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 DECLARE_EVENT_CLASS(timer_class,
  12
  13         TP_PROTO(struct timer_list *timer),
  14
  15         TP_ARGS(timer),
  16
  17         TP_STRUCT__entry(
  18                 __field( void *,        timer   )
  19         ),
  20
  21         TP_fast_assign(
  22                 __entry->timer  = timer;
  23         ),
  24
  25         TP_printk("timer=%p", __entry->timer)
  26 );
  27
  28 /**
  29  * timer_init - called when the timer is initialized
  30  * @timer:      pointer to struct timer_list
  31  */
  32 DEFINE_EVENT(timer_class, timer_init,
  33
  34         TP_PROTO(struct timer_list *timer),
  35
  36         TP_ARGS(timer)
  37 );
  38
  39 /**
  40  * timer_start - called when the timer is started
  41  * @timer:      pointer to struct timer_list
  42  * @expires:    the timers expiry time
  43  */
  44 TRACE_EVENT(timer_start,
  45
  46         TP_PROTO(struct timer_list *timer,
  47                 unsigned long expires,
  48                 unsigned int flags),
  49
  50         TP_ARGS(timer, expires, flags),
  51
  52         TP_STRUCT__entry(
  53                 __field( void *,        timer           )
  54                 __field( void *,        function        )
  55                 __field( unsigned long, expires         )
  56                 __field( unsigned long, now             )
  57                 __field( unsigned int,  flags           )
  58         ),
  59
  60         TP_fast_assign(
  61                 __entry->timer          = timer;
  62                 __entry->function       = timer->function;
  63                 __entry->expires        = expires;
  64                 __entry->now            = jiffies;
  65                 __entry->flags          = flags;
  66         ),
  67
  68         TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] flags=0x%08x",
  69                   __entry->timer, __entry->function, __entry->expires,
  70                   (long)__entry->expires - __entry->now, __entry->flags)
  71 );
  72
  73 /**
  74  * timer_expire_entry - called immediately before the timer callback
  75  * @timer:      pointer to struct timer_list
  76  *
  77  * Allows to determine the timer latency.
  78  */
  79 TRACE_EVENT(timer_expire_entry,
  80
  81         TP_PROTO(struct timer_list *timer),
  82
  83         TP_ARGS(timer),
  84
  85         TP_STRUCT__entry(
  86                 __field( void *,        timer   )
  87                 __field( unsigned long, now     )
  88                 __field( void *,        function)
  89         ),
  90
  91         TP_fast_assign(
  92                 __entry->timer          = timer;
  93                 __entry->now            = jiffies;
  94                 __entry->function       = timer->function;
  95         ),
  96
  97         TP_printk("timer=%p function=%pf now=%lu", __entry->timer, __entry->function,__entry->now)
  98 );
  99
 100 /**
 101  * timer_expire_exit - called immediately after the timer callback returns
 102  * @timer:      pointer to struct timer_list
 103  *
 104  * When used in combination with the timer_expire_entry tracepoint we can
 105  * determine the runtime of the timer callback function.
 106  *
 107  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 108  * be invalid. We solely track the pointer.
 109  */
 110 DEFINE_EVENT(timer_class, timer_expire_exit,
 111
 112         TP_PROTO(struct timer_list *timer),
 113
 114         TP_ARGS(timer)
 115 );
 116
 117 /**
 118  * timer_cancel - called when the timer is canceled
 119  * @timer:      pointer to struct timer_list
 120  */
 121 DEFINE_EVENT(timer_class, timer_cancel,
 122
 123         TP_PROTO(struct timer_list *timer),
 124
 125         TP_ARGS(timer)
 126 );
 127
 128 /**
 129  * hrtimer_init - called when the hrtimer is initialized
 130  * @hrtimer:    pointer to struct hrtimer
 131  * @clockid:    the hrtimers clock
 132  * @mode:       the hrtimers mode
 133  */
 134 TRACE_EVENT(hrtimer_init,
 135
 136         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 137                  enum hrtimer_mode mode),
 138
 139         TP_ARGS(hrtimer, clockid, mode),
 140
 141         TP_STRUCT__entry(
 142                 __field( void *,                hrtimer         )
 143                 __field( clockid_t,             clockid         )
 144                 __field( enum hrtimer_mode,     mode            )
 145         ),
 146
 147         TP_fast_assign(
 148                 __entry->hrtimer        = hrtimer;
 149                 __entry->clockid        = clockid;
 150                 __entry->mode           = mode;
 151         ),
 152
 153         TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
 154                   __entry->clockid == CLOCK_REALTIME ?
 155                         "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
 156                   __entry->mode == HRTIMER_MODE_ABS ?
 157                         "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
 158 );
 159
 160 /**
 161  * hrtimer_start - called when the hrtimer is started
 162  * @hrtimer: pointer to struct hrtimer
 163  */
 164 TRACE_EVENT(hrtimer_start,
 165
 166         TP_PROTO(struct hrtimer *hrtimer),
 167
 168         TP_ARGS(hrtimer),
 169
 170         TP_STRUCT__entry(
 171                 __field( void *,        hrtimer         )
 172                 __field( void *,        function        )
 173                 __field( s64,           expires         )
 174                 __field( s64,           softexpires     )
 175         ),
 176
 177         TP_fast_assign(
 178                 __entry->hrtimer        = hrtimer;
 179                 __entry->function       = hrtimer->function;
 180                 __entry->expires        = hrtimer_get_expires(hrtimer);
 181                 __entry->softexpires    = hrtimer_get_softexpires(hrtimer);
 182         ),
 183
 184         TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu",
 185                   __entry->hrtimer, __entry->function,
 186                   (unsigned long long) __entry->expires,
 187                   (unsigned long long) __entry->softexpires)
 188 );
 189
 190 /**
 191  * hrtimer_expire_entry - called immediately before the hrtimer callback
 192  * @hrtimer:    pointer to struct hrtimer
 193  * @now:        pointer to variable which contains current time of the
 194  *              timers base.
 195  *
 196  * Allows to determine the timer latency.
 197  */
 198 TRACE_EVENT(hrtimer_expire_entry,
 199
 200         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 201
 202         TP_ARGS(hrtimer, now),
 203
 204         TP_STRUCT__entry(
 205                 __field( void *,        hrtimer )
 206                 __field( s64,           now     )
 207                 __field( void *,        function)
 208         ),
 209
 210         TP_fast_assign(
 211                 __entry->hrtimer        = hrtimer;
 212                 __entry->now            = *now;
 213                 __entry->function       = hrtimer->function;
 214         ),
 215
 216         TP_printk("hrtimer=%p function=%pf now=%llu", __entry->hrtimer, __entry->function,
 217                   (unsigned long long) __entry->now)
 218 );
 219
 220 DECLARE_EVENT_CLASS(hrtimer_class,
 221
 222         TP_PROTO(struct hrtimer *hrtimer),
 223
 224         TP_ARGS(hrtimer),
 225
 226         TP_STRUCT__entry(
 227                 __field( void *,        hrtimer )
 228         ),
 229
 230         TP_fast_assign(
 231                 __entry->hrtimer        = hrtimer;
 232         ),
 233
 234         TP_printk("hrtimer=%p", __entry->hrtimer)
 235 );
 236
 237 /**
 238  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 239  * @hrtimer:    pointer to struct hrtimer
 240  *
 241  * When used in combination with the hrtimer_expire_entry tracepoint we can
 242  * determine the runtime of the callback function.
 243  */
 244 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit,
 245
 246         TP_PROTO(struct hrtimer *hrtimer),
 247
 248         TP_ARGS(hrtimer)
 249 );
 250
 251 /**
 252  * hrtimer_cancel - called when the hrtimer is canceled
 253  * @hrtimer:    pointer to struct hrtimer
 254  */
 255 DEFINE_EVENT(hrtimer_class, hrtimer_cancel,
 256
 257         TP_PROTO(struct hrtimer *hrtimer),
 258
 259         TP_ARGS(hrtimer)
 260 );
 261
 262 /**
 263  * itimer_state - called when itimer is started or canceled
 264  * @which:      name of the interval timer
 265  * @value:      the itimers value, itimer is canceled if value->it_value is
 266  *              zero, otherwise it is started
 267  * @expires:    the itimers expiry time
 268  */
 269 TRACE_EVENT(itimer_state,
 270
 271         TP_PROTO(int which, const struct itimerval *const value,
 272                  unsigned long long expires),
 273
 274         TP_ARGS(which, value, expires),
 275
 276         TP_STRUCT__entry(
 277                 __field(        int,                    which           )
 278                 __field(        unsigned long long,     expires         )
 279                 __field(        long,                   value_sec       )
 280                 __field(        long,                   value_usec      )
 281                 __field(        long,                   interval_sec    )
 282                 __field(        long,                   interval_usec   )
 283         ),
 284
 285         TP_fast_assign(
 286                 __entry->which          = which;
 287                 __entry->expires        = expires;
 288                 __entry->value_sec      = value->it_value.tv_sec;
 289                 __entry->value_usec     = value->it_value.tv_usec;
 290                 __entry->interval_sec   = value->it_interval.tv_sec;
 291                 __entry->interval_usec  = value->it_interval.tv_usec;
 292         ),
 293
 294         TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld",
 295                   __entry->which, __entry->expires,
 296                   __entry->value_sec, __entry->value_usec,
 297                   __entry->interval_sec, __entry->interval_usec)
 298 );
 299
 300 /**
 301  * itimer_expire - called when itimer expires
 302  * @which:      type of the interval timer
 303  * @pid:        pid of the process which owns the timer
 304  * @now:        current time, used to calculate the latency of itimer
 305  */
 306 TRACE_EVENT(itimer_expire,
 307
 308         TP_PROTO(int which, struct pid *pid, unsigned long long now),
 309
 310         TP_ARGS(which, pid, now),
 311
 312         TP_STRUCT__entry(
 313                 __field( int ,                  which   )
 314                 __field( pid_t,                 pid     )
 315                 __field( unsigned long long,    now     )
 316         ),
 317
 318         TP_fast_assign(
 319                 __entry->which  = which;
 320                 __entry->now    = now;
 321                 __entry->pid    = pid_nr(pid);
 322         ),
 323
 324         TP_printk("which=%d pid=%d now=%llu", __entry->which,
 325                   (int) __entry->pid, __entry->now)
 326 );
 327
 328 #ifdef CONFIG_NO_HZ_COMMON
 329
 330 #define TICK_DEP_NAMES                                  \
 331                 tick_dep_mask_name(NONE)                \
 332                 tick_dep_name(POSIX_TIMER)              \
 333                 tick_dep_name(PERF_EVENTS)              \
 334                 tick_dep_name(SCHED)                    \
 335                 tick_dep_name_end(CLOCK_UNSTABLE)
 336
 337 #undef tick_dep_name
 338 #undef tick_dep_mask_name
 339 #undef tick_dep_name_end
 340
 341 /* The MASK will convert to their bits and they need to be processed too */
 342 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 343         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 344 #define tick_dep_name_end(sdep)  TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 345         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 346 /* NONE only has a mask defined for it */
 347 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 348
 349 TICK_DEP_NAMES
 350
 351 #undef tick_dep_name
 352 #undef tick_dep_mask_name
 353 #undef tick_dep_name_end
 354
 355 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 356 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 357 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep }
 358
 359 #define show_tick_dep_name(val)                         \
 360         __print_symbolic(val, TICK_DEP_NAMES)
 361
 362 TRACE_EVENT(tick_stop,
 363
 364         TP_PROTO(int success, int dependency),
 365
 366         TP_ARGS(success, dependency),
 367
 368         TP_STRUCT__entry(
 369                 __field( int ,          success )
 370                 __field( int ,          dependency )
 371         ),
 372
 373         TP_fast_assign(
 374                 __entry->success        = success;
 375                 __entry->dependency     = dependency;
 376         ),
 377
 378         TP_printk("success=%d dependency=%s",  __entry->success, \
 379                         show_tick_dep_name(__entry->dependency))
 380 );
 381 #endif
 382
 383 #endif /*  _TRACE_TIMER_H */
 384
 385 /* This part must be outside protection */
 386 #include <trace/define_trace.h>