CONFIG_X86_AMD_FREQ_SENSITIVITY: AMD frequency sensitivity feedback powersave bias

General informations

The Linux kernel configuration item CONFIG_X86_AMD_FREQ_SENSITIVITY:

• prompt: AMD frequency sensitivity feedback powersave bias
• type: tristate
• depends on: CONFIG_CPU_FREQ_GOV_ONDEMAND && CONFIG_X86_ACPI_CPUFREQ && CONFIG_CPU_SUP_AMD
• defined in drivers/cpufreq/Kconfig.x86
• found in Linux kernels: 3.10–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.13
• modules built: amd_freq_sensitivity

Help text

This adds AMD-specific powersave bias function to the ondemand governor, which allows it to make more power-conscious frequency change decisions based on feedback from hardware (available on AMD Family 16h and above).

Hardware feedback tells software how "sensitive" to frequency changes the CPUs' workloads are. CPU-bound workloads will be more sensitive -- they will perform better as frequency increases. Memory/IO-bound workloads will be less sensitive -- they will not necessarily perform better as frequency increases.

If in doubt, say N.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module amd_freq_sensitivity CONFIG_X86_AMD_FREQ_SENSITIVITY : drivers/cpufreq/Kconfig.x86 : "AMD frequency sensitivity feedback powersave bias" # in 3.10–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.13

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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