From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3 and Xen (suprisingly small\!). Date: Thu, 18 Oct 2012 19:02:02 +0100 Message-ID: <5080441A.4020907@citrix.com> References: <1350481786-4969-1-git-send-email-konrad.wilk@oracle.com> <507ED6C0.4020503@zytor.com> <20121017161036.GA10691@phenom.dumpdata.com> <507EE1C3.7070300@zytor.com> <20121017165452.GA22740@phenom.dumpdata.com> <50802EEC.6060102@citrix.com> <20121018174200.GA20508@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20121018174200.GA20508@localhost.localdomain> Sender: linux-acpi-owner@vger.kernel.org To: Konrad Rzeszutek Wilk Cc: Konrad Rzeszutek Wilk , "xen-devel@lists.xensource.com" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-acpi@vger.kernel.org" , "H. Peter Anvin" , "lenb@kernel.org" List-Id: xen-devel@lists.xenproject.org On 18/10/12 18:42, Konrad Rzeszutek Wilk wrote: >> 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? Not right now, no. But I don't so why it couldn't be possible. David