From: Eric Dumazet <eric.dumazet@gmail.com>
To: rick.jones2@hp.com
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] Random idea in reaction to all the discussion of TCP flavours - timestamps?
Date: Fri, 18 Mar 2011 06:51:48 +0100 [thread overview]
Message-ID: <1300427508.2881.2.camel@edumazet-laptop> (raw)
In-Reply-To: <1300400436.2087.2401.camel@tardy>
Le jeudi 17 mars 2011 à 15:20 -0700, Rick Jones a écrit :
> I would think that unless the rest of the segments of the connection
> will also bypass most of the traffic, the SYN or SYN|ACK should not
> bypass - to do so will give the TCP connection a low, unrealistic
> initial estimate of the RTT. Given the recent change in Linux upstream
> to go to cwnd_init of 10 segments, and the prospect of other stacks
> following that lead in implementing the draft RFC, if there is a big
> slow queue of traffic that the data segments will not bypass, it would
> seem better to have the SYN or SYN|ACK get delayed and retransmitted to
> get the cwnd down.
>
> SYN and SYN|ACK segments should not receive special treatment beyond
> what data segments for the same connection would get.
Agreed. RFC 3168 (The Addition of Explicit Congestion Notification (ECN)
to IP) discuss of this topic, and goes further : SYN packets, or
retransmitted packets dont have ECT marker : They have higher
probabilities to be dropped by ECN routers than marked and pass the
congestion point.
next prev parent reply other threads:[~2011-03-18 5:51 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-15 10:36 Jim Gettys
2011-03-15 14:40 ` Jim Gettys
2011-03-15 16:47 ` Jonathan Morton
2011-03-15 17:59 ` Don Marti
2011-03-15 18:14 ` Rick Jones
2011-03-15 18:31 ` John W. Linville
2011-03-15 19:40 ` Jonathan Morton
2011-03-15 19:59 ` Rick Jones
2011-03-15 20:51 ` John W. Linville
2011-03-15 21:31 ` Rick Jones
2011-03-16 0:32 ` John W. Linville
2011-03-16 1:02 ` Rick Jones
2011-03-15 22:01 ` Jonathan Morton
2011-03-15 22:19 ` Stephen Hemminger
2011-03-15 22:26 ` Jonathan Morton
2011-03-15 22:36 ` Rick Jones
2011-03-15 22:40 ` Jonathan Morton
2011-03-15 22:42 ` Stephen Hemminger
2011-03-15 22:52 ` Eric Dumazet
2011-03-15 23:02 ` Rick Jones
2011-03-15 23:12 ` Jonathan Morton
2011-03-15 23:25 ` Rick Jones
2011-03-15 23:33 ` Jonathan Morton
2011-03-15 23:46 ` Dave Täht
2011-03-16 0:49 ` Jonathan Morton
2011-03-16 1:02 ` Dave Täht
2011-03-16 1:28 ` Jonathan Morton
2011-03-16 1:59 ` Dave Täht
2011-03-16 2:23 ` Jonathan Morton
2011-03-16 22:22 ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-16 23:38 ` richard
2011-03-16 23:50 ` Rick Jones
2011-03-17 12:05 ` Fred Baker
2011-03-17 12:18 ` Fred Baker
2011-03-17 17:27 ` Dave Täht
2011-03-18 18:30 ` Richard Scheffenegger
2011-03-18 18:49 ` Fred Baker
2011-03-20 11:40 ` Jonathan Morton
2011-03-20 22:18 ` david
2011-03-20 22:45 ` Jonathan Morton
2011-03-20 22:50 ` Dave Täht
2011-03-20 22:55 ` grenville armitage
2011-03-20 23:04 ` Dave Täht
2011-03-20 23:14 ` Jonathan Morton
2011-03-20 23:19 ` Dave Täht
2011-03-20 23:23 ` Dave Täht
2011-03-20 22:58 ` Jonathan Morton
2011-03-21 1:28 ` david
2011-03-21 1:56 ` Wesley Eddy
2011-03-18 18:27 ` [Bloat] Random idea in reaction to all the discussion ofTCPflavours " Richard Scheffenegger
2011-03-16 22:07 ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-17 0:10 ` Jonathan Morton
2011-03-16 0:47 ` [Bloat] Random idea in reaction to all the discussion of TCP flavours " John W. Linville
2011-03-16 20:07 ` Jim Gettys
2011-03-17 2:26 ` Jonathan Morton
2011-03-17 18:22 ` Rick Jones
2011-03-17 21:50 ` Jonathan Morton
2011-03-17 22:20 ` Rick Jones
2011-03-17 22:56 ` Jonathan Morton
2011-03-18 1:36 ` Justin McCann
2011-03-18 5:51 ` Eric Dumazet [this message]
2011-03-15 16:34 ` Jonathan Morton
2011-03-15 18:13 ` Stephen Hemminger
2011-03-16 5:41 ` Fred Baker
2011-03-16 6:26 ` Jonathan Morton
2011-03-16 8:55 ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-16 9:04 ` [Bloat] Random idea in reaction to all the discussion of TCP flavours " BeckW
2011-03-16 22:48 ` Fred Baker
2011-03-16 23:23 ` Jonathan Morton
2011-03-17 8:34 ` BeckW
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