The minimum value to which the maximum core frequency can be reduced by the throttling algorithm.
The algorithm dynamically adjusts a proportional multiplier for the frequency step size. min_multiplier and max_multiplier define the bounds for this dynamic multiplier.
The throttling algorithm restricts the rate at which the maximum frequency can decrease to avoid an excessively rapid drop in frequency (and thus performance). full_throttle_min_time_ms specifies the minimum time (in milliseconds) required for the frequency to decrease from the maximum to the absolute minimum (not min_freq).
The algorithm calculates a target temperature velocity at each step and determines the difference between the actual and target velocity, using this difference as an error value. When the actual temperature is higher than the target temperature, the maximum target descent velocity is strictly limited to a value lower than max_descent_velocity. The unit is degrees per second.
The frequency is limited periodically rather than continuously or instantly. Shorter periods allow the algorithm to work more precisely but increase the number of sysfs reads and writes per second, resulting in higher power consumption. A min_period_ms value below 100 ms is not recommended; values above 100 ms are considered optimal. If min_period_ms exceeds 500 ms, the algorithm's accuracy decreases. max_period_ms must be equal to or greater than min_period_ms and should be lower than the desired response time of the algorithm (and lower than start_time_ms for accuracy).
If has_idle is set to true, a special transition algorithm is activated: when throttling conditions are met, the sampling period decreases exponentially; otherwise, it increases linearly. If has_idle is set to false, these values are irrelevant and can be omitted.
If multicore_limiter_allowed is set to true, core_idleness_factor_ms defines the time (in milliseconds) required for a CPU core to become free (unlimited) if its frequency is below the current internal frequency limit. Very low values (< 1000 ms) can cause significant temperature instability under medium CPU load. This can be mitigated by using a very low full_throttle_min_time_ms and a sufficiently high min_multiplier. Very high values render the multicore limiter algorithm ineffective.
If has_idle is set to true, this parameter controls the point during the sampling period transition when the frequency is no longer limited. For example, an idle_threshold value of 0.1 means that frequency limiting stops when actual_period > (max_period - min_period) * 0.1 + min_period. A low value (< 0.1) is recommended.
This flag enables the smooth transition algorithm for the sampling period.
This flag determines whether the frequency will be limited uniformly across all cores (false) or whether idle cores will remain unrestricted (true). When enabled, it is more effective with higher min_period_ms values and lower core_idleness_factor_ms values. This algorithm may impose less strict frequency limitations compared to the standard approach.