Re: High vm-exit latencies during kvm boot-up/shutdown

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Dong, Eddie wrote:
> Jan Kiszka wrote:
>   
>> So if you want the higher performance of PCIe you need
>> performance-killing wbindv (not to speak of latency)? That sounds a
>> bit contradictory to me. So this is also true for native PCIe usage?
>>
>>     
>
> Mmm, I won't say so. When you want to get RT performance, you
> won't use unknown OS such as Windows. If you use your RT
> linux, the OS (guest) itself should not use wbinvd.
>
>   

Well, virtualization lets you use an unknown OS without fear of 
compromising host security, so a real-time capable hypervisor (which kvm 
is, or very nearly) should be able to let you use an unknown OS without 
fear of compromising real-time response times.  Right now the only 
unresolvable issue I see is wbinvd.

-- 
error compiling committee.c: too many arguments to function


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