From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: windows 2003 smp guest Date: Tue, 18 Sep 2007 16:42:27 +0200 Message-ID: <46EFE3D3.2000303@qumranet.com> References: <46EFDB2C.30601@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel To: Haydn Solomon 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 Haydn Solomon wrote: > > > On 9/18/07, *Avi Kivity* > > wrote: > > > > It's working will with -no-kvm-irqchip. Not so sure without the > switch, > but we're improving things. > > I haven't tested performance very thoroughly. What's your workload? > > > My workload medium to high. Running full cisco labs using cisco emulator. Well, no idea what that is. > > > > Good question. What HALs are available for Windows 2003 SMP? > > > The following are available... > > acpi multiprocessor pc > acpi uniprocessor pc > acpi pc > mps uniprocessor pc > mps multiprocessor pc > standard pc > other > > mps multiprocessor may give the best performance, though I've never tested it. > -- > error compiling committee.c: too many arguments to function > > > > One other question. I'm doing this a core 2 duo and am wondering about > number vcpu. I know xen for example can have more vcpus than physical > cpus, example 4 vcpus on 2 physical cpus/cores. What is the > recommendation for best performance? I would imagine a one to one ie. > 2 vcpus on 2 cores/cpus? > > Yes, 1:1 (or less) is best. Overcommitting cpus will definitely degrade performance drastically. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/