vkd3d-proton
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HansKristian-Work
Extremely high CPU load with ray tracing in Hogwarts Legacy
There is very high CPU load at dense places like Hogwarts and Hogsmeade when traversing, e.g. ~90% load on 8C 16T. This is not normal, CPU load on Windows is more like half of it (i.e. poor UE4 MT). It doesn't occur with RT off. There is a similar issue in Immortals of Aveum (too in dense hubs with many NPCs). But not sure if related, as that one should be software-RT only.
Software information
Latest Hogwarts Legacy Steam version, maximum settings, RT reflections-only, RT ultra
System information
- GPU: RX 7800 XT
- Driver: RADV git-master fb934751394749982ee854d6ca2cb24f8ce54e27 , Linux 6.7.0
- Wine version: Latest Proton Experimental
- VKD3D-Proton version: 12f561cfe2156714ba17d3322230b87b65739714
Log files
If I had to guess it's RADV compiling RT pipelines (which are pretty big in UE games) in the background. Improvements for compilation performance are in the works on the RADV side.
I can confirm the issue in "Lordsfell" in Immortals of aveum. Simply entering the location or staring at the stairs later on causes 80-90% cpu load on my 5950x and the fps tank down to ~ 25fps. Googling shows that the game is not using hardware rt, but lumen software rt. The issue is the same with radv and amdvlk. In addition the issue does not stop after some time.
