From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1F7JrP-0004mU-37 for qemu-devel@nongnu.org; Thu, 09 Feb 2006 17:01:55 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1F7JrL-0004ku-Tf for qemu-devel@nongnu.org; Thu, 09 Feb 2006 17:01:53 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1F7JrK-0004kR-3j for qemu-devel@nongnu.org; Thu, 09 Feb 2006 17:01:51 -0500 Received: from [32.97.110.153] (helo=e35.co.us.ibm.com) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1F7Jux-0002Kx-1q for qemu-devel@nongnu.org; Thu, 09 Feb 2006 17:05:35 -0500 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e35.co.us.ibm.com (8.12.11/8.12.11) with ESMTP id k19M1mQm025792 for ; Thu, 9 Feb 2006 17:01:48 -0500 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay04.boulder.ibm.com (8.12.10/NCO/VERS6.8) with ESMTP id k19M4GWW186002 for ; Thu, 9 Feb 2006 15:04:16 -0700 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id k19M1mDc011015 for ; Thu, 9 Feb 2006 15:01:48 -0700 Message-ID: <43EBBBBE.3070604@us.ibm.com> Date: Thu, 09 Feb 2006 16:01:34 -0600 From: Anthony Liguori MIME-Version: 1.0 Subject: Re: [Qemu-devel] -kernel-kqemu References: <20060208230434.GA28760@jbrown.mylinuxbox.org> <20060209012752.GA30423@jbrown.mylinuxbox.org> <41e41e7a0602090046p18e89050m79c914f5293b2ade@mail.gmail.com> <20060209180531.GA13429@jbrown.mylinuxbox.org> In-Reply-To: <20060209180531.GA13429@jbrown.mylinuxbox.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Jim C. Brown wrote: > -kernel-kqemu virtualizes ring 0 code. > > So it basically makes qemu do what VMware does. > > IIRC someone reported a 33% speedup with the new option. > That was me. That was a 33% speedup on win2k startup time. kqemu (user only) has a negligible impact on win2k startup time which suggests this is mostly ring 0 code running which would make it a good benchmark for kernel-kqemu performance. This was a terribly unscientific benchmarking so don't read too much into it. Regards, Anthony Liguori