On 27/02/2018 09:37, Sandro Bonazzola wrote:
Virtual Machine settings A) VM: Custom CPU Type: Use cluster default(Intel Skylake Family) General Tab shows: Guest CPU Type: Skylake-Client
avx512: NO
B) VM: Custom CPU Type: Skylake-Client General Tab shows: Guest CPU Type: Skylake-Client
avx512: NO
C) VM: Custom CPU Type: Use cluster default(Intel Skylake Family) [grey - cannot modify] Migration mode: Do not allow migration Pass-Through Host CPU General Tab shows: Guest CPU Type: Skylake-Client
avx512: YES ( cat /proc/cpuinfo |grep avx512: avx512f avx512dq avx512cd avx512bw avx512vl )
Using pass-through host cpu (disabling vm migration) is the only way to access avx512 in a VM, is it a bug or am I missing something?
Skylake-Client does _not_ have AVX512 (I tried now on a Kaby Lake Core i7 laptop). Only Skylake-Server has it and it will be in RHEL 7.5. Thanks, Paolo