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        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [HSW/IVB bisected] cairo-trace/(benchmark)swfdec-youtube.trace reduced by ~20%"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=66297">66297</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>chris@chris-wilson.co.uk
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[HSW/IVB bisected] cairo-trace/(benchmark)swfdec-youtube.trace reduced by ~20%
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>mengmeng.meng@intel.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Driver/intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>xorg
          </td>
        </tr></table>
      <p>
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        <pre>System Environment:       
----------------------------------------------
Platform:  HSW/IVB
Mesa:        (master)6aabd9490c7b71d363a384935597b3e37295e61e
Xf86_video_intel:   
(master)2.21.9-51-g62e42de300275a668a326357d454062221714fe8
Cairo:        (master)4d9439132de85c0f0f4d5b5a474ea7164910251e
Kernel:    (drm-intel-nightly) 51c5e63195eff27962be315b5c835cdc2fe034fb

Bug detailed description:
----------------------------------------------
cairo-trace/(benchmark)swfdec-youtube.trace reduced by ~20% on IVB/HSW.
It’s Xf86_video_intel regression, bisecting show the first bad commit is that:

commit 48028a7c923fa0d66b01e8e94d4f0742866f78ec
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date:   Fri Jun 21 14:29:43 2013 +0100
    sna: Inspect availablity of render before prefering to use the GPU
    Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>

Performance on IVB
---------------------------------------
                      git-48028a7         git-71fc834
swfdec-youtube.trace     0.385               0.30


Reproduce steps:
---------------------------------------------
1. xinit&
2.vblank_mode=0 CAIRO_TEST_TARGET=xlib ./cairo-perf-trace -i 12
/home/cairo-traces/benchmark/swfdec-youtube.trace</pre>
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