From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: Re: kvm-27 vs 28 I/O speed Date: Mon, 16 Jul 2007 12:49:14 -0700 Message-ID: <1184615354.6454.48.camel@localhost> References: <1183748857.10287.198.camel@localhost> <1184180092.26210.49.camel@localhost> <4695BE06.6060609@qumranet.com> <1184263854.26210.89.camel@localhost> <46976EA7.2020202@qumranet.com> <68676e00707130627p32a43a63l3c6fe647242ec3e@mail.gmail.com> <46978110.5090303@qumranet.com> <1184351486.26210.101.camel@localhost> <68676e00707151227hb8b8538j706d9d0ee765ed41@mail.gmail.com> <68676e00707151407j1cf758e0ya7032c8c8577b982@mail.gmail.com> <68676e00707151422n2e1f0a07kc4ec10797edfa40c@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel To: Luca Return-path: In-Reply-To: <68676e00707151422n2e1f0a07kc4ec10797edfa40c-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 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 On Sun, 2007-07-15 at 23:22 +0200, Luca wrote: > Can you re-test KVM 27 with it's BIOS (i.e. use something like -L > ~/src/kvm-27/qemu/pc-bios)? Doing that does appear to make it behave like kvm-28. DMA enabled, and slow I/O: qemu:~# hdparm -v /dev/hda /dev/hda: multcount = 16 (on) IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 10402/255/63, sectors = 10485760, start = 0 -- Dave ------------------------------------------------------------------------- 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/