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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW] "Emit ELSE/ENDIF JIP with type D on Gen 7" causes Atomic Afterlife and GPU hangs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84557">84557</a>
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</tr>
<tr>
<th>Assignee</th>
<td>mattst88@gmail.com
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW] "Emit ELSE/ENDIF JIP with type D on Gen 7" causes Atomic Afterlife and GPU hangs
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>eero.t.tamminen@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Product</th>
<td>Mesa
</td>
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<pre>TEST SETUP:
- HSW GT3e
- Ubuntu 14.04 Mesa from git
TEST CASE:
- Run Unigine Heaven 4.0, with following options:
-project_name Heaven \
-data_path ../ \
-engine_config ../data/heaven_4.0.cfg \
-system_script heaven/unigine.cpp \
-sound_app null \
-video_app opengl \
-video_mode -1 \
-video_width 1920 \
-video_height 1080 \
-video_fullscreen 1 \
-video_multisample 0 \
-extern_define
,BENCHMARK,RELEASE,LANGUAGE_EN,QUALITY_HIGH,TESSELLATION_DISABLED
EXPECTED RESULTS:
- Normal looking screen, no hangs, test finishes succesfully
ACTUAL RESULT:
- When demo has loaded, instead of the normal colors, screen is blue/green (see
attachment)
- Then, after few seconds Heaven fails to following error:
intel_do_flush_locked failed: Input/output error
- dmesg contains "render ring hung inside bo" and "context hanging too fast"
errors
I bisected this to following commit:
commit 54e30dbf4db437748509d1319c3f6e4185f76c69
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
AuthorDate: Wed Aug 27 18:40:46 2014 -0700
Commit: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
CommitDate: Thu Sep 25 11:02:36 2014 -0700
i965: Emit ELSE/ENDIF JIP with type D on Gen 7.
The spec says the type must be W (JIP is 16-bits after all), but we've
been emitting it with a UD type all along and have experienced no
adverse effects. Changing the type to D allows ELSE and ENDIF
instructions to be compacted.
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reviewed-by: Jason Ekstrand <<a href="mailto:jason.ekstrand@intel.com">jason.ekstrand@intel.com</a>>
Reverting that commit fixes the issue.</pre>
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