Debugging HyperZ and fixing a radeon drm linux kernel module
It was only a few days ago I have finished debugging a really heavy bug making as big of a mesa performance hit in the userland radeon driver that it became a news article on Phoronix. Back then while still on the heavy journey for getting my performance back I saw HyperZ was also not enabled for me, but if I enable it I gain 10-15% more performance - and an unplayable 3D screen.
On the original blog post I have also written about how to troubleshoot a performance issue generally, but what to do if you know about a performance increasing functionality - just you see it destroys the 3D picture?
Read on if you are interested in linux graphics internals once again ;-)
Tags: drm, hyperz, r300, radeon, linux, kernel, mesa, arch, 32bit, linux, debug, glitches, fix, contribute, open-source, graphics, stack, analysis, 3D, optimization, tutorial, system, internals, hackerman, opengl, zbuffer, hiz, zmask, documentation