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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - ring 0 stalled after bytes_moved_threshold reached - CAPVERDE/HD7770 - TAHITI/W9000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100712#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - ring 0 stalled after bytes_moved_threshold reached - CAPVERDE/HD7770 - TAHITI/W9000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100712">bug 100712</a>
from <span class="vcard"><a class="email" href="mailto:julien.isorce@gmail.com" title="Julien Isorce <julien.isorce@gmail.com>"> <span class="fn">Julien Isorce</span></a>
</span></b>
<pre>I made 2 apitrace using Zach's test mentioned here
<a class="bz_bug_link
bz_status_NEW "
title="NEW - Hard lockup with radeonsi driver on FirePro W600, W9000 and W9100"
href="show_bug.cgi?id=100465#c24">https://bugs.freedesktop.org/show_bug.cgi?id=100465#c24</a> . This test is also
good to reproduce this ring 0 stalled issue.
1: apitrace ideal for vram size 2048 (ex: HD7770)
<a href="https://drive.google.com/file/d/0Bzat_iFKrgCWYzBlZFFLQjgyRU0/view?usp=sharing">https://drive.google.com/file/d/0Bzat_iFKrgCWYzBlZFFLQjgyRU0/view?usp=sharing</a>
2: apitrace ideal for vram size 6144 (ex: W9000)
<a href="https://drive.google.com/file/d/0Bzat_iFKrgCWczgzM2FzaVFTUXc/view?usp=sharing">https://drive.google.com/file/d/0Bzat_iFKrgCWczgzM2FzaVFTUXc/view?usp=sharing</a>
DISPLAY=:0 apitrace replay thrash.trace
Also I have attached the log (dmesg_W9000_with_custom_fence_debug.log) I get
with my dev branch here
<a href="https://github.com/CapOM/linux/commits/amd-staging-4.9_add_debug_fences">https://github.com/CapOM/linux/commits/amd-staging-4.9_add_debug_fences</a> where I
added traces to debug ring N stalled issues. It prints the backtrace from where
it waits for the fence and it also prints the backtrace from where it has
emited that fence.
Also note that setting R600_DEBUG=nowc avoids this ring N stalled (so the
endless fence is signaled).</pre>
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