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

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Message-ID: <3b2195074d7c8fa20f93f1dc6fc25afe5dbb2909.camel@intelfx.name>
Date: Thu, 17 Oct 2024 02:03:52 +0400
From: Ivan Shapovalov <intelfx@...elfx.name>
To: Mario Limonciello <superm1@...nel.org>
Cc: bp@...en8.de, gautham.shenoy@....com, linux-acpi@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
	mario.limonciello@....com, perry.yuan@....com, rafael@...nel.org,
 x86@...nel.org
Subject: Re: [PATCH v3 00/11] Adjustments for preferred core detection

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 /