From mboxrd@z Thu Jan 1 00:00:00 1970 From: "W. Michael Petullo" Subject: Questions about OProfile Date: Tue, 5 Apr 2011 12:03:10 -0500 Message-ID: <20110405170310.GA2801@imp.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org The Xenoprof page, http://xenoprof.sourceforge.net/, asks that OProfile-related questions be sent to the xen-devel mailing list. I am interested in passive domain profiling using OProfile. I have downloaded the 0.9.5 patch, modified it so it applies against 0.9.6 and built OProfile for Fedora [1]. I have not yet had success performing passive profiling of a DomU. I am using "Tutorial: Profiling in Xen" by J. Renato Santos and have some questions. First, what is the status of Xenoprof? The latest patch is against 0.9.5, but OProfile 0.9.6 is about 16 months old. Is Xenoprof actively maintained? Second, should I expect Xenoprof to work with Linux 2.6.38 and Xen 4.1? I have observed the following: No Xen: works fine. Xen Dom0: receive "error: no sample files found: profile specification too strict." Xen Dom0, module option timer=1: profiling Dom0 works fine but I don't see any statistics from DomU; I also see "/usr/bin/opcontrol: line 1430: /dev/oprofile/passive_domains: Permission denied" In fact, /dev/oprofile/passive_domains does not exist. Has the kernel dropped support for the passive profiling of domains? [1] https://bugzilla.redhat.com/show_bug.cgi?id=693596 -- Mike :wq