linux-kernel - Re: arch/86: AVX RAID5 xor checksumming

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Message-ID: <4F846FBC.9060503@zytor.com>
Date:	Tue, 10 Apr 2012 10:37:00 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jim Kukunas <james.t.kukunas@...ux.intel.com>
CC:	x86@...nel.org, neilb@...e.de, linux-kernel@...r.kernel.org,
	mingo@...hat.com, tglx@...utronix.de, linux-raid@...r.kernel.org
Subject: Re: arch/86: AVX RAID5 xor checksumming

On 04/10/2012 10:22 AM, Jim Kukunas wrote:
> Hi Folks,
> 
> The following patch adds an AVX implementation of the RAID5 xor checksumming
> functions.
> 
> Based on xor_speed, the AVX implementation appears to be ~32% faster than the
> SSE implementation on my i7 2600:
> 
>         generic_sse: 15088.000 MB/sec
> 	avx: 19936.000 MB/sec
> 
> Thanks.
> 

I think this (and the SSSE3 patches for RAID-6) should go in via the
RAID tree.  Neil, do you agree?

However,

Acked-by: H. Peter Anvin <hpa@...or.com>

	-hpa

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