On Wed, 2013-05-01 at 12:52 -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. > Herbert, Any feedback on this updated patchset? Thanks. Tim -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
