From: Jarek Poplawski <jarkao2@gmail.com>
To: Kristian Evensen <kristian.evensen@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: Strange TCP behavior over HSDPA
Date: Tue, 29 Dec 2009 13:36:20 +0000 [thread overview]
Message-ID: <20091229133620.GA9552@ff.dom.local> (raw)
In-Reply-To: <20091229121624.GC7209@ff.dom.local>
On Tue, Dec 29, 2009 at 12:16:24PM +0000, Jarek Poplawski wrote:
> On Tue, Dec 29, 2009 at 10:57:48AM +0000, Jarek Poplawski wrote:
> > Did you try to turn off TCP window scaling btw? Anyway, under the
> > tunnel ([2]), when SACK worked, it saved you a lot of retransmits.
>
> Hmm... Actually, after re-checking, there weren't much more of those
> retransmits at all. In [1] there was one more packet lost, so it took
> a bit longer. In [2] (with SACK) the retransmit started earlier and
> the rcv window was unchanged. So, it rather looks like differences
> in timing of TCP recovery techniques.
Hmm#2... On the other hand, I can imagine cases with a larger data
loss, where working SACK should really save on retransmits.
Jarek P.
next prev parent reply other threads:[~2009-12-29 13:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-28 12:56 Strange TCP behavior over HSDPA Kristian Evensen
2009-12-29 8:30 ` Jarek Poplawski
2009-12-29 9:59 ` Kristian Evensen
2009-12-29 10:57 ` Jarek Poplawski
2009-12-29 12:16 ` Jarek Poplawski
2009-12-29 13:36 ` Jarek Poplawski [this message]
2009-12-29 14:30 ` Kristian Evensen
2009-12-29 18:31 ` Jarek Poplawski
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