Release 4.12 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 successfully 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>
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Directory: include/trace/events

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