@Abhilash you can also try to set
export OPENBLAS_CORETYPE=SKYLAKEX
before starting Julia to force using the SkylakeX kernel, that’s what OpenBLAS uses anyway:
https://github.com/xianyi/OpenBLAS/blob/5e9a91259158aaccb70343f398df7394f12c6222/cpuid_x86.c#L1463-L1467
It just doesn’t detect it automatically in OpenBLAS 0.3.13.
I seem to remember there was an environment variable to show what target OpenBLAS chooses dynamically (I guess in your case it’s falling back to the generic x86_64 kernels), but I can’t find it in the documentation (nor grepping getenv in the source code of OpenBLAS, so maybe I dreamed it).