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How to tell a CPU model, When Running Under a Hypervisor that Hides a Real CPUID

When running in a virtual machine, you may never be sure which physical CPU you are running on - hypervisor can pass anything as CPUID to guests. For best performance, it helps to use the best instruction set supported by a physical CPU - be it AVX512, AVX2, AVX, SSE4.1, AES-NI, or other accelerated instruction sets. Enhanced Platform Awareness features use top-down approach to close this gap,...
Authored by alexander-komarov (Intel) Last updated on 07/12/2019 - 15:30