netdev - RE: A Linux TCP SACK Question

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Message-ID: <Pine.LNX.4.64.0804052041480.8668@wrl-59.cs.helsinki.fi>
Date:	Sat, 5 Apr 2008 20:42:19 +0300 (EEST)
From:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
To:	Wenji Wu <wenji@...l.gov>
cc:	'John Heffner' <johnwheffner@...il.com>,
	'Netdev' <netdev@...r.kernel.org>
Subject: RE: A Linux TCP SACK Question

On Fri, 4 Apr 2008, Wenji Wu wrote:

> 
> >...Assuming it wasn't disabled already. If you find that there's 
> >significant difference, you could try also with SACK+basic FRTO (set 
> >the tcp_frto sysctl to 1).
> 
> No, still the same. I tried tcp_frto with 0, 1, 2. 
> 
> SACK On is worse than SACK off.

No easy solution then, we'll have to take a look on tcpdumps.

-- 
 i.
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