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Commit 53b615cc authored by Ming Lei's avatar Ming Lei Committed by Rafael J. Wysocki
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PM / Runtime: Introduce trace points for tracing rpm_* functions 



This patch introduces 3 trace points to prepare for tracing
rpm_idle/rpm_suspend/rpm_resume functions, so we can use these
trace points to replace the current dev_dbg().

Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent ad3c36a5

include/trace/events/rpm.h

0 → 100644
+99 −0
Original line number Diff line number Diff line 


#undef TRACE_SYSTEM

#define TRACE_SYSTEM rpm



#if !defined(_TRACE_RUNTIME_POWER_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_RUNTIME_POWER_H



#include <linux/ktime.h>

#include <linux/tracepoint.h>

#include <linux/device.h>



/*

 * The rpm_internal events are used for tracing some important

 * runtime pm internal functions.

 */

DECLARE_EVENT_CLASS(rpm_internal,



	TP_PROTO(struct device *dev, int flags),



	TP_ARGS(dev, flags),



	TP_STRUCT__entry(

		__string(       name,		dev_name(dev)	)

		__field(        int,            flags           )

		__field(        int ,   	usage_count	)

		__field(        int ,   	disable_depth   )

		__field(        int ,   	runtime_auto	)

		__field(        int ,   	request_pending	)

		__field(        int ,   	irq_safe	)

		__field(        int ,   	child_count 	)

	),



	TP_fast_assign(

		__assign_str(name, dev_name(dev));

		__entry->flags = flags;

		__entry->usage_count = atomic_read(

			&dev->power.usage_count);

		__entry->disable_depth = dev->power.disable_depth;

		__entry->runtime_auto = dev->power.runtime_auto;

		__entry->request_pending = dev->power.request_pending;

		__entry->irq_safe = dev->power.irq_safe;

		__entry->child_count = atomic_read(

			&dev->power.child_count);

	),



	TP_printk("%s flags-%x cnt-%-2d dep-%-2d auto-%-1d p-%-1d"

			" irq-%-1d child-%d",

			__get_str(name), __entry->flags,

			__entry->usage_count,

			__entry->disable_depth,

			__entry->runtime_auto,

			__entry->request_pending,

			__entry->irq_safe,

			__entry->child_count

		 )

);

DEFINE_EVENT(rpm_internal, rpm_suspend,



	TP_PROTO(struct device *dev, int flags),



	TP_ARGS(dev, flags)

);

DEFINE_EVENT(rpm_internal, rpm_resume,



	TP_PROTO(struct device *dev, int flags),



	TP_ARGS(dev, flags)

);

DEFINE_EVENT(rpm_internal, rpm_idle,



	TP_PROTO(struct device *dev, int flags),



	TP_ARGS(dev, flags)

);



TRACE_EVENT(rpm_return_int,

	TP_PROTO(struct device *dev, unsigned long ip, int ret),

	TP_ARGS(dev, ip, ret),



	TP_STRUCT__entry(

		__string(       name,		dev_name(dev))

		__field(	unsigned long,		ip	)

		__field(	int,			ret	)

	),



	TP_fast_assign(

		__assign_str(name, dev_name(dev));

		__entry->ip = ip;

		__entry->ret = ret;

	),



	TP_printk("%pS:%s ret=%d", (void *)__entry->ip, __get_str(name),

		__entry->ret)

);



#endif /* _TRACE_RUNTIME_POWER_H */



/* This part must be outside protection */

#include <trace/define_trace.h>

kernel/trace/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ endif 
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o

obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o

obj-$(CONFIG_TRACEPOINTS) += power-traces.o

obj-$(CONFIG_TRACEPOINTS) += rpm-traces.o

ifeq ($(CONFIG_TRACING),y)

obj-$(CONFIG_KGDB_KDB) += trace_kdb.o

endif

kernel/trace/rpm-traces.c

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 * Power trace points

 *

 * Copyright (C) 2009 Ming Lei <ming.lei@canonical.com>

 */



#include <linux/string.h>

#include <linux/types.h>

#include <linux/workqueue.h>

#include <linux/sched.h>

#include <linux/module.h>

#include <linux/usb.h>



#define CREATE_TRACE_POINTS

#include <trace/events/rpm.h>



EXPORT_TRACEPOINT_SYMBOL_GPL(rpm_return_int);

EXPORT_TRACEPOINT_SYMBOL_GPL(rpm_idle);

EXPORT_TRACEPOINT_SYMBOL_GPL(rpm_suspend);

EXPORT_TRACEPOINT_SYMBOL_GPL(rpm_resume);