提交 b8b97a42 编写于 作者: S Srinivas Pandruvada 提交者: Rafael J. Wysocki

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: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
上级 185d8245
...@@ -122,11 +122,12 @@ will run at is selected by the processor itself. ...@@ -122,11 +122,12 @@ will run at is selected by the processor itself.
Tuning Intel P-State driver Tuning Intel P-State driver
When HWP mode is not used, debugfs files have also been added to allow the When the performance can be tuned using PID (Proportional Integral
tuning of the internal governor algorithm. These files are located at Derivative) controller, debugfs files are provided for adjusting performance.
/sys/kernel/debug/pstate_snb/. The algorithm uses a PID (Proportional They are presented under:
Integral Derivative) controller. The PID tunable parameters are: /sys/kernel/debug/pstate_snb/
The PID tunable parameters are:
deadband deadband
d_gain_pct d_gain_pct
i_gain_pct i_gain_pct
......
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