Commit 208cd822 authored by Punit Agrawal's avatar Punit Agrawal Committed by Eduardo Valentin
Browse files

thermal: trace: Trace when temperature is above a trip point 



Create a new event to trace when the temperature is above a trip
point. Use the trace-point when handling non-critical and critical
trip pionts.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarPunit Agrawal <punit.agrawal@arm.com>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent 39811569

drivers/thermal/fair_share.c

+12 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 */



#include <linux/thermal.h>

#include <trace/events/thermal.h>



#include "thermal_core.h"
@@ -34,6 +35,7 @@ static int get_trip_level(struct thermal_zone_device *tz) 
{

	int count = 0;

	unsigned long trip_temp;

	enum thermal_trip_type trip_type;



	if (tz->trips == 0 || !tz->ops->get_trip_temp)

		return 0;
@@ -43,6 +45,16 @@ static int get_trip_level(struct thermal_zone_device *tz) 
		if (tz->temperature < trip_temp)

			break;

	}



	/*

	 * count > 0 only if temperature is greater than first trip

	 * point, in which case, trip_point = count - 1

	 */

	if (count > 0) {

		tz->ops->get_trip_type(tz, count - 1, &trip_type);

		trace_thermal_zone_trip(tz, count - 1, trip_type);

	}



	return count;

}

drivers/thermal/step_wise.c

+4 −1
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 */



#include <linux/thermal.h>

#include <trace/events/thermal.h>



#include "thermal_core.h"
@@ -129,8 +130,10 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) 


	trend = get_tz_trend(tz, trip);



	if (tz->temperature >= trip_temp)

	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);

drivers/thermal/thermal_core.c

+2 −0
Original line number Diff line number Diff line
@@ -371,6 +371,8 @@ static void handle_critical_trips(struct thermal_zone_device *tz, 
	if (tz->temperature < trip_temp)

		return;



	trace_thermal_zone_trip(tz, trip, trip_type);



	if (tz->ops->notify)

		tz->ops->notify(tz, trip, trip_type);

include/trace/events/thermal.h

+26 −0
Original line number Diff line number Diff line
@@ -51,6 +51,32 @@ TRACE_EVENT(cdev_update, 
	TP_printk("type=%s target=%lu", __get_str(type), __entry->target)

);



TRACE_EVENT(thermal_zone_trip,



	TP_PROTO(struct thermal_zone_device *tz, int trip,

		enum thermal_trip_type trip_type),



	TP_ARGS(tz, trip, trip_type),



	TP_STRUCT__entry(

		__string(thermal_zone, tz->type)

		__field(int, id)

		__field(int, trip)

		__field(enum thermal_trip_type, trip_type)

	),



	TP_fast_assign(

		__assign_str(thermal_zone, tz->type);

		__entry->id = tz->id;

		__entry->trip = trip;

		__entry->trip_type = trip_type;

	),



	TP_printk("thermal_zone=%s id=%d trip=%d trip_type=%d",

		__get_str(thermal_zone), __entry->id, __entry->trip,

		__entry->trip_type)

);



#endif /* _TRACE_THERMAL_H */



/* This part must be outside protection */

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