Translations:Power management/Processor/13/en
From Gentoo Wiki
| Option | Module / Kernel symbol | Supported Processors | Note |
|---|---|---|---|
| Intel P state control | intel_pstate (CONFIG_X86_INTEL_PSTATE) | recent (Sandy Bridge+) Intel Core | Implements an internal scaling governor. Shows itself as intel_cpufreq on Intel processors lacking Hardware P-States (HWP) (hwp CPU flag) support.[1]
|
| AMD Processor P-State driver[2] | amd-pstate (X86_AMD_PSTATE). | AMD Zen 2 and newer | Provides more fine grained frequency steps compared to the standard acpi-cpufreq driver.[2] Shows itself as amd_pstate_epp when its internal scaling governor implementation is active. Requires kernel v5.17 and above. |
| ACPI Processor P-States driver | acpi-cpufreq (CONFIG_X86_ACPI_CPUFREQ) | AMD Zen 1-based EPYC/Ryzen, older Intel Core (pre-Sandy Bridge)/Xeon, AMD Opteron/Phenom, Intel Atom, Intel Pentium M | Acts as a generic CPUFreq driver. Utilizes ACPI Performance States. Note, for AMD processors it is limited to only 3 frequency steps unlike amd-pstate.[2] |
| AMD Opteron/Athlon64 PowerNow! | powernow-k8 (CONFIG_X86_POWERNOW_K8) | K8-based AMD Opteron, AMD Athlon 64, AMD Turion 64 | Supports older AMD K8-based processors. |
| Intel Enhanced SpeedStep (deprecated) | speedstep-centrino (CONFIG_X86_SPEEDSTEP_CENTRINO) | Intel Pentium M (Centrino)/Xeon | Deprecated, use ACPI Processor P-States driver instead. |
| Intel Pentium 4 clock modulation | p4-clockmod (CONFIG_X86_P4_CLOCKMOD) | Intel Pentium 4/Xeon | Not recommended - causes severe slowdowns and noticeable latency. |
| Processor Clocking Control interface driver | pcc-cpufreq (CONFIG_X86_PCC_CPUFREQ) | x86 processors supporting the Processor Clocking Control (PCC) interface | Adds support for the PCC interface. Might be useful for HP servers supporting the interface.[3] |
- ↑ intel_pstate CPU Performance Scaling Driver, kernel.org, Rafael J. Wysocki. Retrieved 12 January 2022.
- ↑ 2.0 2.1 2.2 amd-pstate CPU Performance Scaling Driver, The kernel development community. Retrieved 9 September 2023.
- ↑ Platform-based Power Management and Linux, Bdale Garbee and Naga Chumbalkar. Retrieved 9 September 2023.