Re: [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load.

[Paul Brook]

> > A guest that counts on having enough CPU for something is
> > timing-depenent (buggy).
>
> Tell this to RT developers who count each CPU cycle.

If you want any a realtime illusion you absolutely have to be using -icount. 
This is still a long way from being cycle accurate and is no use for 
benchmarking, but it does give some semblance of realistic virtual realtime 
behavior. Of course this is at the expense of some divergence between host 
and virtual time.

Paul