">maximilian.bachl@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Yes, the default interface of WSL2 seems to use fq_codel: </div><div><br></div><font face="monospace">$ tc qdisc show dev eth0<br>qdisc mq 0: root<br>qdisc fq_codel 0: parent :8 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :7 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :6 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :5 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :4 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :3 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :2 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn<br>qdisc fq_codel 0: parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn</font><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Feb 25, 2023 at 11:07 PM Dave Taht via Bloat <<a href="mailto:bloat@lists.bufferbloat.net" rel="noreferrer noreferrer" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Sat, Feb 25, 2023 at 12:54 PM Stephen Hemminger<br>
<<a href="mailto:stephen@networkplumber.org" rel="noreferrer noreferrer" target="_blank">stephen@networkplumber.org</a>> wrote:<br>
><br>
> On Sat, 25 Feb 2023 15:37:02 -0500<br>
> Michael Richardson via Bloat <<a href="mailto:bloat@lists.bufferbloat.net" rel="noreferrer noreferrer" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br>
><br>
> > Dave Taht via Bloat <<a href="mailto:bloat@lists.bufferbloat.net" rel="noreferrer noreferrer" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br>
> > > I so want to believe... I so want to believe... can anyone confirm?<br>
> ><br>
> > > <a href="https://raw.githubusercontent.com/microsoft/WSL2-Linux-Kernel/linux-msft-wsl-5.15.y/Microsoft/config-wsl" rel="noreferrer noreferrer noreferrer" target="_blank">https://raw.githubusercontent.com/microsoft/WSL2-Linux-Kernel/linux-msft-wsl-5.15.y/Microsoft/config-wsl</a><br>
> ><br>
> > But, AFAIK, WSL isn't a kernel. It's an implementation of the Linux ABI on<br>
> > top of Windows service(s). If you told me that they build some of it from<br>
> > actual Linux kernel sources, I'd believe you. (Rather like User-Mode-Linux)<br>
> ><br>
> > If you told me that they have a kernel that they build for when they actually<br>
> > spin up an actual VM (such as to run containers) that would also be unsurprising.<br>
> ><br>
> > > ...<br>
> ><br>
> > > CONFIG_NET_SCH_DEFAULT=y<br>
> > > CONFIG_DEFAULT_FQ_CODEL=y<br>
> > > # CONFIG_DEFAULT_PFIFO_FAST is not set<br>
> > > CONFIG_DEFAULT_NET_SCH="fq_codel"<br>
> ><br>
> > It would be nice if the billion windows desktops started doing<br>
> > something better, but I don't think it will help observed latency.<br>
> > The real question is what the default schedule for the default Azure Linux VM<br>
> > is.<br>
> ><br>
><br>
> I think WSL2 is actually a full Linux VM running in Hyper-V.<br>
<br>
Yes, it is. But it is kind of unknown how the underlying network<br>
interface is behaving in this case, as well as what the actual default<br>
qdisc is, and this not just a random gist. It was VERY exciting to see<br>
that gist go by...<br>
<br>
are there no windows users on this list? :/ We long ago should have<br>
pursued at least flent, and a TCP_INFO equivalent sampling method for<br>
windows. The closest thing we have for windows is the rust-based:<br>
<a href="https://github.com/Zoxc/crusader" rel="noreferrer noreferrer noreferrer" target="_blank">https://github.com/Zoxc/crusader</a><br>
<br>
-- <br>
A pithy note on VOQs vs SQM: <a href="https://blog.cerowrt.org/post/juniper/" rel="noreferrer noreferrer noreferrer" target="_blank">https://blog.cerowrt.org/post/juniper/</a><br>
Dave Täht CEO, TekLibre, LLC<br>
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</blockquote></div>
</blockquote></div>