Re: [Fedora-xen] Xen/Linux 3.4.2 performance

[W. Michael Petullo]

> > We have seen a significant reduction in performance in our research DomU
> > OS kernel when running on Fedora 16 with Linux 3.4.2 vs. 3.3.7. We run
>
> a series of benchmarks which are DomU-kernel-space-CPU-heavy; many of
> > these run 10x slower when using the 3.4.2 Linux kernel as Dom0.
> >
> > This is a little surprising---we've been tracking the Fedora kernels for
> > a long time with no problem like this. Did anyone else notice any changes?
>
> Just to verify.. both the 3.3.7 and 3.4.2 Linux kernel are 'release' builds? 
> and not debug-versions from rawhide?

Yes, they are the Fedora 16 release builds.