From: luo_brian <luo_brian@126.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Hans de Goede <hdegoede@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Performance of usb tablet over ehci
Date: Thu, 13 Dec 2012 23:25:34 +0800 (CST) [thread overview]
Message-ID: <504357e5.15c92.13b94dee73b.Coremail.luo_brian@126.com> (raw)
In-Reply-To: <50C84060.1090105@redhat.com>
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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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next prev parent reply other threads:[~2012-12-13 15:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-11 19:45 [Qemu-devel] Performance of usb tablet over ehci luo_brian
2012-12-11 22:40 ` Hans de Goede
2012-12-12 8:29 ` Gerd Hoffmann
2012-12-13 15:25 ` luo_brian [this message]
2012-12-13 15:32 ` Gerd Hoffmann
2012-12-19 17:48 ` Hao Luo
2012-12-20 6:54 ` Gerd Hoffmann
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