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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [SNB][IVB][BAT] kms_cursor_legacy@basic-busy-flip-before-cursor-atomic fails in CI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100215#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [SNB][IVB][BAT] kms_cursor_legacy@basic-busy-flip-before-cursor-atomic fails in CI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100215">bug 100215</a>
from <span class="vcard"><a class="email" href="mailto:bugs@mblankhorst.nl" title="Maarten Lankhorst <bugs@mblankhorst.nl>"> <span class="fn">Maarten Lankhorst</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=131460" name="attach_131460" title="ftrace, weird vblank timings">attachment 131460</a> <a href="attachment.cgi?id=131460&action=edit" title="ftrace, weird vblank timings">[details]</a></span>
ftrace, weird vblank timings
In this ftrace the difference in basic-busy-flip-before-cursor-legacy between
vblank_start and the get_vblank() at the end is 3, while 1 is expected.
The timing of calls to drm_handle_vblank looks wrong. They should be 16.7ms
apart, but it doesn't look to be the case here. After the read() it's called 3
times in a row, only 1 ms apart.</pre>
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