Bug 75878

Summary:	[BDW] GPU hang running Raytracer WebGL demo
Product:	Mesa	Reporter:	Timo Aaltonen <tjaalton>
Component:	Drivers/DRI/i965	Assignee:	Kenneth Graunke <kenneth>
Status:	RESOLVED FIXED	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	commiethebeastie, eero.t.tamminen, yk, ypwong
Version:	9.1
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	error state

Description Timo Aaltonen 2014-03-07 10:40:58 UTC

Created attachment 95296 [details]
error state

running this demo results in firefox crashing and GPU hang/reset in dmesg:

http://people.mozilla.org/~sicking/webgl/ray.html

unigine-crypt does the same

running drm-intel-nightly from yesterday, mesa git master as of today

Comment 1 Kenneth Graunke 2014-03-17 15:52:23 UTC

I can confirm both of these hangs.  We have a couple of Piglit tests with very similar looking hangs as well.

Comment 2 commiethebeastie 2014-04-07 06:09:52 UTC

Linux kvm 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop 
OpenGL core profile version string: 3.1 (Core Profile) Mesa 10.1.0
OpenGL core profile shading language version string: 1.40
OpenGL core profile context flags: (none)
OpenGL core profile extensions:

[ 7119.744742] [drm] stuck on render ring
[ 7119.744748] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7119.744749] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7119.744750] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7119.744751] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7119.744752] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7119.747933] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x3de17000 ctx 3) at 0x3de18140
[ 7125.764317] [drm] stuck on render ring
[ 7125.784470] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x28936000 ctx 1) at 0x289362c0

Comment 3 Kenneth Graunke 2014-05-08 23:45:02 UTC

Should be fixed by:
http://article.gmane.org/gmane.comp.video.mesa3d.devel/77713

Comment 4 Matt Turner 2014-05-09 00:43:57 UTC

(In reply to comment #2)
> Linux kvm 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33 UTC 2014
> x86_64 x86_64 x86_64 GNU/Linux
> 
> OpenGL vendor string: Intel Open Source Technology Center
> OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop 

Not related. Create a new bug.

Comment 5 Kenneth Graunke 2014-05-09 21:52:16 UTC

Fixed by:
commit 9584959123b0453cf5313722357e3abb9f736aa7
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Thu May 8 16:44:37 2014 -0700

    i965: Fix GPU hangs on Broadwell in shaders with some control flow.
    
    According to the documentation, we need to set the source 0 register
    type to IMM for flow control instructions that have both JIP and UIP.
    
    Fixes GPU hangs in approximately 10 Piglit tests, 5 es3conform tests,
    Unigine Crypt, a WebGL raytracer demo, and several Steam titles.

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