Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932715Ab2JRSCJ (ORCPT ); Thu, 18 Oct 2012 14:02:09 -0400 Received: from smtp.citrix.com ([66.165.176.89]:23924 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932179Ab2JRSCH (ORCPT ); Thu, 18 Oct 2012 14:02:07 -0400 X-IronPort-AV: E=Sophos;i="4.80,608,1344211200"; d="scan'208";a="41718371" Message-ID: <5080441A.4020907@citrix.com> Date: Thu, 18 Oct 2012 19:02:02 +0100 From: David Vrabel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20120428 Iceowl/1.0b1 Icedove/3.0.11 MIME-Version: 1.0 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" Subject: Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPI S3 and Xen (suprisingly small\!). 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> In-Reply-To: <20121018174200.GA20508@localhost.localdomain> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 688 Lines: 17 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/