[ovirt-users] Q: Core Reservation on Hyperthreaded CPU

[Andrei V]

Hi,


I’m currently running node on HP ProLiant with 2 x Xeon with 4 core each.
Because of hyperthreading each physical core is being seen as 2.
How KVM/oVirt reserves cores if for example I allocate 4 CPU cores for VM ?
Does it allocates 4 real CPU cores, or 2 cores with 2 threads each ?

Each VM consumes very low CPU resources.
What happens if # of used cores consumed by VMs will exceed real count of physical CPU cores ?

Thanks.
Andrei