From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: VM entry/exit time Date: Tue, 01 May 2007 17:00:35 +0300 Message-ID: <46374803.4040105@qumranet.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Omar Khan Return-path: In-Reply-To: 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 Omar Khan wrote: > hi, > > I am measuring the VM enty/exit time on the following two machines by > recording the time it takes to make n number of vmcalls : > > 1. Lenovo Think Centre, Intel Pentium D, 2 Cores, 3GHz with 3G of memory > 2. Dell Inspiron 6400 , Intel Core Duo, 2 Cores, 2 GHz with 1G of memory > > Surprisingly it takes almost 3 times longer on the Lenovo to make a vmcall. > Anyone have any idea what might be causing this? Running kvm on suse10.2 on both > the systems. > > It's not surprising at all. VT is improving at a rapid pace. I suspect that on a Core 2 you will see faster speeds, and more improvements are promised with newer processors. Note that recent kvm versions have improved vmexit latency independently of the processor, and this is continuing too. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/