netdev - Re: Patch for tbench regression.

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Message-ID: <20080929053605.GA21663@2ka.mipt.ru>
Date:	Mon, 29 Sep 2008 09:36:06 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	netdev@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, David Miller <davem@...emloft.net>,
	Lennert Buytenhek <buytenh@...vell.com>
Subject: Re: Patch for tbench regression.

On Mon, Sep 29, 2008 at 11:12:44AM +0800, Herbert Xu (herbert@...dor.apana.org.au) wrote:
> Can you see if reverting the patch but using ethtool gives you the
> same results?

Yes, I disabled gso and tso on vanilla 2.6.27-rc7 via ethtools and
got the same results:

$ sudo ethtool -k lo
Offload parameters for lo:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: off
udp fragmentation offload: off
generic segmentation offload: off

1 proc: 195 mb
4 proc: 195 mb

$ sudo ethtool -k lo
Offload parameters for lo:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: on
udp fragmentation offload: off
generic segmentation offload: on

1 proc: 190 mb
4 proc: 189 mb

-- 
	Evgeniy Polyakov
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