Bug 82437 - [BDW] GPU hang when running spec/glsl-1.50/execution/geometry/max-input-components
Summary: [BDW] GPU hang when running spec/glsl-1.50/execution/geometry/max-input-compo...
Status: RESOLVED WORKSFORME
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: git
Hardware: Other All
: high major
Assignee: Ian Romanick
QA Contact: Intel 3D Bugs Mailing List
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Reported: 2014-08-11 00:04 UTC by Kenneth Graunke
Modified: 2015-05-23 21:31 UTC (History)
0 users

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Description Kenneth Graunke 2014-08-11 00:04:05 UTC 
On Broadwell, running:

$ PIGLIT_PLATFORM=gbm shader_runner tests/spec/glsl-1.50/execution/geometry/max-input-components.shader_test -auto

appears to cause GPU hangs, but only some of the time.  Other times, it passes.  The error state has IPEHR at a PIPE_CONTROL, and the CS (command streamer) and GS are busy.  Probably a hang while running the geometry shader.
Comment 1 Jim Bish 2015-05-20 01:01:02 UTC 
Is this still an issue?  I just ran the test for 10k iterations with no issue.
Comment 2 Kenneth Graunke 2015-05-23 21:31:31 UTC 
Seems to work these days - closing.

I'm guessing I was getting bit by the "GS Number of URB Entries must be less than or equal to the GS Maximum Number of Threads" workaround that I never implemented, which isn't necessary on production hardware.

Either that or we just fixed something.

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