<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <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 ULT bisected] Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10%."
   href="https://bugs.freedesktop.org/show_bug.cgi?id=67062">67062</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>[HSW ULT bisected] Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10%.
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-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>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>yex.tian@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>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>System Environment:       
----------------------------------------------
Platform: HSW ULT 
Libdrm:    (master)libdrm-2.4.46-2-gfea5408098c3c3057958e85ea9d7146f0b08749e
Mesa:    (master)148f0deb065d8b64e15f951063fac40650ac257a
Xserver:   
(master)xorg-server-1.14.99.1-137-g74469895e39fa38337f59edd64c4031ab9bb51d8
Xf86_video_intel:(master)2.21.12-12-g6c8b15d321044d4a81cb187cc5e1ac094eb82367
Cairo:    (master)03c81d414d4edb710c91f96ddb7dbf73e5432583
Libva:    (staging)6ba83cd306629e7579912627edab7a86d8c9ae1c
Libva_intel_driver: (staging)1caf179b1425b13cacaa421c688c6df8369668c6
Kernel:    (drm-intel-next-queued)8f588cfc349bbbd8ae62a13679b9efba41645064

Bug detailed description:
----------------------------------------------
Glbenchmark2.7.0 Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10% on
HSW ULT.
The problem doesn’t exist on HSW desktop and IVB. please see dmesg and Xorg.0
attached.
It's Kernel(-intel-next-queued) regression. By bisected, show that 0d8ff15e9 is
the first bad commit.

commit 0d8ff15e9a15f2b393e53337a107b7a1e5919b6d
Author: Ben Widawsky <<a href="mailto:benjamin.widawsky@intel.com">benjamin.widawsky@intel.com</a>>
Date:   Thu Jul 4 11:02:03 2013 -0700

drm/i915/hsw: Set correct Haswell PTE encodings.

Performance
----------------------------------------------
                                             50b44a4   0d8ff1
EgyptHD_C24Z16_FixedTime_Offscreen              96       86 
TRex_C24Z16_FixedTimeStep_Offscreen             56       50

Reproduce steps:
---------------------------------------------
1, xinit&
2, vblank_mode=0 ./GLBenchmark -data ../../data/  -w 1920 -h 1080 -t 2701101</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the QA Contact for the bug.</li>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>