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

[Benoît Canet]

> > > 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 ?

Best regards

Benoît