Messages in this thread |  | | | Subject | Re: [PATCH v1 00/16] ext4: Add metadata checksumming | | From | "Martin K. Petersen" <> | | Date | Sun, 04 Sep 2011 13:17:27 -0400 |
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>>>>> "Andi" == Andi Kleen <andi@firstfloor.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
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