AMDGPU Linux 4.5 DRM Tuning Tests With DRI2/DRI3, PowerPlay, Semaphores, Scheduler

Under Team Fortress 2, enabling semaphores hurt the performance as did disabling the GPU scheduler.

With the open-source Xonotic game, the performance rose when switching from DRI2 to DRI3. It also looks like Xonotic benefited slightly from the enabling of semaphores. When the scheduler was disabled, the performance dropped as expected.

If you've been curious about these different AMDGPU tunables, hopefully this article shed some light on their OpenGL performance impact. If you missed yesterday's AMDGPU vs. proprietary driver comparison, you can read it here.