From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hui Kang Subject: DVFS, xenpm in 3.4.1 and linux 2.6.18 Date: Fri, 11 Sep 2009 15:47:35 -0400 Message-ID: <4AAAA957.8060403@cs.sunysb.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: 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-users@lists.xensource.com, Xen-devel List-Id: xen-devel@lists.xenproject.org Hi, All, I have some problem of using dvfs in Xen 3.4.1 and 2.6.18 kernel. I enabled Speed option in BIOS and add "cpufreq=xen" in the grub file. But when I entered my dom0 and type "xenpm get-cpufreq-XXX" (any xenpm argument), it returns "[CPU0] failed to get CPU P state". I am wondering if I should enable some feature of 2.6.18 during the kernel configuration. Does anyone have any solution to this? Thanks. - Hui