yardstick -

Age	Commit message (Expand)	Author	Files	Lines
2017-07-31	Add spec cpu2006 test case	JingLu5	1	-0/+13

/* * step_wise.c - A step-by-step Thermal throttling governor * * Copyright (C) 2012 Intel Corp * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/thermal.h> #include <trace/events/thermal.h> #include "thermal_core.h" /* * If the temperature is higher than a trip point, * a. if the trend is THERMAL_TREND_RAISING, use higher cooling * state for this trip point * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling * state for this trip point * c. if the trend is THERMAL_TREND_RAISE_FULL, use upper limit * for this trip point * d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit * for this trip point * If the temperature is lower than a trip point, * a. if the trend is THERMAL_TREND_RAISING, do nothing * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling * state for this trip point, if the cooling state already * equals lower limit, deactivate the thermal instance * c. if the trend is THERMAL_TREND_RAISE_FULL, do nothing * d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit, * if the cooling state already equals lower limit, * deactivate the thermal instance */ static unsigned long get_target_state(struct thermal_instance *instance, enum thermal_trend trend, bool throttle) { struct thermal_cooling_device *cdev = instance->cdev; unsigned long cur_state; unsigned long next_target; /* * We keep this instance the way it is by default. * Otherwise, we use the current state of the * cdev in use to determine the next_target. */ cdev->ops->get_cur_state(cdev, &cur_state); next_target = instance->target; dev_dbg(&cdev->device, "cur_state=%ld\n", cur_state); switch (trend) { case THERMAL_TREND_RAISING: if (throttle) { next_target = cur_state < instance->upper ? (cur_state + 1) : instance->upper; if (next_target < instance->lower) next_target = instance->lower; } break; case THERMAL_TREND_RAISE_FULL: if (throttle) next_target = instance->upper; break; case THERMAL_TREND_DROPPING: if (cur_state <= instance->lower) { if (!throttle) next_target = THERMAL_NO_TARGET; } else { next_target = cur_state - 1; if (next_target > instance->upper) next_target = instance->upper; } break; case THERMAL_TREND_DROP_FULL: if (cur_state == instance->lower) { if (!throttle) next_target = THERMAL_NO_TARGET; } else next_target = instance->lower; break; default: break; } return next_target; } static void update_passive_instance(struct thermal_zone_device *tz, enum thermal_trip_type type, int value) { /* * If value is +1, activate a passive instance. * If value is -1, deactivate a passive instance. */ if (type == THERMAL_TRIP_PASSIVE || type == THERMAL_TRIPS_NONE) tz->passive += value; } static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) { long trip_temp; enum thermal_trip_type trip_type; enum thermal_trend trend; struct thermal_instance *instance; bool throttle = false; int old_target; if (trip == THERMAL_TRIPS_NONE) { trip_temp = tz->forced_passive; trip_type = THERMAL_TRIPS_NONE; } else { tz->ops->get_trip_temp(tz, trip, &trip_temp); tz->ops->get_trip_type(tz, trip, &trip_type); } trend = get_tz_trend(tz, trip); if (tz->temperature >= trip_temp) { throttle = true; trace_thermal_zone_trip(tz, trip, trip_type); } dev_dbg(&tz->device, "Trip%d[type=%d,temp=%ld]:trend=%d,throttle=%d\n", trip, trip_type, trip_temp, trend, throttle); mutex_lock(&tz->lock); list_for_each_entry(instance, &tz->thermal_instances, tz_node) { if (instance->trip != trip) continue; old_target = instance->target; instance->target = get_target_state(instance, trend, throttle); dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n", old_target, (int)instance->target); if (old_target == instance->target) continue; /* Activate a passive thermal instance */ if (old_target == THERMAL_NO_TARGET && instance->target != THERMAL_NO_TARGET) update_passive_instance(tz, trip_type, 1); /* Deactivate a passive thermal instance */ else if (old_target != THERMAL_NO_TARGET && instance->target == THERMAL_NO_TARGET) update_passive_instance(tz, trip_type, -1); instance->cdev->updated = false; /* cdev needs update */ } mutex_unlock(&tz->lock); } /** * step_wise_throttle - throttles devices associated with the given zone * @tz - thermal_zone_device * @trip - the trip point * @trip_type - type of the trip point * * Throttling Logic: This uses the trend of the thermal zone to throttle. * If the thermal zone is 'heating up' this throttles all the cooling * devices associated with the zone and its particular trip point, by one * step. If the zone is 'cooling down' it brings back the performance of * the devices by one step. */ static int step_wise_throttle(struct thermal_zone_device *tz, int trip) { struct thermal_instance *instance; thermal_zone_trip_update(tz, trip); if (tz->forced_passive) thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE); mutex_lock(&tz->lock); list_for_each_entry(instance, &tz->thermal_instances, tz_node) thermal_cdev_update(instance->cdev); mutex_unlock(&tz->lock); return 0; } static struct thermal_governor thermal_gov_step_wise = { .name = "step_wise", .throttle = step_wise_throttle, }; int thermal_gov_step_wise_register(void) { return thermal_register_governor(&thermal_gov_step_wise); } void thermal_gov_step_wise_unregister(void) { thermal_unregister_governor(&thermal_gov_step_wise); }