Ryzen Mobile Power/Performance With Linux 6.3's New AMD P-State EPP Driver

Written by Michael Larabel in Software on 12 April 2023 at 01:00 PM EDT. Page 3 of 6. 34 Comments.
VKMark benchmark with settings of Resolution: 1920 x 1200, Present Mode: Mailbox. acpi-cpufreq schedutil was the fastest.
VKMark benchmark with settings of Resolution: 1920 x 1200, Present Mode: Mailbox. acpi-cpufreq schedutil was the fastest.
VKMark benchmark with settings of Resolution: 1920 x 1200, Present Mode: Mailbox. acpi-cpufreq schedutil was the fastest.

For the VKMark Vulkan benchmark, the best performance-per-Watt on this Ryzen 7 PRO 6850U laptop was when running the classic ACPI CPUFreq driver with the scheduler utilization "schedutil" governor.

Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Medium. amd_pstate_epp powersave balance_performance was the fastest.

When it came to gaming with the open-source Unvanquished game, there was more variation between the dozen different CPU frequency scaling options available right now for AMD Rembrandt APUs.

Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: High. amd_pstate_epp performance performance was the fastest.
Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: High. amd_pstate_epp performance performance was the fastest.
Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: High. amd_pstate_epp performance performance was the fastest.
Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: High. amd_pstate_epp performance performance was the fastest.

For Unvanquished with high quality visuals, the acpi-cpufreq powersave and amd_pstate_epp powersave power modes were yielding the best performance-per-Watt.

Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultra. amd-pstate performance was the fastest.
Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultra. amd-pstate performance was the fastest.
Unvanquished benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultra. amd-pstate performance was the fastest.

With the ultra quality settings for this first person shooter, acpi-cpufreq powersave and amd_pstate_epp powersave power were yielding the best power efficiency still on this AMD Zen 3+ laptop.

Xonotic benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultimate. amd-pstate performance was the fastest.
Xonotic benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultimate. amd-pstate performance was the fastest.
Xonotic benchmark with settings of Resolution: 1920 x 1200, Effects Quality: Ultimate. amd-pstate performance was the fastest.

For the Xonotic first person shooter game the power efficiency results were closer but with a tight first place finish for acpi-cpufreq powersave.


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