Help Enabling AMD Pstate Scaling Driver on Proxmox 8.1.4 under a Ryzen 3700X?

[SInisterPisces]

Hello,

I finally had time to poke around my power management settings, and it seems I'm not running the AMD Pstate Scaling Driver, but rather the fallback ACPI driver.
I'm running an AMD Ryzen 3700X in eco mode, and since this is a home server and I'm really not doing anything terribly demanding, I want to optimize power draw as much as possible.

Here's what I'm seeing right now.
I'm aware that I need to enable AMD pstate support in my BIOS. I'm looking into that separately.

# pveversion
pve-manager/8.1.4/ec5affc9e41f1d79 (running kernel: 6.5.13-1-pve)

# cat /boot/config-6.5.13-1-pve | grep -i PSTATE
CONFIG_X86_INTEL_PSTATE=y
CONFIG_X86_AMD_PSTATE=y
CONFIG_X86_AMD_PSTATE_DEFAULT_MODE=3
# CONFIG_X86_AMD_PSTATE_UT is not set

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
acpi-cpufreq

What's the minimum required change to the boot config to enable this?

 

[leesteken]

What's the minimum required change to the boot config to enable this?

I just use amd_pstate=guided but =active or =passive is also allowed. Make sure to enable all CPPC options in the motherboard BIOS. There is a thread about this on this forum: https://forum.proxmox.com/threads/amd-pstate-driver-steps-and-discussion.118873/post-515542

 

[SInisterPisces]

I just use amd_pstate=guided but =active or =passive is also allowed. Make sure to enable all CPPC options in the motherboard BIOS. There is a thread about this on this forum: https://forum.proxmox.com/threads/amd-pstate-driver-steps-and-discussion.118873/post-515542

Thanks for the help. I'll check out that thread, too.

I think my 3700X is too old to use the newer EPP driver (the active setting), but I can still use passive or guided, I think.