include/trace/events/timer.h

   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/hrtimer.h>
   9 #include <linux/timer.h>
  10
  11 /**
  12  * timer_init - called when the timer is initialized
  13  * @timer:      pointer to struct timer_list
  14  */
  15 TRACE_EVENT(timer_init,
  16
  17         TP_PROTO(struct timer_list *timer),
  18
  19         TP_ARGS(timer),
  20
  21         TP_STRUCT__entry(
  22                 __field( void *,        timer   )
  23         ),
  24
  25         TP_fast_assign(
  26                 __entry->timer  = timer;
  27         ),
  28
  29         TP_printk("timer %p", __entry->timer)
  30 );
  31
  32 /**
  33  * timer_start - called when the timer is started
  34  * @timer:      pointer to struct timer_list
  35  * @expires:    the timers expiry time
  36  */
  37 TRACE_EVENT(timer_start,
  38
  39         TP_PROTO(struct timer_list *timer, unsigned long expires),
  40
  41         TP_ARGS(timer, expires),
  42
  43         TP_STRUCT__entry(
  44                 __field( void *,        timer           )
  45                 __field( void *,        function        )
  46                 __field( unsigned long, expires         )
  47                 __field( unsigned long, now             )
  48         ),
  49
  50         TP_fast_assign(
  51                 __entry->timer          = timer;
  52                 __entry->function       = timer->function;
  53                 __entry->expires        = expires;
  54                 __entry->now            = jiffies;
  55         ),
  56
  57         TP_printk("timer %p: func %pf, expires %lu, timeout %ld",
  58                   __entry->timer, __entry->function, __entry->expires,
  59                   (long)__entry->expires - __entry->now)
  60 );
  61
  62 /**
  63  * timer_expire_entry - called immediately before the timer callback
  64  * @timer:      pointer to struct timer_list
  65  *
  66  * Allows to determine the timer latency.
  67  */
  68 TRACE_EVENT(timer_expire_entry,
  69
  70         TP_PROTO(struct timer_list *timer),
  71
  72         TP_ARGS(timer),
  73
  74         TP_STRUCT__entry(
  75                 __field( void *,        timer   )
  76                 __field( unsigned long, now     )
  77         ),
  78
  79         TP_fast_assign(
  80                 __entry->timer          = timer;
  81                 __entry->now            = jiffies;
  82         ),
  83
  84         TP_printk("timer %p: now %lu", __entry->timer, __entry->now)
  85 );
  86
  87 /**
  88  * timer_expire_exit - called immediately after the timer callback returns
  89  * @timer:      pointer to struct timer_list
  90  *
  91  * When used in combination with the timer_expire_entry tracepoint we can
  92  * determine the runtime of the timer callback function.
  93  *
  94  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
  95  * be invalid. We solely track the pointer.
  96  */
  97 TRACE_EVENT(timer_expire_exit,
  98
  99         TP_PROTO(struct timer_list *timer),
 100
 101         TP_ARGS(timer),
 102
 103         TP_STRUCT__entry(
 104                 __field(void *, timer   )
 105         ),
 106
 107         TP_fast_assign(
 108                 __entry->timer  = timer;
 109         ),
 110
 111         TP_printk("timer %p", __entry->timer)
 112 );
 113
 114 /**
 115  * timer_cancel - called when the timer is canceled
 116  * @timer:      pointer to struct timer_list
 117  */
 118 TRACE_EVENT(timer_cancel,
 119
 120         TP_PROTO(struct timer_list *timer),
 121
 122         TP_ARGS(timer),
 123
 124         TP_STRUCT__entry(
 125                 __field( void *,        timer   )
 126         ),
 127
 128         TP_fast_assign(
 129                 __entry->timer  = timer;
 130         ),
 131
 132         TP_printk("timer %p", __entry->timer)
 133 );
 134
 135 /**
 136  * hrtimer_init - called when the hrtimer is initialized
 137  * @timer:      pointer to struct hrtimer
 138  * @clockid:    the hrtimers clock
 139  * @mode:       the hrtimers mode
 140  */
 141 TRACE_EVENT(hrtimer_init,
 142
 143         TP_PROTO(struct hrtimer *timer, clockid_t clockid,
 144                  enum hrtimer_mode mode),
 145
 146         TP_ARGS(timer, clockid, mode),
 147
 148         TP_STRUCT__entry(
 149                 __field( void *,                timer           )
 150                 __field( clockid_t,             clockid         )
 151                 __field( enum hrtimer_mode,     mode            )
 152         ),
 153
 154         TP_fast_assign(
 155                 __entry->timer          = timer;
 156                 __entry->clockid        = clockid;
 157                 __entry->mode           = mode;
 158         ),
 159
 160         TP_printk("hrtimer %p, clockid %s, mode %s", __entry->timer,
 161                   __entry->clockid == CLOCK_REALTIME ?
 162                         "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
 163                   __entry->mode == HRTIMER_MODE_ABS ?
 164                         "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
 165 );
 166
 167 /**
 168  * hrtimer_start - called when the hrtimer is started
 169  * @timer: pointer to struct hrtimer
 170  */
 171 TRACE_EVENT(hrtimer_start,
 172
 173         TP_PROTO(struct hrtimer *timer),
 174
 175         TP_ARGS(timer),
 176
 177         TP_STRUCT__entry(
 178                 __field( void *,        timer           )
 179                 __field( void *,        function        )
 180                 __field( s64,           expires         )
 181                 __field( s64,           softexpires     )
 182         ),
 183
 184         TP_fast_assign(
 185                 __entry->timer          = timer;
 186                 __entry->function       = timer->function;
 187                 __entry->expires        = hrtimer_get_expires(timer).tv64;
 188                 __entry->softexpires    = hrtimer_get_softexpires(timer).tv64;
 189         ),
 190
 191         TP_printk("hrtimer %p, func %pf, expires %llu, softexpires %llu",
 192                   __entry->timer, __entry->function,
 193                   (unsigned long long)ktime_to_ns((ktime_t) {
 194                                   .tv64 = __entry->expires }),
 195                   (unsigned long long)ktime_to_ns((ktime_t) {
 196                                   .tv64 = __entry->softexpires }))
 197 );
 198
 199 /**
 200  * htimmer_expire_entry - called immediately before the hrtimer callback
 201  * @timer:      pointer to struct hrtimer
 202  * @now:        pointer to variable which contains current time of the
 203  *              timers base.
 204  *
 205  * Allows to determine the timer latency.
 206  */
 207 TRACE_EVENT(hrtimer_expire_entry,
 208
 209         TP_PROTO(struct hrtimer *timer, ktime_t *now),
 210
 211         TP_ARGS(timer, now),
 212
 213         TP_STRUCT__entry(
 214                 __field( void *,        timer   )
 215                 __field( s64,           now     )
 216         ),
 217
 218         TP_fast_assign(
 219                 __entry->timer  = timer;
 220                 __entry->now    = now->tv64;
 221         ),
 222
 223         TP_printk("hrtimer %p, now %llu", __entry->timer,
 224                   (unsigned long long)ktime_to_ns((ktime_t) {
 225                                   .tv64 = __entry->now }))
 226  );
 227
 228 /**
 229  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 230  * @timer:      pointer to struct hrtimer
 231  *
 232  * When used in combination with the hrtimer_expire_entry tracepoint we can
 233  * determine the runtime of the callback function.
 234  */
 235 TRACE_EVENT(hrtimer_expire_exit,
 236
 237         TP_PROTO(struct hrtimer *timer),
 238
 239         TP_ARGS(timer),
 240
 241         TP_STRUCT__entry(
 242                 __field( void *,        timer   )
 243         ),
 244
 245         TP_fast_assign(
 246                 __entry->timer  = timer;
 247         ),
 248
 249         TP_printk("hrtimer %p", __entry->timer)
 250 );
 251
 252 /**
 253  * hrtimer_cancel - called when the hrtimer is canceled
 254  * @timer:      pointer to struct hrtimer
 255  */
 256 TRACE_EVENT(hrtimer_cancel,
 257
 258         TP_PROTO(struct hrtimer *timer),
 259
 260         TP_ARGS(timer),
 261
 262         TP_STRUCT__entry(
 263                 __field( void *,        timer   )
 264         ),
 265
 266         TP_fast_assign(
 267                 __entry->timer  = timer;
 268         ),
 269
 270         TP_printk("hrtimer %p", __entry->timer)
 271 );
 272
 273 /**
 274  * itimer_state - called when itimer is started or canceled
 275  * @which:      name of the interval timer
 276  * @value:      the itimers value, itimer is canceled if value->it_value is
 277  *              zero, otherwise it is started
 278  * @expires:    the itimers expiry time
 279  */
 280 TRACE_EVENT(itimer_state,
 281
 282         TP_PROTO(int which, const struct itimerval *const value,
 283                  cputime_t expires),
 284
 285         TP_ARGS(which, value, expires),
 286
 287         TP_STRUCT__entry(
 288                 __field(        int,            which           )
 289                 __field(        cputime_t,      expires         )
 290                 __field(        long,           value_sec       )
 291                 __field(        long,           value_usec      )
 292                 __field(        long,           interval_sec    )
 293                 __field(        long,           interval_usec   )
 294         ),
 295
 296         TP_fast_assign(
 297                 __entry->which          = which;
 298                 __entry->expires        = expires;
 299                 __entry->value_sec      = value->it_value.tv_sec;
 300                 __entry->value_usec     = value->it_value.tv_usec;
 301                 __entry->interval_sec   = value->it_interval.tv_sec;
 302                 __entry->interval_usec  = value->it_interval.tv_usec;
 303         ),
 304
 305         TP_printk("which %d, expires %lu, it_value %lu.%lu, it_interval %lu.%lu",
 306                   __entry->which, __entry->expires,
 307                   __entry->value_sec, __entry->value_usec,
 308                   __entry->interval_sec, __entry->interval_usec)
 309 );
 310
 311 /**
 312  * itimer_expire - called when itimer expires
 313  * @which:      type of the interval timer
 314  * @pid:        pid of the process which owns the timer
 315  * @now:        current time, used to calculate the latency of itimer
 316  */
 317 TRACE_EVENT(itimer_expire,
 318
 319         TP_PROTO(int which, struct pid *pid, cputime_t now),
 320
 321         TP_ARGS(which, pid, now),
 322
 323         TP_STRUCT__entry(
 324                 __field( int ,          which   )
 325                 __field( pid_t,         pid     )
 326                 __field( cputime_t,     now     )
 327         ),
 328
 329         TP_fast_assign(
 330                 __entry->which  = which;
 331                 __entry->now    = now;
 332                 __entry->pid    = pid_nr(pid);
 333         ),
 334
 335             TP_printk("which %d, pid %d, now %lu", __entry->which,
 336                       (int) __entry->pid, __entry->now)
 337 );
 338
 339 #endif /*  _TRACE_TIMER_H */
 340
 341 /* This part must be outside protection */
 342 #include <trace/define_trace.h>