Hi,
I can't access avx512* instruction set from virtual machines.
I have made a one server compute cluster to test new hardware:
oVirt 4.1.9
CentOS 7
Cluster CPU Type: Intel Skylake Family
Compatibility Version: 4.1
HOST:
CPU Model Name:Intel(R) Xeon(R) Platinum 8180 CPU @ 2.50GHz
Family: Family
CPU Type: Intel Skylake Family
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?
Regards,
--
Marco Crociani
Prisma Telecom Testing S.r.l.
via Petrocchi, 4 20127 MILANO ITALY
Phone: +39 02 26113507
Fax: +39 02 26113597
e-mail: mar...@prismatelecomtesting.com
web: http://www.prismatelecomtesting.com
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