[linux-2.6-block.git] / include / trace / events / irq.h

#undef TRACE_SYSTEM
#define TRACE_SYSTEM irq

#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_IRQ_H

#include <linux/tracepoint.h>

struct irqaction;
struct softirq_action;

#define SOFTIRQ_NAME_LIST				\
			 softirq_name(HI)		\
			 softirq_name(TIMER)		\
			 softirq_name(NET_TX)		\
			 softirq_name(NET_RX)		\
			 softirq_name(BLOCK)		\
			 softirq_name(IRQ_POLL)		\
			 softirq_name(TASKLET)		\
			 softirq_name(SCHED)		\
			 softirq_name(HRTIMER)		\
			 softirq_name_end(RCU)

#undef softirq_name
#undef softirq_name_end

#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
#define softirq_name_end(sirq)  TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);

SOFTIRQ_NAME_LIST

#undef softirq_name
#undef softirq_name_end

#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }

#define show_softirq_name(val)				\
	__print_symbolic(val, SOFTIRQ_NAME_LIST)

/**
 * irq_handler_entry - called immediately before the irq action handler
 * @irq: irq number
 * @action: pointer to struct irqaction
 *
 * The struct irqaction pointed to by @action contains various
 * information about the handler, including the device name,
 * @action->name, and the device id, @action->dev_id. When used in
 * conjunction with the irq_handler_exit tracepoint, we can figure
 * out irq handler latencies.
 */
TRACE_EVENT(irq_handler_entry,

	TP_PROTO(int irq, struct irqaction *action),

	TP_ARGS(irq, action),

	TP_STRUCT__entry(
		__field(	int,	irq		)
		__string(	name,	action->name	)
	),

	TP_fast_assign(
		__entry->irq = irq;
		__assign_str(name, action->name);
	),

	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
);

/**
 * irq_handler_exit - called immediately after the irq action handler returns
 * @irq: irq number
 * @action: pointer to struct irqaction
 * @ret: return value
 *
 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
 * @action->handler scuccessully handled this irq. Otherwise, the irq might be
 * a shared irq line, or the irq was not handled successfully. Can be used in
 * conjunction with the irq_handler_entry to understand irq handler latencies.
 */
TRACE_EVENT(irq_handler_exit,

	TP_PROTO(int irq, struct irqaction *action, int ret),

	TP_ARGS(irq, action, ret),

	TP_STRUCT__entry(
		__field(	int,	irq	)
		__field(	int,	ret	)
	),

	TP_fast_assign(
		__entry->irq	= irq;
		__entry->ret	= ret;
	),

	TP_printk("irq=%d ret=%s",
		  __entry->irq, __entry->ret ? "handled" : "unhandled")
);

DECLARE_EVENT_CLASS(softirq,

	TP_PROTO(unsigned int vec_nr),

	TP_ARGS(vec_nr),

	TP_STRUCT__entry(
		__field(	unsigned int,	vec	)
	),

	TP_fast_assign(
		__entry->vec = vec_nr;
	),

	TP_printk("vec=%u [action=%s]", __entry->vec,
		  show_softirq_name(__entry->vec))
);

/**
 * softirq_entry - called immediately before the softirq handler
 * @vec_nr:  softirq vector number
 *
 * When used in combination with the softirq_exit tracepoint
 * we can determine the softirq handler routine.
 */
DEFINE_EVENT(softirq, softirq_entry,

	TP_PROTO(unsigned int vec_nr),

	TP_ARGS(vec_nr)
);

/**
 * softirq_exit - called immediately after the softirq handler returns
 * @vec_nr:  softirq vector number
 *
 * When used in combination with the softirq_entry tracepoint
 * we can determine the softirq handler routine.
 */
DEFINE_EVENT(softirq, softirq_exit,

	TP_PROTO(unsigned int vec_nr),

	TP_ARGS(vec_nr)
);

/**
 * softirq_raise - called immediately when a softirq is raised
 * @vec_nr:  softirq vector number
 *
 * When used in combination with the softirq_entry tracepoint
 * we can determine the softirq raise to run latency.
 */
DEFINE_EVENT(softirq, softirq_raise,

	TP_PROTO(unsigned int vec_nr),

	TP_ARGS(vec_nr)
);

#endif /*  _TRACE_IRQ_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
Commit	Line	Data
	1	#undef TRACE_SYSTEM
	2	#define TRACE_SYSTEM irq
	3
	4	#if !defined(_TRACE_IRQ_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	5	#define _TRACE_IRQ_H
	6
	7	#include <linux/tracepoint.h>
	8
	9	struct irqaction;
	10	struct softirq_action;
	11
	12	#define SOFTIRQ_NAME_LIST \
	13	softirq_name(HI) \
	14	softirq_name(TIMER) \
	15	softirq_name(NET_TX) \
	16	softirq_name(NET_RX) \
	17	softirq_name(BLOCK) \
	18	softirq_name(IRQ_POLL) \
	19	softirq_name(TASKLET) \
	20	softirq_name(SCHED) \
	21	softirq_name(HRTIMER) \
	22	softirq_name_end(RCU)
	23
	24	#undef softirq_name
	25	#undef softirq_name_end
	26
	27	#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
	28	#define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
	29
	30	SOFTIRQ_NAME_LIST
	31
	32	#undef softirq_name
	33	#undef softirq_name_end
	34
	35	#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
	36	#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
	37
	38	#define show_softirq_name(val) \
	39	__print_symbolic(val, SOFTIRQ_NAME_LIST)
	40
	41	/**
	42	* irq_handler_entry - called immediately before the irq action handler
	43	* @irq: irq number
	44	* @action: pointer to struct irqaction
	45	*
	46	* The struct irqaction pointed to by @action contains various
	47	* information about the handler, including the device name,
	48	* @action->name, and the device id, @action->dev_id. When used in
	49	* conjunction with the irq_handler_exit tracepoint, we can figure
	50	* out irq handler latencies.
	51	*/
	52	TRACE_EVENT(irq_handler_entry,
	53
	54	TP_PROTO(int irq, struct irqaction *action),
	55
	56	TP_ARGS(irq, action),
	57
	58	TP_STRUCT__entry(
	59	__field( int, irq )
	60	__string( name, action->name )
	61	),
	62
	63	TP_fast_assign(
	64	__entry->irq = irq;
	65	__assign_str(name, action->name);
	66	),
	67
	68	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
	69	);
	70
	71	/**
	72	* irq_handler_exit - called immediately after the irq action handler returns
	73	* @irq: irq number
	74	* @action: pointer to struct irqaction
	75	* @ret: return value
	76	*
	77	* If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
	78	* @action->handler scuccessully handled this irq. Otherwise, the irq might be
	79	* a shared irq line, or the irq was not handled successfully. Can be used in
	80	* conjunction with the irq_handler_entry to understand irq handler latencies.
	81	*/
	82	TRACE_EVENT(irq_handler_exit,
	83
	84	TP_PROTO(int irq, struct irqaction *action, int ret),
	85
	86	TP_ARGS(irq, action, ret),
	87
	88	TP_STRUCT__entry(
	89	__field( int, irq )
	90	__field( int, ret )
	91	),
	92
	93	TP_fast_assign(
	94	__entry->irq = irq;
	95	__entry->ret = ret;
	96	),
	97
	98	TP_printk("irq=%d ret=%s",
	99	__entry->irq, __entry->ret ? "handled" : "unhandled")
	100	);
	101
	102	DECLARE_EVENT_CLASS(softirq,
	103
	104	TP_PROTO(unsigned int vec_nr),
	105
	106	TP_ARGS(vec_nr),
	107
	108	TP_STRUCT__entry(
	109	__field( unsigned int, vec )
	110	),
	111
	112	TP_fast_assign(
	113	__entry->vec = vec_nr;
	114	),
	115
	116	TP_printk("vec=%u [action=%s]", __entry->vec,
	117	show_softirq_name(__entry->vec))
	118	);
	119
	120	/**
	121	* softirq_entry - called immediately before the softirq handler
	122	* @vec_nr: softirq vector number
	123	*
	124	* When used in combination with the softirq_exit tracepoint
	125	* we can determine the softirq handler routine.
	126	*/
	127	DEFINE_EVENT(softirq, softirq_entry,
	128
	129	TP_PROTO(unsigned int vec_nr),
	130
	131	TP_ARGS(vec_nr)
	132	);
	133
	134	/**
	135	* softirq_exit - called immediately after the softirq handler returns
	136	* @vec_nr: softirq vector number
	137	*
	138	* When used in combination with the softirq_entry tracepoint
	139	* we can determine the softirq handler routine.
	140	*/
	141	DEFINE_EVENT(softirq, softirq_exit,
	142
	143	TP_PROTO(unsigned int vec_nr),
	144
	145	TP_ARGS(vec_nr)
	146	);
	147
	148	/**
	149	* softirq_raise - called immediately when a softirq is raised
	150	* @vec_nr: softirq vector number
	151	*
	152	* When used in combination with the softirq_entry tracepoint
	153	* we can determine the softirq raise to run latency.
	154	*/
	155	DEFINE_EVENT(softirq, softirq_raise,
	156
	157	TP_PROTO(unsigned int vec_nr),
	158
	159	TP_ARGS(vec_nr)
	160	);
	161
	162	#endif /* _TRACE_IRQ_H */
	163
	164	/* This part must be outside protection */
	165	#include <trace/define_trace.h>