From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:41768) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TjAfZ-0002ns-ES for qemu-devel@nongnu.org; Thu, 13 Dec 2012 10:26:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TjAfV-0001Wa-Mf for qemu-devel@nongnu.org; Thu, 13 Dec 2012 10:25:53 -0500 Received: from [220.181.15.55] (port=35027 helo=m15-55.126.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TjAfU-0001T2-MV for qemu-devel@nongnu.org; Thu, 13 Dec 2012 10:25:49 -0500 Date: Thu, 13 Dec 2012 23:25:34 +0800 (CST) From: luo_brian In-Reply-To: <50C84060.1090105@redhat.com> References: <3e1838e9.148d6.13b8b801db6.Coremail.luo_brian@126.com> <50C7B64B.1010301@redhat.com> <50C84060.1090105@redhat.com> Content-Type: multipart/alternative; boundary="----=_Part_331752_1240121785.1355412334395" MIME-Version: 1.0 Message-ID: <504357e5.15c92.13b94dee73b.Coremail.luo_brian@126.com> Subject: Re: [Qemu-devel] Performance of usb tablet over ehci List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: Hans de Goede , qemu-devel@nongnu.org ------=_Part_331752_1240121785.1355412334395 Content-Type: text/plain; charset=GBK Content-Transfer-Encoding: 7bit I was using win7 32bit, and configured usb controller nec-xhci as well as usb tablet emulation. But it didn't work. Seems usb tablet failed to connect to xhci controller. 57 58 59
60 At 2012-12-12 16:29:20,"Gerd Hoffmann" wrote: > Hi, > >> In the end the problem stays that usb uses a polling model versus the >> async interrupt model ps2 uses. > >If your guest supports usb 3.0 (aka xhci) you can try that. The >hardware design allows to not poll in the emulation, which brings down >the cpu load even more, should come pretty close to ps/2 mouse levels. > >cheers, > Gerd ------=_Part_331752_1240121785.1355412334395 Content-Type: text/html; charset=GBK Content-Transfer-Encoding: 7bit
I was using win7 32bit, and configured usb controller nec-xhci as well as usb tablet emulation. But it didn't work. Seems usb tablet failed to connect to xhci controller.

57 <controller type='usb' index='0' model='nec-xhci'/>
58 <input type='tablet' bus='usb'>
59 <address type='usb' bus='0' port='1'/>
60 </input>

At 2012-12-12 16:29:20,"Gerd Hoffmann" <kraxel@redhat.com> wrote: >  Hi, > >> In the end the problem stays that usb uses a polling model versus the >> async interrupt model ps2 uses. > >If your guest supports usb 3.0 (aka xhci) you can try that.  The >hardware design allows to not poll in the emulation, which brings down >the cpu load even more, should come pretty close to ps/2 mouse levels. > >cheers, >  Gerd


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