KVM vs bare metal performance difference

B

bogesman

Renowned Member
Aug 7, 2015
13
2
68
What is the expected difference in percents between windows guest allocated with all host resources and the same server?
According to these tests https://major.io/2014/06/22/performance-benchmarks-kvm-vs-xen/ it's very little, but that's for a linux guest.
I'm testing on 2 socket numa enabled MB and i see CPU performance loss of around 40%.
Tested so far WIN7 with virtio network and hdd. Ballooning and fixed memory allocation no difference.
 
I do one simple test, because all i care is CPU performance and that is maxon cinebench.
So if I bench for 14 points in the same server with windows as host, in kvm i get around 8 points.

MB is Asus Z9NA-D6 with 2XCPU - Xeon E5-2450
 
So can can at least somebody tell me what is it the expected CPU performance if windows is guest ?
-5 -10 or -40%. I'm having hard time finding some conclusive test or at least simple statement.
 
You must log in or register to reply here.
Top Bottom