[Qemu-devel] Re: [5578] Increase default IO timeout from 10ms to 5s

[Jan Kiszka <jan.kiszka@web.de>]

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Anthony Liguori wrote:
> Jan Kiszka wrote:
>> Anthony Liguori wrote:
>>  
>>> If anyone notices a slow down, I'd check this revision.  There may be
>>> broken bits of code out there that depends on wake up rate.  I've done a
>>> fair bit of testing and haven't found any but you never know.
>>>     
>>
>> OK, here is one brokenness for you: Musicpal (qemu-arm-system) becomes
>> unusable, sounds is stopping for seconds, even keyboard input is
>> inpossible, including switching to the monitor console. What should I
>> check for? Note that this board uses a ptimer to a PIT to the guest. May
>> this make a difference here?
>>   
> 
> Keyboard input should be governed by the VGA refresh timer which should
> be firing 30 times a second.

If you mean *the* VGA emulation - there is none, the target is an
embedded ARM board.

> 
> How do you have qemu configured?

qemu-system-arm -M musicpal -pflash musicpal.image -snapshot \
	-kernel u-boot.image -serial stdio
(I can provide you both privately if you want to play with it.)

>  Are you using SDL?

Yes.

> What sound driver
> are you using on the host?

ALSA.

Jan


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