[Spice-devel] Windows 10 guest: 2D/3D Accel

[Oscar Segarra]

Sorry Fredigano...

I have read again your detailed response... and I cannot see the option
where the client GPU is used... Is it expected the client GPU used with
"option 2"

Can you tell us when client GPU is used?

Thanks a lot.

2017-05-09 13:31 GMT+02:00 Oscar Segarra <oscar.segarra at gmail.com>:

> Ok, thanks for the detailed explanation... I'd suggest to publish it in
> your webpage in order to help other users.
>
> Óscar.
>
> 2017-05-09 13:24 GMT+02:00 Frediano Ziglio <fziglio at redhat.com>:
>
>> There's a bit of confusion.
>>
>> The VM sees which cards the hypervisor (Qemu in this case) is configured
>> to provide. As
>> any card GPUs can be
>> 1) physical, fully virtual
>> 2) paravirtual
>> 3) pass-through, specifically:
>> 3.1) full pass-through
>> 3.2) function pass-through
>>
>> 1) like VGA, a physical card is fully emulated, quite slow, there are
>> some cards which are better than others as requires less guest <->
>> hypervisor
>> switches;
>> 2) there are no physical card, the card is created just for virtual
>> environment.
>> This reduce the switches guest <-> hypervisor and optimized a lot of
>> functions.
>> Virgl cards, like QXL or VirtIO cards are like that. Are much more
>> efficient
>> and allows lot of features provided by virtual environment (like suspend
>> or migration). The "best" for Qemu and 3d is surely Virgl but as said
>> there's
>> no Windows drivers at the moment;
>> 3) you pass a full physical card or part of it. This CAN'T be used by the
>> host
>> and reduce control not allowing (usually) suspend and migration;
>> 3.1) basically an entire physical card is passed to the guest. If you
>> have an additional
>> GPU (graphical card) you can do it;
>> 3.2) some cards allow to provide part of its functions to be assigned like
>> if were a physical card. For GPU currently Qemu/KVM does not provide
>> much. Work is going to support Intel solutions and Nvidia ones.
>> Nvidia ones are usually quite expensive (cards do not fit in either
>> laptops
>> or even desktops) while Intel offers some really cheap solutions using a
>> mix of hardware/software solution.
>>
>> Frediano
>>
>>
>> Hi Christophe,
>>
>> Thanks a lot for your clarifications... can you help me with the other
>> questions?
>>
>> *Is there any way to check if is it using client GPU or host CPU?*
>>
>> *Is there any Grpahics card to be plugged in the host in order to use
>> host GPU?*
>>
>> thanks a lot.
>>
>>
>> 2017-05-09 12:03 GMT+02:00 Christophe Fergeau <cfergeau at redhat.com>:
>>
>>> Hey,
>>>
>>> On Tue, May 09, 2017 at 10:42:31AM +0200, Oscar Segarra wrote:
>>> > Hi,
>>> >
>>> > What kind of drivers are required in windows? (I supose you mean
>>> Windows
>>> > guest).
>>>
>>> A video driver able to use virtio-gpu + virgl would be needed, but does
>>> not exist at the moment. This is one of the Google Summer of Code
>>> projects for this year though.
>>>
>>> Christophe
>>>
>>
>>
>>
>
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