Re: [Qemu-devel] Linux KVM, Windows 7 guest choppy sound

[Avi Kivity]

On 09/10/2012 12:06 PM, Jan Kiszka wrote:

>>> Known issue, likely unfixable in QEMU due to hard-coded constraints of
>>> the driver Windows uses (too small playback buffers).
>> 
>> Would using real-time priority for the guest improve things?
>> 
>> Of course that can be dangerous if the guest decides to spin and has as
>> many vcpus as you have cores.
> 
> We need to decouple the data path of that device from the rest of QEMU
> first. Just prioritizing likely doesn't help. 

Depends on what the guest is doing, but likely you are right.  Luckily
we're already doing that.

> And then the problem might
> be getting sufficient reactivity from the QEMU-external audio data path
> as well.

Those already have realtime priority.  Doesn't guarantee the path is
short enough but it may work.

-- 
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