Messages in this thread | | | Date | Tue, 14 May 2013 10:35:26 +0800 | From | Herbert Xu <> | Subject | Re: [PATCH v3 0/4] Patchset to use PCLMULQDQ to accelerate CRC-T10DIF checksum computation |
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On Wed, May 01, 2013 at 12:52:47PM -0700, Tim Chen wrote: > Currently the CRC-T10DIF checksum is computed using a generic table lookup > algorithm. By switching the checksum to PCLMULQDQ based computation, > we can speedup the computation by 8x for checksumming 512 bytes and > even more for larger buffer size. This will improve performance of SCSI > drivers turning on the CRC-T10IDF checksum. In our SSD based experiments, > we have seen increase disk throughput by 3.5x with T10DIF for 512 byte > block size. > > This patch set provides the x86_64 routine using PCLMULQDQ instruction > and switches the crc_t10dif library function to use the faster PCLMULQDQ > based routine when available. > > Tim > > v3 > 1. Update the crct10dif crypto transform used in the crct10dif library in a safe way. > 2. Load the accelerated t10dif transform for the x86_64 cpus that support it. > 3. Added generic crct10dif crypto transform.
All applied. Thanks Tim. -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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