| Xiao Guangrong | 2b022e3 | 2009-08-10 10:48:59 +0800 | [diff] [blame^] | 1 | #undef TRACE_SYSTEM |
| 2 | #define TRACE_SYSTEM timer |
| 3 | |
| 4 | #if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ) |
| 5 | #define _TRACE_TIMER_H |
| 6 | |
| 7 | #include <linux/tracepoint.h> |
| 8 | #include <linux/timer.h> |
| 9 | |
| 10 | /** |
| 11 | * timer_init - called when the timer is initialized |
| 12 | * @timer: pointer to struct timer_list |
| 13 | */ |
| 14 | TRACE_EVENT(timer_init, |
| 15 | |
| 16 | TP_PROTO(struct timer_list *timer), |
| 17 | |
| 18 | TP_ARGS(timer), |
| 19 | |
| 20 | TP_STRUCT__entry( |
| 21 | __field( void *, timer ) |
| 22 | ), |
| 23 | |
| 24 | TP_fast_assign( |
| 25 | __entry->timer = timer; |
| 26 | ), |
| 27 | |
| 28 | TP_printk("timer %p", __entry->timer) |
| 29 | ); |
| 30 | |
| 31 | /** |
| 32 | * timer_start - called when the timer is started |
| 33 | * @timer: pointer to struct timer_list |
| 34 | * @expires: the timers expiry time |
| 35 | */ |
| 36 | TRACE_EVENT(timer_start, |
| 37 | |
| 38 | TP_PROTO(struct timer_list *timer, unsigned long expires), |
| 39 | |
| 40 | TP_ARGS(timer, expires), |
| 41 | |
| 42 | TP_STRUCT__entry( |
| 43 | __field( void *, timer ) |
| 44 | __field( void *, function ) |
| 45 | __field( unsigned long, expires ) |
| 46 | __field( unsigned long, now ) |
| 47 | ), |
| 48 | |
| 49 | TP_fast_assign( |
| 50 | __entry->timer = timer; |
| 51 | __entry->function = timer->function; |
| 52 | __entry->expires = expires; |
| 53 | __entry->now = jiffies; |
| 54 | ), |
| 55 | |
| 56 | TP_printk("timer %p: func %pf, expires %lu, timeout %ld", |
| 57 | __entry->timer, __entry->function, __entry->expires, |
| 58 | (long)__entry->expires - __entry->now) |
| 59 | ); |
| 60 | |
| 61 | /** |
| 62 | * timer_expire_entry - called immediately before the timer callback |
| 63 | * @timer: pointer to struct timer_list |
| 64 | * |
| 65 | * Allows to determine the timer latency. |
| 66 | */ |
| 67 | TRACE_EVENT(timer_expire_entry, |
| 68 | |
| 69 | TP_PROTO(struct timer_list *timer), |
| 70 | |
| 71 | TP_ARGS(timer), |
| 72 | |
| 73 | TP_STRUCT__entry( |
| 74 | __field( void *, timer ) |
| 75 | __field( unsigned long, now ) |
| 76 | ), |
| 77 | |
| 78 | TP_fast_assign( |
| 79 | __entry->timer = timer; |
| 80 | __entry->now = jiffies; |
| 81 | ), |
| 82 | |
| 83 | TP_printk("timer %p: now %lu", __entry->timer, __entry->now) |
| 84 | ); |
| 85 | |
| 86 | /** |
| 87 | * timer_expire_exit - called immediately after the timer callback returns |
| 88 | * @timer: pointer to struct timer_list |
| 89 | * |
| 90 | * When used in combination with the timer_expire_entry tracepoint we can |
| 91 | * determine the runtime of the timer callback function. |
| 92 | * |
| 93 | * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might |
| 94 | * be invalid. We solely track the pointer. |
| 95 | */ |
| 96 | TRACE_EVENT(timer_expire_exit, |
| 97 | |
| 98 | TP_PROTO(struct timer_list *timer), |
| 99 | |
| 100 | TP_ARGS(timer), |
| 101 | |
| 102 | TP_STRUCT__entry( |
| 103 | __field(void *, timer ) |
| 104 | ), |
| 105 | |
| 106 | TP_fast_assign( |
| 107 | __entry->timer = timer; |
| 108 | ), |
| 109 | |
| 110 | TP_printk("timer %p", __entry->timer) |
| 111 | ); |
| 112 | |
| 113 | /** |
| 114 | * timer_cancel - called when the timer is canceled |
| 115 | * @timer: pointer to struct timer_list |
| 116 | */ |
| 117 | TRACE_EVENT(timer_cancel, |
| 118 | |
| 119 | TP_PROTO(struct timer_list *timer), |
| 120 | |
| 121 | TP_ARGS(timer), |
| 122 | |
| 123 | TP_STRUCT__entry( |
| 124 | __field( void *, timer ) |
| 125 | ), |
| 126 | |
| 127 | TP_fast_assign( |
| 128 | __entry->timer = timer; |
| 129 | ), |
| 130 | |
| 131 | TP_printk("timer %p", __entry->timer) |
| 132 | ); |
| 133 | |
| 134 | #endif /* _TRACE_TIMER_H */ |
| 135 | |
| 136 | /* This part must be outside protection */ |
| 137 | #include <trace/define_trace.h> |