Re: high load with usb device

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12.09.2010 13:26, Avi Kivity пишет:
>  On 09/10/2010 07:17 PM, Michael Tokarev wrote:
>> Note the changed subject line.
>>
>> I just did a few tests with linux guest (amd64 2.6.35 kernel).
>>
>> And it shows the same behavour as win7 (unlike winXP), namely,
>> high host CPU load when guest is idle.
> 
> Not for me - F12 idle guest takes 3.5% cpu.
> 
> What does 'top' in the guest show now?  Connect with ssh to avoid
> triggering the GUI.

Guest:
Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st

Host:
Cpu(s):  5.3%us,  6.7%sy,  0.0%ni, 88.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
25685 mjt       20   0 1074m 109m 4652 S   19  1.9   0:29.03 qemu-system-x86

So it appears it's the qemu process that's doing something,
after all.  Is there a way to compile it with profiling
information?  I tried, but it does not compile: it uses
-fomit-frame-pointer which is not compatible with -p[g],
but when removing -fo-f-p it complains about assembly.

Thanks!

/mjt
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