From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Harper Subject: Re: Windows Server 2008 VM performance Date: Tue, 2 Jun 2009 17:15:55 -0500 Message-ID: <20090602221555.GT6411@us.ibm.com> References: <4A25942B.7010503@linux.vnet.ibm.com> <4A259BE8.4080403@redhat.com> <90eb1dc70906021445o13f63beeucc05776e82c7c3c9@mail.gmail.com> <4A259E3B.6020408@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Javier Guerra , Andrew Theurer , KVM list To: Avi Kivity Return-path: Received: from e36.co.us.ibm.com ([32.97.110.154]:36475 "EHLO e36.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751347AbZFBWP6 (ORCPT ); Tue, 2 Jun 2009 18:15:58 -0400 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e36.co.us.ibm.com (8.13.1/8.13.1) with ESMTP id n52MEdPZ007211 for ; Tue, 2 Jun 2009 16:14:39 -0600 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n52MFxnp116930 for ; Tue, 2 Jun 2009 16:15:59 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n52MFuIi014999 for ; Tue, 2 Jun 2009 16:15:58 -0600 Content-Disposition: inline In-Reply-To: <4A259E3B.6020408@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: * Avi Kivity [2009-06-02 16:49]: > Javier Guerra wrote: > >On Tue, Jun 2, 2009 at 4:38 PM, Avi Kivity wrote: > > > >>Andrew Theurer wrote: > >> > >>>P.S. Here is the qemu cmd line for the windows VMs: > >>>/usr/local/bin/qemu-system-x86_64 -name newcastle-xdbt01 -hda > >>>/dev/disk/by-id/scsi-3600a0b80000f1eb10000074f4a02b08a > >>> > >>Use: -drive /dev/very-long-name,cache=none instead of -hda to disable the > >>host cache. Won't make much of a differnence for 5 MB/s though. > >> > > > >would emulating SCSI instead of IDE help while we hope and wait for > >virtio_block drivers? (and better virtio_net). > > > > I don't think the scsi emulation currently supports command parallelism, > but I could be wrong. > For reads only, and I don't think 2k8 installs to lsi scsi acutally complete. -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ryanh@us.ibm.com