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