Re: [PATCH 4/5] KVM: Add hypercall queue for paravirt_ops implementation

Gregory Haskins
2007-06-18T13:25:37Z

On Mon, 2007-06-18 at 08:19 -0500, Anthony Liguori wrote:
> Gregory Haskins wrote:
> > On Mon, 2007-06-18 at 15:50 +0300, Avi Kivity wrote:
> >
> >
> >> These numbers are pretty bad. I'd like to improve them, even without PV.
> >>
> >>
> >
> > There's a 20% speedup just waiting to be checked in in the lapic
> > branch ;)
> >
> > (This gain was observed using "make mrproper; make defconfig; time make"
> > on Intel with a non-PV 2.6.21 guest when the lapic code was enabled).
> >
>
> So what was the final number you were seeing? Were you seeing only 25%
> below native to start with?

If memory serves me correctly, I was getting 9m30s pre-patch, and 7m55s
post-patch. This translates (I believe) to approximately 19.5%
improvement. I didn't measure against native.

-Greg