Re: [ANNOUNCE] kvm-49 release

Sheng Yang
2007-11-02T04:57:50Z

On Friday 02 November 2007 12:56:26 Haydn Solomon wrote:
> On Nov 1, 2007 11:15 PM, Sheng Yang <sheng.yang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:
> > On Friday 02 November 2007 10:14:35 Haydn Solomon wrote:
> > > On Nov 1, 2007 9:54 PM, Haydn Solomon <haydn.solomon-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > On Nov 1, 2007 9:36 PM, Sheng Yang <sheng.yang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:
> > > > > On Friday 02 November 2007 09:10:31 Haydn Solomon wrote:
> > > > > > How can I tell that my cpu has flexpriority?
> > > > > >
> > > > > > (Resending this as didn't cc list last time.)
> > > > >
> > > > > Oops, forgot the patch...
> > > >
> > > > Thanks Sheng.
> > > >
> > > > Luckily for me I've got the Flexpriority feature
> > > >
> > > > [root@localhost winxptest]# dmesg | grep lex
> > > > kvm: FlexPriority enabled!
> > > >
> > > > One thing I do notice apart from noticeably very good responsiveness
> >
> > and
> >
> > > > performance on windows guest ( xp sp2 ) is that this is the lowest
> > > > cpu usage I've seen on the qemu kvm process to date. I haven't tried
> > > > smp
> >
> > yet
> >
> > > > but that will be my next test and will report on how that goes.
> > > > Thanks guys and well done!
> > >
> > > One issue I do see. When I run my windows xp guest which is ACPI
> > > Multiprocessor PC HAL with -smp 2, it runs much slower and cpu usage is
> > > high.
> >
> > Please try the attach patch.
>
> Oh yeah... this is much much better. Windows seems to performing extremely
> fast and cpu usage is very low using -smp 2 after applying this patch.
> Thank you.
>

My pleasure. :)

I will send this patch out.

--
Thanks
Yang, Sheng