I'm looking for ways to speed up RAID calculations(e.g XOR for RAID5) plus offloading them from CPU as much as possible. During kernel boot up I noticed two outputs: crypto/xor.c: xor: measuring software checksum speed 8regs : 3379.000 MB/sec 8regs_prefetch: 2969.000 MB/sec 32regs : 3398.000 MB/sec 32regs_prefetch: 3054.000 MB/sec xor: using function: 32regs (3398.000 MB/sec) lib/raid6: raid6: altivecx1 1470 MB/s raid6: altivecx2 1820 MB/s raid6: altivecx4 2756 MB/s raid6: altivecx8 2874 MB/s raid6: int64x1 480 MB/s raid6: int64x2 832 MB/s raid6: int64x4 1221 MB/s raid6: int64x8 1160 MB/s raid6: using algorithm altivecx8 (2874 MB/s) raid6: using intx1 recovery algorithm However I'm unclear how the md drivers(especially RAID5, and/or RAID6) can benefit from these code, can I use them to accelerate RAID5/6's XOR with these code somehow? Thanks a lot, Xiao -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
