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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [HSW GT1] trying to flip between 2 buffers of different strides"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=88716">88716</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[HSW GT1] trying to flip between 2 buffers of different strides
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>XOrg git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

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

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

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>myfoolishgames@gmail.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>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=112675" name="attach_112675" title="20150122_fifo_just_slowdown.log">attachment 112675</a> <a href="attachment.cgi?id=112675&action=edit" title="20150122_fifo_just_slowdown.log">[details]</a></span>
20150122_fifo_just_slowdown.log

I'm experiencing slowdowns of the system usually on heavy usage of Chromium
(running another app that use the GPU like Kodi or image editor will hasten the
appearance of the slowdowns).
The easiest way to reproduce is to open few tabs with allot of images.

Although before 3.19 I had GPU hangs (
<a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [HSW gt1] GPU HANG: ecode 0:0x87d3bffa on ctx load"
   href="show_bug.cgi?id=83677">https://bugs.freedesktop.org/show_bug.cgi?id=83677</a> ) I did still encountered
the slowdowns when using i915 kernel parameters to suppress the hangs so at
least for me it's not a regression (at least from kernel 3.15).

system: Acer C720, Haswell GT1, 2995U
kernel: 3.19rc5
xf86-video-intel: 2.99.916
mesa: 10.4.2
xorg-server: 1.16.3
distro: Arch Linux x86_64

attached logs:
20150122_fifo_just_slowdown.log: journald output for the time frame of the
slowdown
20150122_fifo.log : full journald output
20150122_Xorg.0.log: Xorg.0.log</pre>
        </div>
      </p>
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