PM / Runtime: Introduce trace points for tracing rpm_* functions (53b615cc) · Commits · 戴 / test

include/trace/events/rpm.h

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		#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

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		@@ -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

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		/*
		* 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);

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