[Bloat] Researchers discover major roadblock in alleviating network congestion

[Dave Collier-Brown]

Yup!

My company just decided that routing fallbacks, like the ARPA NIMs had,
weren't necessary. Right after the Rogers BGP fiasco that cut off 50% of
Canada from the internet...

Bother!

--dave

On 8/4/22 19:46, Daniel Sterling via Bloat wrote:
> "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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--
David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
dave.collier-brown at indexexchange.com |              -- Mark Twain


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