Re: [Cake] tossing acks into the background queue

[Dave Taht <dave.taht@gmail.com>]

https://forum.openwrt.org/t/making-cake-multicore-or-other-new-features/112623

On Mon, Nov 22, 2021 at 11:32 PM Dave Taht <dave.taht@gmail.com> wrote:
>
> The context of my question is basically this:
>
> Is cake baked? Is it done?
>
> Is there anything from libreQos that would be better in C?
>
> On Mon, Nov 22, 2021 at 11:17 PM Dave Taht <dave.taht@gmail.com> wrote:
> >
> > On Mon, Nov 22, 2021 at 11:07 PM Sebastian Moeller <moeller0@gmx.de> wrote:
> > >
> > > Hi Dave,
> > >
> > >
> > > On 23 November 2021 06:03:03 CET, Dave Taht <dave.taht@gmail.com> wrote:
> > > >ages ago I'd (we'd? I really don't remember - forgive me if I've
> > > >forgotten who actually leaned in on it) written a basic ack-filter in
> > > >ebpf. this was before cake gained tc actions and my primary use for
> > > >the tech was for asymmetric connections, and before the good
> > > >ack-filter arrived, and I was (and remain) unfriendly to this level of
> > > >dpi.
> > > >
> > > >That said, on a symmetric connection, deprioritizing pure acks to the
> > > >5% background queue nd then turning the cake ack-filter loose on it
> > > >might actually work.
> > > >
> > > >Am I on drugs/is there any point?
> > >
> > > I think at leat when using multiple priority tins forward and reverse traffic should by default use the same tin (I can see non-standard situations that want differential treatment). The argument is that unlike earlier attempts at ingress shaping that tried to throttle reverse ACKs? cake/codel do proper 'hit the brakes' signalling via marking/dropping and we want that signal to reach the other end as quickly as possible, no?
> >
> > My thought was basically an optional filter that steered all pure acks
> > (no matter the classification) into the background queue.
> > Non-pure-acks (sacks) essentially jump the background queue and signal
> > that loss earlier. The backlog of other acks in background get
> > delivered out of order, but purely out of order and discarded by the
> > reciever.
> >
> > > Regards
> > >         Sebastian
> > >
> > >
> > > >
> > > >
> > > >
> > > >--
> > > >I tried to build a better future, a few times:
> > > >https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org
> > > >
> > > >Dave Täht CEO, TekLibre, LLC
> > > >_______________________________________________
> > > >Cake mailing list
> > > >Cake@lists.bufferbloat.net
> > > >https://lists.bufferbloat.net/listinfo/cake
> > >
> > > --
> > > Sent from my Android device with K-9 Mail. Please excuse my brevity.
> >
> >
> >
> > --
> > I tried to build a better future, a few times:
> > https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org
> >
> > Dave Täht CEO, TekLibre, LLC
>
>
>
> --
> I tried to build a better future, a few times:
> https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org
>
> Dave Täht CEO, TekLibre, LLC



-- 
I tried to build a better future, a few times:
https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org

Dave Täht CEO, TekLibre, LLC