https://bugs.freedesktop.org/show_bug.cgi?id=82050
--- Comment #73 from Michel Dänzer michel@daenzer.net --- (In reply to Andy Furniss from comment #67)
In summary AIUI the fact there is a pause causes a spike because the count is from the last frame rendered - which is way longer than normal due to the pause.
Still, it means that *some* BOs were moved during the pause, so it's not impossible that the pause is somehow related to the BO moves.
BTW, make sure CONFIG_CMA isn't enabled in your kernels, in particular those using Ubuntu.
(In reply to smoki from comment #68)
Offtopic...
Please don't clutter up bug reports with off-topic comments.