From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@davemloft.net>
Subject: Re: Current 2.6.x TSO state
Date: Fri, 1 Oct 2004 13:15:34 -0700
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To: Andi Kleen <ak@suse.de>
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On Fri, 1 Oct 2004 22:01:02 +0200
Andi Kleen <ak@suse.de> wrote:

> > As mentioned, the TCP receive buffer auto-tuning takes care
> > of all of this in 2.6.6 and later.  It's just 2.6.5 doesn't
> > have John Heffner's auto-tuning code which is why your test
> > case is so stuck in the mud.
> > 
> > Also, the stretch ACK's are quite normal.  If the receiver can't
> > advertize a larger window, we won't spit out an ACK until
> > the ack timeout.
> 
> Ok, but why is the TSO case still slower? 

It isn't for me.  With the auto-tuning code present at the
receiver, at least in my case, the TSO case runs more quickly
since my sender is PCI bandwidth limited since the tg3 sits
on a 32mhz/33bit PCI bus.