From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=59956 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OMfNh-0000X2-2m for qemu-devel@nongnu.org; Thu, 10 Jun 2010 06:53:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OMfNf-0006Wl-RL for qemu-devel@nongnu.org; Thu, 10 Jun 2010 06:53:04 -0400 Received: from zion.dlh.net ([91.198.192.1]:44137 helo=mail.dlh.net) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OMfNf-0006WT-MS for qemu-devel@nongnu.org; Thu, 10 Jun 2010 06:53:03 -0400 Message-ID: <4C10BFD5.8030808@dlh.net> Date: Thu, 10 Jun 2010 12:35:01 +0200 From: Peter Lieven MIME-Version: 1.0 Subject: Re: [Qemu-devel] Disable PS/2 mouse References: <4C0E3C75.7070209@dlh.net> <4C0F5082.2080403@dlh.net> <4C0F727B.5010302@redhat.com> <4C0F9B46.5080602@dlh.net> <4C0FA6C9.4070902@redhat.com> <4C109048.9060007@redhat.com> <4C10952B.6090202@redhat.com> In-Reply-To: <4C10952B.6090202@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: dlaor@redhat.com, Markus Armbruster , qemu-devel@nongnu.org Gerd Hoffmann wrote: > On 06/10/2010 09:12 AM, Dor Laor wrote: >> On 06/09/2010 05:35 PM, Gerd Hoffmann wrote: >>> Hi, >>> >>>> with 0.12.4 it is still the case that a total idle vm takes about 6-8% >>>> of a 2.4GHz Xeon Core. >>> >>> I see that order of magitude too, no matter whenever usb is on or off. >>> With older qemu and usbtablet it used to be up to 25%. >> >> Is it possible to dynamically control the refresh internally within qemu >> so VMs without a connected VNC client will have rare refreshes or no >> refresh at all? I hope it's not the OS who polls it. > > vnc/vga or usb tablet? > > For the vga it happens already, with no vnc client connected vnc zaps > the refresh timer and stops calling vga_hw_update(), thus vga stops > doing framebuffer dirty tracking too. > > For usb hid devices: No idea how they work and whenever we can put > them into sleep somehow (with/without guest cooperation). is it the emulated bus or the tablet device that is generating the load? > > cheers, > Gerd > >