netdev - Re: [RFC] csum experts, csum_replace2() is too expensive

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Message-ID: <20140321125035.GA24469@gondor.apana.org.au>
Date:	Fri, 21 Mar 2014 20:50:35 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"H.K. Jerry Chu" <hkchu@...gle.com>,
	Michael Dalton <mwdalton@...gle.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [RFC] csum experts, csum_replace2() is too expensive

On Thu, Mar 20, 2014 at 05:54:17PM -0700, Eric Dumazet wrote:
> On Fri, 2014-03-21 at 08:13 +0800, Herbert Xu wrote:
> 
> > Your patch makes sense to me.  However does it actually help
> > your 1% in the GRO profile?
> 
> Well, I caught this strange csum_partial() presence in a profile,
> but my question was more general than the GRO use case.
> 
> (BTW the patch didn't even compile ;) )
> 
> I guess that in GRO case, the following would be even faster...

Agreed.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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