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Commit ae8822b8 authored by Sahara's avatar Sahara Committed by Rafael J. Wysocki
Browse files

PM / QoS: Add pm_qos_request tracepoints 



Adds tracepoints to pm_qos_add_request, pm_qos_update_request,
pm_qos_remove_request, and pm_qos_update_request_timeout.
It's useful for checking pm_qos_class, value, and timeout_us.

Signed-off-by: default avatarSahara <keun-o.park@windriver.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 247e9ee0

include/trace/events/power.h

+71 −0
Original line number Diff line number Diff line
@@ -182,6 +182,77 @@ DEFINE_EVENT(power_domain, power_domain_target, 
/*

 * The pm qos events are used for pm qos update

 */

DECLARE_EVENT_CLASS(pm_qos_request,



	TP_PROTO(int pm_qos_class, s32 value),



	TP_ARGS(pm_qos_class, value),



	TP_STRUCT__entry(

		__field( int,                    pm_qos_class   )

		__field( s32,                    value          )

	),



	TP_fast_assign(

		__entry->pm_qos_class = pm_qos_class;

		__entry->value = value;

	),



	TP_printk("pm_qos_class=%s value=%d",

		  __print_symbolic(__entry->pm_qos_class,

			{ PM_QOS_CPU_DMA_LATENCY,	"CPU_DMA_LATENCY" },

			{ PM_QOS_NETWORK_LATENCY,	"NETWORK_LATENCY" },

			{ PM_QOS_NETWORK_THROUGHPUT,	"NETWORK_THROUGHPUT" }),

		  __entry->value)

);



DEFINE_EVENT(pm_qos_request, pm_qos_add_request,



	TP_PROTO(int pm_qos_class, s32 value),



	TP_ARGS(pm_qos_class, value)

);



DEFINE_EVENT(pm_qos_request, pm_qos_update_request,



	TP_PROTO(int pm_qos_class, s32 value),



	TP_ARGS(pm_qos_class, value)

);



DEFINE_EVENT(pm_qos_request, pm_qos_remove_request,



	TP_PROTO(int pm_qos_class, s32 value),



	TP_ARGS(pm_qos_class, value)

);



TRACE_EVENT(pm_qos_update_request_timeout,



	TP_PROTO(int pm_qos_class, s32 value, unsigned long timeout_us),



	TP_ARGS(pm_qos_class, value, timeout_us),



	TP_STRUCT__entry(

		__field( int,                    pm_qos_class   )

		__field( s32,                    value          )

		__field( unsigned long,          timeout_us     )

	),



	TP_fast_assign(

		__entry->pm_qos_class = pm_qos_class;

		__entry->value = value;

		__entry->timeout_us = timeout_us;

	),



	TP_printk("pm_qos_class=%s value=%d, timeout_us=%ld",

		  __print_symbolic(__entry->pm_qos_class,

			{ PM_QOS_CPU_DMA_LATENCY,	"CPU_DMA_LATENCY" },

			{ PM_QOS_NETWORK_LATENCY,	"NETWORK_LATENCY" },

			{ PM_QOS_NETWORK_THROUGHPUT,	"NETWORK_THROUGHPUT" }),

		  __entry->value, __entry->timeout_us)

);



DECLARE_EVENT_CLASS(pm_qos_update,



	TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),

kernel/power/qos.c

+5 −0
Original line number Diff line number Diff line
@@ -336,6 +336,7 @@ void pm_qos_add_request(struct pm_qos_request *req, 
	}

	req->pm_qos_class = pm_qos_class;

	INIT_DELAYED_WORK(&req->work, pm_qos_work_fn);

	trace_pm_qos_add_request(pm_qos_class, value);

	pm_qos_update_target(pm_qos_array[pm_qos_class]->constraints,

			     &req->node, PM_QOS_ADD_REQ, value);

}
@@ -364,6 +365,7 @@ void pm_qos_update_request(struct pm_qos_request *req, 


	cancel_delayed_work_sync(&req->work);



	trace_pm_qos_update_request(req->pm_qos_class, new_value);

	if (new_value != req->node.prio)

		pm_qos_update_target(

			pm_qos_array[req->pm_qos_class]->constraints,
@@ -390,6 +392,8 @@ void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value, 


	cancel_delayed_work_sync(&req->work);



	trace_pm_qos_update_request_timeout(req->pm_qos_class,

					    new_value, timeout_us);

	if (new_value != req->node.prio)

		pm_qos_update_target(

			pm_qos_array[req->pm_qos_class]->constraints,
@@ -419,6 +423,7 @@ void pm_qos_remove_request(struct pm_qos_request *req) 


	cancel_delayed_work_sync(&req->work);



	trace_pm_qos_remove_request(req->pm_qos_class, PM_QOS_DEFAULT_VALUE);

	pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints,

			     &req->node, PM_QOS_REMOVE_REQ,

			     PM_QOS_DEFAULT_VALUE);