[Bug 105934] Gpu Hang after two compute dispatches on Intel HD 5500

[Bug 105934] Gpu Hang after two compute dispatches on Intel HD 5500

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https://bugs.freedesktop.org/show_bug.cgi?id=105934

            Bug ID: 105934
           Summary: Gpu Hang after two compute dispatches on Intel HD 5500
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i915
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mankeli@kolumbus.fi
        QA Contact: dri-devel@lists.freedesktop.org

Running OpenGL program with two glDispatch() calls, causes gpu hang on HD
Graphics 5500.

Program basically does:
if (1)
{
        glUseProgram(computeprogram);
        glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, ssbo_test);
        glDispatchCompute(256/4, 256/4, 256/2);
        glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
}
if (1)
{
        glUseProgram(computeprogram);
        glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, ssbo_test);
        glDispatchCompute(256/4, 256/4, 256/2);
        glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
}
.. and then simple one-triangle fullscreen pass to main framebuffer (0) using
that SSBO.

When both of those are enabled, my computer nearly hangs and dmesg reports:
[127049.481163] drm/i915: Resetting chip after gpu hang.

But if only one of those is enabled, everything is ok, compute dispatch takes
13ms and debug output renders on the screen.

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[Bug 105934] Gpu Hang with timestamp queries and compute dispatches on Intel HD 5500

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https://bugs.freedesktop.org/show_bug.cgi?id=105934

mankeli@kolumbus.fi changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Gpu Hang after two compute  |Gpu Hang with timestamp
                   |dispatches on Intel HD 5500 |queries and compute
                   |                            |dispatches on Intel HD 5500

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[Bug 105934] Gpu Hang with timestamp queries and compute dispatches on Intel HD 5500

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https://bugs.freedesktop.org/show_bug.cgi?id=105934

--- Comment #1 from mankeli@kolumbus.fi ---
Scratch previous comment: It seems that the GPU hang is actually caused by
GL_TIMESTAMP queries between two compute dispatches. I've attached test program
to exploit this behavior.

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[Bug 105934] Gpu Hang with timestamp queries and compute dispatches on Intel HD 5500

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https://bugs.freedesktop.org/show_bug.cgi?id=105934

--- Comment #2 from mankeli@kolumbus.fi ---
Created attachment 138687
  --> https://bugs.freedesktop.org/attachment.cgi?id=138687&action=edit
Small program with two compute dispatches and draw

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[Bug 105934] Gpu Hang with timestamp queries and compute dispatches on Intel HD 5500

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https://bugs.freedesktop.org/show_bug.cgi?id=105934

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

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

--- Comment #3 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/783.

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