Summary: | anv: Dota2 rendering corruption | ||
---|---|---|---|
Product: | Mesa | Reporter: | Scott D Phillips <scott.d.phillips> |
Component: | Drivers/Vulkan/intel | Assignee: | Jason Ekstrand <jason> |
Status: | RESOLVED FIXED | QA Contact: | Intel 3D Bugs Mailing List <intel-3d-bugs> |
Severity: | normal | ||
Priority: | medium | CC: | currojerez, jason, mattst88 |
Version: | git | ||
Hardware: | Other | ||
OS: | All | ||
Whiteboard: | |||
i915 platform: | i915 features: | ||
Bug Depends on: | |||
Bug Blocks: | 104757 | ||
Attachments: |
Screenshot
Broken shader with post-RA scheduling enabled "fixed" shader with post-RA scheduling disabled |
Created attachment 137203 [details]
Broken shader with post-RA scheduling enabled
Created attachment 137204 [details]
"fixed" shader with post-RA scheduling disabled
I've narrowed this down quite a bit now. This branch contains a patch which can help pin-point the exact shader: https://cgit.freedesktop.org/~jekstrand/mesa/commit/?h=wip/bug-104923 Anything which perturbs instructions seems to fix it. I think it's actually a bug in post-RA scheduling. If I disable post-ra scheduling everything goes back to passing. Patch is on the list: https://patchwork.freedesktop.org/patch/207523/ This has been fixed by the following commit in master: commit ff4726077d86800d33520581f154a27dac408588 Author: Jason Ekstrand <jason.ekstrand@intel.com> Date: Wed Feb 28 19:57:44 2018 -0800 intel/fs: Set up sampler message headers in the visitor on gen7+ This gives the scheduler visibility into the headers which should improve scheduling. More importantly, however, it lets the scheduler know that the header gets written. As-is, the scheduler thinks that a texture instruction only reads it's payload and is unaware that it may write to the first register so it may reorder it with respect to a read from that register. This is causing issues in a couple of Dota 2 vertex shaders. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104923 Cc: mesa-stable@lists.freedesktop.org Reviewed-by: Francisco Jerez <currojerez@riseup.net> |
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Created attachment 137146 [details] Screenshot Starting with ("4c7af87fb92 anv: Enable UBO pushing"), I'm seeing some corrupted rendering in Dota 2 with anv on my kbl_gt2. I'm seeing this by watching the recording of MatchID 3372726385. At about 1:10 in the recording the little guy pops up at the bottom and has some bad vertices.