First Person Template on Ubuntu consume 99% GPU on NVIDIA T4.

Hi! I need export my game to play in a Linux server with a T4 using pixel streaming plugin. I need at least 3 instances but the problem is only one instance is taking 99% of the GPU.

I created a First Person template, and without any modification I export for linux and I get GPU 99% used (the same result with my project).
The same project exported for Windows (in the same machine) takes 12% of GPU usage.

System spec:
AWS instance g4dn.xlarge
Video card Nvidia T4
Ubuntu Server 22.04
Unreal Engine 5.4.4 from Source.
First Person Template Blueprint.

What can I do to reduce the GPU load on linux?

Hi there!

It’s possible the project is trying to run with uncapped FPS, thus using as much of the GPU as possible.
Could you please run “t.MaxFPS 60” in the console of the running application and see if that helps reduce the load?

If it does, you can set fixed framerate in the project settings. If not we can look into it further!

Hi again! I try fixing the FPS to 30 and this improve the performance but it’s bad anyway.

I thought the problem was the T4 or A10G because was old tecnology, so, I changed the instance to a AWS g6.4xlarge with a NVIDIA L4.
In this instance, in Windows I run 6 project at the same time, and the GPU is less than 2%.

I installed everything on Ubuntu 22.04 and the fixed fps to 30 improves the performance but far from windows:

Thanks for answer.

Hey there!

In order to get information regarding performance across the different devices, could you try the following:

  1. Run the project with the T4 GPU on Windows, with drivers 555.42.06 (only if possible, if not the 550.90.07 drivers should be fine)
  2. Run the project with the L4 GPU on Linux using the 555.42.06 drivers.

Lastly, could you re-attempt the tests on Windows, but using -vulkan ? It should help determine where the issue lies.

Thank you

Hello!

Just checking in to see if you were still stuck with this issue or had any updates on the solution

Hi @MWillWallT !! Sorry for the delay—I’ve been swamped with work.

Today, I tested the First Person Project exported from an Ubuntu 22.04 machine on another Ubuntu machine, and it’s consuming the same amount of GPU resources.

It seems like the issue persists across different platforms (both cloud and desktop).

I will run some driver tests and update you with the findings.

Thanks for your patience.

Hi again. I’m trying to locate driver version 555.42.06 for Windows but haven’t been able to find it.

Here are the drivers available on the Nvidia website:


I tested Vulkan on a G4dn.xlarge instance, and the results were good, with only 3% GPU usage.

Here’s the driver version for the g4dn.xlarge instance:

It seems that Vulkan works fine on Windows. The issue might be related to Vulkan on Linux. If you can find driver version 555.42.06 for Ubuntu 22.04, I’d be able to test it to see if it resolves the problem.