https://bugs.freedesktop.org/show_bug.cgi?id=95474
--- Comment #11 from Marek Olšák maraeo@gmail.com --- CPU profiling is usable only if you've built Mesa and LLVM with -fno-omit-frame-pointer.
This article suggests that the regression happened between 11.2 and master. Do you disagree with that? http://www.phoronix.com/scan.php?page=news_item&px=RadeonSI-Padoka-May-U...