138 lines
2.7 KiB
C
138 lines
2.7 KiB
C
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM timer
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#if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_TIMER_H
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#include <linux/tracepoint.h>
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#include <linux/timer.h>
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/**
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* timer_init - called when the timer is initialized
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* @timer: pointer to struct timer_list
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*/
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TRACE_EVENT(timer_init,
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TP_PROTO(struct timer_list *timer),
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TP_ARGS(timer),
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TP_STRUCT__entry(
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__field( void *, timer )
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),
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TP_fast_assign(
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__entry->timer = timer;
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),
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TP_printk("timer %p", __entry->timer)
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);
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/**
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* timer_start - called when the timer is started
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* @timer: pointer to struct timer_list
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* @expires: the timers expiry time
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*/
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TRACE_EVENT(timer_start,
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TP_PROTO(struct timer_list *timer, unsigned long expires),
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TP_ARGS(timer, expires),
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TP_STRUCT__entry(
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__field( void *, timer )
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__field( void *, function )
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__field( unsigned long, expires )
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__field( unsigned long, now )
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),
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TP_fast_assign(
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__entry->timer = timer;
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__entry->function = timer->function;
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__entry->expires = expires;
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__entry->now = jiffies;
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),
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TP_printk("timer %p: func %pf, expires %lu, timeout %ld",
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__entry->timer, __entry->function, __entry->expires,
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(long)__entry->expires - __entry->now)
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);
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/**
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* timer_expire_entry - called immediately before the timer callback
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* @timer: pointer to struct timer_list
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*
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* Allows to determine the timer latency.
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*/
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TRACE_EVENT(timer_expire_entry,
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TP_PROTO(struct timer_list *timer),
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TP_ARGS(timer),
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TP_STRUCT__entry(
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__field( void *, timer )
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__field( unsigned long, now )
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),
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TP_fast_assign(
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__entry->timer = timer;
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__entry->now = jiffies;
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),
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TP_printk("timer %p: now %lu", __entry->timer, __entry->now)
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);
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/**
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* timer_expire_exit - called immediately after the timer callback returns
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* @timer: pointer to struct timer_list
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*
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* When used in combination with the timer_expire_entry tracepoint we can
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* determine the runtime of the timer callback function.
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*
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* NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
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* be invalid. We solely track the pointer.
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*/
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TRACE_EVENT(timer_expire_exit,
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TP_PROTO(struct timer_list *timer),
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TP_ARGS(timer),
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TP_STRUCT__entry(
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__field(void *, timer )
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),
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TP_fast_assign(
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__entry->timer = timer;
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),
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TP_printk("timer %p", __entry->timer)
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);
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/**
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* timer_cancel - called when the timer is canceled
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* @timer: pointer to struct timer_list
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*/
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TRACE_EVENT(timer_cancel,
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TP_PROTO(struct timer_list *timer),
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TP_ARGS(timer),
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TP_STRUCT__entry(
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__field( void *, timer )
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),
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TP_fast_assign(
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__entry->timer = timer;
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),
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TP_printk("timer %p", __entry->timer)
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);
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#endif /* _TRACE_TIMER_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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