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Re: Current 2.6.x TSO state

To: "David S. Miller" <davem@xxxxxxxxxxxxx>
Subject: Re: Current 2.6.x TSO state
From: Andi Kleen <ak@xxxxxxx>
Date: Fri, 1 Oct 2004 22:01:02 +0200
Cc: Andi Kleen <ak@xxxxxxx>, netdev@xxxxxxxxxxx, jheffner@xxxxxxx, herbert@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20041001125643.30c6830f.davem@xxxxxxxxxxxxx>
References: <20040930213221.06a3f5b3.davem@xxxxxxxxxxxxx> <20041001121123.19511403.ak@xxxxxxx> <20041001124733.1ac4266a.davem@xxxxxxxxxxxxx> <20041001195146.GA23046@xxxxxxxxxxxxx> <20041001125643.30c6830f.davem@xxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
> 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? 

-Andi


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