From: Punit Agrawal <punit.agrawal@arm.com>
To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: javi.merino@arm.com, Punit Agrawal <punit.agrawal@arm.com>,
Zhang Rui <rui.zhang@intel.com>,
Eduardo Valentin <edubezval@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>
Subject: [RFC PATCH 1/3] thermal: trace: Trace temperature changes
Date: Wed, 11 Jun 2014 12:31:42 +0100 [thread overview]
Message-ID: <1402486305-4017-2-git-send-email-punit.agrawal@arm.com> (raw)
In-Reply-To: <1402486305-4017-1-git-send-email-punit.agrawal@arm.com>
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>
---
drivers/thermal/thermal_core.c | 4 ++++
include/trace/events/thermal.h | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+)
create mode 100644 include/trace/events/thermal.h
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 71b0ec0..6b32391 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 0000000..8c5ca96
--- /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>
--
1.7.10.4
next prev parent reply other threads:[~2014-06-11 11:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-11 11:31 [RFC PATCH 0/3] Add trace to thermal framework Punit Agrawal
2014-06-11 11:31 ` Punit Agrawal [this message]
2014-06-11 11:31 ` [RFC PATCH 2/3] thermal: trace: Trace when a cooling device's state is updated Punit Agrawal
2014-06-11 11:31 ` [RFC PATCH 3/3] thermal: trace: Trace when temperature is above a trip point Punit Agrawal
2014-06-11 12:49 ` Steven Rostedt
2014-06-11 14:11 ` Punit Agrawal
2014-06-11 14:20 ` Steven Rostedt
2014-06-11 14:53 ` Punit Agrawal
2014-06-11 15:08 ` Steven Rostedt
2014-06-12 16:16 ` Punit Agrawal
2014-06-20 17:24 ` Javi Merino
2014-06-24 10:41 ` Punit Agrawal
2014-06-25 13:26 ` Javi Merino
2014-07-25 14:11 ` edubezval
2014-07-29 10:50 ` [PATCH 0/3] Add trace to thermal framework Punit Agrawal
2014-07-29 10:50 ` [PATCH 1/3] thermal: trace: Trace temperature changes Punit Agrawal
2014-07-29 10:50 ` [PATCH 2/3] thermal: trace: Trace when a cooling device's state is updated Punit Agrawal
2014-07-29 10:50 ` [PATCH 3/3] thermal: trace: Trace when temperature is above a trip point Punit Agrawal
2014-07-29 13:33 ` [PATCH 0/3] Add trace to thermal framework Eduardo Valentin
2014-07-30 11:40 ` Punit Agrawal
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