Re: Seeking a KVM benchmark

Paolo Bonzini
2014-11-17T11:18:21Z

On 17/11/2014 12:17, Wanpeng Li wrote:
>>
>>> It's not surprising [1]. Since the meaning of some PTE bits change [2],
>>> the TLB has to be flushed. In VMX we have VPIDs, so we only need to flush
>>> if EFER changed between two invocations of the same VPID, which isn't
>>> the case.
>
> If there need a TLB flush if guest is UP?

The wrmsr is in the host, and the TLB flush is done in the processor
microcode.

Paolo