Re: centos+kvm+nvidia vgpu+win10(guest) spice remote 4K bad perform.

[Uri Lublin <uril@xxxxxxxxxx>]

Hi Leo,

On Thu, May 26, 2022 at 4:28 PM 张伟华 <15529316683@xxxxxxx> 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@xxxxxxxxxx> wrote:

Hi Leo,

On Thu, May 19, 2022 at 1:43 PM 张伟华 <15529316683@xxxxxxx> 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