On 2/25/20 7:35 PM, Robert Hoo wrote:
> @@ -226,10 +263,16 @@ static void init_accel(unsigned cache)
> fn = buffer_zero_avx2;
> }
> #endif
> +#ifdef CONFIG_AVX512F_OPT
> +if (cache & CACHE_AVX512F) {
> +fn = buffer_zero_avx512;
> +length_to_accel = 256;
> +}
>
Intialize buffer_accel with this buffer_zero_avx512(), when Intel AVX512F is
available on host.
This function utilizes Intel AVX512 fundamental instructions which
is faster than its implementation with AVX2 (in my unit test, with
4K buffer, on CascadeLake SP, ~36% faster, buffer_zero_avx512() V.S.
