Likely Radeon Gallium3D Regression On Linux 3.14 + Mesa 10.2
With the GpuTest OpenGL test-cases the results were mixed but for several of the graphics cards and workloads encountered, the newer code was slower than the current stable state.
Stay tuned for additional testing next week and if you've encountered similar findings or have other information to share, feel free to share it in the forums.
If you enjoyed this article consider joining Phoronix Premium to view this site ad-free, multi-page articles on a single page, and other benefits. PayPal or Stripe tips are also graciously accepted. Thanks for your support.