From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Dave Taht <dave@taht.net>,
Jonathan Morton <chromatix99@gmail.com>,
bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] when does the CoDel part of fq_codel help in the real world?
Date: Fri, 30 Nov 2018 06:51:34 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.20.1811300647530.7766@uplift.swm.pp.se> (raw)
In-Reply-To: <20181129104332.5b2c7de7@xeon-e3>
On Thu, 29 Nov 2018, Stephen Hemminger wrote:
> The problem is that any protocol is mostly blind to the underlying
> network (and that can change). To use dave's analogy it is like being
> put in the driver seat of a vehicle blind folded. When you step on the
> gas you don't know if it is a dragster, jet fighter, or a soviet
> tractor. The only way a protocol can tell is based on the perceived
> inertia and when it runs into things...
Actually, I've made the argument to IETF TCPM that this is not true. You
can be able to communicate earlier data from previous flows on the same
connection so that new flows can re-learn this.
If no flow the past hour has been able to run faster than 1 megabit/s and
always PMTUD to 1460 bytes MTU outbound, then there is good chance that
the next flow will encounter the same thing. Why not use this information
when guessing how things will behave going forward?
--
Mikael Abrahamsson email: swmike@swm.pp.se
next prev parent reply other threads:[~2018-11-30 5:51 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-26 19:08 Pete Heist
2018-11-26 19:28 ` Neal Cardwell
2018-11-27 20:42 ` Dave Taht
2018-11-27 20:54 ` Toke Høiland-Jørgensen
2018-11-27 21:00 ` Dave Taht
2018-11-27 21:05 ` Toke Høiland-Jørgensen
2018-11-26 21:29 ` Jonathan Morton
2018-11-27 9:24 ` Luca Muscariello
2018-11-27 10:26 ` Bless, Roland (TM)
2018-11-27 10:29 ` Luca Muscariello
2018-11-27 10:35 ` Bless, Roland (TM)
2018-11-27 10:40 ` Luca Muscariello
2018-11-27 10:50 ` Mikael Abrahamsson
2018-11-27 11:01 ` Luca Muscariello
2018-11-27 11:21 ` Mikael Abrahamsson
2018-11-27 12:17 ` Jonathan Morton
2018-11-27 13:37 ` Luca Muscariello
2018-11-27 13:49 ` Mikael Abrahamsson
2018-11-27 14:07 ` Luca Muscariello
2018-11-27 14:18 ` Mikael Abrahamsson
2018-11-27 18:44 ` Kathleen Nichols
2018-11-27 19:25 ` Dave Taht
2018-11-27 21:57 ` Roland Bless
2018-11-27 11:53 ` Bless, Roland (TM)
2018-11-27 11:58 ` Luca Muscariello
2018-11-27 12:22 ` Bless, Roland (TM)
2018-11-27 11:06 ` Jonathan Morton
2018-11-27 11:07 ` Michael Welzl
2018-11-29 7:35 ` Dave Taht
2018-11-29 18:43 ` Stephen Hemminger
2018-11-29 19:08 ` Dave Taht
2018-11-30 5:51 ` Mikael Abrahamsson [this message]
2018-11-30 19:02 ` Dave Taht
2018-11-30 19:58 ` Stephen Hemminger
2018-11-27 11:04 ` Michael Welzl
2018-11-27 12:48 ` Bless, Roland (TM)
2018-11-27 11:40 ` Bless, Roland (TM)
2018-11-27 11:43 ` Bless, Roland (TM)
2018-11-29 7:39 ` Dave Taht
2018-11-29 7:45 ` Jonathan Morton
2018-11-29 7:54 ` Dave Taht
2018-11-29 8:09 ` Luca Muscariello
2018-11-29 13:49 ` Bless, Roland (TM)
2018-11-29 8:41 ` Bless, Roland (TM)
2018-11-29 7:33 ` Dave Taht
2018-11-29 8:13 ` Bless, Roland (TM)
2018-11-29 10:00 ` Pete Heist
2018-11-29 16:09 ` Luca Muscariello
2018-11-29 17:07 ` Mario Hock
2018-11-29 22:30 ` Luca Muscariello
2018-11-30 9:55 ` Mario Hock
2018-11-30 10:32 ` Luca Muscariello
2018-11-30 11:04 ` Jonathan Morton
2018-11-30 11:53 ` jf
2018-12-03 9:42 ` Mario Hock
2018-11-27 11:52 ` Toke Høiland-Jørgensen
2018-11-28 3:37 ` [Bloat] AFD Dave Taht
2018-11-27 20:58 ` [Bloat] when does the CoDel part of fq_codel help in the real world? Dave Taht
2018-11-27 22:19 ` Luca Muscariello
2018-11-27 22:30 ` Roland Bless
2018-11-27 23:17 ` Dave Taht
2018-11-28 3:47 ` Kathleen Nichols
2018-11-28 9:56 ` Luca Muscariello
2018-11-28 10:40 ` Dave Taht
2018-11-28 10:48 ` Luca Muscariello
2018-11-28 12:10 ` Bless, Roland (TM)
2018-11-29 7:22 ` Dave Taht
2018-11-29 7:20 ` Dave Taht
2018-11-27 20:50 ` Dave Taht
2018-11-26 21:56 ` Michael Welzl
2018-11-26 22:13 ` Toke Høiland-Jørgensen
2018-11-27 8:54 ` Pete Heist
2018-11-27 9:31 ` Jonathan Morton
2018-11-27 13:19 ` Michael Richardson
2018-11-27 18:59 ` Jonathan Morton
2018-11-27 20:10 ` Dave Taht
2018-11-27 21:17 ` Michael Welzl
2018-11-27 21:20 ` Michael Welzl
2018-11-29 7:11 ` Dave Taht
2018-11-29 7:28 ` [Bloat] incremental deployment, transport and L4S (Re: when does the CoDel part of fq_codel help in the real world?) Mikael Abrahamsson
2018-11-29 7:36 ` Jonathan Morton
2018-11-29 7:46 ` Mikael Abrahamsson
2018-11-29 8:08 ` Michael Welzl
2018-11-29 10:30 ` Jonathan Morton
2018-11-29 12:06 ` Michael Welzl
2018-11-29 12:52 ` Jonathan Morton
2018-11-30 7:54 ` Michael Welzl
2019-02-03 18:20 ` Dave Taht
2018-11-29 12:12 ` Michael Welzl
2018-11-29 12:56 ` Jonathan Morton
2018-11-29 13:30 ` Mikael Abrahamsson
2018-11-29 23:27 ` Jonathan Morton
2018-11-30 6:01 ` Mikael Abrahamsson
2018-11-29 14:06 ` Bless, Roland (TM)
2018-11-29 8:09 ` Jonathan Morton
2018-11-29 8:19 ` Mikael Abrahamsson
2018-11-29 8:34 ` Jonathan Morton
2018-11-29 10:15 ` Sebastian Moeller
2018-11-29 10:53 ` Mikael Abrahamsson
2018-11-30 4:54 ` Dave Taht
2018-11-28 2:04 ` [Bloat] when does the CoDel part of fq_codel help in the real world? Pete Heist
2018-11-28 3:52 ` Dave Taht
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