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 #define decode_timer_flags(flags)                       \
  40         __print_flags(flags, "|",                       \
  41                 {  TIMER_MIGRATING,     "M" },          \
  42                 {  TIMER_DEFERRABLE,    "D" },          \
  43                 {  TIMER_PINNED,        "P" },          \
  44                 {  TIMER_IRQSAFE,       "I" })
  45
  46 /**
  47  * timer_start - called when the timer is started
  48  * @timer:      pointer to struct timer_list
  49  * @expires:    the timers expiry time
  50  */
  51 TRACE_EVENT(timer_start,
  52
  53         TP_PROTO(struct timer_list *timer,
  54                 unsigned long expires,
  55                 unsigned int flags),
  56
  57         TP_ARGS(timer, expires, flags),
  58
  59         TP_STRUCT__entry(
  60                 __field( void *,        timer           )
  61                 __field( void *,        function        )
  62                 __field( unsigned long, expires         )
  63                 __field( unsigned long, now             )
  64                 __field( unsigned int,  flags           )
  65         ),
  66
  67         TP_fast_assign(
  68                 __entry->timer          = timer;
  69                 __entry->function       = timer->function;
  70                 __entry->expires        = expires;
  71                 __entry->now            = jiffies;
  72                 __entry->flags          = flags;
  73         ),
  74
  75         TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s",
  76                   __entry->timer, __entry->function, __entry->expires,
  77                   (long)__entry->expires - __entry->now,
  78                   __entry->flags & TIMER_CPUMASK,
  79                   __entry->flags >> TIMER_ARRAYSHIFT,
  80                   decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK))
  81 );
  82
  83 /**
  84  * timer_expire_entry - called immediately before the timer callback
  85  * @timer:      pointer to struct timer_list
  86  *
  87  * Allows to determine the timer latency.
  88  */
  89 TRACE_EVENT(timer_expire_entry,
  90
  91         TP_PROTO(struct timer_list *timer),
  92
  93         TP_ARGS(timer),
  94
  95         TP_STRUCT__entry(
  96                 __field( void *,        timer   )
  97                 __field( unsigned long, now     )
  98                 __field( void *,        function)
  99         ),
 100
 101         TP_fast_assign(
 102                 __entry->timer          = timer;
 103                 __entry->now            = jiffies;
 104                 __entry->function       = timer->function;
 105         ),
 106
 107         TP_printk("timer=%p function=%pf now=%lu", __entry->timer, __entry->function,__entry->now)
 108 );
 109
 110 /**
 111  * timer_expire_exit - called immediately after the timer callback returns
 112  * @timer:      pointer to struct timer_list
 113  *
 114  * When used in combination with the timer_expire_entry tracepoint we can
 115  * determine the runtime of the timer callback function.
 116  *
 117  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 118  * be invalid. We solely track the pointer.
 119  */
 120 DEFINE_EVENT(timer_class, timer_expire_exit,
 121
 122         TP_PROTO(struct timer_list *timer),
 123
 124         TP_ARGS(timer)
 125 );
 126
 127 /**
 128  * timer_cancel - called when the timer is canceled
 129  * @timer:      pointer to struct timer_list
 130  */
 131 DEFINE_EVENT(timer_class, timer_cancel,
 132
 133         TP_PROTO(struct timer_list *timer),
 134
 135         TP_ARGS(timer)
 136 );
 137
 138 /**
 139  * hrtimer_init - called when the hrtimer is initialized
 140  * @hrtimer:    pointer to struct hrtimer
 141  * @clockid:    the hrtimers clock
 142  * @mode:       the hrtimers mode
 143  */
 144 TRACE_EVENT(hrtimer_init,
 145
 146         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 147                  enum hrtimer_mode mode),
 148
 149         TP_ARGS(hrtimer, clockid, mode),
 150
 151         TP_STRUCT__entry(
 152                 __field( void *,                hrtimer         )
 153                 __field( clockid_t,             clockid         )
 154                 __field( enum hrtimer_mode,     mode            )
 155         ),
 156
 157         TP_fast_assign(
 158                 __entry->hrtimer        = hrtimer;
 159                 __entry->clockid        = clockid;
 160                 __entry->mode           = mode;
 161         ),
 162
 163         TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
 164                   __entry->clockid == CLOCK_REALTIME ?
 165                         "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
 166                   __entry->mode == HRTIMER_MODE_ABS ?
 167                         "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
 168 );
 169
 170 /**
 171  * hrtimer_start - called when the hrtimer is started
 172  * @hrtimer: pointer to struct hrtimer
 173  */
 174 TRACE_EVENT(hrtimer_start,
 175
 176         TP_PROTO(struct hrtimer *hrtimer),
 177
 178         TP_ARGS(hrtimer),
 179
 180         TP_STRUCT__entry(
 181                 __field( void *,        hrtimer         )
 182                 __field( void *,        function        )
 183                 __field( s64,           expires         )
 184                 __field( s64,           softexpires     )
 185         ),
 186
 187         TP_fast_assign(
 188                 __entry->hrtimer        = hrtimer;
 189                 __entry->function       = hrtimer->function;
 190                 __entry->expires        = hrtimer_get_expires(hrtimer);
 191                 __entry->softexpires    = hrtimer_get_softexpires(hrtimer);
 192         ),
 193
 194         TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu",
 195                   __entry->hrtimer, __entry->function,
 196                   (unsigned long long) __entry->expires,
 197                   (unsigned long long) __entry->softexpires)
 198 );
 199
 200 /**
 201  * hrtimer_expire_entry - called immediately before the hrtimer callback
 202  * @hrtimer:    pointer to struct hrtimer
 203  * @now:        pointer to variable which contains current time of the
 204  *              timers base.
 205  *
 206  * Allows to determine the timer latency.
 207  */
 208 TRACE_EVENT(hrtimer_expire_entry,
 209
 210         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 211
 212         TP_ARGS(hrtimer, now),
 213
 214         TP_STRUCT__entry(
 215                 __field( void *,        hrtimer )
 216                 __field( s64,           now     )
 217                 __field( void *,        function)
 218         ),
 219
 220         TP_fast_assign(
 221                 __entry->hrtimer        = hrtimer;
 222                 __entry->now            = *now;
 223                 __entry->function       = hrtimer->function;
 224         ),
 225
 226         TP_printk("hrtimer=%p function=%pf now=%llu", __entry->hrtimer, __entry->function,
 227                   (unsigned long long) __entry->now)
 228 );
 229
 230 DECLARE_EVENT_CLASS(hrtimer_class,
 231
 232         TP_PROTO(struct hrtimer *hrtimer),
 233
 234         TP_ARGS(hrtimer),
 235
 236         TP_STRUCT__entry(
 237                 __field( void *,        hrtimer )
 238         ),
 239
 240         TP_fast_assign(
 241                 __entry->hrtimer        = hrtimer;
 242         ),
 243
 244         TP_printk("hrtimer=%p", __entry->hrtimer)
 245 );
 246
 247 /**
 248  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 249  * @hrtimer:    pointer to struct hrtimer
 250  *
 251  * When used in combination with the hrtimer_expire_entry tracepoint we can
 252  * determine the runtime of the callback function.
 253  */
 254 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit,
 255
 256         TP_PROTO(struct hrtimer *hrtimer),
 257
 258         TP_ARGS(hrtimer)
 259 );
 260
 261 /**
 262  * hrtimer_cancel - called when the hrtimer is canceled
 263  * @hrtimer:    pointer to struct hrtimer
 264  */
 265 DEFINE_EVENT(hrtimer_class, hrtimer_cancel,
 266
 267         TP_PROTO(struct hrtimer *hrtimer),
 268
 269         TP_ARGS(hrtimer)
 270 );
 271
 272 /**
 273  * itimer_state - called when itimer is started or canceled
 274  * @which:      name of the interval timer
 275  * @value:      the itimers value, itimer is canceled if value->it_value is
 276  *              zero, otherwise it is started
 277  * @expires:    the itimers expiry time
 278  */
 279 TRACE_EVENT(itimer_state,
 280
 281         TP_PROTO(int which, const struct itimerval *const value,
 282                  unsigned long long expires),
 283
 284         TP_ARGS(which, value, expires),
 285
 286         TP_STRUCT__entry(
 287                 __field(        int,                    which           )
 288                 __field(        unsigned long long,     expires         )
 289                 __field(        long,                   value_sec       )
 290                 __field(        long,                   value_usec      )
 291                 __field(        long,                   interval_sec    )
 292                 __field(        long,                   interval_usec   )
 293         ),
 294
 295         TP_fast_assign(
 296                 __entry->which          = which;
 297                 __entry->expires        = expires;
 298                 __entry->value_sec      = value->it_value.tv_sec;
 299                 __entry->value_usec     = value->it_value.tv_usec;
 300                 __entry->interval_sec   = value->it_interval.tv_sec;
 301                 __entry->interval_usec  = value->it_interval.tv_usec;
 302         ),
 303
 304         TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld",
 305                   __entry->which, __entry->expires,
 306                   __entry->value_sec, __entry->value_usec,
 307                   __entry->interval_sec, __entry->interval_usec)
 308 );
 309
 310 /**
 311  * itimer_expire - called when itimer expires
 312  * @which:      type of the interval timer
 313  * @pid:        pid of the process which owns the timer
 314  * @now:        current time, used to calculate the latency of itimer
 315  */
 316 TRACE_EVENT(itimer_expire,
 317
 318         TP_PROTO(int which, struct pid *pid, unsigned long long now),
 319
 320         TP_ARGS(which, pid, now),
 321
 322         TP_STRUCT__entry(
 323                 __field( int ,                  which   )
 324                 __field( pid_t,                 pid     )
 325                 __field( unsigned long long,    now     )
 326         ),
 327
 328         TP_fast_assign(
 329                 __entry->which  = which;
 330                 __entry->now    = now;
 331                 __entry->pid    = pid_nr(pid);
 332         ),
 333
 334         TP_printk("which=%d pid=%d now=%llu", __entry->which,
 335                   (int) __entry->pid, __entry->now)
 336 );
 337
 338 #ifdef CONFIG_NO_HZ_COMMON
 339
 340 #define TICK_DEP_NAMES                                  \
 341                 tick_dep_mask_name(NONE)                \
 342                 tick_dep_name(POSIX_TIMER)              \
 343                 tick_dep_name(PERF_EVENTS)              \
 344                 tick_dep_name(SCHED)                    \
 345                 tick_dep_name_end(CLOCK_UNSTABLE)
 346
 347 #undef tick_dep_name
 348 #undef tick_dep_mask_name
 349 #undef tick_dep_name_end
 350
 351 /* The MASK will convert to their bits and they need to be processed too */
 352 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 353         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 354 #define tick_dep_name_end(sdep)  TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 355         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 356 /* NONE only has a mask defined for it */
 357 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 358
 359 TICK_DEP_NAMES
 360
 361 #undef tick_dep_name
 362 #undef tick_dep_mask_name
 363 #undef tick_dep_name_end
 364
 365 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 366 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 367 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep }
 368
 369 #define show_tick_dep_name(val)                         \
 370         __print_symbolic(val, TICK_DEP_NAMES)
 371
 372 TRACE_EVENT(tick_stop,
 373
 374         TP_PROTO(int success, int dependency),
 375
 376         TP_ARGS(success, dependency),
 377
 378         TP_STRUCT__entry(
 379                 __field( int ,          success )
 380                 __field( int ,          dependency )
 381         ),
 382
 383         TP_fast_assign(
 384                 __entry->success        = success;
 385                 __entry->dependency     = dependency;
 386         ),
 387
 388         TP_printk("success=%d dependency=%s",  __entry->success, \
 389                         show_tick_dep_name(__entry->dependency))
 390 );
 391 #endif
 392
 393 #endif /*  _TRACE_TIMER_H */
 394
 395 /* This part must be outside protection */
 396 #include <trace/define_trace.h>