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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [regression][radeonsi][polaris]"radeonsi: set IF_THRESHOLD to 3" breaks Wither2's ground"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98761">98761</a>
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<th>Summary</th>
<td>[regression][radeonsi][polaris]"radeonsi: set IF_THRESHOLD to 3" breaks Wither2's ground
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>arek.rusi@gmail.com
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=128044" name="attach_128044" title="ground looks weird">attachment 128044</a> <a href="attachment.cgi?id=128044&action=edit" title="ground looks weird">[details]</a></span>
ground looks weird
mesa/llvm git/trunk
kernel 4.8.x & drm-next-4.10-wip
this is happend on polaris(rx470)
verde works corectly (for radeon drv, amdgpu not tested yet)
bisected:
74e39de9324d2d2333cda6adca50ae2a3fc36de2 is the first bad commit
commit 74e39de9324d2d2333cda6adca50ae2a3fc36de2
Author: Marek Olšák <<a href="mailto:marek.olsak@amd.com">marek.olsak@amd.com</a>>
Date: Fri Oct 28 23:08:50 2016 +0200
radeonsi: set IF_THRESHOLD to 3
Piglit regressions (radeonsi or LLVM bugs, they pass on softpipe):
- glsl-1.10/execution/variable-indexing/vs-output-array-vec3-index-wr
- glsl-1.10/execution/variable-indexing/vs-output-array-vec4-index-wr
- glsl-110/execution/variable-indexing/vs-temp-array-mat2-index-col-row-wr
- glsl-110/execution/variable-indexing/vs-temp-array-mat2-index-row-wr
Totals:
SGPRS: 1132185 -> 1168801 (3.23 %)
VGPRS: 907856 -> 906204 (-0.18 %)
Spilled SGPRs: 2011 -> 2425 (20.59 %)
Spilled VGPRs: 368 -> 96 (-73.91 %)
Scratch VGPRs: 1344 -> 1060 (-21.13 %) dwords per thread
Code Size: 35916164 -> 35705372 (-0.59 %) bytes
LDS: 767 -> 767 (0.00 %) blocks
Max Waves: 194010 -> 194921 (0.47 %)
Wait states: 0 -> 0 (0.00 %)
Before:
VGPR SPILLING APPS Shaders SpillVGPR ScratchVGPR
alien_isolation 2938 38 40
bioshock-infinite 1769 245 732
dirt-showdown 548 85 72
f1-2015 776 0 320
ue4_lightroom_inter.. 74 0 180
After:
VGPR SPILLING APPS Shaders SpillVGPR ScratchVGPR
alien_isolation 2938 38 40
bioshock-infinite 1769 0 480
dirt-showdown 548 58 40
f1-2015 776 0 320
ue4_lightroom_inter.. 74 0 180
Bioshock and DiRT benefit.
If I set IF_THRESHOLD=4, tesseract starts spilling VGPRs
Reviewed-by: Nicolai Hähnle <<a href="mailto:nicolai.haehnle@amd.com">nicolai.haehnle@amd.com</a>>
:040000 040000 2c773601e2956578e8da4a6031cb02837255b953
7d5f7c3faebe4a11631e70bde258d78fa7357008 M src</pre>
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