[RADV] Severe performance drop when exceeding VRAM compared to AMDVLK
Hello. I found out that on RADV performance drops significantly when VRAM runs out, while AMDVLK handles this much better.
As can be seen from the screenshots below, there is a quadruple difference in performance compared to AMDVLK. Game settngs are the same for both cases, in every case i exceeded VRAM amount by 1 GB by manually setting textures quality to Ultra in the settings file.
Of course it's normal that performance drops when VRAM runs out, because system RAM is much slower, but on RADV it drops enormously.
This applies not only to Red Dead Redemption 2, i also tested some other games (GreedFall, Sekiro: Shadows Die Twice, The Witcher 3) and they all perform much better (usually 3x-4x times better) on AMDVLK when exceeding VRAM amount.
- OS: Arch Linux
- GPU: AMD RX 560 2 GB
- Kernel version: 5.4.71
- Mesa version: 20.2.1
- Desktop manager and compositor: OpenBox, no compositor
AMDVLK:
RADV: