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Commit 9876b1a4 authored by Javi Merino's avatar Javi Merino Committed by Eduardo Valentin
Browse files

devfreq_cooling: add trace information 



Tracing is useful for debugging and performance tuning.  Add similar
traces to what's present in the cpu cooling device.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarJavi Merino <javi.merino@arm.com>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent a76caf55

drivers/thermal/devfreq_cooling.c

+6 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ 
#include <linux/pm_opp.h>

#include <linux/thermal.h>



#include <trace/events/thermal.h>



static DEFINE_MUTEX(devfreq_lock);

static DEFINE_IDR(devfreq_idr);
@@ -293,6 +295,9 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd 
	/* Get static power */

	static_power = get_static_power(dfc, freq);



	trace_thermal_power_devfreq_get_power(cdev, status, freq, dyn_power,

					      static_power);



	*power = dyn_power + static_power;



	return 0;
@@ -348,6 +353,7 @@ static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev, 
			break;



	*state = i;

	trace_thermal_power_devfreq_limit(cdev, freq, *state, power);

	return 0;

}

include/trace/events/thermal.h

+53 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_THERMAL_H



#include <linux/devfreq.h>

#include <linux/thermal.h>

#include <linux/tracepoint.h>
@@ -135,6 +136,58 @@ TRACE_EVENT(thermal_power_cpu_limit, 
		__entry->power)

);



TRACE_EVENT(thermal_power_devfreq_get_power,

	TP_PROTO(struct thermal_cooling_device *cdev,

		 struct devfreq_dev_status *status, unsigned long freq,

		u32 dynamic_power, u32 static_power),



	TP_ARGS(cdev, status,  freq, dynamic_power, static_power),



	TP_STRUCT__entry(

		__string(type,         cdev->type    )

		__field(unsigned long, freq          )

		__field(u32,           load          )

		__field(u32,           dynamic_power )

		__field(u32,           static_power  )

	),



	TP_fast_assign(

		__assign_str(type, cdev->type);

		__entry->freq = freq;

		__entry->load = (100 * status->busy_time) / status->total_time;

		__entry->dynamic_power = dynamic_power;

		__entry->static_power = static_power;

	),



	TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u",

		__get_str(type), __entry->freq,

		__entry->load, __entry->dynamic_power, __entry->static_power)

);



TRACE_EVENT(thermal_power_devfreq_limit,

	TP_PROTO(struct thermal_cooling_device *cdev, unsigned long freq,

		unsigned long cdev_state, u32 power),



	TP_ARGS(cdev, freq, cdev_state, power),



	TP_STRUCT__entry(

		__string(type,         cdev->type)

		__field(unsigned int,  freq      )

		__field(unsigned long, cdev_state)

		__field(u32,           power     )

	),



	TP_fast_assign(

		__assign_str(type, cdev->type);

		__entry->freq = freq;

		__entry->cdev_state = cdev_state;

		__entry->power = power;

	),



	TP_printk("type=%s freq=%u cdev_state=%lu power=%u",

		__get_str(type), __entry->freq, __entry->cdev_state,

		__entry->power)

);

#endif /* _TRACE_THERMAL_H */



/* This part must be outside protection */