Lines Matching refs:the
4 This driver provides an interface to control the P state selection for
6 modes based on the processor model legacy and Hardware P state (HWP)
9 In legacy mode the driver implements a scaling driver with an internal
10 governor for Intel Core processors. The driver follows the same model
11 as the Transmeta scaling driver (longrun.c) and implements the
13 setpolicy() are assumed to implement internal governors by the cpufreq
14 core. All the logic for selecting the current P state is contained
15 within the driver; no external governor is used by the cpufreq core.
17 In HWP mode P state selection is implemented in the processor
18 itself. The driver provides the interfaces between the cpufreq core and
19 the processor to control P state selection based on user preferences
20 and reporting frequency to the cpufreq core. In this mode the
23 In addtion to the interfaces provided by the cpufreq core for
24 controlling frequency the driver provides sysfs files for
28 max_perf_pct: limits the maximum P state that will be requested by
29 the driver stated as a percentage of the available performance. The
30 available (P states) performance may be reduced by the no_turbo
33 min_perf_pct: limits the minimum P state that will be requested by
34 the driver stated as a percentage of the max (non-turbo)
37 no_turbo: limits the driver to selecting P states below the turbo
40 turbo_pct: displays the percentage of the total performance that
41 is supported by hardware that is in the turbo range. This number
44 num_pstates: displays the number of pstates that are supported
48 For contemporary Intel processors, the frequency is controlled by the
49 processor itself and the P-states exposed to software are related to
51 frequency is fiction for Intel Core processors. Even if the scaling
52 driver selects a single P state the actual frequency the processor
53 will run at is selected by the processor itself.
56 the internal governor algorythm. These files are located at