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Commit b8b97a42 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
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Documentation: intel_pstate: PID tuning is not always available 



PID tuning is not available when the get_target_pstate_use_cpu_load()
is used to calculate target_state. So update the documentation.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 185d8245

Documentation/cpu-freq/intel-pstate.txt

+5 −4
Original line number Diff line number Diff line
@@ -122,11 +122,12 @@ will run at is selected by the processor itself. 


Tuning Intel P-State driver



When HWP mode is not used, debugfs files have also been added to allow the

tuning of the internal governor algorithm. These files are located at

/sys/kernel/debug/pstate_snb/. The algorithm uses a PID (Proportional

Integral Derivative) controller. The PID tunable parameters are:

When the performance can be tuned using PID (Proportional Integral

Derivative) controller, debugfs files are provided for adjusting performance.

They are presented under:

/sys/kernel/debug/pstate_snb/



The PID tunable parameters are:

      deadband

      d_gain_pct

      i_gain_pct