AMDGPU Linux Gaming Tests With P-State vs. CPUFreq Scaling Drivers
Written by Michael Larabel in Radeon on 31 January 2016 at 05:51 AM EST. 6 Comments
The latest batch of open-source Linux benchmarks to share this weekend are doing some P-State and CPUFreq scaling driver benchmarks and also trying each driver's different CPU scaling governor options when using the AMD Radeon R9 285 graphics card on the AMDGPU kernel driver of Linux 4.5.

We have done CPUFreq and PState benchmarks many times. However, given how well the R9 285 Tonga is running with AMDGPU PowerPlay as of Linux 4.5, I decided to run some fresh P-State vs. CPUFreq benchmarks on Linux 4.5-rc1.

P-State powersave, P-State performance, CPUFreq ondemand, CPUFreq powersave, and CPUFreq performance were tested on this Radeon R9 285 setup. The only variable being changed between testing was the CPU scaling driver/governor. For those new here, the only reason why the CPU frequency is reported differently on the automated system table is that CPUFreq exposes the CPU clock base frequency while P-State reports the turbo boost frequency via the same sysfs file.

Head on over to this result file to see all the results from these Linux OpenGL gaming tests! The results are similar to our past CPU governor/driver comparisons. With viewing the results on, don't forget to share your thoughts on the new site that's now in beta.
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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 or contacted via

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