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Commit 649f53a3 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Documentation: intel_pstate: Describe hwp_dynamic_boost sysfs knob 



Document the recently introduced hwp_dynamic_boost sysfs knob
allowing user space to tell intel_pstate to use iowait boosting
in the active mode with HWP enabled (to improve performance).

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
parent 9e421b8f

Documentation/admin-guide/pm/intel_pstate.rst

+11 −0
Original line number Diff line number Diff line
@@ -378,6 +378,17 @@ argument is passed to the kernel in the command line. 
	but it affects the maximum possible value of per-policy P-state	limits

	(see `Interpretation of Policy Attributes`_ below for details).



``hwp_dynamic_boost``

	This attribute is only present if ``intel_pstate`` works in the

	`active mode with the HWP feature enabled <Active Mode With HWP_>`_ in

	the processor.  If set (equal to 1), it causes the minimum P-state limit

	to be increased dynamically for a short time whenever a task previously

	waiting on I/O is selected to run on a given logical CPU (the purpose

	of this mechanism is to improve performance).



	This setting has no effect on logical CPUs whose minimum P-state limit

	is directly set to the highest non-turbo P-state or above it.



.. _status_attr:



``status``