From: Dave Taht <dave.taht@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Michael Richardson via Bloat <bloat@lists.bufferbloat.net>,
Michael Richardson <mcr@sandelman.ca>
Subject: Re: [Bloat] WSL2 + fq_codel
Date: Sat, 25 Feb 2023 14:07:34 -0800 [thread overview]
Message-ID: <CAA93jw7Dqk1eqyfatTBkQ3yssWQT+Djgyk1dcZ1Qs9+yapZZpA@mail.gmail.com> (raw)
In-Reply-To: <20230225125425.7d440ba9@hermes.local>
On Sat, Feb 25, 2023 at 12:54 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> On Sat, 25 Feb 2023 15:37:02 -0500
> Michael Richardson via Bloat <bloat@lists.bufferbloat.net> wrote:
>
> > Dave Taht via Bloat <bloat@lists.bufferbloat.net> wrote:
> > > I so want to believe... I so want to believe... can anyone confirm?
> >
> > > https://raw.githubusercontent.com/microsoft/WSL2-Linux-Kernel/linux-msft-wsl-5.15.y/Microsoft/config-wsl
> >
> > But, AFAIK, WSL isn't a kernel. It's an implementation of the Linux ABI on
> > top of Windows service(s). If you told me that they build some of it from
> > actual Linux kernel sources, I'd believe you. (Rather like User-Mode-Linux)
> >
> > If you told me that they have a kernel that they build for when they actually
> > spin up an actual VM (such as to run containers) that would also be unsurprising.
> >
> > > ...
> >
> > > CONFIG_NET_SCH_DEFAULT=y
> > > CONFIG_DEFAULT_FQ_CODEL=y
> > > # CONFIG_DEFAULT_PFIFO_FAST is not set
> > > CONFIG_DEFAULT_NET_SCH="fq_codel"
> >
> > It would be nice if the billion windows desktops started doing
> > something better, but I don't think it will help observed latency.
> > The real question is what the default schedule for the default Azure Linux VM
> > is.
> >
>
> I think WSL2 is actually a full Linux VM running in Hyper-V.
Yes, it is. But it is kind of unknown how the underlying network
interface is behaving in this case, as well as what the actual default
qdisc is, and this not just a random gist. It was VERY exciting to see
that gist go by...
are there no windows users on this list? :/ We long ago should have
pursued at least flent, and a TCP_INFO equivalent sampling method for
windows. The closest thing we have for windows is the rust-based:
https://github.com/Zoxc/crusader
--
A pithy note on VOQs vs SQM: https://blog.cerowrt.org/post/juniper/
Dave Täht CEO, TekLibre, LLC
next prev parent reply other threads:[~2023-02-25 22:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-25 18:54 Dave Taht
2023-02-25 20:37 ` Michael Richardson
2023-02-25 20:54 ` Stephen Hemminger
2023-02-25 22:07 ` Dave Taht [this message]
2023-02-27 12:10 ` Maximilian Bachl
2023-02-27 23:32 ` Stephen Hemminger
2023-02-27 23:36 ` Dave Taht
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