[Bug 93865] New: debugfs: expose fifo pipe underrun, overrun counts
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Mon Jan 25 13:52:27 PST 2016
https://bugs.freedesktop.org/show_bug.cgi?id=93865
Bug ID: 93865
Summary: debugfs: expose fifo pipe underrun, overrun counts
Product: DRI
Version: DRI git
Hardware: All
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: joe.konno at linux.intel.com
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
I believe a mechanism for counting pipe [under,over]runs would be useful during
debug.
If, during a particular workload, you consistently see X pipe underruns, and
then apply a patch and see "10% less" pipe underruns, you can say you've
progressed or regressed.
Propose adding a quick counter every vsync. I'll post an RFC patch today or
tomorrow.
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