netdev - Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

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Date:	Fri, 01 Nov 2013 12:45:29 -0700
From:	Joe Perches <joe@...ches.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	David Laight <David.Laight@...LAB.COM>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Doug Ledford <dledford@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

On Fri, 2013-11-01 at 13:37 -0400, Neil Horman wrote:

> I think it would be better if we just did the prefetch here
> and re-addressed this area when AVX (or addcx/addox) instructions were available
> for testing on hardware.

Could there be a difference if only a single software
prefetch was done at the beginning of transfer before
the while loop and hardware prefetches did the rest?



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