Don't laugh - just a stupid question:

 

Why shows a passed thru CPU core within a VM less Ghz than the host CPU? Is it because of the emulation? And if yes, is there a way to make a passed thru CPU faster?

 

The host:

 

The client:

 

 

Edited April 3, 20215 yr by hawihoney

1 hour ago, hawihoney said:

Why shows a passed thru CPU core within a VM less Ghz than the host CPU?

Which cpu? How is the cpu setup in libvirt? Can you post the xml?

The host is 2x 2680v2. The VM has 4x cores passed through. The host reports 2,8 GHz and the VM reports 2 GHz.

 

Here we go: 

 

TowerVM01.xml

Found it. It's the Unraid GUI that shows wrong values.

 

Output of cpuinfo within VM. Same VM is reported in Unraid GUI as 2 Ghz (see original post):

 

model name      : Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
cpu MHz         : 2799.999

 

Edited April 3, 20215 yr by hawihoney