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authorDirk Brandewie <dirk.j.brandewie@intel.com>2014-06-20 07:28:00 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-07-07 01:22:19 +0200
commit41629a8233470325bfbb60377f555f9e8acc879f (patch)
tree0c5ebc91cf4ea05fdfc935314d28e89e0805b48e /Documentation/cpu-freq
parentdd5fbf70f96dbfd7ee432096a1f979b2b3267856 (diff)
downloadkernel-41629a8233470325bfbb60377f555f9e8acc879f.tar.gz
intel_pstate: Update documentation of {max,min}_perf_pct sysfs files
Update documentation to make the interpretation of the values clearer Link: https://bugzilla.kernel.org/show_bug.cgi?id=64251 Cc: 3.13+ <stable@vger.kernel.org> # 3.13+ Signed-off-by: Dirk Brandewie <dirk.j.brandewie@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.txt7
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt
index e742d21dbd96..a69ffe1d54d5 100644
--- a/Documentation/cpu-freq/intel-pstate.txt
+++ b/Documentation/cpu-freq/intel-pstate.txt
@@ -15,10 +15,13 @@ New sysfs files for controlling P state selection have been added to
/sys/devices/system/cpu/intel_pstate/
max_perf_pct: limits the maximum P state that will be requested by
- the driver stated as a percentage of the available performance.
+ the driver stated as a percentage of the available performance. The
+ available (P states) performance may be reduced by the no_turbo
+ setting described below.
min_perf_pct: limits the minimum P state that will be requested by
- the driver stated as a percentage of the available performance.
+ the driver stated as a percentage of the max (non-turbo)
+ performance level.
no_turbo: limits the driver to selecting P states below the turbo
frequency range.