From: Andi Kleen <ak@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: jordy@napster.com, linux-kernel@vger.kernel.org, kuznet@ms2.inr.ac.ru
Subject: Re: Poor TCP Performance 2.4.0-10 <-> Win98 SE PPP
Date: Tue, 7 Nov 2000 08:03:42 +0100 [thread overview]
Message-ID: <20001107080342.A2159@gruyere.muc.suse.de> (raw)
In-Reply-To: <3A07662F.39D711AE@napster.com> <200011070428.UAA01710@pizda.ninka.net> <3A079127.47B2B14C@napster.com> <200011070533.VAA02179@pizda.ninka.net> <3A079D83.2B46A8FD@napster.com> <200011070603.WAA02292@pizda.ninka.net>
In-Reply-To: <200011070603.WAA02292@pizda.ninka.net>; from davem@redhat.com on Mon, Nov 06, 2000 at 10:03:05PM -0800
On Mon, Nov 06, 2000 at 10:03:05PM -0800, David S. Miller wrote:
> The only thing I can do now is beg for a tcpdump from the windows95
> machine side. Do you have the facilities necessary to obtain this?
> This would prove that it is packet drop between the two systems, for
> whatever reason, that is causing this.
It looks very like to me like a poster child for the non timestamp
RTT update problem I just described on netdev. Linux always retransmits
too early and there is never a better RTT estimate which could fix it.
2.4's advertised windows also do not seem to cope with weird window
advertising strategy of windows (start with a small window and then
suddenly increase it). Linux's stays small.
-Andi
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next prev parent reply other threads:[~2000-11-07 7:04 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-07 6:13 Jordan Mendelson
2000-11-07 2:17 ` Jordan Mendelson
2000-11-07 4:28 ` David S. Miller
2000-11-07 5:20 ` Jordan Mendelson
2000-11-07 5:33 ` David S. Miller
2000-11-07 6:03 ` David S. Miller
2000-11-07 6:44 ` Jordan Mendelson
2000-11-07 6:56 ` David S. Miller
2000-11-07 7:12 ` David S. Miller
2000-11-07 7:27 ` David S. Miller
2000-11-07 9:41 ` Andi Kleen
2000-11-07 9:57 ` David S. Miller
2000-11-07 7:32 ` Jordan Mendelson
2000-11-07 12:22 ` Alan Cox
2000-11-07 12:10 ` David S. Miller
2000-11-07 7:16 ` Jordan Mendelson
2000-11-07 9:42 ` Andi Kleen
2000-11-07 18:13 ` Jordan Mendelson
2000-11-07 9:38 ` Rogier Wolff
2000-11-07 9:58 ` David S. Miller
2000-11-07 10:36 ` Rogier Wolff
2000-11-07 6:59 ` David S. Miller
2000-11-07 7:14 ` David S. Miller
2000-11-07 7:16 ` Andi Kleen
2000-11-07 7:03 ` Andi Kleen [this message]
2000-11-07 22:43 ` Lincoln Dale
2000-11-07 9:35 ` Rogier Wolff
2000-11-07 10:00 ` David S. Miller
[not found] <3A076701.F437F88B@napster.com>
2000-11-07 3:44 ` Jordan Mendelson
2000-11-07 4:29 ` David S. Miller
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