From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: [PATCH 0/2] Batch writes to MMIO Date: Wed, 23 Apr 2008 10:10:38 -0500 Message-ID: <480F516E.3030407@codemonkey.ws> References: <12089560583282-git-send-email-Laurent.Vivier@bull.net> <480F4237.90202@qumranet.com> <1208960577.4281.17.camel@frecb07144> <480F4A4E.7010008@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel@lists.sourceforge.net, Laurent Vivier To: Avi Kivity Return-path: In-Reply-To: <480F4A4E.7010008@qumranet.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Avi Kivity wrote: > Laurent Vivier wrote: > > That's the lovely animation. You can time XP startup, or look at system > time in 'top' once it stabilizes. Also compare total host_state_reloads > to boot in kvm_stat (each costs 5 usec, after discount). > Win2k's boot up animation (the moving bar) is done in VGA planar mode. You should be able to time the difference in startup. >> and by group of 10 with XP >> when we move a window. >> >> > > That's probably programming the cirrus blitter, also a candidate for > batching, but probably not measurable. Maybe one of those Windows > graphics benchmarks which draw tons of rectangles very fast and cause > epilepsy seizures. > > I guess most interesting is e1000, if we need to do more than one mmio > to start transmitting. > The ne2k is pretty mmio heavy. You should be able to observe a boost with something like iperf (guest=>host) I would think if this is a real savings. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone