[petsc-users] Bus Error

[Jed Brown]

Barry Smith <bsmith at petsc.dev> writes:

>   Some of the MKL versions of BLAS use the new Phi-like SIMD instructions that require 64 byte alignment but this probably does not apply to you.

They shouldn't ever require that the input array be aligned.  For large sizes, they'll always be packing tiles anyway, in which case MKL (or BLIS, etc) is responsible for alignment of the tiles.