Commit a3cd6db4 authored by Lukasz Luba's avatar Lukasz Luba Committed by Rafael J. Wysocki
Browse files

thermal: gov_power_allocator: Support new update callback of weights 



When the thermal instance's weight is updated from the sysfs the governor
update_tz() callback is triggered. Implement proper reaction to this
event in the IPA, which would save CPU cycles spent in throttle().
This will speed-up the main throttle() IPA function and clean it up
a bit.

Signed-off-by: default avatarLukasz Luba <lukasz.luba@arm.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent bfc57bd1

drivers/thermal/gov_power_allocator.c

+9 −6
Original line number Diff line number Diff line
@@ -77,6 +77,7 @@ struct power_actor { 
 *			@trip_switch_on should be NULL.

 * @trip_max:		last passive trip point of the thermal zone. The

 *			temperature we are controlling for.

 * @total_weight:	Sum of all thermal instances weights

 * @num_actors:		number of cooling devices supporting IPA callbacks

 * @buffer_size:	internal buffer size, to avoid runtime re-calculation

 * @power:		buffer for all power actors internal power information
@@ -88,6 +89,7 @@ struct power_allocator_params { 
	u32 sustainable_power;

	const struct thermal_trip *trip_switch_on;

	const struct thermal_trip *trip_max;

	int total_weight;

	unsigned int num_actors;

	unsigned int buffer_size;

	struct power_actor *power;
@@ -405,16 +407,11 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp) 
	u32 total_granted_power = 0;

	u32 total_req_power = 0;

	u32 power_range, weight;

	int total_weight = 0;

	int i = 0, ret;



	if (!num_actors)

		return -ENODEV;



	list_for_each_entry(instance, &tz->thermal_instances, tz_node)

		if (power_actor_is_valid(params, instance))

			total_weight += instance->weight;



	/* Clean all buffers for new power estimations */

	memset(power, 0, params->buffer_size);
@@ -430,7 +427,7 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp) 
		if (ret)

			continue;



		if (!total_weight)

		if (!params->total_weight)

			weight = 1 << FRAC_BITS;

		else

			weight = instance->weight;
@@ -651,6 +648,12 @@ static void power_allocator_update_tz(struct thermal_zone_device *tz, 


		allocate_actors_buffer(params, num_actors);

		break;

	case THERMAL_INSTANCE_WEIGHT_CHANGED:

		params->total_weight = 0;

		list_for_each_entry(instance, &tz->thermal_instances, tz_node)

			if (power_actor_is_valid(params, instance))

				params->total_weight += instance->weight;

		break;

	default:

		break;

	}