Should be whatever the Linux distro default is. Most people use Ubuntu On Mon, Feb 27, 2023, 4:11 AM Maximilian Bachl wrote: > Yes, the default interface of WSL2 seems to use fq_codel: > > $ tc qdisc show dev eth0 > qdisc mq 0: root > qdisc fq_codel 0: parent :8 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :7 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :6 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :5 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :4 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :3 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :2 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > qdisc fq_codel 0: parent :1 limit 10240p flows 1024 quantum 1514 target > 5.0ms interval 100.0ms memory_limit 32Mb ecn > > On Sat, Feb 25, 2023 at 11:07 PM Dave Taht via Bloat < > bloat@lists.bufferbloat.net> wrote: > >> On Sat, Feb 25, 2023 at 12:54 PM Stephen Hemminger >> wrote: >> > >> > On Sat, 25 Feb 2023 15:37:02 -0500 >> > Michael Richardson via Bloat wrote: >> > >> > > Dave Taht via Bloat 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 >> _______________________________________________ >> Bloat mailing list >> Bloat@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/bloat >> >