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