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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - RT cpu starvation due to driver threads or memory access"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110950">bug 110950</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Summary</td>
<td>preemption issues
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<td>RT cpu starvation due to driver threads or memory access
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - RT cpu starvation due to driver threads or memory access"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110950#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - RT cpu starvation due to driver threads or memory access"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110950">bug 110950</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>I don't suppose you have a handy recipe for setting up a machine with an
isolated RT CPU?
<a href="https://gitlab.freedesktop.org/drm/igt-gpu-tools/blob/master/benchmarks/gem_syslatency.c">https://gitlab.freedesktop.org/drm/igt-gpu-tools/blob/master/benchmarks/gem_syslatency.c</a>
is a tool we use to try and assess the damage we cause to the system by
measuring the latency of an RT thread. But I've never before setup an isolated
cpu...
Just to check, do you mean the cpu isolation feature in the kernel, or are just
using cpuset?
And also to confirm you are talking about CPU preemption and not GPU
preeemption?</pre>
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