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thermal: trace: Trace temperature changes

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Create a new event to trace the temperature of a thermal zone. Using
this event trace the temperature changes of the thermal zone every-time
it is updated.

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: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Punit Agrawal 2014-07-29 11:50:48 +01:00 committed by Eduardo Valentin
parent 47d104ba58
commit 100a8fdbf5
2 changed files with 42 additions and 0 deletions
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4
drivers/thermal/thermal_core.c
View File

@ -38,6 +38,9 @@
#include <net/netlink.h> #include <net/netlink.h>
#include <net/genetlink.h> #include <net/genetlink.h>
#define CREATE_TRACE_POINTS
#include <trace/events/thermal.h>
#include "thermal_core.h" #include "thermal_core.h"
#include "thermal_hwmon.h" #include "thermal_hwmon.h"
@ -463,6 +466,7 @@ static void update_temperature(struct thermal_zone_device *tz)
tz->temperature = temp; tz->temperature = temp;
mutex_unlock(&tz->lock); mutex_unlock(&tz->lock);
trace_thermal_temperature(tz);
dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n",
tz->last_temperature, tz->temperature); tz->last_temperature, tz->temperature);
} }

38
include/trace/events/thermal.h Normal file
View File

@ -0,0 +1,38 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM thermal
#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_THERMAL_H
#include <linux/thermal.h>
#include <linux/tracepoint.h>
TRACE_EVENT(thermal_temperature,
TP_PROTO(struct thermal_zone_device *tz),
TP_ARGS(tz),
TP_STRUCT__entry(
__string(thermal_zone, tz->type)
__field(int, id)
__field(int, temp_prev)
__field(int, temp)
),
TP_fast_assign(
__assign_str(thermal_zone, tz->type);
__entry->id = tz->id;
__entry->temp_prev = tz->last_temperature;
__entry->temp = tz->temperature;
),
TP_printk("thermal_zone=%s id=%d temp_prev=%d temp=%d",
__get_str(thermal_zone), __entry->id, __entry->temp_prev,
__entry->temp)
);
#endif /* _TRACE_THERMAL_H */
/* This part must be outside protection */
#include <trace/define_trace.h>