The AVX XOR performance reported during boot seems wrong. raid6: using algorithm sse2x4 (10035 MB/s) xor: automatically using best checksumming function: avx : 3468.000 MB/sec I would expect the value to be well north of 10000MB/s. I do not get a generic_sse performance number which I do on other non-AVX hosts. The system is a dual AMD Opteron 6378 (16 core, 2.4GHz, piledriver). The kernel is 3.11.8-200.fc19.x86_64. I did read that AMD's AVX-256 implementation performs poorly compared to AVX-128. Perhaps there are other AMD specific "optimizations" that need to be considered. Is there any standalone code I ran run to benchmark the various XOR implementations? --Larkin -- 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
