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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - preemption issues"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110950">110950</a>
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<th>Summary</th>
<td>preemption issues
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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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
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<th>Reporter</th>
<td>sancelot@numalliance.com
</td>
</tr>
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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
</td>
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<div>
<pre>Hi,
I am facing preemption issues related with rt preempt realtime tasks and intel
video driver with next chipsets :
* Intel J1900
* 4300 U
On heavy X11 load (eg lot of widgets creation at application startup, moving
windows, hide/show windows...) my realtime task is interrupted for about 500us
to 1ms.
My realtime task is isolated on a cpu, I suppose the problem is related to
memory access, the driver locks /access memory and my application can't access
it . (There is only a numa node available)
If I run the same graphics applications through a ssh connection the problem
has not happened.
I would like to know if there are workarounds ? and preemption status with
intel drivers.
Thanks</pre>
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