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| author | Natesh Sharma <nsharma@redhat.com> | 2023-04-27 14:07:06 +0530 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2023-05-19 08:33:27 -0600 |
| commit | f02c20d9f1567ac483c62342a4d6ac33790e3b2e (patch) | |
| tree | 235227744d7505243d40c672ccb39d272181bf93 /Documentation/admin-guide | |
| parent | bd415b5c9552d44069d4e7c1e018b6d42f25af9e (diff) | |
| download | linux-stable-f02c20d9f1567ac483c62342a4d6ac33790e3b2e.tar.gz linux-stable-f02c20d9f1567ac483c62342a4d6ac33790e3b2e.tar.bz2 linux-stable-f02c20d9f1567ac483c62342a4d6ac33790e3b2e.zip | |
docs: admin-guide: Add information about intel_pstate active mode
Information about intel_pstate active mode is added in the doc.
This operation mode could be used to set on the hardware when it's
not activated. Status of the mode could be checked from sysfs file
i.e., /sys/devices/system/cpu/intel_pstate/status.
The information is already available in cpu-freq/intel-pstate.txt
documentation.
Signed-off-by: Natesh Sharma <nsharma@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
[jc: reformatted for width ]
Link: https://lore.kernel.org/r/20230427083706.49882-1-nsharma@redhat.com
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 9e5bab29685f..430d0ef90273 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2117,6 +2117,16 @@ disable Do not enable intel_pstate as the default scaling driver for the supported processors + active + Use intel_pstate driver to bypass the scaling + governors layer of cpufreq and provides it own + algorithms for p-state selection. There are two + P-state selection algorithms provided by + intel_pstate in the active mode: powersave and + performance. The way they both operate depends + on whether or not the hardware managed P-states + (HWP) feature has been enabled in the processor + and possibly on the processor model. passive Use intel_pstate as a scaling driver, but configure it to work with generic cpufreq governors (instead of |