AMD Rembrandt CPUFreq vs. AMD P-State Linux Testing

Written by Michael Larabel in Software on 3 October 2022 at 11:30 AM EDT. Page 4 of 6. 18 Comments.

For the developers out there, here are some code compilation benchmarks with this Lenovo ThinkPad X13 Gen3 powered by the Ryzen 7 PRO 6850U.

Rembrandt CPUFreq vs. P-State

The amd-pstate schedutil configuration again was the outlier with delivering much lower performance than the rest...

Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State

Though if wanting to extend your battery life, the amd-pstate schedutil had an average battery power draw while compiling the kernel of 16.5 Watts compared to 24 Watts with the other configurations. A 23% longer build time for a 32% reduction in battery power use.

Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State

Surprisingly with the Godot and Mesa timed compilation benchmarks, amd-pstate schedutil matched the leading performance of amd-pstate with the performance governor.

Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State
Rembrandt CPUFreq vs. P-State

For some Node.js testing from the laptop, using the amd-pstate performance and acpi-cpufreq schedutil governors was leading to the best performance-per-Watt.


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