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

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Message-ID: <87a9cknwk4.fsf@tassilo.jf.intel.com>
Date:	Thu, 20 Mar 2014 18:56:59 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"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

Eric Dumazet <eric.dumazet@...il.com> writes:
>
> I saw csum_partial() consuming 1% of cpu cycles in a GRO workload, that
> is insane...


Couldn't it just be the cache miss?

-Andi


-- 
ak@...ux.intel.com -- Speaking for myself only
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