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Message-Id: <20120926.125516.829958573312746035.davem@davemloft.net>
Date: Wed, 26 Sep 2012 12:55:16 -0400 (EDT)
From: David Miller <davem@...emloft.net>
To: tim.c.chen@...ux.intel.com
Cc: herbert@...dor.apana.org.au, hpa@...or.com,
wajdi.k.feghali@...el.com, james.guilford@...el.com,
david.m.cote@...el.com, suresh.b.siddha@...el.com,
chaohong.guo@...el.com, austin_zhang@...ux.intel.com,
linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [PATCH 0/3] Optimize CRC32C calculation using PCLMULQDQ in
crc32c-intel module
From: Tim Chen <tim.c.chen@...ux.intel.com>
Date: Tue, 25 Sep 2012 14:50:08 -0700
> This patch series optimized CRC32C calculations with PCLMULQDQ
> instruction for crc32c-intel module. It speeds up the original
> implementation by 1.6x for 1K buffer and by 3x for buffer 4k or
> more. The tcrypt module was enhanced for doing speed test
> on crc32c calculations.
>
> Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>
Great work.
I intend to do something nearly identical on sparc64 since we have
similar instructions in the form of "xmulx" and "xmulxhi" which return
the lower and upper 64-bits (respectively) of a XOR multiply.
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