[Spice-devel] centos+kvm+nvidia vgpu+win10(guest) spice remote 4K bad perform.

[Uri Lublin]

Hi Leo,

On Thu, May 26, 2022 at 4:28 PM 张伟华 <15529316683 at 163.com> wrote:

>
> Hi Uri:
> Thanks for your advise of our project.We have try it and here is something
> we find:
> 1.we have deploy the spice-streaming-agent in the client and set H254 in
> libvert xml , applice report error and don't work.
> but vp8/vp9 works.
>

Note that spice-streaming-agent needs to run on the guest.



> 2.When we use Nvidia vgpu as a mdev device attach to the virtual mathine, *we
> find in logs that spice use picture compress (glz) instead of vedio
> compress h254.*
> So we have two question to ask:
> 1.what we need to do in libvert xml to have a better vedio quality witH
> NVIDIA VGPU attach as a mdev divice?
>

This is not done in libvirt domxml, but needs to be configured on the guest.
(of course you need to have org.spice-space.stream.0 via libvirt)

Make sure that the guest's gstreamer1 "knows" the codec.
It works much better when the encoder uses the hardware to encode.

gst-inspect-1.0 | grep 264  | grep -i enc
gst-inspect-1.0 | grep -i vp  | grep -i enc


> 2.We didn't find spice-streaming-agent for windows in Spice office site.
> Does spice-streaming-agent only support linux and only have linux version?
>

Yes, currently there is only a linux version.

Regards,
    Uri.

ps: One single display  and 4k video is required as one of the main goals
> in our project.
> Pls help us with those questions.
> Best wishes !
> leo zhang
>
>
>
>
>
> At 2022-05-20 04:38:55, "Uri Lublin" <uril at redhat.com> wrote:
>
> Hi Leo,
>
> On Thu, May 19, 2022 at 1:43 PM 张伟华 <15529316683 at 163.com> wrote:
>
>> Hi :
>> I am a phd student of Xian Jiaotong university in China.
>> We have a project to accomplish a remote-desk solution with Nvidia vgpu.
>> We use spice latest version  and have a bad 4K display quality.
>> Our environment is like:
>> 1.T4 card with inspure server in nvidia support list
>>
> NVIDIA Tesla T4  GPU card
>
> 2.redhat 8.2 enterprise  with kvm qemu
>>
>
>
>> 3.vgpu software package is 13.x
>>
> NVIDIA driver + tools (GRID)
>
>
>> 4.vw flavor is 8u 16G. with 40 storage.   vgpu license is vpc ,and vgpu
>> is B-2b.
>>
> "vw" == Virtual Workstation
> B-2b is the vGPU type? meaning T4-2B ?
> Does it help if you configure it with T4-2Q (may require a different
> license)?
>
> Only a single Display, right ?
>
> Are you running spice-streaming-agent on the guest ?
> Try to stream with H264, if you do not already do it
> (may require paying fees for using H264).
>
> Is 4k resolution a requirement? If not, try with e.g. 2k.
>
> Hope that helps,
>     Uri
>
>
>
>> And our issue is attached in appendix.
>> Please give us some help to solve this.
>>
>> best wishs;
>> leo zhang
>>
>>
>>
>>
>>
>
>
>
>
>
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