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=%pf 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),
  93
  94         TP_ARGS(timer),
  95
  96         TP_STRUCT__entry(
  97                 __field( void *,        timer   )
  98                 __field( unsigned long, now     )
  99                 __field( void *,        function)
 100         ),
 101
 102         TP_fast_assign(
 103                 __entry->timer          = timer;
 104                 __entry->now            = jiffies;
 105                 __entry->function       = timer->function;
 106         ),
 107
 108         TP_printk("timer=%p function=%pf now=%lu", __entry->timer, __entry->function,__entry->now)
 109 );
 110
 111 /**
 112  * timer_expire_exit - called immediately after the timer callback returns
 113  * @timer:      pointer to struct timer_list
 114  *
 115  * When used in combination with the timer_expire_entry tracepoint we can
 116  * determine the runtime of the timer callback function.
 117  *
 118  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 119  * be invalid. We solely track the pointer.
 120  */
 121 DEFINE_EVENT(timer_class, timer_expire_exit,
 122
 123         TP_PROTO(struct timer_list *timer),
 124
 125         TP_ARGS(timer)
 126 );
 127
 128 /**
 129  * timer_cancel - called when the timer is canceled
 130  * @timer:      pointer to struct timer_list
 131  */
 132 DEFINE_EVENT(timer_class, timer_cancel,
 133
 134         TP_PROTO(struct timer_list *timer),
 135
 136         TP_ARGS(timer)
 137 );
 138
 139 #define decode_clockid(type)                                            \
 140         __print_symbolic(type,                                          \
 141                 { CLOCK_REALTIME,       "CLOCK_REALTIME"        },      \
 142                 { CLOCK_MONOTONIC,      "CLOCK_MONOTONIC"       },      \
 143                 { CLOCK_BOOTTIME,       "CLOCK_BOOTTIME"        },      \
 144                 { CLOCK_TAI,            "CLOCK_TAI"             })
 145
 146 #define decode_hrtimer_mode(mode)                                       \
 147         __print_symbolic(mode,                                          \
 148                 { HRTIMER_MODE_ABS,             "ABS"           },      \
 149                 { HRTIMER_MODE_REL,             "REL"           },      \
 150                 { HRTIMER_MODE_ABS_PINNED,      "ABS|PINNED"    },      \
 151                 { HRTIMER_MODE_REL_PINNED,      "REL|PINNED"    },      \
 152                 { HRTIMER_MODE_ABS_SOFT,        "ABS|SOFT"      },      \
 153                 { HRTIMER_MODE_REL_SOFT,        "REL|SOFT"      },      \
 154                 { HRTIMER_MODE_ABS_PINNED_SOFT, "ABS|PINNED|SOFT" },    \
 155                 { HRTIMER_MODE_REL_PINNED_SOFT, "REL|PINNED|SOFT" })
 156
 157 /**
 158  * hrtimer_init - called when the hrtimer is initialized
 159  * @hrtimer:    pointer to struct hrtimer
 160  * @clockid:    the hrtimers clock
 161  * @mode:       the hrtimers mode
 162  */
 163 TRACE_EVENT(hrtimer_init,
 164
 165         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 166                  enum hrtimer_mode mode),
 167
 168         TP_ARGS(hrtimer, clockid, mode),
 169
 170         TP_STRUCT__entry(
 171                 __field( void *,                hrtimer         )
 172                 __field( clockid_t,             clockid         )
 173                 __field( enum hrtimer_mode,     mode            )
 174         ),
 175
 176         TP_fast_assign(
 177                 __entry->hrtimer        = hrtimer;
 178                 __entry->clockid        = clockid;
 179                 __entry->mode           = mode;
 180         ),
 181
 182         TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
 183                   decode_clockid(__entry->clockid),
 184                   decode_hrtimer_mode(__entry->mode))
 185 );
 186
 187 /**
 188  * hrtimer_start - called when the hrtimer is started
 189  * @hrtimer: pointer to struct hrtimer
 190  */
 191 TRACE_EVENT(hrtimer_start,
 192
 193         TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode),
 194
 195         TP_ARGS(hrtimer, mode),
 196
 197         TP_STRUCT__entry(
 198                 __field( void *,        hrtimer         )
 199                 __field( void *,        function        )
 200                 __field( s64,           expires         )
 201                 __field( s64,           softexpires     )
 202                 __field( enum hrtimer_mode,     mode    )
 203         ),
 204
 205         TP_fast_assign(
 206                 __entry->hrtimer        = hrtimer;
 207                 __entry->function       = hrtimer->function;
 208                 __entry->expires        = hrtimer_get_expires(hrtimer);
 209                 __entry->softexpires    = hrtimer_get_softexpires(hrtimer);
 210                 __entry->mode           = mode;
 211         ),
 212
 213         TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu "
 214                   "mode=%s", __entry->hrtimer, __entry->function,
 215                   (unsigned long long) __entry->expires,
 216                   (unsigned long long) __entry->softexpires,
 217                   decode_hrtimer_mode(__entry->mode))
 218 );
 219
 220 /**
 221  * hrtimer_expire_entry - called immediately before the hrtimer callback
 222  * @hrtimer:    pointer to struct hrtimer
 223  * @now:        pointer to variable which contains current time of the
 224  *              timers base.
 225  *
 226  * Allows to determine the timer latency.
 227  */
 228 TRACE_EVENT(hrtimer_expire_entry,
 229
 230         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 231
 232         TP_ARGS(hrtimer, now),
 233
 234         TP_STRUCT__entry(
 235                 __field( void *,        hrtimer )
 236                 __field( s64,           now     )
 237                 __field( void *,        function)
 238         ),
 239
 240         TP_fast_assign(
 241                 __entry->hrtimer        = hrtimer;
 242                 __entry->now            = *now;
 243                 __entry->function       = hrtimer->function;
 244         ),
 245
 246         TP_printk("hrtimer=%p function=%pf now=%llu", __entry->hrtimer, __entry->function,
 247                   (unsigned long long) __entry->now)
 248 );
 249
 250 DECLARE_EVENT_CLASS(hrtimer_class,
 251
 252         TP_PROTO(struct hrtimer *hrtimer),
 253
 254         TP_ARGS(hrtimer),
 255
 256         TP_STRUCT__entry(
 257                 __field( void *,        hrtimer )
 258         ),
 259
 260         TP_fast_assign(
 261                 __entry->hrtimer        = hrtimer;
 262         ),
 263
 264         TP_printk("hrtimer=%p", __entry->hrtimer)
 265 );
 266
 267 /**
 268  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 269  * @hrtimer:    pointer to struct hrtimer
 270  *
 271  * When used in combination with the hrtimer_expire_entry tracepoint we can
 272  * determine the runtime of the callback function.
 273  */
 274 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit,
 275
 276         TP_PROTO(struct hrtimer *hrtimer),
 277
 278         TP_ARGS(hrtimer)
 279 );
 280
 281 /**
 282  * hrtimer_cancel - called when the hrtimer is canceled
 283  * @hrtimer:    pointer to struct hrtimer
 284  */
 285 DEFINE_EVENT(hrtimer_class, hrtimer_cancel,
 286
 287         TP_PROTO(struct hrtimer *hrtimer),
 288
 289         TP_ARGS(hrtimer)
 290 );
 291
 292 /**
 293  * itimer_state - called when itimer is started or canceled
 294  * @which:      name of the interval timer
 295  * @value:      the itimers value, itimer is canceled if value->it_value is
 296  *              zero, otherwise it is started
 297  * @expires:    the itimers expiry time
 298  */
 299 TRACE_EVENT(itimer_state,
 300
 301         TP_PROTO(int which, const struct itimerval *const value,
 302                  unsigned long long expires),
 303
 304         TP_ARGS(which, value, expires),
 305
 306         TP_STRUCT__entry(
 307                 __field(        int,                    which           )
 308                 __field(        unsigned long long,     expires         )
 309                 __field(        long,                   value_sec       )
 310                 __field(        long,                   value_usec      )
 311                 __field(        long,                   interval_sec    )
 312                 __field(        long,                   interval_usec   )
 313         ),
 314
 315         TP_fast_assign(
 316                 __entry->which          = which;
 317                 __entry->expires        = expires;
 318                 __entry->value_sec      = value->it_value.tv_sec;
 319                 __entry->value_usec     = value->it_value.tv_usec;
 320                 __entry->interval_sec   = value->it_interval.tv_sec;
 321                 __entry->interval_usec  = value->it_interval.tv_usec;
 322         ),
 323
 324         TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld",
 325                   __entry->which, __entry->expires,
 326                   __entry->value_sec, __entry->value_usec,
 327                   __entry->interval_sec, __entry->interval_usec)
 328 );
 329
 330 /**
 331  * itimer_expire - called when itimer expires
 332  * @which:      type of the interval timer
 333  * @pid:        pid of the process which owns the timer
 334  * @now:        current time, used to calculate the latency of itimer
 335  */
 336 TRACE_EVENT(itimer_expire,
 337
 338         TP_PROTO(int which, struct pid *pid, unsigned long long now),
 339
 340         TP_ARGS(which, pid, now),
 341
 342         TP_STRUCT__entry(
 343                 __field( int ,                  which   )
 344                 __field( pid_t,                 pid     )
 345                 __field( unsigned long long,    now     )
 346         ),
 347
 348         TP_fast_assign(
 349                 __entry->which  = which;
 350                 __entry->now    = now;
 351                 __entry->pid    = pid_nr(pid);
 352         ),
 353
 354         TP_printk("which=%d pid=%d now=%llu", __entry->which,
 355                   (int) __entry->pid, __entry->now)
 356 );
 357
 358 #ifdef CONFIG_NO_HZ_COMMON
 359
 360 #define TICK_DEP_NAMES                                  \
 361                 tick_dep_mask_name(NONE)                \
 362                 tick_dep_name(POSIX_TIMER)              \
 363                 tick_dep_name(PERF_EVENTS)              \
 364                 tick_dep_name(SCHED)                    \
 365                 tick_dep_name_end(CLOCK_UNSTABLE)
 366
 367 #undef tick_dep_name
 368 #undef tick_dep_mask_name
 369 #undef tick_dep_name_end
 370
 371 /* The MASK will convert to their bits and they need to be processed too */
 372 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 373         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 374 #define tick_dep_name_end(sdep)  TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \
 375         TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 376 /* NONE only has a mask defined for it */
 377 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
 378
 379 TICK_DEP_NAMES
 380
 381 #undef tick_dep_name
 382 #undef tick_dep_mask_name
 383 #undef tick_dep_name_end
 384
 385 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 386 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
 387 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep }
 388
 389 #define show_tick_dep_name(val)                         \
 390         __print_symbolic(val, TICK_DEP_NAMES)
 391
 392 TRACE_EVENT(tick_stop,
 393
 394         TP_PROTO(int success, int dependency),
 395
 396         TP_ARGS(success, dependency),
 397
 398         TP_STRUCT__entry(
 399                 __field( int ,          success )
 400                 __field( int ,          dependency )
 401         ),
 402
 403         TP_fast_assign(
 404                 __entry->success        = success;
 405                 __entry->dependency     = dependency;
 406         ),
 407
 408         TP_printk("success=%d dependency=%s",  __entry->success, \
 409                         show_tick_dep_name(__entry->dependency))
 410 );
 411 #endif
 412
 413 #endif /*  _TRACE_TIMER_H */
 414
 415 /* This part must be outside protection */
 416 #include <trace/define_trace.h>