Bug 111340 - [LLVM] DIRT 3 horrible performance when Shadows set to very high
Summary: [LLVM] DIRT 3 horrible performance when Shadows set to very high
Status: NEW
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Vulkan/radeon (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: mesa-dev
QA Contact: mesa-dev
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Reported: 2019-08-09 16:03 UTC by Gregor Münch
Modified: 2019-08-09 16:03 UTC (History)
0 users

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Description Gregor Münch 2019-08-09 16:03:18 UTC
Once you set Shadows to very high in the Options Menu the game slows down. You have to use DXVK to run the game, version doesnt matter.

I already reported this last year when I was still using my Radeon HD 7970:
https://github.com/doitsujin/dxvk/issues/67#issuecomment-421925690

The game takes a nose dive from 134 to 29 fps once you switch the settings.

I tried today with my new Vega 56 and ACO:
with LLVM: 72,5 fps
with ACO: 206,3 fps

So we finally have the proof that LLVM is causing this. This might be the same problem we have with the long standing and still valid bug:
https://bugs.freedesktop.org/show_bug.cgi?id=100069


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