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    <body><span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78274">bug 78274</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>RESOLVED
           </td>
           <td>REOPENED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>FIXED
           </td>
           <td>---
           </td>
         </tr></table>
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        <div>
            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78274#c15">Comment # 15</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78274">bug 78274</a>
              from <span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span></b>
        <pre>It still happens on latest -nightly kernel(2be456541ea41).
run ./gem_exec_nop --run-subtest render
output:
Time to exec x 1:                99.000µs (ring=render)
Time to exec x 2:                79.500µs (ring=render)
Time to exec x 4:                42.750µs (ring=render)
Time to exec x 8:                24.125µs (ring=render)
Time to exec x 16:               13.625µs (ring=render)
Time to exec x 32:                9.594µs (ring=render)
Time to exec x 64:                6.469µs (ring=render)
Time to exec x 128:               5.188µs (ring=render)
Time to exec x 256:               4.824µs (ring=render)</pre>
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