https://bugs.freedesktop.org/show_bug.cgi?id=98776
Bug ID: 98776 Summary: [regression] Rendering glitches in Life Is Strange Product: Mesa Version: git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: daniel@constexpr.org QA Contact: dri-devel@lists.freedesktop.org
Created attachment 128065 --> https://bugs.freedesktop.org/attachment.cgi?id=128065&action=edit Glitched car windows
The game Life Is Strange has various rendering glitches with current mesa master.
I have recorded an apitrace of the game: http://constexpr.org/tmp/LifeIsStrange-radeonsi.trace.xz (124 MiB)
The trace contains garbage geometry that is not there in the game (probably due to persistent coherent mappings - the game crashes with MESA_EXTENSION_OVERRIDE=-GL_ARB_buffer_storage), but the glitched car windows seen in the screenshot are visible. I've tracked the origin of the glitches to e.g. draw call 4741838.
All of the glitches go away when reverting commit 74e39de "radeonsi: set IF_THRESHOLD to 3" while https://patchwork.freedesktop.org/patch/122101/ does not help, so this is likely related to bug #98761.
GPU: R9 380X (tonga) Kernel: 4.8.7-gentoo Mesa: git-0c85d2f LLVM: r287273
https://bugs.freedesktop.org/show_bug.cgi?id=98776
--- Comment #1 from Daniel Scharrer daniel@constexpr.org --- Created attachment 128066 --> https://bugs.freedesktop.org/attachment.cgi?id=128066&action=edit Glitched shoreline
https://bugs.freedesktop.org/show_bug.cgi?id=98776
--- Comment #2 from Daniel Scharrer daniel@constexpr.org --- Created attachment 128067 --> https://bugs.freedesktop.org/attachment.cgi?id=128067&action=edit Glitched face
There are more examples of glitches that all look slightly different - however the glitches always affect the same objects and the glitch for each objects looks more or less the same for each run. All glitches that I have noticed are fixed by reverting the mentioned commit.
https://bugs.freedesktop.org/show_bug.cgi?id=98776
--- Comment #3 from Daniel Scharrer daniel@constexpr.org --- Reverting LLVM r286766 "AMDGPU: Implement SGPR spilling with scalar stores" (while not reverting anything in Mesa) also fixes the glitches.
https://bugs.freedesktop.org/show_bug.cgi?id=98776
--- Comment #4 from Arek Ruśniak arek.rusi@gmail.com --- Daniel I can't reproduce this on verde/polaris probably this can be HW specific issue. And I can't replay your trace because apitrace crashes with:
4108417: warning: region 0x7f26ce079000-0x7f26ce07a188 intersects existing region 0x7f26ce07a000-0x7f26ce07a120 glretrace: /build/apitrace/src/apitrace-7.1/retrace/retrace_swizzle.cpp:166: std::map<long long unsigned int, retrace::Region>::iterator retrace::lookupRegion(long long unsigned int): Assertion `contains(it, address)' failed. apitrace: warning: caught signal 6 4108425: error: caught an unhandled exception glretrace+0x234eec /usr/lib/libpthread.so.0+0x1107f /usr/lib/libc.so.6: gsignal+0xcf /usr/lib/libc.so.6: abort+0x169 /usr/lib/libc.so.6+0x2bea6 /usr/lib/libc.so.6: __assert_fail+0x41 glretrace+0xd9ef glretrace+0xe7cb glretrace+0xdb15 glretrace+0xd7e8 glretrace+0xc48b glretrace+0xcbe9 glretrace+0xce91 /usr/lib/libpthread.so.0+0x7453 /usr/lib/libc.so.6: clone+0x5e ? apitrace: info: taking default action for signal 6 Aborted (core dumped)
https://bugs.freedesktop.org/show_bug.cgi?id=98776
Daniel Scharrer daniel@constexpr.org changed:
What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED
--- Comment #5 from Daniel Scharrer daniel@constexpr.org --- Everything renders fine with LLVM r289080 and Mesa git-31f988a9d6.
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