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| author | Nicolas Vollmar <nvo@scaling.ch> | 2024-09-11 12:47:34 +0200 |
|---|---|---|
| committer | Nicolas Vollmar <nvo@scaling.ch> | 2024-09-11 12:47:34 +0200 |
| commit | 1930ed17847404d185b1bef0f1e428a37870de67 (patch) | |
| tree | 27a66e5a086239a8bd36dab62ec2d06add6aa881 | |
| parent | b6b3662367920fb8975c9e14221c12a7569ef8db (diff) | |
| download | vyos-documentation-1930ed17847404d185b1bef0f1e428a37870de67.tar.gz vyos-documentation-1930ed17847404d185b1bef0f1e428a37870de67.zip | |
T6703: Add documentation for AMD pstate driver
| -rw-r--r-- | docs/configuration/system/option.rst | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/docs/configuration/system/option.rst b/docs/configuration/system/option.rst index 44c66186..b5ebaaee 100644 --- a/docs/configuration/system/option.rst +++ b/docs/configuration/system/option.rst @@ -43,8 +43,6 @@ Kernel .. cfgcmd:: set system option kernel disable-power-saving - Disable CPU power saving mechanisms also known as C states. - This will add the following two options to the Kernel commandline: * ``intel_idle.max_cstate=0`` Disable intel_idle and fall back on acpi_idle @@ -52,6 +50,28 @@ Kernel .. note:: Setting will only become active with the next reboot! +.. cfgcmd:: set system option kernel amd-pstate-driver <mode> + + Enables and configures p-state driver for modern AMD Ryzen and Epyc CPUs. + + The available modes are: + + * ``active`` This is the low-level firmware control mode based on the profile + set and the system governor has no effect. + * ``passive`` The driver allows the system governor to manage CPU frequency + while providing available performance states. + * ``guided`` The driver allows to set desired performance levels and the firmware + selects a performance level in this range and fitting to the current workload. + + This will add the following two options to the Kernel commandline: + + * ``initcall_blacklist=acpi_cpufreq_init`` Disable default ACPI CPU frequency scale + * ``amd_pstate={mode}`` Sets the p-state mode + + .. note:: Setting will only become active with the next reboot! + + .. seealso:: https://docs.kernel.org/admin-guide/pm/amd-pstate.html + *********** HTTP client *********** |