From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1FICWX-0006f6-Hj for qemu-devel@nongnu.org; Sat, 11 Mar 2006 17:25:21 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1FICWV-0006dh-JK for qemu-devel@nongnu.org; Sat, 11 Mar 2006 17:25:20 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1FICWV-0006dS-Fg for qemu-devel@nongnu.org; Sat, 11 Mar 2006 17:25:19 -0500 Received: from [65.74.133.6] (helo=mail.codesourcery.com) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1FICa7-0005xw-3C for qemu-devel@nongnu.org; Sat, 11 Mar 2006 17:29:03 -0500 From: Paul Brook Subject: Re: [Qemu-devel] qemu (cvs-version) performance? Date: Sat, 11 Mar 2006 22:25:15 +0000 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200603112225.16535.paul@codesourcery.com> 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 Cc: Sven =?iso-8859-15?q?K=F6hler?= > I thought, that qemu-0.8.0's problem would be disk-IO. I installed > Windows 2000 and in the task-manager the CPU-Time is 100% during intense > IO. A "dir c:\ /A /S /B >NUL:" on the console causes 100% CPU-time and > most of it being that red-colored "in-kernel-time". Qemu host IO is syncrhonous. ie. the guest is paused on the instruction that issues the IO until the IO completes. As for as the guest is concerned it happens instantly. This is all your test shows. Paul