The elephant in the room is the classic CPU architecture mistake where you use two different instruction sets on your performance and efficiency cores. There is

The elephant in the room is the classic CPU architecture mistake where you use two different instruction sets on your performance and efficiency cores. There is no way to prevent code with AVX-512 instructions from being executed on an unsupported core. This exact same problem that plagued early ARM big.LITTLE designs that used ARMv8.2 on the performance core but ARM8.0 on the efficiency core, forcing all code to use the more restrictive instruction set and cripple the performance benefits of the “big” cores.