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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BAT BDW] gem_sync / basic-store-each fails sporadically"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=96974">96974</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BAT BDW] gem_sync / basic-store-each fails sporadically
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>DRI 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>critical
          </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>ville.syrjala@linux.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>
      <p>
        <div>
        <pre>Happens on ro-bdw-i7-5600u, maybe 1/3 of the time based on the CI long term
history page.

 Stdout         

IGT-Version: 1.15-g36ffa37 (x86_64) (Linux:
4.7.0-rc6-gfxbench-RO_Patchwork_1484+ x86_64)
bsd completed 31744 cycles: 316.057 us
vebox completed 15360 cycles: 654.773 us
render completed 29696 cycles: 339.167 us
blt completed 24576 cycles: 445.771 us
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [store_ring+0x57b]
  #2 [__real_main692+0x46c]
  #3 [main+0x23]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest basic-store-each: FAIL (10.965s)

Stderr  

(gem_sync:5897) CRITICAL: Test assertion failure function store_ring, file
gem_sync.c:281:
(gem_sync:5897) CRITICAL: Failed assertion:
intel_detect_and_clear_missed_interrupts(fd) == 0
(gem_sync:5897) CRITICAL: error: 18 != 0
Subtest basic-store-each failed.
**** DEBUG ****
(gem_sync:5897) CRITICAL: Test assertion failure function store_ring, file
gem_sync.c:281:
(gem_sync:5897) CRITICAL: Failed assertion:
intel_detect_and_clear_missed_interrupts(fd) == 0
(gem_sync:5897) CRITICAL: error: 18 != 0
****  END  ****

Environment     

PIGLIT_SOURCE_DIR="/opt/igt/piglit" PIGLIT_PLATFORM="mixed_glx_egl"

Command         /opt/igt/tests/gem_sync --run-subtest basic-store-each
dmesg   

[   84.728418] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer
elapsed... video enhancement ring idle</pre>
        </div>
      </p>


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