Re: Performance considerations related to Intel Meltdown on KVM CPU types

2018-01-08 Thread ilya musayev
Thanks for sharing On Mon, Jan 8, 2018 at 7:11 AM Nux! wrote: > Hello, > > Just stumbled upon this > https://twitter.com/berrange/status/950209752486817792 > > "ensure KVM guest CPU model you choose has the "pcid" feature, otherwise > guests will suffer terrible performance from the Meltdown fix

Re: Performance considerations related to Intel Meltdown on KVM CPU types

2018-01-08 Thread Pierre-Luc Dion
Thanks for sharing this Nux! PL On Mon, Jan 8, 2018 at 10:11 AM, Nux! wrote: > Hello, > > Just stumbled upon this > https://twitter.com/berrange/status/950209752486817792 > > "ensure KVM guest CPU model you choose has the "pcid" feature, otherwise > guests will suffer terrible performance from

Performance considerations related to Intel Meltdown on KVM CPU types

2018-01-08 Thread Nux!
Hello, Just stumbled upon this https://twitter.com/berrange/status/950209752486817792 "ensure KVM guest CPU model you choose has the "pcid" feature, otherwise guests will suffer terrible performance from the Meltdown fixes. This means using a named Haswell, Broadwell or Skylake based model or h