VRAM & GTT probably show wrong.

[EUA]

Hi, I use 1GB GPU.
After opening lots of tabs at Firefox, under wayland
radeontop, shows VRAM > 98 GB and GTT > 300GB

Yes, if GPU memory is not enough, than some of system ram is used.
But I just have 32GB RAM at my system and info shown on radeontop looks not correct.
It has to be some bugs at driver level or radeontop.

[Simmonz]

I can say this issue happens with myself as well. The VRAM just starts climbing and can get to several thousand percent above what it could possibly be.

My system:

Gigabyte R9 270 2GB | Mesa 20.3.1 | Manjaro 20.2 | Mate 1.24.1 | Kernel 5.10.2-2-MANJARO | X11

[chromer030]

Same here :

Arch Linux | Linux 5.10.4 | Mesa 20.3.2 | X11

[a5a5aa555oo]

Same here.

Arch Linux | Linux 5.10.7-arch1-1 | mesa 20.3.2-2 | X11 | Raeon R7 240 1GB GDDR5

[k8ieone]

As mentioned in #108, this is probably a kernel bug. This means that radeontop can't really do anything about this. We should decide if anyone here wants to open a bug report in Linux, as suggested by @clbr. We should find out approximately what kernel version this started with tho.

[k8ieone]

IIRC this started at around version 5.9.x. I'm only going from memory since I didn't write it down.

[k8ieone]

I just tried with 5.4.97 LTS and the values there actually seem OK. So this is indeed caused by a kernel bug.

[k8ieone]

I tried a very simple search to see if there is already a bug report about this but it seems like there isn't.

[chromer030]

Hi everyone, I'm on kernel 5.11.1 and it seems that the issue is resolved, but now, in-use VRAM/GTT is always zero !

[EUA]

On Linux Ryzen 5.11.8, using rx570 GPU with 4GB VRAM and it looks working proper now.

[k8ieone]

I just tested with Kernel 5.11.9 on a Radeon HD 2000 Mobile Series GPU (radeon driver) and it still shows zero for the memory values.