2018-02-26 17:49 GMT+01:00 Marco Lorenzo Crociani < [email protected]>:
> Hi, > I can't access avx512* instruction set from virtual machines. > Added some relevant people. > 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: [email protected] > web: http://www.prismatelecomtesting.com > _______________________________________________ > Users mailing list > [email protected] > http://lists.ovirt.org/mailman/listinfo/users > -- SANDRO BONAZZOLA ASSOCIATE MANAGER, SOFTWARE ENGINEERING, EMEA ENG VIRTUALIZATION R&D Red Hat EMEA <https://www.redhat.com/> <https://red.ht/sig> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>
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