thermal: trace: Trace temperature changes
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>
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@ -38,6 +38,9 @@
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/thermal.h>
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#include "thermal_core.h"
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#include "thermal_hwmon.h"
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@ -463,6 +466,7 @@ static void update_temperature(struct thermal_zone_device *tz)
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tz->temperature = temp;
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mutex_unlock(&tz->lock);
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trace_thermal_temperature(tz);
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dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n",
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tz->last_temperature, tz->temperature);
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}
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38
include/trace/events/thermal.h
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38
include/trace/events/thermal.h
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@ -0,0 +1,38 @@
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM thermal
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#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_THERMAL_H
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#include <linux/thermal.h>
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#include <linux/tracepoint.h>
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TRACE_EVENT(thermal_temperature,
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TP_PROTO(struct thermal_zone_device *tz),
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TP_ARGS(tz),
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TP_STRUCT__entry(
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__string(thermal_zone, tz->type)
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__field(int, id)
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__field(int, temp_prev)
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__field(int, temp)
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),
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TP_fast_assign(
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__assign_str(thermal_zone, tz->type);
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__entry->id = tz->id;
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__entry->temp_prev = tz->last_temperature;
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__entry->temp = tz->temperature;
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),
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TP_printk("thermal_zone=%s id=%d temp_prev=%d temp=%d",
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__get_str(thermal_zone), __entry->id, __entry->temp_prev,
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__entry->temp)
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);
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#endif /* _TRACE_THERMAL_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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