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 function=%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                 __field( void *,        function)
  78         ),
  79
  80         TP_fast_assign(
  81                 __entry->timer          = timer;
  82                 __entry->now            = jiffies;
  83                 __entry->function       = timer->function;
  84         ),
  85
  86         TP_printk("timer=%p function=%pf now=%lu", __entry->timer, __entry->function,__entry->now)
  87 );
  88
  89 /**
  90  * timer_expire_exit - called immediately after the timer callback returns
  91  * @timer:      pointer to struct timer_list
  92  *
  93  * When used in combination with the timer_expire_entry tracepoint we can
  94  * determine the runtime of the timer callback function.
  95  *
  96  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
  97  * be invalid. We solely track the pointer.
  98  */
  99 TRACE_EVENT(timer_expire_exit,
 100
 101         TP_PROTO(struct timer_list *timer),
 102
 103         TP_ARGS(timer),
 104
 105         TP_STRUCT__entry(
 106                 __field(void *, timer   )
 107         ),
 108
 109         TP_fast_assign(
 110                 __entry->timer  = timer;
 111         ),
 112
 113         TP_printk("timer=%p", __entry->timer)
 114 );
 115
 116 /**
 117  * timer_cancel - called when the timer is canceled
 118  * @timer:      pointer to struct timer_list
 119  */
 120 TRACE_EVENT(timer_cancel,
 121
 122         TP_PROTO(struct timer_list *timer),
 123
 124         TP_ARGS(timer),
 125
 126         TP_STRUCT__entry(
 127                 __field( void *,        timer   )
 128         ),
 129
 130         TP_fast_assign(
 131                 __entry->timer  = timer;
 132         ),
 133
 134         TP_printk("timer=%p", __entry->timer)
 135 );
 136
 137 /**
 138  * hrtimer_init - called when the hrtimer is initialized
 139  * @timer:      pointer to struct hrtimer
 140  * @clockid:    the hrtimers clock
 141  * @mode:       the hrtimers mode
 142  */
 143 TRACE_EVENT(hrtimer_init,
 144
 145         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 146                  enum hrtimer_mode mode),
 147
 148         TP_ARGS(hrtimer, clockid, mode),
 149
 150         TP_STRUCT__entry(
 151                 __field( void *,                hrtimer         )
 152                 __field( clockid_t,             clockid         )
 153                 __field( enum hrtimer_mode,     mode            )
 154         ),
 155
 156         TP_fast_assign(
 157                 __entry->hrtimer        = hrtimer;
 158                 __entry->clockid        = clockid;
 159                 __entry->mode           = mode;
 160         ),
 161
 162         TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
 163                   __entry->clockid == CLOCK_REALTIME ?
 164                         "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
 165                   __entry->mode == HRTIMER_MODE_ABS ?
 166                         "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
 167 );
 168
 169 /**
 170  * hrtimer_start - called when the hrtimer is started
 171  * @timer: pointer to struct hrtimer
 172  */
 173 TRACE_EVENT(hrtimer_start,
 174
 175         TP_PROTO(struct hrtimer *hrtimer),
 176
 177         TP_ARGS(hrtimer),
 178
 179         TP_STRUCT__entry(
 180                 __field( void *,        hrtimer         )
 181                 __field( void *,        function        )
 182                 __field( s64,           expires         )
 183                 __field( s64,           softexpires     )
 184         ),
 185
 186         TP_fast_assign(
 187                 __entry->hrtimer        = hrtimer;
 188                 __entry->function       = hrtimer->function;
 189                 __entry->expires        = hrtimer_get_expires(hrtimer).tv64;
 190                 __entry->softexpires    = hrtimer_get_softexpires(hrtimer).tv64;
 191         ),
 192
 193         TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu",
 194                   __entry->hrtimer, __entry->function,
 195                   (unsigned long long)ktime_to_ns((ktime_t) {
 196                                   .tv64 = __entry->expires }),
 197                   (unsigned long long)ktime_to_ns((ktime_t) {
 198                                   .tv64 = __entry->softexpires }))
 199 );
 200
 201 /**
 202  * htimmer_expire_entry - called immediately before the hrtimer callback
 203  * @timer:      pointer to struct hrtimer
 204  * @now:        pointer to variable which contains current time of the
 205  *              timers base.
 206  *
 207  * Allows to determine the timer latency.
 208  */
 209 TRACE_EVENT(hrtimer_expire_entry,
 210
 211         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 212
 213         TP_ARGS(hrtimer, now),
 214
 215         TP_STRUCT__entry(
 216                 __field( void *,        hrtimer )
 217                 __field( s64,           now     )
 218                 __field( void *,        function)
 219         ),
 220
 221         TP_fast_assign(
 222                 __entry->hrtimer        = hrtimer;
 223                 __entry->now            = now->tv64;
 224                 __entry->function       = hrtimer->function;
 225         ),
 226
 227         TP_printk("hrtimer=%p function=%pf now=%llu", __entry->hrtimer, __entry->function,
 228                   (unsigned long long)ktime_to_ns((ktime_t) { .tv64 = __entry->now }))
 229  );
 230
 231 /**
 232  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 233  * @timer:      pointer to struct hrtimer
 234  *
 235  * When used in combination with the hrtimer_expire_entry tracepoint we can
 236  * determine the runtime of the callback function.
 237  */
 238 TRACE_EVENT(hrtimer_expire_exit,
 239
 240         TP_PROTO(struct hrtimer *hrtimer),
 241
 242         TP_ARGS(hrtimer),
 243
 244         TP_STRUCT__entry(
 245                 __field( void *,        hrtimer )
 246         ),
 247
 248         TP_fast_assign(
 249                 __entry->hrtimer        = hrtimer;
 250         ),
 251
 252         TP_printk("hrtimer=%p", __entry->hrtimer)
 253 );
 254
 255 /**
 256  * hrtimer_cancel - called when the hrtimer is canceled
 257  * @hrtimer:    pointer to struct hrtimer
 258  */
 259 TRACE_EVENT(hrtimer_cancel,
 260
 261         TP_PROTO(struct hrtimer *hrtimer),
 262
 263         TP_ARGS(hrtimer),
 264
 265         TP_STRUCT__entry(
 266                 __field( void *,        hrtimer )
 267         ),
 268
 269         TP_fast_assign(
 270                 __entry->hrtimer        = hrtimer;
 271         ),
 272
 273         TP_printk("hrtimer=%p", __entry->hrtimer)
 274 );
 275
 276 /**
 277  * itimer_state - called when itimer is started or canceled
 278  * @which:      name of the interval timer
 279  * @value:      the itimers value, itimer is canceled if value->it_value is
 280  *              zero, otherwise it is started
 281  * @expires:    the itimers expiry time
 282  */
 283 TRACE_EVENT(itimer_state,
 284
 285         TP_PROTO(int which, const struct itimerval *const value,
 286                  cputime_t expires),
 287
 288         TP_ARGS(which, value, expires),
 289
 290         TP_STRUCT__entry(
 291                 __field(        int,            which           )
 292                 __field(        cputime_t,      expires         )
 293                 __field(        long,           value_sec       )
 294                 __field(        long,           value_usec      )
 295                 __field(        long,           interval_sec    )
 296                 __field(        long,           interval_usec   )
 297         ),
 298
 299         TP_fast_assign(
 300                 __entry->which          = which;
 301                 __entry->expires        = expires;
 302                 __entry->value_sec      = value->it_value.tv_sec;
 303                 __entry->value_usec     = value->it_value.tv_usec;
 304                 __entry->interval_sec   = value->it_interval.tv_sec;
 305                 __entry->interval_usec  = value->it_interval.tv_usec;
 306         ),
 307
 308         TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld",
 309                   __entry->which, (unsigned long long)__entry->expires,
 310                   __entry->value_sec, __entry->value_usec,
 311                   __entry->interval_sec, __entry->interval_usec)
 312 );
 313
 314 /**
 315  * itimer_expire - called when itimer expires
 316  * @which:      type of the interval timer
 317  * @pid:        pid of the process which owns the timer
 318  * @now:        current time, used to calculate the latency of itimer
 319  */
 320 TRACE_EVENT(itimer_expire,
 321
 322         TP_PROTO(int which, struct pid *pid, cputime_t now),
 323
 324         TP_ARGS(which, pid, now),
 325
 326         TP_STRUCT__entry(
 327                 __field( int ,          which   )
 328                 __field( pid_t,         pid     )
 329                 __field( cputime_t,     now     )
 330         ),
 331
 332         TP_fast_assign(
 333                 __entry->which  = which;
 334                 __entry->now    = now;
 335                 __entry->pid    = pid_nr(pid);
 336         ),
 337
 338         TP_printk("which=%d pid=%d now=%llu", __entry->which,
 339                   (int) __entry->pid, (unsigned long long)__entry->now)
 340 );
 341
 342 #endif /*  _TRACE_TIMER_H */
 343
 344 /* This part must be outside protection */
 345 #include <trace/define_trace.h>