Linux 3.5 Through Linux 4.4 Kernel Benchmarks: A 19-Way Kernel Showdown Shows Some Regressions

Now onto some graphics tests for the Radeon DRM on the different kernel releases while using the same R600 Gallium3D user-space stack.

First up with the basic OpenArena game, there was a big regression in Linux 3.14 that was recovered mostly by Linux 3.15. However, to this day the frame-rates have not returned to their original levels.

With the more demanding Tesseract game it shows a regression as well that was recovered in Linux 3.15, but since Linux 3.17 the performance of this Cayman GPU has been at its lowest levels.

Xonotic with low image quality settings shows the regression as well with Linux 3.14 and since then the frame-rates haven't been quite as high as they were on Linux 3.12~3.13.

Bumping Xonotic to ultra image quality settings shows similar results with the performance as of these recent kernels not being as high as a few years back.