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Commit 96d9d0b5 authored by Sahara's avatar Sahara Committed by Rafael J. Wysocki
Browse files

PM / QoS: Add dev_pm_qos_request tracepoints 



Adds tracepoints to dev_pm_qos_add_request, dev_pm_qos_update_request,
and dev_pm_qos_remove_request.  It's useful for checking device name,
dev_pm_qos_request_type, and value.

Signed-off-by: default avatarSahara <keun-o.park@windriver.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent ae8822b8

drivers/base/power/qos.c

+6 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/export.h>

#include <linux/pm_runtime.h>

#include <linux/err.h>

#include <trace/events/power.h>



#include "power.h"
@@ -305,6 +306,7 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req, 
	else if (!dev->power.qos)

		ret = dev_pm_qos_constraints_allocate(dev);



	trace_dev_pm_qos_add_request(dev_name(dev), type, value);

	if (!ret) {

		req->dev = dev;

		req->type = type;
@@ -349,6 +351,8 @@ static int __dev_pm_qos_update_request(struct dev_pm_qos_request *req, 
		return -EINVAL;

	}



	trace_dev_pm_qos_update_request(dev_name(req->dev), req->type,

					new_value);

	if (curr_value != new_value)

		ret = apply_constraint(req, PM_QOS_UPDATE_REQ, new_value);
@@ -398,6 +402,8 @@ static int __dev_pm_qos_remove_request(struct dev_pm_qos_request *req) 
	if (IS_ERR_OR_NULL(req->dev->power.qos))

		return -ENODEV;



	trace_dev_pm_qos_remove_request(dev_name(req->dev), req->type,

					PM_QOS_DEFAULT_VALUE);

	ret = apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);

	memset(req, 0, sizeof(*req));

	return ret;

include/trace/events/power.h

+51 −0
Original line number Diff line number Diff line
@@ -299,6 +299,57 @@ DEFINE_EVENT_PRINT(pm_qos_update, pm_qos_update_flags, 
			{ PM_QOS_REMOVE_REQ,	"REMOVE_REQ" }),

		  __entry->prev_value, __entry->curr_value)

);



DECLARE_EVENT_CLASS(dev_pm_qos_request,



	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,

		 s32 new_value),



	TP_ARGS(name, type, new_value),



	TP_STRUCT__entry(

		__string( name,                    name         )

		__field( enum dev_pm_qos_req_type, type         )

		__field( s32,                      new_value    )

	),



	TP_fast_assign(

		__assign_str(name, name);

		__entry->type = type;

		__entry->new_value = new_value;

	),



	TP_printk("device=%s type=%s new_value=%d",

		  __get_str(name),

		  __print_symbolic(__entry->type,

			{ DEV_PM_QOS_LATENCY,	"DEV_PM_QOS_LATENCY" },

			{ DEV_PM_QOS_FLAGS,	"DEV_PM_QOS_FLAGS" }),

		  __entry->new_value)

);



DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_add_request,



	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,

		 s32 new_value),



	TP_ARGS(name, type, new_value)

);



DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_update_request,



	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,

		 s32 new_value),



	TP_ARGS(name, type, new_value)

);



DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_remove_request,



	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,

		 s32 new_value),



	TP_ARGS(name, type, new_value)

);

#endif /* _TRACE_POWER_H */



/* This part must be outside protection */