Re: [Qemu-devel] Re: qemu-kvm faster than qemu?

[Gleb Natapov]

On Thu, Aug 26, 2010 at 07:54:26AM -0500, Anthony Liguori wrote:
> On 08/26/2010 02:59 AM, Gleb Natapov wrote:
> >On Thu, Aug 26, 2010 at 09:53:27AM +0200, Gerd Hoffmann wrote:
> >>   Hi,
> >>
> >>>Also try qemu-kvm with -no-kvm-irqchip. I can't believe an in-kernel
> >>>lapic would make this much of a difference with windows 7 but it's worth
> >>>trying.
> >>Didn't try win7, but for winxp it is a *huge* difference.
> >>
> >On which HW? My guess is this is because of tpr patching.
> 
> Does Windows 7 hit the TPR heavily?  I thought all modern versions
> of Windows significantly reduced their interactions with the TPR.
> 
Windows 7 doesn't. tpr patching explains only winxp slowdown.
--
                        Gleb.