Re: [Bug 211305] schedutil selects low P-States on AMD EPYC with frequency invariance
From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: 2021-02-12 18:21:05
On Fri, Feb 12, 2021 at 6:29 PM [off-list ref] wrote:
quoted hunk ↗ jump to hunk
https://bugzilla.kernel.org/show_bug.cgi?id=211305 Matt McDonald (gardotd426@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |gardotd426@gmail.com--- Comment #6 from Matt McDonald (gardotd426@gmail.com) ---So, the replacement patch from Rafael causes Zen 3 frequency reporting to be ALL jacked up. Before the patch, core frequencies in /proc/cpuinfo as well as using tools like nmon seemed accurate. After testing Rafael's patch, my core frequencies are all up around 6 GHz (!), and even external tools like Geekbench report my 5800X's BASE clock as 6.0 GHz (https://browser.geekbench.com/v5/cpu/6466982) I'm sure this isn't intended behavior.
If the reported frequencies are like that all the time, then it isn't. What is there in scaling_cur_freq in sysfs if the system is idle?
The patch was merged like yesterday into the mainline kernel, so should I file an actual bug report?
It doesn't particularly matter, because I have seen this comment from you.