From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad@kernel.org>
Subject: Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3
 and Xen (suprisingly small\!).
Date: Thu, 18 Oct 2012 13:42:03 -0400
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> As for 'perf', since Xen already provides a virtual PMU for HVM guests
> It's not clear why we would spend the effort to implement another
> mechanism for PV guests (instead of using the virtual PMU from a PVH guest).

Would that allow one to evaluate the performance/bottlenecks that the
hypervisor might have?