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Date: Sun, 04 Sep 2011 13:17:27 -0400 From: "Martin K. Petersen" <martin.petersen@...cle.com> To: "Andi Kleen" <andi@...stfloor.org> Cc: "Martin K. Petersen" <martin.petersen@...cle.com>, djwong@...ibm.com, "Greg Freemyer" <greg.freemyer@...il.com>, "Andreas Dilger" <adilger.kernel@...ger.ca>, "Theodore Tso" <tytso@....edu>, "Sunil Mushran" <sunil.mushran@...cle.com>, "Amir Goldstein" <amir73il@...il.com>, "linux-kernel" <linux-kernel@...r.kernel.org>, "Mingming Cao" <cmm@...ibm.com>, "Joel Becker" <jlbec@...lplan.org>, "linux-fsdevel" <linux-fsdevel@...r.kernel.org>, linux-ext4@...r.kernel.org, "Coly Li" <colyli@...il.com> Subject: Re: [PATCH v1 00/16] ext4: Add metadata checksumming >>>>> "Andi" == Andi Kleen <andi@...stfloor.org> writes: >> On Westmere and beyond it is possible to accelerate generic CRC >> calculation using the PCLMULQDQ operation. There are many of our CRC Andi> Faster than the lookup table? That's hard to believe. Using PCLMULQDQ you can parallelize the calculation. You can even boost hw CRC32C performance that way. http://download.intel.com/design/intarch/papers/323405.pdf http://download.intel.com/design/intarch/papers/323102.pdf -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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