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| author | Kristen Carlson Accardi <kristen@linux.intel.com> | 2015-01-28 15:03:28 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-01-30 01:52:17 +0100 |
| commit | 0522424ecb333c0874c4e74bc053dd662bed40df (patch) | |
| tree | 2d04b3435d5b078c906a52272723546a8bc45545 /Documentation/cpu-freq | |
| parent | d01b1f48c5fd95901203bd830458eaf619ed6c47 (diff) | |
| download | lwn-0522424ecb333c0874c4e74bc053dd662bed40df.tar.gz lwn-0522424ecb333c0874c4e74bc053dd662bed40df.zip | |
intel_pstate: Add num_pstates to sysfs
Add a sysfs interface to display the total number of supported
pstates. This value is independent of whether turbo has been
enabled or disabled.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/cpu-freq')
| -rw-r--r-- | Documentation/cpu-freq/intel-pstate.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt index 7767ce6756be..655750743fb0 100644 --- a/Documentation/cpu-freq/intel-pstate.txt +++ b/Documentation/cpu-freq/intel-pstate.txt @@ -41,6 +41,10 @@ controlling P state selection. These files have been added to is supported by hardware that is in the turbo range. This number is independent of whether turbo has been disabled or not. + num_pstates: displays the number of pstates that are supported + by hardware. This number is independent of whether turbo has + been disabled or not. + For contemporary Intel processors, the frequency is controlled by the processor itself and the P-states exposed to software are related to performance levels. The idea that frequency can be set to a single |