diff options
Diffstat (limited to 'Documentation/admin-guide/pm')
| -rw-r--r-- | Documentation/admin-guide/pm/amd-pstate.rst | 18 | ||||
| -rw-r--r-- | Documentation/admin-guide/pm/cpufreq.rst | 4 |
2 files changed, 21 insertions, 1 deletions
diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 1e0d101b020a..d0324d44f548 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -281,6 +281,22 @@ integer values defined between 0 to 255 when EPP feature is enabled by platform firmware, if EPP feature is disabled, driver will ignore the written value This attribute is read-write. +``boost`` +The `boost` sysfs attribute provides control over the CPU core +performance boost, allowing users to manage the maximum frequency limitation +of the CPU. This attribute can be used to enable or disable the boost feature +on individual CPUs. + +When the boost feature is enabled, the CPU can dynamically increase its frequency +beyond the base frequency, providing enhanced performance for demanding workloads. +On the other hand, disabling the boost feature restricts the CPU to operate at the +base frequency, which may be desirable in certain scenarios to prioritize power +efficiency or manage temperature. + +To manipulate the `boost` attribute, users can write a value of `0` to disable the +boost or `1` to enable it, for the respective CPU using the sysfs path +`/sys/devices/system/cpu/cpuX/cpufreq/boost`, where `X` represents the CPU number. + Other performance and frequency values can be read back from ``/sys/devices/system/cpu/cpuX/acpi_cppc/``, see :ref:`cppc_sysfs`. @@ -406,7 +422,7 @@ control its functionality at the system level. They are located in the ``/sys/devices/system/cpu/amd_pstate/`` directory and affect all CPUs. ``status`` - Operation mode of the driver: "active", "passive" or "disable". + Operation mode of the driver: "active", "passive", "guided" or "disable". "active" The driver is functional and in the ``active mode`` diff --git a/Documentation/admin-guide/pm/cpufreq.rst b/Documentation/admin-guide/pm/cpufreq.rst index 6adb7988e0eb..fe1be4ad88cb 100644 --- a/Documentation/admin-guide/pm/cpufreq.rst +++ b/Documentation/admin-guide/pm/cpufreq.rst @@ -267,6 +267,10 @@ are the following: ``related_cpus`` List of all (online and offline) CPUs belonging to this policy. +``scaling_available_frequencies`` + List of available frequencies of the CPUs belonging to this policy + (in kHz). + ``scaling_available_governors`` List of ``CPUFreq`` scaling governors present in the kernel that can be attached to this policy or (if the |intel_pstate| scaling driver is |