From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Chen Subject: Clock running at double speed in guest Date: Fri, 26 Jan 2007 16:31:46 -0800 Message-ID: <1169857906.30807.52.camel@localhost.localdomain> Reply-To: tim.c.chen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org I notice that when I am testing kvm, the clock on guest is running at twice the speed. Same thing also happen using qemu without kvm. I look at my wall clock when I issue the command "time sleep 30". When the command returns and report 30 sec has elasped, I found that actually only 15 sec has passed on the wall clock. Perhaps somewhere an extra clock tick was counted. I am using 2.6.20-rc5 on host and 2.6.19 on guest. Test is done on a dual socket woodcrest machine. Tim ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV