Performance hit when maintenance4 feature is used
Blisto91 opened this issue · comments
A while back the maintenance4 feature was disabled in dxvk due to both amdvlk and the Windows AMD driver taking a big performance hit when it is used. See doitsujin/dxvk#2784 (comment) for original dxvk dev comment and doitsujin/dxvk#2784 (comment) for original issue comparison between dxvk with and without the feature.
Also see commit doitsujin/dxvk@ec0c377
During some quick spot testing with my own new setup (7900XTX) i have not found it to be as big a hit as shown above (~30%), but i see around a ~5% drop whereas radv doesn't seem to really change. Dunno if perf percentage hit depends on exact setup used. I'm personally only using 1080p at the moment so i'm not GPU bound in the same way.
Below are some examples with dxvk commit before feature was disabled (first screenshot) and when it was (second)
The Witcher 3 d3d11
The Witcher 3 d3d11 radv for comparison
As a quick update maintenance4 have been enabled on master dxvk again, just not for AMDs drivers doitsujin/dxvk@6ef98c6