Bug 87568

Summary:	WebGL can cause GPU reset
Product:	Mesa	Reporter:	almos <aaalmosss>
Component:	Drivers/Gallium/r600	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED MOVED	QA Contact:
Severity:	normal
Priority:	medium	CC:	felix.schwarz
Version:	10.3
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description almos 2014-12-21 21:57:55 UTC

I was given this link: http://hunger.hu/webgl.html which was supposed to crash any video driver, and it really did a hiccup. Fortunately, after 1 second the kernel detected GPU lockup, and reinitialized everything just fine.

As far as I can tell that javascript doesn't do anything sinister, just tries to render 200k triangles with a single glDrawElements() call. Shouldn't there be a protection against such simple overflows somewhere?

Comment 1 Ian Romanick 2014-12-22 19:09:10 UTC

It can be impossible to tell the difference between a draw that will take a very long time and a draw that will never complete, so possibly not.  See also http://en.wikipedia.org/wiki/Halting_problem.

Comment 2 Marek Olšák 2014-12-24 14:21:50 UTC

Did you set your lockup timeout to 1s? I recommend reverting to the default timeout (10s).

Comment 3 almos 2015-01-17 00:29:21 UTC

(In reply to Ian Romanick from comment #1)
> It can be impossible to tell the difference between a draw that will take a
> very long time and a draw that will never complete, so possibly not.  See
> also http://en.wikipedia.org/wiki/Halting_problem.

That's why WebGL was a bad idea in the first place.

As far as I can remember the timeout was 1 second, but since then I upgraded my system, kernel included, and when I tried now the timeout was 10s.

Comment 4 GitLab Migration User 2019-09-18 19:18:48 UTC

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