include/trace/events/timer.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM timer
   4
   5 #if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define _TRACE_TIMER_H
   7
   8 #include <linux/tracepoint.h>
   9 #include <linux/hrtimer.h>
  10 #include <linux/timer.h>
  11
  12 DECLARE_EVENT_CLASS(timer_class,
  13
  14         TP_PROTO(struct timer_list *timer),
  15
  16         TP_ARGS(timer),
  17
  18         TP_STRUCT__entry(
  19                 __field( void *,        timer   )
  20         ),
  21
  22         TP_fast_assign(
  23                 __entry->timer  = timer;
  24         ),
  25
  26         TP_printk("timer=%p", __entry->timer)
  27 );
  28
  29 /**
  30  * timer_init - called when the timer is initialized
  31  * @timer:      pointer to struct timer_list
  32  */
  33 DEFINE_EVENT(timer_class, timer_init,
  34
  35         TP_PROTO(struct timer_list *timer),
  36
  37         TP_ARGS(timer)
  38 );
  39
  40 #define decode_timer_flags(flags)                       \
  41         __print_flags(flags, "|",                       \
  42                 {  TIMER_MIGRATING,     "M" },          \
  43                 {  TIMER_DEFERRABLE,    "D" },          \
  44                 {  TIMER_PINNED,        "P" },          \
  45                 {  TIMER_IRQSAFE,       "I" })
  46
  47 /**
  48  * timer_start - called when the timer is started
  49  * @timer:      pointer to struct timer_list
  50  * @expires:    the timers expiry time
  51  */
  52 TRACE_EVENT(timer_start,
  53
  54         TP_PROTO(struct timer_list *timer,
  55                 unsigned long expires,
  56                 unsigned int flags),
  57
  58         TP_ARGS(timer, expires, flags),
  59
  60         TP_STRUCT__entry(
  61                 __field( void *,        timer           )
  62                 __field( void *,        function        )
  63                 __field( unsigned long, expires         )
  64                 __field( unsigned long, now             )
  65                 __field( unsigned int,  flags           )
  66         ),
  67
  68         TP_fast_assign(
  69                 __entry->timer          = timer;
  70                 __entry->function       = timer->function;
  71                 __entry->expires        = expires;
  72                 __entry->now            = jiffies;
  73                 __entry->flags          = flags;
  74         ),
  75
  76         TP_printk("timer=%p function=%ps expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s",
  77                   __entry->timer, __entry->function, __entry->expires,
  78                   (long)__entry->expires - __entry->now,
  79                   __entry->flags & TIMER_CPUMASK,
  80                   __entry->flags >> TIMER_ARRAYSHIFT,
  81                   decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK))
  82 );
  83
  84 /**
  85  * timer_expire_entry - called immediately before the timer callback
  86  * @timer:      pointer to struct timer_list
  87  *
  88  * Allows to determine the timer latency.
  89  */
  90 TRACE_EVENT(timer_expire_entry,
  91
  92         TP_PROTO(struct timer_list *timer, unsigned long baseclk),
  93
  94         TP_ARGS(timer, baseclk),
  95
  96         TP_STRUCT__entry(
  97                 __field( void *,        timer   )
  98                 __field( unsigned long, now     )
  99                 __field( void *,        function)
 100                 __field( unsigned long, baseclk )
 101         ),
 102
 103         TP_fast_assign(
 104                 __entry->timer          = timer;
 105                 __entry->now            = jiffies;
 106                 __entry->function       = timer->function;
 107                 __entry->baseclk        = baseclk;
 108         ),
 109
 110         TP_printk("timer=%p function=%ps now=%lu baseclk=%lu",
 111                   __entry->timer, __entry->function, __entry->now,
 112                   __entry->baseclk)
 113 );
 114
 115 /**
 116  * timer_expire_exit - called immediately after the timer callback returns
 117  * @timer:      pointer to struct timer_list
 118  *
 119  * When used in combination with the timer_expire_entry tracepoint we can
 120  * determine the runtime of the timer callback function.
 121  *
 122  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 123  * be invalid. We solely track the pointer.
 124  */
 125 DEFINE_EVENT(timer_class, timer_expire_exit,
 126
 127         TP_PROTO(struct timer_list *timer),
 128
 129         TP_ARGS(timer)
 130 );
 131
 132 /**
 133  * timer_cancel - called when the timer is canceled
 134  * @timer:      pointer to struct timer_list
 135  */
 136 DEFINE_EVENT(timer_class, timer_cancel,
 137
 138         TP_PROTO(struct timer_list *timer),
 139
 140         TP_ARGS(timer)
 141 );
 142
 143 #define decode_clockid(type)                                            \
 144         __print_symbolic(type,                                          \
 145                 { CLOCK_REALTIME,       "CLOCK_REALTIME"        },      \
 146                 { CLOCK_MONOTONIC,      "CLOCK_MONOTONIC"       },      \
 147                 { CLOCK_BOOTTIME,       "CLOCK_BOOTTIME"        },      \
 148                 { CLOCK_TAI,            "CLOCK_TAI"             })
 149
 150 #define decode_hrtimer_mode(mode)                                       \
 151         __print_symbolic(mode,                                          \
 152                 { HRTIMER_MODE_ABS,             "ABS"           },      \
 153                 { HRTIMER_MODE_REL,             "REL"           },      \
 154                 { HRTIMER_MODE_ABS_PINNED,      "ABS|PINNED"    },      \
 155                 { HRTIMER_MODE_REL_PINNED,      "REL|PINNED"    },      \
 156                 { HRTIMER_MODE_ABS_SOFT,        "ABS|SOFT"      },      \
 157                 { HRTIMER_MODE_REL_SOFT,        "REL|SOFT"      },      \
 158                 { HRTIMER_MODE_ABS_PINNED_SOFT, "ABS|PINNED|SOFT" },    \
 159                 { HRTIMER_MODE_REL_PINNED_SOFT, "REL|PINNED|SOFT" })
 160
 161 /**
 162  * hrtimer_init - called when the hrtimer is initialized
 163  * @hrtimer:    pointer to struct hrtimer
 164  * @clockid:    the hrtimers clock
 165  * @mode:       the hrtimers mode
 166  */
 167 TRACE_EVENT(hrtimer_init,
 168
 169         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 170                  enum hrtimer_mode mode),
 171
 172         TP_ARGS(hrtimer, clockid, mode),
 173
 174         TP_STRUCT__entry(
 175                 __field( void *,                hrtimer         )
 176                 __field( clockid_t,             clockid         )
 177                 __field( enum hrtimer_mode,     mode            )
 178         ),
 179
 180         TP_fast_assign(
 181                 __entry->hrtimer        = hrtimer;
 182                 __entry->clockid        = clockid;
 183                 __entry->mode           = mode;
 184         ),
 185
 186         TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
 187                   decode_clockid(__entry->clockid),
 188                   decode_hrtimer_mode(__entry->mode))
 189 );
 190
 191 /**
 192  * hrtimer_start - called when the hrtimer is started
 193  * @hrtimer: pointer to struct hrtimer
 194  */
 195 TRACE_EVENT(hrtimer_start,
 196
 197         TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode),
 198
 199         TP_ARGS(hrtimer, mode),
 200
 201         TP_STRUCT__entry(
 202                 __field( void *,        hrtimer         )
 203                 __field( void *,        function        )
 204                 __field( s64,           expires         )
 205                 __field( s64,           softexpires     )
 206                 __field( enum hrtimer_mode,     mode    )
 207         ),
 208
 209         TP_fast_assign(
 210                 __entry->hrtimer        = hrtimer;
 211                 __entry->function       = hrtimer->function;
 212                 __entry->expires        = hrtimer_get_expires(hrtimer);
 213                 __entry->softexpires    = hrtimer_get_softexpires(hrtimer);
 214                 __entry->mode           = mode;
 215         ),
 216
 217         TP_printk("hrtimer=%p function=%ps expires=%llu softexpires=%llu "
 218                   "mode=%s", __entry->hrtimer, __entry->function,
 219                   (unsigned long long) __entry->expires,
 220                   (unsigned long long) __entry->softexpires,
 221                   decode_hrtimer_mode(__entry->mode))
 222 );
 223
 224 /**
 225  * hrtimer_expire_entry - called immediately before the hrtimer callback
 226  * @hrtimer:    pointer to struct hrtimer
 227  * @now:        pointer to variable which contains current time of the
 228  *              timers base.
 229  *
 230  * Allows to determine the timer latency.
 231  */
 232 TRACE_EVENT(hrtimer_expire_entry,
 233
 234         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 235
 236         TP_ARGS(hrtimer, now),
 237
 238         TP_STRUCT__entry(
 239                 __field( void *,        hrtimer )
 240                 __field( s64,           now     )
 241                 __field( void *,        function)
 242         ),
 243
 244         TP_fast_assign(
 245                 __entry->hrtimer        = hrtimer;
 246                 __entry->now            = *now;
 247                 __entry->function       = hrtimer->function;
 248         ),
 249
 250         TP_printk("hrtimer=%p function=%ps now=%llu",
 251                   __entry->hrtimer, __entry->function,
 252                   (unsigned long long) __entry->now)
 253 );
 254
 255 DECLARE_EVENT_CLASS(hrtimer_class,
 256
 257         TP_PROTO(struct hrtimer *hrtimer),
 258
 259         TP_ARGS(hrtimer),
 260
 261         TP_STRUCT__entry(
 262                 __field( void *,        hrtimer )
 263         ),
 264
 265         TP_fast_assign(
 266                 __entry->hrtimer        = hrtimer;
 267         ),
 268
 269         TP_printk("hrtimer=%p", __entry->hrtimer)
 270 );
 271
 272 /**
 273  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 274  * @hrtimer:    pointer to struct hrtimer
 275  *
 276  * When used in combination with the hrtimer_expire_entry tracepoint we can
 277  * determine the runtime of the callback function.
 278  */
 279 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit,
 280
 281         TP_PROTO(struct hrtimer *hrtimer),
 282
 283         TP_ARGS(hrtimer)
 284 );
 285
 286 /**
 287  * hrtimer_cancel - called when the hrtimer is canceled
 288  * @hrtimer:    pointer to struct hrtimer
 289  */
 290 DEFINE_EVENT(hrtimer_class, hrtimer_cancel,
 291
 292         TP_PROTO(struct hrtimer *hrtimer),
 293
 294         TP_ARGS(hrtimer)
 295 );
 296
 297 /**
 298  * itimer_state - called when itimer is started or canceled
 299  * @which:      name of the interval timer
 300  * @value:      the itimers value, itimer is canceled if value->it_value is
 301  *              zero, otherwise it is started
 302  * @expires:    the itimers expiry time
 303  */
 304 TRACE_EVENT(itimer_state,
 305
 306         TP_PROTO(int which, const struct itimerspec64 *const value,
 307                  unsigned long long expires),
 308
 309         TP_ARGS(which, value, expires),
 310
 311         TP_STRUCT__entry(
 312                 __field(        int,                    which           )
 313                 __field(        unsigned long long,     expires         )
 314                 __field(        long,                   value_sec       )
 315                 __field(        long,                   value_nsec      )
 316                 __field(        long,                   interval_sec    )
 317                 __field(        long,                   interval_nsec   )
 318         ),
 319
 320         TP_fast_assign(
 321                 __entry->which          = which;
 322                 __entry->expires        = expires;
 323                 __entry->value_sec      = value->it_value.tv_sec;
 324                 __entry->value_nsec     = value->it_value.tv_nsec;
 325                 __entry->interval_sec   = value->it_interval.tv_sec;
 326                 __entry->interval_nsec  = value->it_interval.tv_nsec;
 327         ),
 328
 329         TP_printk("which=%d expires=%llu it_value=%ld.%06ld it_interval=%ld.%06ld",
 330                   __entry->which, __entry->expires,
 331                   __entry->value_sec, __entry->value_nsec / NSEC_PER_USEC,
 332                   __entry->interval_sec, __entry->interval_nsec / NSEC_PER_USEC)
 333 );
 334
 335 /**
 336  * itimer_expire - called when itimer expires
 337  * @which:      type of the interval timer
 338  * @pid:        pid of the process which owns the timer
 339  * @now:        current time, used to calculate the latency of itimer
 340  */
 341 TRACE_EVENT(itimer_expire,
 342
 343         TP_PROTO(int which, struct pid *pid, unsigned long long now),
 344
 345         TP_ARGS(which, pid, now),
 346
 347         TP_STRUCT__entry(
 348                 __field( int ,                  which   )
 349                 __field( pid_t,                 pid     )
 350                 __field( unsigned long long,    now     )
 351         ),
 352
 353         TP_fast_assign(
 354                 __entry->which  = which;
 355                 __entry->now    = now;
 356                 __entry->pid    = pid_nr(pid);
 357         ),
 358
 359         TP_printk("which=%d pid=%d now=%llu", __entry->which,
 360                   (int) __entry->pid, __entry->now)
 361 );
 362
 363 #ifdef CONFIG_NO_HZ_COMMON
 364
 365 #define TICK_DEP_NAMES                                  \
 366                 tick_dep_mask_name(NONE)                \
 367                 tick_dep_name(POSIX_TIMER)              \
 368                 tick_dep_name(PERF_EVENTS)              \
 369                 tick_dep_name(SCHED)                    \
 370                 tick_dep_name(CLOCK_UNSTABLE)           \
 371                 tick_dep_name_end(RCU)
 372
 373 #undef tick_dep_name
 374 #undef tick_dep_mask_name
 375 #undef tick_dep_name_end
 376
 377 /* The MASK will convert to their bits and they need to be processed too */
 378 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 379         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 380 #define tick_dep_name_end(sdep)  TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 381         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 382 /* NONE only has a mask defined for it */
 383 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 384
 385 TICK_DEP_NAMES
 386
 387 #undef tick_dep_name
 388 #undef tick_dep_mask_name
 389 #undef tick_dep_name_end
 390
 391 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 392 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 393 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep }
 394
 395 #define show_tick_dep_name(val)                         \
 396         __print_symbolic(val, TICK_DEP_NAMES)
 397
 398 TRACE_EVENT(tick_stop,
 399
 400         TP_PROTO(int success, int dependency),
 401
 402         TP_ARGS(success, dependency),
 403
 404         TP_STRUCT__entry(
 405                 __field( int ,          success )
 406                 __field( int ,          dependency )
 407         ),
 408
 409         TP_fast_assign(
 410                 __entry->success        = success;
 411                 __entry->dependency     = dependency;
 412         ),
 413
 414         TP_printk("success=%d dependency=%s",  __entry->success, \
 415                         show_tick_dep_name(__entry->dependency))
 416 );
 417 #endif
 418
 419 #endif /*  _TRACE_TIMER_H */
 420
 421 /* This part must be outside protection */
 422 #include <trace/define_trace.h>