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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL/BSW/BDW]WebGL rendering delayed too much on nop particles and renders with 0-1FPS"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97035">97035</a>
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<th>Summary</th>
<td>[SKL/BSW/BDW]WebGL rendering delayed too much on nop particles and renders with 0-1FPS
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>IA64 (Itanium)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
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<th>Reporter</th>
<td>nataraj.deshpande@intel.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=125249" name="attach_125249" title="ui logs collected from chromebook with --disable-gpu-watchdog">attachment 125249</a> <a href="attachment.cgi?id=125249&action=edit" title="ui logs collected from chromebook with --disable-gpu-watchdog">[details]</a></span>
ui logs collected from chromebook with --disable-gpu-watchdog
Steps to Reproduce
===============
go to <a href="http://www.iamnop.com/particles/">http://www.iamnop.com/particles/</a> in chrome browser
Expected Result
=============
website should load within 10 seconds with good performance (~30FPS)
Actual Result
==============
Website renders with 0-1FPS. On Skylake/Broadwell it takes ~40 seconds to start
rendering. On Brasswell it takes over 2 mins to start rendering.
This looks like performance regression in mesa in later versions(12.0 etc).
With mesa 11.30.0 issue is not seen on skylake/broadwell while performance is
little better on braswell(cyan) taking ~20 seconds.
With mesa ToT issue is always seen.
Tried on above platforms on chromebooks with chromeos and arch linux.
Chrome trace indicate
BDW with mesa 12.1.0: DoLinkProgram(load stage) wall duration=33.8 seconds
BDW with mesa 11.30: DoLinkProgram(load stage) wall duration=6.8 seconds (Good
working)
Backporting to mesa 11.3 version on the same target device issue is not seen on
big core.</pre>
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