mdev specific nvidia profile overrides about vgpu_unlock-rs

[alx696]

Seems just resolution settings wroks:

[profile.nvidia-257]
num_displays = 1
display_width = 1920
display_height = 1080
max_pixels = 2073600

I want limit frame rate to 60, but frl_enabled = 1 not works. Games fps will bigger than 60. Setting the max framerate in the nvidia control panel works.

Additional, do not set framebuffer! Otherwise, there will be random errors:

• failed to read device config space: Bad address
• failed to get region 0 info: Input/output error

Try it a few times, it may go wrong and it will disappear.

[mbilker]

At line 146 of lib.rs I can see that there are options like gpu_type and vgpu_type. What are these for?

They come straight from /usr/share/nvidia/vgpu/vgpuConfig.xml. gpu_type is the vGPU type ID. vgpu_type is the class (e.g. Quadro, NVS, Compute).

[mbilker]

Additional, do not set framebuffer!

You can set framebuffer, but you have to make sure your card has enough VRAM free to support the allocation and that it has it in a single memory pool (i.e. not using a GTX 970 with its 3.5 GB and 0.5 GB memory pool split). I usually go off the framebuffer value for another profile in vgpuConfig.xml.

[mbilker]

As for the frame-rate limiter, multiple things can affect that.

[mbilker]

For setting a frame-rate limit, use frl_config and set frl_enabled = 1. Additionally, it seems that setting the vgpu_type to Quadro requires certain hardware level features that are not available on GeForce cards. For full OpenGL performance, you can either use the older 450 driver release series or set vgpu_type = "NVS".