include/trace/events/irq.h

Source file repositories/reference/linux-study-clean/include/trace/events/irq.h

File Facts

System
Linux kernel
Corpus path
include/trace/events/irq.h
Extension
.h
Size
4809 bytes
Lines
214
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#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);
	),

	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	)

Annotation

Implementation Notes