From: NeilBrown <neilb@suse.de>
To: Jim Kukunas <james.t.kukunas@linux.intel.com>
Cc: hpa@zytor.com, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: arch/86: AVX RAID5 xor checksumming v1
Date: Thu, 19 Apr 2012 10:02:28 +1000 [thread overview]
Message-ID: <20120419100228.05112e58@notabene.brown> (raw)
In-Reply-To: <1334789928-7238-1-git-send-email-james.t.kukunas@linux.intel.com>
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On Wed, 18 Apr 2012 15:58:47 -0700 Jim Kukunas
<james.t.kukunas@linux.intel.com> wrote:
> Hi Folks,
>
> The following patch adds an AVX implementation of the RAID5 xor checksumming
> functions.
>
> This version differs from version 0, in that it:
> 0) checks whether assembler supports AVX
> 1) replaces __attribute__(aligned(32)) with __aligned(32)
> 2) adds do/while(0); to macro blocks
>
> 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
>
Applied, thanks.
(though I remove the blank line at the end of the new file - the voices made
me do it, I had no choice)
NeilBrown
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prev parent reply other threads:[~2012-04-19 0:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-18 22:58 arch/86: AVX RAID5 xor checksumming v1 Jim Kukunas
2012-04-18 22:58 ` [PATCH] raid5: add AVX optimized RAID5 checksumming Jim Kukunas
2012-04-19 0:02 ` NeilBrown [this message]
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