Discussion of explicit congestion notification's impact on the Internet
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From: Jonathan Morton <chromatix99@gmail.com>
To: "David P. Reed" <dpreed@deepplum.com>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>,
	"ecn-sane@lists.bufferbloat.net" <ecn-sane@lists.bufferbloat.net>,
	tsvwg IETF list <tsvwg@ietf.org>
Subject: Re: [Ecn-sane] [tsvwg] per-flow scheduling
Date: Mon, 24 Jun 2019 22:31:56 +0300	[thread overview]
Message-ID: <7F847464-70DD-4F9F-8CA5-DD3C8B65689C@gmail.com> (raw)
In-Reply-To: <1561402678.523819778@apps.rackspace.com>

> On 24 Jun, 2019, at 9:57 pm, David P. Reed <dpreed@deepplum.com> wrote:
> 
> TCP doesn't have a "natural sawtooth" - that is the response of TCP to a particular "queueing discipline" in a particular kind of a router - it would respond differently (and does!) if the router were to drop packets randomly on a Poisson basis, for example. No sawtooth at all.

I challenge you to show me a Reno or CUBIC based connection's cwnd evolution that *doesn't* resemble a sawtooth, regardless of the congestion signalling employed.  And I will show you that it either has severe underutilisation of the link, or is using SCE signals.  The sawtooth is characteristic of the AIMD congestion control algorithm.

 - Jonathan Morton

  reply	other threads:[~2019-06-24 19:32 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-19 14:12 [Ecn-sane] " Bob Briscoe
2019-06-19 14:20 ` [Ecn-sane] [tsvwg] " Kyle Rose
2019-06-21  6:59 ` [Ecn-sane] " Sebastian Moeller
2019-06-21  9:33   ` Luca Muscariello
2019-06-21 20:37     ` [Ecn-sane] [tsvwg] " Brian E Carpenter
2019-06-22 19:50       ` David P. Reed
2019-06-22 20:47         ` Jonathan Morton
2019-06-22 22:03           ` Luca Muscariello
2019-06-22 22:09           ` David P. Reed
2019-06-22 23:07             ` Jonathan Morton
2019-06-24 18:57               ` David P. Reed
2019-06-24 19:31                 ` Jonathan Morton [this message]
2019-06-24 19:50                   ` David P. Reed
2019-06-24 20:14                     ` Jonathan Morton
2019-06-25 21:05                       ` David P. Reed
2019-06-24 21:25                   ` Luca Muscariello
2019-06-26 12:48             ` Sebastian Moeller
2019-06-26 16:31               ` David P. Reed
2019-06-26 16:53                 ` David P. Reed
2019-06-27  7:54                   ` Sebastian Moeller
2019-06-27  7:49                 ` Sebastian Moeller
2019-06-27 20:33                   ` Brian E Carpenter
2019-06-27 21:31                     ` David P. Reed
2019-06-28  7:49                       ` Toke Høiland-Jørgensen
2019-06-27  7:53                 ` Bless, Roland (TM)
2019-06-22 21:10         ` Brian E Carpenter
2019-06-22 22:25           ` David P. Reed
2019-06-22 22:30             ` Luca Muscariello
2019-07-17 21:33 ` [Ecn-sane] " Sebastian Moeller
2019-07-17 22:18   ` David P. Reed
2019-07-17 22:34     ` David P. Reed
2019-07-17 23:23       ` Dave Taht
2019-07-18  0:20         ` Dave Taht
2019-07-18  5:30           ` Jonathan Morton
2019-07-18 15:02         ` David P. Reed
2019-07-18 16:06           ` Dave Taht
2019-07-18  4:31     ` Jonathan Morton
2019-07-18 15:52       ` David P. Reed
2019-07-18 18:12         ` [Ecn-sane] [tsvwg] " Dave Taht
2019-07-18  5:24     ` [Ecn-sane] " Jonathan Morton
2019-07-22 13:44       ` Bob Briscoe
2019-07-23  5:00         ` Jonathan Morton
2019-07-23 11:35           ` [Ecn-sane] CNQ cheap-nasty-queuing (was per-flow queuing) Luca Muscariello
2019-07-23 20:14           ` [Ecn-sane] per-flow scheduling Bob Briscoe
2019-07-23 22:24             ` Jonathan Morton
2019-07-23 15:12         ` [Ecn-sane] [tsvwg] " Kyle Rose
2019-07-25 19:25           ` Holland, Jake
2019-07-27 15:35             ` Kyle Rose
2019-07-27 19:42               ` Jonathan Morton

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