Re: Seeking a KVM benchmark

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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
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