> > Hi Pasi, > > > > Do you know if ubuntu 12.04 has these optimized drivers or not? > > > > I think Canonical developers are going to add the drivers later > in some update to Ubuntu 12.04 packages. The drivers are not yet in 12.04. > > I saw some discussion from Canonical guys on xen-devel about that.
For the record, here is a benchmark from the XEN guys about this problem [1], the patchset [2], and the Ubuntu Bug Report [3] requesting a backport to current Ubuntu 12.04. [1] http://blog.xen.org/index.php/2011/11/29/baremetal-vs-xen-vs-kvm-redux/ [2] http://git.kernel.org/?p=linux/kernel/git/konrad/xen.git;a=shortlog;h=refs/heads/devel/acpi-cpufreq.v4 [3] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898112
