AMD APU On Linux: Gallium3D Can Be 80%+ As Fast As Catalyst

Written by Michael Larabel in Display Drivers on 30 November 2013 at 03:55 PM EST.
Radeon AMD A10-6800K APU Ubuntu Linux

Right away with Counter-Strike: Source we see the open-source Radeon Gallium3D driver almost running at 85% the speed of the AMD Catalyst binary blob when using Linux 3.13 and Mesa 10.1-devel. There are many R600 Gallium3D driver optimizations found in Mesa 10.0 in particular -- plus the Mesa 10.1-devel code over the past few weeks -- but making a big difference in the open-source driver performance is that the Linux 3.13 kernel enables Radeon Dynamic Power Management by default for most Radeon GPUs. DPM makes a very big difference for APUs since their boot clock speeds tend to be much lower compared to their rated highest-power-state frequencies, which now the Radeon DRM driver can set the hardware to operate at rather than its boot performance state.

Radeon AMD A10-6800K APU Ubuntu Linux

For Doom 3 the latest open-source driver code is a heck of a lot better than where it is "out of the box" on Ubuntu 13.10, but Catalyst was still much faster.

Radeon AMD A10-6800K APU Ubuntu Linux

With the driver code that will be found in Ubuntu 14.04 LTS for a better "out of the box" Radeon experience, the R600g driver can run at 57% the speed of Catalyst in Nexuiz.

Radeon AMD A10-6800K APU Ubuntu Linux

With the very basic OpenArena 0.8.5 game, the open-source driver is now as fast as Catalyst.


Related Articles