Re: [Qemu-devel] KVM guest cpu L3 cache and cpufreq

[Gleb Natapov]

On Tue, Aug 27, 2013 at 03:35:33PM +0200, Benoît Canet wrote:
> > > > If I understand correctly changing the CPUID L3 cache infos in QEMU 
> > > > will change
> > > > the value displayed in the guest /proc/cpuinfo but will not change the 
> > > > size of
> > > > the l3 cache used by the hardware. So I am chasing a cosmetic bug.
> > > > If it right ?
> > > > 
> > > Right.
> > > 
> > Well, actually not entirely. An application can query cache sizes and
> > adjust its algorithms accordingly in which case performance can be
> > suboptimal if information in a guest is not accurate.
> 
> So maybe what is missing is a CPUID passthrough mode triggered when -cpu host
> is used ?
> 
That is missing too, but it should not be default with other CPU models.

--
                        Gleb.