irq.h
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#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(sirq) { sirq##_SOFTIRQ, #sirq }
#define show_softirq_name(val) \
__print_symbolic(val, \
softirq_name(HI), \
softirq_name(TIMER), \
softirq_name(NET_TX), \
softirq_name(NET_RX), \
softirq_name(BLOCK), \
softirq_name(BLOCK_IOPOLL), \
softirq_name(TASKLET), \
softirq_name(SCHED), \
softirq_name(HRTIMER), \
softirq_name(RCU))
/**
* 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 runtine.
*/
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 runtine.
*/
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>