linux-kernel - Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3 and Xen (suprisingly small\!).

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Message-ID: <20121018174200.GA20508@localhost.localdomain>
Date:	Thu, 18 Oct 2012 13:42:03 -0400
From:	Konrad Rzeszutek Wilk <konrad@...nel.org>
To:	David Vrabel <david.vrabel@...rix.com>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	xen-devel@...ts.xensource.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>, lenb@...nel.org
Subject: Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3
 and Xen (suprisingly small\!).

> 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?
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