From: Stephen Hemminger <stephen@networkplumber.org>
To: Jonathan Morton via Bloat <bloat@lists.bufferbloat.net>
Cc: "Jonathan Morton" <chromatix99@gmail.com>,
"Bjørn Ivar Teigen" <bjorn@domos.no>
Subject: Re: [Bloat] Researchers discover major roadblock in alleviating network congestion
Date: Thu, 4 Aug 2022 16:24:40 -0700 [thread overview]
Message-ID: <20220804162440.57fd5201@hermes.local> (raw)
In-Reply-To: <DF20F5F6-E1DA-489E-8057-9A4B7CF966B4@gmail.com>
On Fri, 5 Aug 2022 00:45:12 +0300
Jonathan Morton via Bloat <bloat@lists.bufferbloat.net> wrote:
> > On 4 Aug, 2022, at 3:21 pm, Bjørn Ivar Teigen via Bloat <bloat@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 ;-(
next prev parent reply other threads:[~2022-08-04 23:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-04 12:21 Bjørn Ivar Teigen
2022-08-04 21:45 ` Jonathan Morton
2022-08-04 23:24 ` Stephen Hemminger [this message]
2022-08-04 23:46 ` Daniel Sterling
2022-08-05 0:25 ` Dave Collier-Brown
2022-08-07 14:10 ` Jonathan Morton
2022-08-08 15:34 ` Michael Richardson
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