From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [RFC] csum experts, csum_replace2() is too expensive
Date: Thu, 20 Mar 2014 18:56:59 -0700
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Cc: Patrick McHardy <kaber@trash.net>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"H.K. Jerry Chu" <hkchu@google.com>,
	Michael Dalton <mwdalton@google.com>,
	netdev <netdev@vger.kernel.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
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	(Eric Dumazet's message of "Thu, 20 Mar 2014 11:49:01 -0700")
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Eric Dumazet <eric.dumazet@gmail.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@linux.intel.com -- Speaking for myself only