[Bug 217931] New: amd-pstate lacks crucial features: CPU frequency and boost control

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217931

            Bug ID: 217931
           Summary: amd-pstate lacks crucial features: CPU frequency and
                    boost control
           Product: Power Management
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: high
          Priority: P3
         Component: cpufreq
          Assignee: linux-pm@vger.kernel.org
          Reporter: aros@gmx.com
        Regression: No

Created attachment 305131
  --> https://bugzilla.kernel.org/attachment.cgi?id=305131&action=edit
Power Options: Processor Power Management in Windows

It would be really great if amd-pstate had a feature parity with acpi-cpufreq,
namely

1) Being able to set operating frequencies (maximum, minimum and user-defined)

2) Being able to enable/disable boost

Currently both features are not available and frequency control is simply
ignored (bug 215800).

Rationale:

1) This is required for benchmarking and proper temperature control. Boost
frequencies are subject to multiple limitations (power in watts, amperage,
voltage, temperature, BIOS limitations) and can change depending on the
workload. Setting a low enough frequency allows to run benchmarks in the
controlled environment and get proper data.

Windows allows to do that easily, see the attached screenshot.

2) Disabling boost is an easy option to subdue operating temperatures though if
the previous issue is tackled, it's not really needed.

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