Ryzen 9 7950X Performance With The New AMD P-State Default Of Linux 6.5

Written by Michael Larabel in Software on 24 August 2023 at 02:47 PM EDT. Page 4 of 4. 20 Comments.
WireGuard + Linux Networking Stack Stress Test benchmark with settings of . Linux 6.5 Git was the fastest.
WireGuard + Linux Networking Stack Stress Test benchmark with settings of . Linux 6.5 Git was the fastest.

In some workloads were very minor changes in performance with Linux 6.5.

OSPRay benchmark with settings of Benchmark: particle_volume/pathtracer/real_time. Linux 6.5 Git was the fastest.
OSPRay benchmark with settings of Benchmark: particle_volume/pathtracer/real_time. Linux 6.5 Git was the fastest.
OSPRay benchmark with settings of Benchmark: particle_volume/pathtracer/real_time. Linux 6.5 Git was the fastest.

In other select workloads like real-time path-tracing with OSPRay there was a bump in performance when using Linux 6.5.

SVT-AV1 benchmark with settings of Encoder Mode: Preset 13, Input: Bosphorus 4K. Linux 6.5 Git was the fastest.
SVT-AV1 benchmark with settings of Encoder Mode: Preset 12, Input: Bosphorus 4K. Linux 6.5 Git was the fastest.
SVT-AV1 benchmark with settings of Encoder Mode: Preset 12, Input: Bosphorus 4K. Linux 6.5 Git was the fastest.
SVT-AV1 benchmark with settings of Encoder Mode: Preset 12, Input: Bosphorus 4K. Linux 6.5 Git was the fastest.
uvg266 benchmark with settings of Video Input: Bosphorus 1080p, Video Preset: Very Fast. Linux 6.5 Git was the fastest.
uvg266 benchmark with settings of Video Input: Bosphorus 1080p, Video Preset: Ultra Fast. Linux 6.5 Git was the fastest.
VVenC benchmark with settings of Video Input: Bosphorus 1080p, Video Preset: Fast. Linux 6.5 Git was the fastest.

In some of the video encoding benchmarks there were slight improvements to the video encode speed and power efficiency when the Ryzen 9 7950X desktop was using Linux 6.5 with its new AMD P-State EPP default in powersave mode.

x265 benchmark with settings of Video Input: Bosphorus 1080p. Linux 6.5 Git was the fastest.
x265 benchmark with settings of Video Input: Bosphorus 1080p. Linux 6.5 Git was the fastest.
x265 benchmark with settings of Video Input: Bosphorus 1080p. Linux 6.5 Git was the fastest.

The x265 encoder with 1080p content saw one of the largest shifts in performance when upgrading to Linux 6.5.

Geometric Mean Of All Test Results benchmark with settings of Result Composite, Linux 6.5 AMD Ryzen 9 7950X. Linux 6.5 Git was the fastest.

On the whole the performance difference across the span of 62 benchmarks I ended up running there didn't end up being many dramatic shifts from Linux 6.5 with the out-of-the-box change from ACPI CPUFreq schedutil to AMD P-State EPP powersave. But as shown in this article with some of the affected results, areas like web browser (Firefox and Chrome) as well as video encoding are some of the areas where there can be better performance and power efficiency for AMD Ryzen desktop systems with Linux 6.5. Those using Linux 6.3+ currently can also already make use of the AMD P-State driver with amd_pstate=active. But besides this default change there are also many other features of Linux 6.5, which if all goes well will debut as stable on Sunday, 27 August.

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Michael Larabel

Michael Larabel is the principal author of Phoronix.com 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.