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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL]igt/gem_concurrent_blit subcase sporadically causes system hang and *ERROR* blitter: timed out waiting for forcewake ack to clear."
href="https://bugs.freedesktop.org/show_bug.cgi?id=89959">89959</a>
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<th>Summary</th>
<td>[SKL]igt/gem_concurrent_blit subcase sporadically causes system hang and *ERROR* blitter: timed out waiting for forcewake ack to clear.
</td>
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<th>Product</th>
<td>DRI
</td>
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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>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>critical
</td>
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<th>Priority</th>
<td>highest
</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
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=114969" name="attach_114969" title="dmesg">attachment 114969</a> <a href="attachment.cgi?id=114969&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure, We disabled it in old test.
Non-working platforms: SKL
==kernel==
--------------------------
drm-intel-nightly/333cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13
commit 333cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13
Author: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
Date: Thu Apr 2 11:38:12 2015 +0300
drm-intel-nightly: 2015y-04m-02d-08h-37m-57s UTC integration manifest
==Bug detailed description==
-----------------------------
It sporadically causes system hang and *ERROR* blitter: timed out waiting for
forcewake ack to clear. Fail rate: 1/3.
root@x-skly05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./gem_concurrent_blit --run-subtest gtt-blt-overwrite-source-read-rcs-forked
IGT-Version: 1.10-ga6c3b32 (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_333cf6_20150403+ x86_64)
using 2x512 buffers, each 1MiB
Subtest gtt-blt-overwrite-source-read-rcs-forked: SUCCESS (6.178s)
real 0m6.607s
user 0m8.217s
sys 0m9.462s
root@x-skly05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./gem_concurrent_blit --run-subtest gtt-blt-overwrite-source-read-rcs-forked
IGT-Version: 1.10-ga6c3b32 (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_333cf6_20150403+ x86_64)
using 2x512 buffers, each 1MiB
Subtest gtt-blt-overwrite-source-read-rcs-forked: SUCCESS (6.384s)
real 0m6.599s
user 0m8.126s
sys 0m9.998s
root@x-skly05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./gem_concurrent_blit --run-subtest gtt-blt-overwrite-source-read-rcs-forked
IGT-Version: 1.10-ga6c3b32 (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_333cf6_20150403+ x86_64)
using 2x512 buffers, each 1MiB
==Reproduce steps==
----------------------------
1. time ./gem_concurrent_blit --run-subtest
gtt-blt-overwrite-source-read-rcs-forked</pre>
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