From: Daniel Sterling <sterling.daniel@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "Jonathan Morton via Bloat" <bloat@lists.bufferbloat.net>,
"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 19:46:04 -0400 [thread overview]
Message-ID: <CAJZMiuce845VnbNWsKiqS7XZgBC5KaptxnW+oOpuQPxWMhzWww@mail.gmail.com> (raw)
In-Reply-To: <20220804162440.57fd5201@hermes.local>
"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@lists.bufferbloat.net> wrote:
>
> 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 ;-(
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
next prev parent reply other threads:[~2022-08-04 23:46 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
2022-08-04 23:46 ` Daniel Sterling [this message]
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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