[Bloat] Researchers discover major roadblock in alleviating network congestion

Stephen Hemminger stephen at networkplumber.org
Thu Aug 4 19:24:40 EDT 2022


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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