AMDGPU Driver Said To Be Much Faster With Linux 4.5-rc2 Kernel

Written by Michael Larabel in Radeon on 1 February 2016 at 07:34 AM EST. 5 Comments
With Linux 4.5-rc2 that was released last night, the new AMDGPU DRM driver is supposedly much faster compared to last week's 4.5-rc1 kernel.

A Phoronix reader commented, "I read through the changelog and saw that there were several amdgpu patches. I just built this RC, rebooted, and ran some 3d benchmarks an the result is: a) double or quadruple the framerates that I got with RC1, and b) no more overheating. I have the same model R9 Fury that Michael excluded from the last round of benchmarks due to performance/stability problems."

Needless to say, after I get my coffee this morning, benchmarking 4.5-rc2 on the R9 Fury (and might as well the R9 285 again too) is first on my agenda to look for any performance improvements compared to last week's 4.5-rc1 code. The AMDGPU changes in 4.5-rc2 include:
drm/amdgpu: fix tonga smu resume
drm/amdgpu: Add some tweaks to gfx 8 soft reset
drm/amdgpu: add a message to indicate when powerplay is enabled (v2)
drm/amdgpu: don't init fbdev if we don't have any connectors
drm/amdgpu: fix amdgpu_bo_pin_restricted VRAM placing v2
drm/amdgpu: fix next_rptr handling for debugfs
drm/amd/amdgpu: Improve amdgpu_dpm* macros to avoid unexpected result (v2)
drm/amdgpu: Allow the driver to load if amdgpu.powerplay=1 on asics without powerplay support
drm/amdgpu: Use drm_calloc_large for VM page_tables array
drm/amdgpu: only move pt bos in LRU list on success
Stay tuned for my AMDGPU 4.5-rc2 test results in a few hours.
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Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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