[Bloat] Researchers discover major roadblock in alleviating network congestion

[Daniel Sterling]

"Flow control power is non-decentralizable" is from -- 1981? So we've
known for 40 years that TCP streams won't play nicely with each other
unless you shape them at the slower endpoint-- am I understanding that
correctly? But we keep trying anyway? :)

On Thu, Aug 4, 2022 at 7:24 PM Stephen Hemminger via Bloat
<bloat at lists.bufferbloat.net> wrote:
>
> On Fri, 5 Aug 2022 00:45:12 +0300
> Jonathan Morton via Bloat <bloat at lists.bufferbloat.net> wrote:
>
> > > On 4 Aug, 2022, at 3:21 pm, Bjørn Ivar Teigen via Bloat <bloat at lists.bufferbloat.net> wrote:
> > >
> > > Main take-away (as I understand it) is something like "In real-world networks, jitter adds noise to the end-to-end delay such that any algorithm trying to infer congestion from end-to-end delay measurements will occasionally get it wrong and this can lead to starvation". Seems related to Jaffe's work on network power (titled "Flow control power is non-decentralizable").
> >
> > Hasn't this been known for many years, as a consequence of experience with TCP Vegas?
> >
> >  - Jonathan Morton
>
> It seems like BBR developers thought they could do better. Unfortunately, papers with negative
> results never seem to get written or published ;-(
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