thermal: trace: Trace when a cooling device's state is updated (39811569) · Commits · 戴 / test

Introduce and use an event to trace when a cooling device's state is updated. This is useful to follow the effect of governor decisions on cooling devices. 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>

drivers/thermal/thermal_core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1291,6 +1291,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev)
		mutex_unlock(&cdev->lock);
		cdev->ops->set_cur_state(cdev, target);
		cdev->updated = true;
		trace_cdev_update(cdev, target);
		dev_dbg(&cdev->device, "set to state %lu\n", target);
		}
		EXPORT_SYMBOL(thermal_cdev_update);

include/trace/events/thermal.h

+19 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,25 @@ TRACE_EVENT(thermal_temperature,
		__entry->temp)
		);

		TRACE_EVENT(cdev_update,

		TP_PROTO(struct thermal_cooling_device *cdev, unsigned long target),

		TP_ARGS(cdev, target),

		TP_STRUCT__entry(
		__string(type, cdev->type)
		__field(unsigned long, target)
		),

		TP_fast_assign(
		__assign_str(type, cdev->type);
		__entry->target = target;
		),

		TP_printk("type=%s target=%lu", __get_str(type), __entry->target)
		);

		#endif /* _TRACE_THERMAL_H */

		/* This part must be outside protection */

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