include/linux/energy_model.h

15  * struct em_perf_state - Performance state of a performance domain
16  * @performance:	CPU performance (capacity) at a given frequency
25 	unsigned long performance;
35  * EM_PERF_STATE_INEFFICIENT: The performance state is inefficient. There is
36  * in this em_perf_domain, another performance state with a higher frequency
46  * @state:	List of performance states, in ascending order
57  * @nr_perf_states:	Number of performance states
60  *			for performance reasons to avoid potential cache
64  * In case of CPU device, a "performance domain" represents a group of CPUs
65  * whose performance is scaled together. All CPUs of a performance domain
118 	 * active_power() - Provide power at the next performance state of
121 	 * @power	: Active power at the performance state
123 	 * @freq	: Frequency at the performance state in kHz
126 	 * active_power() must find the lowest performance state of 'dev' above
140 	 * get_cost() - Provide the cost at the given performance state of
143 	 * @freq	: Frequency at the performance state in kHz
144 	 * @cost	: The cost value for the performance state
177  * em_pd_get_efficient_state() - Get an efficient performance state from the EM
178  * @table:		List of performance states, in ascending order
179  * @nr_perf_states:	Number of performance states
186  * Return: An efficient performance state id, high enough to meet @max_util
198 		if (ps->performance >= max_util) {
211  *		performance domain
212  * @pd		: performance domain for which energy has to be estimated
241 	 * In order to predict the performance state, map the utilization of
242 	 * the most utilized CPU of the performance domain to a requested
243 	 * performance, like schedutil. Take also into account that the real
244 	 * performance might be set lower (due to thermal capping). Thus, clamp
246 	 * effective performance.
251 	 * Find the lowest performance state of the Energy Model above the
252 	 * requested performance.
260 	 * The performance (capacity) of a CPU in the domain at the performance
264 	 *   ps->performance = --------------------                  (1)
268 	 * the EM), the energy consumed by this CPU at that performance state
273 	 *               ps->performance
275 	 * since 'cpu_util / ps->performance' represents its percentage of busy
304  * em_pd_nr_perf_states() - Get the number of performance states of a perf.
306  * @pd		: performance domain for which this must be done
308  * Return: the number of performance states in the performance domain table
316  * em_perf_state_from_pd() - Get the performance states table of perf.
318  * @pd		: performance domain for which this must be done
321  * of the performance states table is finished, the rcu_read_unlock() should
324  * Return: the pointer to performance states table of the performance domain