On Wed, Jan 5, 2022 at 8:39 AM Dirk Müller <dmueller@xxxxxxx> wrote:
>
> In commit fe5cbc6e06c7 ("md/raid6 algorithms: delta syndrome functions")
> a xor_syndrome() benchmarking was added also to the raid6_choose_gen()
> function. However, the results of that benchmarking were intentionally
> discarded and did not influence the choice. It picked the
> xor_syndrome() variant related to the best performing gen_syndrome().
>
> Reduce runtime of raid6_choose_gen() without modifying its outcome by
> only benchmarking the xor_syndrome() of the best gen_syndrome() variant.
>
> For a HZ=250 x86_64 system with avx2 and without avx512 this removes
> 5 out of 6 xor() benchmarks, saving 340ms of raid6 initialization time.
>
> Signed-off-by: Dirk Müller <dmueller@xxxxxxx>
Applied both patches to md-next.
Thanks,
Song
