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From: David Miller <davem@davemloft.net>
To: tim.c.chen@linux.intel.com
Cc: herbert@gondor.hengli.com.au, hpa@zytor.com,
	wajdi.k.feghali@intel.com, james.guilford@intel.com,
	david.m.cote@intel.com, suresh.b.siddha@intel.com,
	chaohong.guo@intel.com, austin_zhang@linux.intel.com,
	linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH 0/3] Optimize CRC32C calculation using PCLMULQDQ in crc32c-intel module
Date: Wed, 26 Sep 2012 12:55:16 -0400 (EDT)	[thread overview]
Message-ID: <20120926.125516.829958573312746035.davem@davemloft.net> (raw)
In-Reply-To: <1348609808.9977.205.camel@schen9-DESK>

From: Tim Chen <tim.c.chen@linux.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@linux.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.


  reply	other threads:[~2012-09-26 16:55 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.1348599489.git.tim.c.chen@linux.intel.com>
2012-09-25 21:50 ` Tim Chen
2012-09-26 16:55   ` David Miller [this message]
2012-09-27  5:45   ` Herbert Xu
2012-09-25 21:50 ` [PATCH 1/3] Rename crc32c-intel.c to crc32c-intel_glue.c Tim Chen
2012-09-25 21:50 ` [PATCH 2/3] Optimize CRC32C calculation with PCLMULQDQ instruction Tim Chen
2012-09-25 21:50 ` [PATCH 3/3] Added speed test in tcrypt for crc32c Tim Chen

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