linux-kernel - Re: e1000 full-duplex TCP performance well below wire speed

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Message-ID: <Pine.LNX.4.63.0801300736040.10711@trinity.phys.uwm.edu>
Date:	Wed, 30 Jan 2008 07:38:56 -0600 (CST)
From:	Bruce Allen <ballen@...vity.phys.uwm.edu>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
cc:	Henning Fehrmann <henning.fehrmann@....mpg.de>,
	Andi Kleen <andi@...stfloor.org>,
	Carsten Aulbert <carsten.aulbert@....mpg.de>,
	Bruce Allen <bruce.allen@....mpg.de>
Subject: Re: e1000 full-duplex TCP performance well below wire speed

Hi Andi,

Thanks for the reply.

> You forgot to specify what user programs you used to get to the 
> benchmark results. e.g. if the user space does not use large enough 
> reads/writes then performance will be not optimal.

We used netperf (as stated in the first paragraph of the original post). 
Tell us if you want the command line.  Previous testing with older kernels 
and broadcom NICS has shown full-duplex wire speed.

> Also best you repost your results with full information on 
> netdev@...r.kernel.org

Wilco.  Just subscribing now.

Cheers,
 	Bruce
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