[Bug 791093] add OMX_PERFORMANCE debug category

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=791093

Guillaume Desmottes <gdesmott at gnome.org> changed:

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--- Comment #6 from Guillaume Desmottes <gdesmott at gnome.org> ---
Created attachment 367578
  --> https://bugzilla.gnome.org/attachment.cgi?id=367578&action=edit
add OMX_PERFORMANCE debug category

Can be used to log buffers exchange between OMX and gst-omx to profile
performances of the OMX component.
Ideally this should be done using tracer hooks but it's currently not
possible to define custom hooks outside of core.

Use GST_DEBUG="OMX_PERFORMANCE:8" to enable it.
See also
https://github.com/gdesmott/gst-log-parser/blob/master/src/bin/omx-perf.rs
as a simple program consuming those logs to generate gnuplot files and
stats.

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