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authorPunit Agrawal <punit.agrawal@arm.com>2014-07-29 14:50:48 +0400
committerEduardo Valentin <edubezval@gmail.com>2014-07-29 17:27:54 +0400
commit100a8fdbf525bb11796692a713c267be6523a890 (patch)
tree022fba36cc4c2ddc321ca7f069c987e491877f61
parent47d104ba5879790c7c91c3390b0b08399e168efe (diff)
downloadlinux-100a8fdbf525bb11796692a713c267be6523a890.tar.xz
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>
-rw-r--r--drivers/thermal/thermal_core.c4
-rw-r--r--include/trace/events/thermal.h38
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 71b0ec0c370d..6b32391260a0 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -38,6 +38,9 @@
#include <net/netlink.h>
#include <net/genetlink.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/thermal.h>
+
#include "thermal_core.h"
#include "thermal_hwmon.h"
@@ -463,6 +466,7 @@ static void update_temperature(struct thermal_zone_device *tz)
tz->temperature = temp;
mutex_unlock(&tz->lock);
+ trace_thermal_temperature(tz);
dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n",
tz->last_temperature, tz->temperature);
}
diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h
new file mode 100644
index 000000000000..8c5ca96eccd6
--- /dev/null
+++ b/include/trace/events/thermal.h
@@ -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>