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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW Bisected] OglBatch7 performance reduced by ~7% after enable execlists"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87725">87725</a>
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<th>Summary</th>
<td>[BDW Bisected] OglBatch7 performance reduced by ~7% after enable execlists
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>wendy.wang@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=111341" name="attach_111341" title="dmesg file">attachment 111341</a> <a href="attachment.cgi?id=111341&action=edit" title="dmesg file">[details]</a></span>
dmesg file
Environment:
-----------------------------------
Platform: BDW
Libdrm:
(master)libdrm-2.4.58-19-gf99522e678dbbaffeca9462a8edcbe900574dc12
Mesa:
(master)ff9653775962ab661c4891721b1b93d077d1f2db
Xserver:
(master)xorg-server-1.16.99.901-85-g91651e7c15892aa846fc406fbb13b37f094dd3f0
Xf86_video_intel:
(master)2.99.916-172-g04a09d353fc5ad8a55eb2457dc8bb43638ba879e
Cairo:
(master)4a225fca5f121c31ddaa0af80a13bf95a7f21a5b
Libva:
(master)cdfd3d50d80c092ca3ae8914418be628d5a80832
Libva_intel_driver:
(master)f2a34f94c57e1f7ce975b2068fb087df84b92e3a
Kernel: (drm-intel-nightly)a243fbbcfd348ec042b100f3ce02f215252d177d
Bug detailed description:
---------------------------------------------
OglBatch7 performance reduced by ~7% after enable execlists
Bisect drm-intel-next-queued kernel branch, the first bad commit is:
27401d126b5b1c8dd4df98bbb60b09ff2b3d5e60
Author: Thomas Daniel <<a href="mailto:thomas.daniel@intel.com">thomas.daniel@intel.com</a>>
Date: Thu Dec 11 12:48:35 2014 +0000
drm/i915/bdw: Enable execlists by default where supported
Execlist support in the i915 driver is now considered good enough for the
feature to be enabled by default on Gen8 and later and routinely tested.
Adjusted i915 parameters structure initialization to reflect this and
updated
the comment in intel_sanitize_enable_execlists().
There's still work to do before we can let the wider massive onto it,
but there's still time left before the 3.20 cutoff.
v2: Update the MODULE_PARM_DESC too.
Issue: VIZ-2020
Signed-off-by: Thomas Daniel <<a href="mailto:thomas.daniel@intel.com">thomas.daniel@intel.com</a>>
[danvet: Add note that there's still some work left to do.]
Signed-off-by: Daniel Vetter <a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>
Reproduce steps:
---------------------------------------------
1, xinit &
2, cd /usr/local/games/OpenGL/SynMark2_6
3. ./synmark2 OglBatch7
Dmesg file have been attached.</pre>
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