amd-pstate: Frequency wrongly reported
Closed this issue · 14 comments
i am using 6.9.2-1-cachyos with amd-pstate(passive) on Ryzen 5 5500u. In any cpu governor the cpu freq is sticking with 400mhz and sometimes going below 200mhz. the entire system is completely slow.
i am using 6.9.2-1-cachyos with amd-pstate(passive) on Ryzen 5 5500u. In any cpu governor the cpu freq is sticking with 400mhz and sometimes going below 200mhz. the entire system is completely slow.
Does this also happen on amd-pstate active?
Actually, we just did a little push for amd-pstate-epp memory leak for the 6.9 Kernel, besides that there is no difference to 6.9.1.
Is that issue also present on 6.9.1?
Used branch:
https://github.com/CachyOS/linux/commits/6.9/amd-pstate-stable/
cc: @superm1
Edit: ignore the last patch in the above mentioned branch. This is currently not included in the 6.9.2 kernel.
the amd-pstate active is working fine as normal. the passive is the problem
Could you please test following kernel?
sudo pacman -U https://archive.cachyos.org/kernel/linux-cachyos-6.9.2-1-x86_64_v3.pkg.tar.zst https://archive.cachyos.org/kernel/linux-cachyos-headers-6.9.2-1-x86_64_v3.pkg.tar.zst
If you have a nvidia card, aditonally also:
sudo pacman -U https://archive.cachyos.org/kernel/linux-cachyos-nvidia-6.9.2-1-x86_64_v3.pkg.tar.zst
This contains additonally following patch:
CachyOS/linux@5c16723
If it doesn't help, we need to start bisecting.
Totally agree on the suggested patch. If that doesn't help the Fast CPPC patch series is the next thing to try.
Could you please test following kernel?
sudo pacman -U https://archive.cachyos.org/kernel/linux-cachyos-6.9.2-1-x86_64_v3.pkg.tar.zst https://archive.cachyos.org/kernel/linux-cachyos-headers-6.9.2-1-x86_64_v3.pkg.tar.zstIf you have a nvidia card, aditonally also:
sudo pacman -U https://archive.cachyos.org/kernel/linux-cachyos-nvidia-6.9.2-1-x86_64_v3.pkg.tar.zstThis contains additonally following patch: CachyOS/linux@5c16723
If it doesn't help, we need to start bisecting.
this kernel works as expected
Thanks! Glad to hear. Ive queued it for the next revision.
@superm1 Maybe CC the patchset to stable (if it not already happened)
It's got a fixes tag, it should go back.
but it would be helpful to respond to it publicly with a Tested-by tag. Here's the Lore URL:
https://lore.kernel.org/linux-pm/20240527051128.110091-1-Dhananjay.Ugwekar@amd.com/
Very good.
@jothi-prasath Do you know how to send mail to the kernel mailing list? Otherwise I would send it.
In schedutil the cpufreq not touching the 400mhz but in ondemand it touches 400mhz. Is that normal?
Posed on the lkml mail thread tested by.
Actually, sorry for the failed quoting. Hope its fine.
Fixed with cd66bf5
Should land in the next hours into the repository. Thanks for reporting!
In schedutil the cpufreq not touching the 400mhz but in ondemand it touches 400mhz. Is that normal?
In schedutil the cpufreq not touching the 400mhz but in ondemand it touches 400mhz. Is that normal?
Hi Jothi,
We are actually not modifying the behaviour of schedutil. Schedutil handles the frequency depending on the scheduler input (in an easy explaination), so I would guess this is working as intended.
amd-pstate-guided does offer a bit better schedutil performance. Maybe check their if it does downscale.