path: root/Documentation/cpu-freq
diff options
authorKristen Carlson Accardi <>2015-01-28 15:03:27 -0800
committerRafael J. Wysocki <>2015-01-30 01:52:17 +0100
commitd01b1f48c5fd95901203bd830458eaf619ed6c47 (patch)
treedf29b42bb4495db5a24940b7a05c9cf888fb2150 /Documentation/cpu-freq
parent7ab0256e57ae4423fbfb6b6c1611578c634702c9 (diff)
intel_pstate: expose turbo range to sysfs
This patch adds "turbo_pct" to the intel_pstate sysfs interface. turbo_pct will display the percentage of the total supported pstates that are in the turbo range. This value is independent of whether turbo has been disabled or not. Signed-off-by: Kristen Carlson Accardi <> Signed-off-by: Rafael J. Wysocki <>
Diffstat (limited to 'Documentation/cpu-freq')
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt
index 765d7fc0e692..7767ce6756be 100644
--- a/Documentation/cpu-freq/intel-pstate.txt
+++ b/Documentation/cpu-freq/intel-pstate.txt
@@ -37,6 +37,10 @@ controlling P state selection. These files have been added to
no_turbo: limits the driver to selecting P states below the turbo
frequency range.
+ turbo_pct: displays the percentage of the total performance that
+ is supported by hardware that is in the turbo range. 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