instrumentation/events/lttng-module/timer.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM timer
   4
   5 #if !defined(LTTNG_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define LTTNG_TRACE_TIMER_H
   7
   8 #include <probes/lttng-tracepoint-event.h>
   9
  10 #ifndef _TRACE_TIMER_DEF_
  11 #define _TRACE_TIMER_DEF_
  12 #include <linux/hrtimer.h>
  13 #include <linux/timer.h>
  14 #include <linux/version.h>
  15
  16 struct timer_list;
  17
  18 #endif /* _TRACE_TIMER_DEF_ */
  19
  20 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
  21 #define lttng_ktime_get_tv64(kt)        (kt)
  22 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
  23 #define lttng_ktime_get_tv64(kt)        ((kt).tv64)
  24 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
  25
  26 LTTNG_TRACEPOINT_EVENT_CLASS(timer_class,
  27
  28         TP_PROTO(struct timer_list *timer),
  29
  30         TP_ARGS(timer),
  31
  32         TP_FIELDS(
  33                 ctf_integer_hex(void *, timer, timer)
  34         )
  35 )
  36
  37 /**
  38  * timer_init - called when the timer is initialized
  39  * @timer:      pointer to struct timer_list
  40  */
  41 LTTNG_TRACEPOINT_EVENT_INSTANCE(timer_class, timer_init,
  42
  43         TP_PROTO(struct timer_list *timer),
  44
  45         TP_ARGS(timer)
  46 )
  47
  48 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0) || \
  49         LTTNG_RHEL_KERNEL_RANGE(3,10,0,957,0,0, 3,11,0,0,0,0))
  50 /**
  51  * timer_start - called when the timer is started
  52  * @timer:      pointer to struct timer_list
  53  * @expires:    the timers expiry time
  54  * @flags:      the timers expiry time
  55  */
  56 LTTNG_TRACEPOINT_EVENT(timer_start,
  57
  58         TP_PROTO(struct timer_list *timer, unsigned long expires,
  59                 unsigned int flags),
  60
  61         TP_ARGS(timer, expires, flags),
  62
  63         TP_FIELDS(
  64                 ctf_integer_hex(void *, timer, timer)
  65                 ctf_integer_hex(void *, function, timer->function)
  66                 ctf_integer(unsigned long, expires, expires)
  67                 ctf_integer(unsigned long, now, jiffies)
  68                 ctf_integer(unsigned int, flags, flags)
  69         )
  70 )
  71 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)) */
  72 /**
  73  * timer_start - called when the timer is started
  74  * @timer:      pointer to struct timer_list
  75  * @expires:    the timers expiry time
  76  */
  77 LTTNG_TRACEPOINT_EVENT(timer_start,
  78
  79         TP_PROTO(struct timer_list *timer, unsigned long expires),
  80
  81         TP_ARGS(timer, expires),
  82
  83         TP_FIELDS(
  84                 ctf_integer_hex(void *, timer, timer)
  85                 ctf_integer_hex(void *, function, timer->function)
  86                 ctf_integer(unsigned long, expires, expires)
  87                 ctf_integer(unsigned long, now, jiffies)
  88         )
  89 )
  90 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)) */
  91
  92 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,2,0))
  93 /**
  94  * timer_expire_entry - called immediately before the timer callback
  95  * @timer:      pointer to struct timer_list
  96  *
  97  * Allows to determine the timer latency.
  98  */
  99 LTTNG_TRACEPOINT_EVENT(timer_expire_entry,
 100
 101         TP_PROTO(struct timer_list *timer, unsigned long baseclk),
 102
 103         TP_ARGS(timer, baseclk),
 104
 105         TP_FIELDS(
 106                 ctf_integer_hex(void *, timer, timer)
 107                 ctf_integer(unsigned long, now, jiffies)
 108                 ctf_integer_hex(void *, function, timer->function)
 109                 ctf_integer(unsigned long, baseclk, baseclk)
 110         )
 111 )
 112 #else
 113 /**
 114  * timer_expire_entry - called immediately before the timer callback
 115  * @timer:      pointer to struct timer_list
 116  *
 117  * Allows to determine the timer latency.
 118  */
 119 LTTNG_TRACEPOINT_EVENT(timer_expire_entry,
 120
 121         TP_PROTO(struct timer_list *timer),
 122
 123         TP_ARGS(timer),
 124
 125         TP_FIELDS(
 126                 ctf_integer_hex(void *, timer, timer)
 127                 ctf_integer(unsigned long, now, jiffies)
 128                 ctf_integer_hex(void *, function, timer->function)
 129         )
 130 )
 131 #endif
 132
 133 /**
 134  * timer_expire_exit - called immediately after the timer callback returns
 135  * @timer:      pointer to struct timer_list
 136  *
 137  * When used in combination with the timer_expire_entry tracepoint we can
 138  * determine the runtime of the timer callback function.
 139  *
 140  * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 141  * be invalid. We solely track the pointer.
 142  */
 143 LTTNG_TRACEPOINT_EVENT_INSTANCE(timer_class, timer_expire_exit,
 144
 145         TP_PROTO(struct timer_list *timer),
 146
 147         TP_ARGS(timer)
 148 )
 149
 150 /**
 151  * timer_cancel - called when the timer is canceled
 152  * @timer:      pointer to struct timer_list
 153  */
 154 LTTNG_TRACEPOINT_EVENT_INSTANCE(timer_class, timer_cancel,
 155
 156         TP_PROTO(struct timer_list *timer),
 157
 158         TP_ARGS(timer)
 159 )
 160
 161 /**
 162  * hrtimer_init - called when the hrtimer is initialized
 163  * @timer:      pointer to struct hrtimer
 164  * @clockid:    the hrtimers clock
 165  * @mode:       the hrtimers mode
 166  */
 167 LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_init,
 168
 169         timer_hrtimer_init,
 170
 171         TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
 172                  enum hrtimer_mode mode),
 173
 174         TP_ARGS(hrtimer, clockid, mode),
 175
 176         TP_FIELDS(
 177                 ctf_integer_hex(void *, hrtimer, hrtimer)
 178                 ctf_integer(clockid_t, clockid, clockid)
 179                 ctf_integer(enum hrtimer_mode, mode, mode)
 180         )
 181 )
 182
 183 /**
 184  * hrtimer_start - called when the hrtimer is started
 185  * @timer: pointer to struct hrtimer
 186  */
 187 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0) || \
 188         LTTNG_RT_KERNEL_RANGE(4,14,0,0, 4,15,0,0))
 189 LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
 190
 191         timer_hrtimer_start,
 192
 193         TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode),
 194
 195         TP_ARGS(hrtimer, mode),
 196
 197         TP_FIELDS(
 198                 ctf_integer_hex(void *, hrtimer, hrtimer)
 199                 ctf_integer_hex(void *, function, hrtimer->function)
 200                 ctf_integer(s64, expires,
 201                         lttng_ktime_get_tv64(hrtimer_get_expires(hrtimer)))
 202                 ctf_integer(s64, softexpires,
 203                         lttng_ktime_get_tv64(hrtimer_get_softexpires(hrtimer)))
 204                 ctf_integer(enum hrtimer_mode, mode, mode)
 205         )
 206 )
 207 #else
 208 LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
 209
 210         timer_hrtimer_start,
 211
 212         TP_PROTO(struct hrtimer *hrtimer),
 213
 214         TP_ARGS(hrtimer),
 215
 216         TP_FIELDS(
 217                 ctf_integer_hex(void *, hrtimer, hrtimer)
 218                 ctf_integer_hex(void *, function, hrtimer->function)
 219                 ctf_integer(s64, expires,
 220                         lttng_ktime_get_tv64(hrtimer_get_expires(hrtimer)))
 221                 ctf_integer(s64, softexpires,
 222                         lttng_ktime_get_tv64(hrtimer_get_softexpires(hrtimer)))
 223         )
 224 )
 225 #endif
 226
 227 /**
 228  * htimmer_expire_entry - called immediately before the hrtimer callback
 229  * @timer:      pointer to struct hrtimer
 230  * @now:        pointer to variable which contains current time of the
 231  *              timers base.
 232  *
 233  * Allows to determine the timer latency.
 234  */
 235 LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_expire_entry,
 236
 237         timer_hrtimer_expire_entry,
 238
 239         TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 240
 241         TP_ARGS(hrtimer, now),
 242
 243         TP_FIELDS(
 244                 ctf_integer_hex(void *, hrtimer, hrtimer)
 245                 ctf_integer(s64, now, lttng_ktime_get_tv64(*now))
 246                 ctf_integer_hex(void *, function, hrtimer->function)
 247         )
 248 )
 249
 250 LTTNG_TRACEPOINT_EVENT_CLASS(timer_hrtimer_class,
 251
 252         TP_PROTO(struct hrtimer *hrtimer),
 253
 254         TP_ARGS(hrtimer),
 255
 256         TP_FIELDS(
 257                 ctf_integer_hex(void *, hrtimer, hrtimer)
 258         )
 259 )
 260
 261 /**
 262  * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 263  * @timer:      pointer to struct hrtimer
 264  *
 265  * When used in combination with the hrtimer_expire_entry tracepoint we can
 266  * determine the runtime of the callback function.
 267  */
 268 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(timer_hrtimer_class, hrtimer_expire_exit,
 269
 270         timer_hrtimer_expire_exit,
 271
 272         TP_PROTO(struct hrtimer *hrtimer),
 273
 274         TP_ARGS(hrtimer)
 275 )
 276
 277 /**
 278  * hrtimer_cancel - called when the hrtimer is canceled
 279  * @hrtimer:    pointer to struct hrtimer
 280  */
 281 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(timer_hrtimer_class, hrtimer_cancel,
 282
 283         timer_hrtimer_cancel,
 284
 285         TP_PROTO(struct hrtimer *hrtimer),
 286
 287         TP_ARGS(hrtimer)
 288 )
 289
 290 /**
 291  * itimer_state - called when itimer is started or canceled
 292  * @which:      name of the interval timer
 293  * @value:      the itimers value, itimer is canceled if value->it_value is
 294  *              zero, otherwise it is started
 295  * @expires:    the itimers expiry time
 296  */
 297 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0))
 298 LTTNG_TRACEPOINT_EVENT_MAP(itimer_state,
 299
 300         timer_itimer_state,
 301
 302         TP_PROTO(int which, const struct itimerspec64 *const value,
 303                  unsigned long long expires),
 304
 305         TP_ARGS(which, value, expires),
 306
 307         TP_FIELDS(
 308                 ctf_integer(int, which, which)
 309                 ctf_integer(unsigned long long, expires, expires)
 310                 ctf_integer(long, value_sec, value->it_value.tv_sec)
 311                 ctf_integer(long, value_nsec, value->it_value.tv_nsec)
 312                 ctf_integer(long, interval_sec, value->it_interval.tv_sec)
 313                 ctf_integer(long, interval_nsec, value->it_interval.tv_nsec)
 314         )
 315 )
 316 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0))
 317 LTTNG_TRACEPOINT_EVENT_MAP(itimer_state,
 318
 319         timer_itimer_state,
 320
 321         TP_PROTO(int which, const struct itimerval *const value,
 322                  unsigned long long expires),
 323
 324         TP_ARGS(which, value, expires),
 325
 326         TP_FIELDS(
 327                 ctf_integer(int, which, which)
 328                 ctf_integer(unsigned long long, expires, expires)
 329                 ctf_integer(long, value_sec, value->it_value.tv_sec)
 330                 ctf_integer(long, value_usec, value->it_value.tv_usec)
 331                 ctf_integer(long, interval_sec, value->it_interval.tv_sec)
 332                 ctf_integer(long, interval_usec, value->it_interval.tv_usec)
 333         )
 334 )
 335 #else /* if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
 336 LTTNG_TRACEPOINT_EVENT_MAP(itimer_state,
 337
 338         timer_itimer_state,
 339
 340         TP_PROTO(int which, const struct itimerval *const value,
 341                  cputime_t expires),
 342
 343         TP_ARGS(which, value, expires),
 344
 345         TP_FIELDS(
 346                 ctf_integer(int, which, which)
 347                 ctf_integer(cputime_t, expires, expires)
 348                 ctf_integer(long, value_sec, value->it_value.tv_sec)
 349                 ctf_integer(long, value_usec, value->it_value.tv_usec)
 350                 ctf_integer(long, interval_sec, value->it_interval.tv_sec)
 351                 ctf_integer(long, interval_usec, value->it_interval.tv_usec)
 352         )
 353 )
 354 #endif /* #else (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
 355
 356 /**
 357  * itimer_expire - called when itimer expires
 358  * @which:      type of the interval timer
 359  * @pid:        pid of the process which owns the timer
 360  * @now:        current time, used to calculate the latency of itimer
 361  */
 362 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0))
 363 LTTNG_TRACEPOINT_EVENT_MAP(itimer_expire,
 364
 365         timer_itimer_expire,
 366
 367         TP_PROTO(int which, struct pid *pid, unsigned long long now),
 368
 369         TP_ARGS(which, pid, now),
 370
 371         TP_FIELDS(
 372                 ctf_integer(int , which, which)
 373                 ctf_integer(pid_t, pid, pid_nr(pid))
 374                 ctf_integer(unsigned long long, now, now)
 375         )
 376 )
 377 #else /* if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
 378 LTTNG_TRACEPOINT_EVENT_MAP(itimer_expire,
 379
 380         timer_itimer_expire,
 381
 382         TP_PROTO(int which, struct pid *pid, cputime_t now),
 383
 384         TP_ARGS(which, pid, now),
 385
 386         TP_FIELDS(
 387                 ctf_integer(int , which, which)
 388                 ctf_integer(pid_t, pid, pid_nr(pid))
 389                 ctf_integer(cputime_t, now, now)
 390         )
 391 )
 392 #endif /* #else (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
 393
 394 #endif /*  LTTNG_TRACE_TIMER_H */
 395
 396 /* This part must be outside protection */
 397 #include <probes/define_trace.h>