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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/gem_pwrite_pread sporadically causes *ERROR* Hangcheck timer elapsed... blitter ring idle"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87733">87733</a>
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<tr>
<th>Summary</th>
<td>[BSW]igt/gem_pwrite_pread sporadically causes *ERROR* Hangcheck timer elapsed... blitter ring idle
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=111354" name="attach_111354" title="dmesg">attachment 111354</a> <a href="attachment.cgi?id=111354&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
on-working platforms: BSW
==kernel==
--------------------------
drm-intel-next-queued/140fd38dc4962ae3694f81900b51c567df1b6d33
==Bug detailed description==
-----------------------------
It sporadically causes <3>[ 118.756567] [drm:i915_hangcheck_elapsed [i915]]
*ERROR* Hangcheck timer elapsed... blitter ring idle. Fail rate: 1/5
output:
IGT-Version: 1.9-geb799b2 (x86_64) (Linux:
3.18.0-rc7_drm-intel-next-queued_140fd3_20141226+ x86_64)
** mmap snooped copy 16384 bytes x 1: 418.000µs, 39.2MiB/s
** mmap snooped copy 16384 bytes x 2: 181.500µs, 90.3MiB/s
** mmap snooped copy 16384 bytes x 4: 117.250µs, 139.7MiB/s
** mmap snooped copy 16384 bytes x 8: 85.000µs, 192.8MiB/s
** mmap snooped copy 16384 bytes x 16: 90.688µs, 180.7MiB/s
** mmap snooped copy 16384 bytes x 32: 84.469µs, 194.0MiB/s
** mmap snooped copy 16384 bytes x 64: 84.125µs, 194.8MiB/s
** mmap snooped copy 16384 bytes x 128: 86.250µs, 190.0MiB/s
** mmap snooped copy 16384 bytes x 256: 85.594µs, 191.4MiB/s
** mmap snooped copy 16384 bytes x 512: 83.424µs, 196.4MiB/s
** mmap snooped copy 16384 bytes x 1024: 84.175µs, 194.6MiB/s
** mmap snooped copy 16384 bytes x 2048: 85.220µs, 192.3MiB/s
** mmap snooped copy 16384 bytes x 4096: 78.558µs, 208.6MiB/s
** mmap snooped copy 16384 bytes x 8192: 89.401µs, 183.3MiB/s
** mmap snooped copy 16384 bytes x 16384: 83.158µs, 197.0MiB/s
** mmap snooped copy 16384 bytes x 32768: 81.299µs, 201.5MiB/s
** mmap snooped copy 16384 bytes x 65536: 76.108µs, 215.3MiB/s
** mmap snooped copy 16384 bytes x 131072: 100.904µs, 162.4MiB/s
Subtest snooped-pwrite-blt-cpu_mmap-performance: SUCCESS (23.644s)
==Reproduce steps==
----------------------------
1. ./gem_pwrite_pread --run-subtest snooped-pwrite-blt-cpu_mmap-performance</pre>
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