From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcus Granado Subject: Re: Virtualization of the CPU Performance Monitoring Unit Date: Tue, 10 Apr 2012 15:45:30 +0100 Message-ID: <4F84478A.5010701@citrix.com> References: <4F7F1D14.9040208@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Lin Ming Cc: mike McClurg , "wei.huang2@amd.com" , Konrad Rzeszutek Wilk , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org On 08/04/12 07:48, Lin Ming wrote: >> 2. The PMU project description in the wiki is vague. I know HVM guests >> support virtualized PMU. Please check vpmu.c files in /hvm, /svm, and /vmx >> directories. You better ask mentors for details (maybe this is XCP >> specific?). Yes, the description is vague, we should update the page. The idea was to enable users to run hardware profilers in dom0 and in any domU, PV or HVM. This would include implementing what is missing for dom0/PV domains, and to confirm in HVM domains that profilers such as oprofile, hwpmc, intel performance counter monitor at least are running without problems in the existing vPMU implementation. The original idea was to add support to XCP, but please feel free to add support to xen-unstable and the latest linux kernel; XCP will use those at some point. cheers, Marcus