[Bug 107857] [apitrace] GPU hang on VEGA10

[Bug 107857] [apitrace] GPU hang on VEGA10

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https://bugs.freedesktop.org/show_bug.cgi?id=107857

            Bug ID: 107857
           Summary: [apitrace] GPU hang on VEGA10
           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: joseph.kucia@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 141472
  --> https://bugs.freedesktop.org/attachment.cgi?id=141472&action=edit
apitrace

This can be reproduced reliably using the attached apitrace.

OpenGL renderer string: Radeon RX Vega (VEGA10, DRM 3.23.0, 4.15.5-gentoo, LLVM
6.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.3.0-devel
(git-1c7a2433b2)

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[Bug 107857] GPU hang - GS_EMIT without shader outputs

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https://bugs.freedesktop.org/show_bug.cgi?id=107857

Józef Kucia <joseph.kucia@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[apitrace] GPU hang on      |GPU hang - GS_EMIT without
                   |VEGA10                      |shader outputs

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[Bug 107857] GPU hang - GS_EMIT without shader outputs

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https://bugs.freedesktop.org/show_bug.cgi?id=107857

--- Comment #1 from Józef Kucia <joseph.kucia@gmail.com> ---
GS_EMIT without shader outputs seems to cause GPU hangs. Radeonsi generates
shaders with GS_EMIT without writing shader outputs when geometry shader
outputs are optimized out.

a potential fix:
https://lists.freedesktop.org/archives/mesa-dev/2018-September/205848.html
piglit test:
https://lists.freedesktop.org/archives/piglit/2018-September/025092.html

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[Bug 107857] GPU hang - GS_EMIT without shader outputs

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107857

Józef Kucia <joseph.kucia@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Józef Kucia <joseph.kucia@gmail.com> ---
Fixed by commit e24a4e05c7a7b9f3a06fa55284d6258ceff44fdd
https://cgit.freedesktop.org/mesa/mesa/commit/?id=e24a4e05c7a7b9f3a06fa55284d6258ceff44fdd

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