AMD Ryzen, EPYC 5~6% Faster Out-Of-The-Box With Linux 5.11 - Phoronix
Now with the CPUFreq fix landing this week in Linux Git, the mainline Linux 5.11 kernel in its near final state is looking in very good shape for AMD Zen 2/3 hardware from Ryzen laptops and desktops through EPYC servers. The Linux 5.11 development kernel was regressed for the better part of the past two months but now that the frequency invariance regression is addressed, not only is the regression gone but generally is performing much better compared to prior kernel versions.
Continuing in the array of benchmarks since December when first encountering the regression on Zen 2 / Zen 3 when using the default Schedutil governor, here are my final benchmarks looking at the AMD Linux 5.11 performance now that the fix by way of the mentioned CPUFreq change landed this week and Linux 5.11 stable should be out on Sunday.
On the desktop side I ran some fresh Linux kernel benchmarks with the Ryzen 9 5900X desktop at stock speeds, ASUS ROG CROSSHAIR VIII HERO motherboard, 2 x 8GB DDR4-3600 memory, 1TB Samsung 980 PRO NVMe SSD, and Radeon RX 5600 XT graphics. From the Ubuntu 20.10 installation I tested Linux 5.9.16, Linux 5.10.12, and Linux 5.11 Git as the three latest stable kernel series at the time. The Ubuntu Mainline Kernel PPA was used for fetching these vanilla kernel builds in an easily reproducible manner. The default CPUFreq governor on the recent kernels for AMD hardware is Schedutil.
