Re: [PATCH v3 00/11] Adjustments for preferred core detection

From: Ivan Shapovalov
Date: Wed Oct 16 2024 - 18:04:16 EST


Hi,

On my desktop Zen 3 (Vermeer) system applying this series yields a new
warning message on each boot:

> Oct 16 06:20:41 kernel: Could not retrieve highest performance (-19)

As I see it, this is one of the pr_debug()s newly promoted to warnings.
Is there anything I can provide to help fix this?

Just for completeness:

```
$ cat-files /sys/devices/system/cpu/cpufreq/policy0/*
/sys/devices/system/cpu/cpufreq/policy0/affected_cpus 0
/sys/devices/system/cpu/cpufreq/policy0/amd_pstate_highest_perf 231
/sys/devices/system/cpu/cpufreq/policy0/amd_pstate_hw_prefcore enabled
/sys/devices/system/cpu/cpufreq/policy0/amd_pstate_lowest_nonlinear_freq 1746000
/sys/devices/system/cpu/cpufreq/policy0/amd_pstate_max_freq 5274000
/sys/devices/system/cpu/cpufreq/policy0/amd_pstate_prefcore_ranking 231
/sys/devices/system/cpu/cpufreq/policy0/boost 1
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq 5274000
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_min_freq 550000
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_transition_latency 0
/sys/devices/system/cpu/cpufreq/policy0/energy_performance_available_preferences default performance balance_performance balance_power power
/sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference balance_performance
/sys/devices/system/cpu/cpufreq/policy0/related_cpus 0
/sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors performance powersave
/sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq 1746000
/sys/devices/system/cpu/cpufreq/policy0/scaling_driver amd-pstate-epp
/sys/devices/system/cpu/cpufreq/policy0/scaling_governor powersave
/sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq 5274000
/sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq 1746000
/sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed <unsupported>

$ grep -w cppc /proc/cpuinfo
<empty>
```

Thanks,
--
Ivan Shapovalov / intelfx /