Re: [Qemu-devel] Performance of usb tablet over ehci

["Hao Luo"<luo_brian@126.com>]

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Gerd,

Thanks very much.

I tried to install usb 3.0 driver in win7 guest, and the cpu load decreased to about 9%, as much as PS2 mouse emulation.

BTW, there are >90 fds polled by qemu_iohandler_poll(). According to the perf profiling report, when uhci hid mouse is enabled, this function will be called much more frequently than using PS2 mouse. Any source code or functions I should refer to so that I can find out which fds take most of CPU time? 

2012-12-20



Hao Luo



发件人：Gerd Hoffmann
发送时间：2012-12-13 23:32
主题：Re: [Qemu-devel] Performance of usb tablet over ehci
收件人："luo_brian"<luo_brian@126.com>
抄送："Hans de Goede"<hdegoede@redhat.com>,"qemu-devel"<qemu-devel@nongnu.org>

On 12/13/12 16:25, luo_brian wrote: 
> 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. 

win7 doesn't ship with a xhci driver (win8 does). 

cheers, 
  Gerd 

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