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#1 2021-11-14 16:18:31

insti
Member
Registered: 2021-08-24
Posts: 6

Desktop/game framerate drops significantly when GPU usage reaches 100%

Hi, this is my first thread so hopefully I'm doing this right.

These are my specs:
- AMD Ryzen 7 5800X
- AMD Radeon RX 5500 XT
- 32GB RAM

I am on the 5.15.0-arch1-1-vfio kernel (I have a passed thru RX 6800 XT) with mesa drivers, and have all the graphics related packages installed (Vulkan and such). I am using bspwm with picom, and I have the exact same issues even when picom is killed. To be clear I'm having these issues under native Linux, I have no issues with my games under my VFIO VM.

I'm having an issue where the game reports a certain framerate, but visually I can clearly see I am not even getting half of that, and the desktop itself also becomes extremely choppy. When I limit the fps of the game to say 30fps, and the GPU usage is no longer at 100%, all of these issues disappear. This happens on multiple games as well as Looking Glass.
For example, when I'm playing FFXIV installed thru Lutris, the game reports 90fps, but I can clearly see that its probably pushing out barely 20-30fps. The game performs better when I limit it to 30fps. This is extremely strange as on my laptop with a 1650 I am getting 90+ fps with no issues with the same software setup (bspwm with picom with the same configs).

I searched all around Google to no avail. If anyone can point me to the right direction that would be wonderful.

Thank you in advance!

Last edited by insti (2021-11-14 16:22:04)

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#2 2021-11-15 04:29:51

KrakinTheKonsole
Member
Registered: 2021-11-15
Posts: 1

Re: Desktop/game framerate drops significantly when GPU usage reaches 100%

Install AMDGPU Drives Properly I guess
https://wiki.archlinux.org/title/AMDGPU :\

I dont use AMD so I really dont Know but one thing that I can say that You can disable your Compositor for better performance and enable ZRAM-Swap


Intel HD supremacy

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#3 2021-11-15 06:56:34

insti
Member
Registered: 2021-08-24
Posts: 6

Re: Desktop/game framerate drops significantly when GPU usage reaches 100%

So after a lot of searching around I found the culprit: it's TearFree.

Apparently TearFree has an issue where when GPU usage hits 100% perceived framerate slows to a crawl.

https://bugs.freedesktop.org/show_bug.cgi?id=105530#c10
https://www.reddit.com/r/linux_gaming/c … and_vsync/

Turning off TearFree and killing picom has completely fixed the issue for me. The thing is though, I did not have this issue about three months ago, it just sort of happened. I thought my GPU died and I even bought a new one to replace it and it had the exact same problem. After a bit of digging, I found this thread:
https://www.reddit.com/r/linux_gaming/c … dgpu_feel/
Which coincides with around the same time frame I started having issues too.

If anyone knows what might be wrong, please share!

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