From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guillaume Rousse Subject: comprehensive documentation of clock-related options for HVM guests Date: Mon, 16 Feb 2009 11:39:31 +0100 Message-ID: <49994263.5080507@inria.fr> 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-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org Hello list. Despite using ntp, we're facing heavy clock skews on our HVM guests, which happen to be almost all x86_64 linux. I've been browsing the list archive, I found reference to two different xen guest configuration options: - timer_mode - hpet However, I couldn't find neither reference documentation, neither on their default values. According to this tread, the default for timer_mode was changed in some part of the source tree from 0 to 1: http://lists.xensource.com/archives/html/xen-devel/2008-10/msg00261.html But according to this one, there was a discussion for changing timer_mode from 0 to 2, and hpet from 0 to 1: http://lists.xensource.com/archives/html/xen-devel/2008-06/msg00095.html And according to XendConfig.py code (3.3.1), the default value for both of them is actually 0... This is a bit confusing :( -- BOFH excuse #243: The computer fleetly, mouse and all.