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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 21:51:47 +0200
Cc: Andi Kleen <ak@xxxxxxx>, netdev@xxxxxxxxxxx, jheffner@xxxxxxx, herbert@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20041001124733.1ac4266a.davem@xxxxxxxxxxxxx>
References: <20040930213221.06a3f5b3.davem@xxxxxxxxxxxxx> <20041001121123.19511403.ak@xxxxxxx> <20041001124733.1ac4266a.davem@xxxxxxxxxxxxx>
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On Fri, Oct 01, 2004 at 12:47:33PM -0700, David S. Miller wrote:
> On Fri, 1 Oct 2004 12:11:23 +0200
> Andi Kleen <ak@xxxxxxx> wrote:
> 
> > Do you want me to play with the new sysctl too?
> 
> Yes.

Already did, see my other mail (I should not read incoming mail in the wrong 
order @)
> 
> >      max win adv:            5840 bytes     max win adv:           63712 
> > bytes
> >      min win adv:            5840 bytes     min win adv:            5792 
> > bytes
> 
> That stinks that the receiver is only using a 64K window,
> that's way too small for gigabit.

Just using the default, no tuning.

I have some patches in the pipeline to do automatic window tuning
based on link speed based on dev->features. But they were actually more 
intended for 10Gbit/s (where all the defaults are completely inadequate)  
And it needs a bit more work. 

-Andi


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