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

Written by Michael Larabel in Display Drivers on 24 December 2015 at 11:30 AM EST. Page 2 of 3. 8 Comments.
Radeon AMDGPU Module Parameter Tests

As has been shown already, PowerPlay has the largest impact on performance for the GCN 1.2+ cards supported by AMDGPU. Without PowerPlay, the AMDGPU discrete graphics cards have been limited to running at their boot clock frequencies rather than being able to re-clock to their highest performance states.

Radeon AMDGPU Module Parameter Tests

For the other tuning tests on the R9 285, these options didn't have much of an impact on the Metro Redux games.

Radeon AMDGPU Module Parameter Tests

There wasn't much to see either out of OpenArena.

Radeon AMDGPU Module Parameter Tests

With Tesseract we see that enabling semaphores increased the performance for this open-source game. Also, when the AMDGPU scheduler was disabled, the performance dropped quite noticeably.


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