instrumentation/events/lttng-module/rcu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM rcu
   4
   5 #if !defined(LTTNG_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define LTTNG_TRACE_RCU_H
   7
   8 #include <probes/lttng-tracepoint-event.h>
   9 #include <linux/version.h>
  10
  11 /*
  12  * Tracepoint for start/end markers used for utilization calculations.
  13  * By convention, the string is of the following forms:
  14  *
  15  * "Start <activity>" -- Mark the start of the specified activity,
  16  *                       such as "context switch".  Nesting is permitted.
  17  * "End <activity>" -- Mark the end of the specified activity.
  18  *
  19  * An "@" character within "<activity>" is a comment character: Data
  20  * reduction scripts will ignore the "@" and the remainder of the line.
  21  */
  22 LTTNG_TRACEPOINT_EVENT(rcu_utilization,
  23
  24 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
  25         TP_PROTO(const char *s),
  26 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
  27         TP_PROTO(char *s),
  28 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
  29
  30         TP_ARGS(s),
  31
  32         TP_FIELDS(
  33                 ctf_string(s, s)
  34         )
  35 )
  36
  37 #ifdef CONFIG_RCU_TRACE
  38
  39 #if defined(CONFIG_TREE_RCU) \
  40         || (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) \
  41                 && defined(CONFIG_PREEMPT_RCU)) \
  42         || defined(CONFIG_TREE_PREEMPT_RCU)
  43
  44 /*
  45  * Tracepoint for grace-period events: starting and ending a grace
  46  * period ("start" and "end", respectively), a CPU noting the start
  47  * of a new grace period or the end of an old grace period ("cpustart"
  48  * and "cpuend", respectively), a CPU passing through a quiescent
  49  * state ("cpuqs"), a CPU coming online or going offline ("cpuonl"
  50  * and "cpuofl", respectively), and a CPU being kicked for being too
  51  * long in dyntick-idle mode ("kick").
  52  */
  53 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
  54 LTTNG_TRACEPOINT_EVENT(rcu_grace_period,
  55
  56         TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent),
  57
  58         TP_ARGS(rcuname, gp_seq, gpevent),
  59
  60         TP_FIELDS(
  61                 ctf_string(rcuname, rcuname)
  62                 ctf_integer(unsigned long, gp_seq, gp_seq)
  63                 ctf_string(gpevent, gpevent)
  64         )
  65 )
  66 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
  67 LTTNG_TRACEPOINT_EVENT(rcu_grace_period,
  68
  69         TP_PROTO(const char *rcuname, unsigned long gpnum, const char *gpevent),
  70
  71         TP_ARGS(rcuname, gpnum, gpevent),
  72
  73         TP_FIELDS(
  74                 ctf_string(rcuname, rcuname)
  75                 ctf_integer(unsigned long, gpnum, gpnum)
  76                 ctf_string(gpevent, gpevent)
  77         )
  78 )
  79 #else
  80 LTTNG_TRACEPOINT_EVENT(rcu_grace_period,
  81
  82         TP_PROTO(char *rcuname, unsigned long gpnum, char *gpevent),
  83
  84         TP_ARGS(rcuname, gpnum, gpevent),
  85
  86         TP_FIELDS(
  87                 ctf_string(rcuname, rcuname)
  88                 ctf_integer(unsigned long, gpnum, gpnum)
  89                 ctf_string(gpevent, gpevent)
  90         )
  91 )
  92 #endif
  93
  94 /*
  95  * Tracepoint for grace-period-initialization events.  These are
  96  * distinguished by the type of RCU, the new grace-period number, the
  97  * rcu_node structure level, the starting and ending CPU covered by the
  98  * rcu_node structure, and the mask of CPUs that will be waited for.
  99  * All but the type of RCU are extracted from the rcu_node structure.
 100  */
 101 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 102 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init,
 103
 104         TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level,
 105                  int grplo, int grphi, unsigned long qsmask),
 106
 107         TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask),
 108
 109         TP_FIELDS(
 110                 ctf_string(rcuname, rcuname)
 111                 ctf_integer(unsigned long, gp_seq, gp_seq)
 112                 ctf_integer(u8, level, level)
 113                 ctf_integer(int, grplo, grplo)
 114                 ctf_integer(int, grphi, grphi)
 115                 ctf_integer(unsigned long, qsmask, qsmask)
 116         )
 117 )
 118 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 119 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init,
 120
 121         TP_PROTO(const char *rcuname, unsigned long gpnum, u8 level,
 122                  int grplo, int grphi, unsigned long qsmask),
 123
 124         TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask),
 125
 126         TP_FIELDS(
 127                 ctf_string(rcuname, rcuname)
 128                 ctf_integer(unsigned long, gpnum, gpnum)
 129                 ctf_integer(u8, level, level)
 130                 ctf_integer(int, grplo, grplo)
 131                 ctf_integer(int, grphi, grphi)
 132                 ctf_integer(unsigned long, qsmask, qsmask)
 133         )
 134 )
 135 #else
 136 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init,
 137
 138         TP_PROTO(char *rcuname, unsigned long gpnum, u8 level,
 139                  int grplo, int grphi, unsigned long qsmask),
 140
 141         TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask),
 142
 143         TP_FIELDS(
 144                 ctf_string(rcuname, rcuname)
 145                 ctf_integer(unsigned long, gpnum, gpnum)
 146                 ctf_integer(u8, level, level)
 147                 ctf_integer(int, grplo, grplo)
 148                 ctf_integer(int, grphi, grphi)
 149                 ctf_integer(unsigned long, qsmask, qsmask)
 150         )
 151 )
 152 #endif
 153
 154 /*
 155  * Tracepoint for tasks blocking within preemptible-RCU read-side
 156  * critical sections.  Track the type of RCU (which one day might
 157  * include SRCU), the grace-period number that the task is blocking
 158  * (the current or the next), and the task's PID.
 159  */
 160 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 161 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task,
 162
 163         TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq),
 164
 165         TP_ARGS(rcuname, pid, gp_seq),
 166
 167         TP_FIELDS(
 168                 ctf_string(rcuname, rcuname)
 169                 ctf_integer(unsigned long, gp_seq, gp_seq)
 170                 ctf_integer(int, pid, pid)
 171         )
 172 )
 173 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 174 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task,
 175
 176         TP_PROTO(const char *rcuname, int pid, unsigned long gpnum),
 177
 178         TP_ARGS(rcuname, pid, gpnum),
 179
 180         TP_FIELDS(
 181                 ctf_string(rcuname, rcuname)
 182                 ctf_integer(unsigned long, gpnum, gpnum)
 183                 ctf_integer(int, pid, pid)
 184         )
 185 )
 186 #else
 187 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task,
 188
 189         TP_PROTO(char *rcuname, int pid, unsigned long gpnum),
 190
 191         TP_ARGS(rcuname, pid, gpnum),
 192
 193         TP_FIELDS(
 194                 ctf_string(rcuname, rcuname)
 195                 ctf_integer(unsigned long, gpnum, gpnum)
 196                 ctf_integer(int, pid, pid)
 197         )
 198 )
 199 #endif
 200
 201 /*
 202  * Tracepoint for tasks that blocked within a given preemptible-RCU
 203  * read-side critical section exiting that critical section.  Track the
 204  * type of RCU (which one day might include SRCU) and the task's PID.
 205  */
 206 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 207 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task,
 208
 209         TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid),
 210
 211         TP_ARGS(rcuname, gp_seq, pid),
 212
 213         TP_FIELDS(
 214                 ctf_string(rcuname, rcuname)
 215                 ctf_integer(unsigned long, gp_seq, gp_seq)
 216                 ctf_integer(int, pid, pid)
 217         )
 218 )
 219 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 220 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task,
 221
 222         TP_PROTO(const char *rcuname, unsigned long gpnum, int pid),
 223
 224         TP_ARGS(rcuname, gpnum, pid),
 225
 226         TP_FIELDS(
 227                 ctf_string(rcuname, rcuname)
 228                 ctf_integer(unsigned long, gpnum, gpnum)
 229                 ctf_integer(int, pid, pid)
 230         )
 231 )
 232 #else
 233 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task,
 234
 235         TP_PROTO(char *rcuname, unsigned long gpnum, int pid),
 236
 237         TP_ARGS(rcuname, gpnum, pid),
 238
 239         TP_FIELDS(
 240                 ctf_string(rcuname, rcuname)
 241                 ctf_integer(unsigned long, gpnum, gpnum)
 242                 ctf_integer(int, pid, pid)
 243         )
 244 )
 245 #endif
 246
 247 /*
 248  * Tracepoint for quiescent-state-reporting events.  These are
 249  * distinguished by the type of RCU, the grace-period number, the
 250  * mask of quiescent lower-level entities, the rcu_node structure level,
 251  * the starting and ending CPU covered by the rcu_node structure, and
 252  * whether there are any blocked tasks blocking the current grace period.
 253  * All but the type of RCU are extracted from the rcu_node structure.
 254  */
 255 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 256 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report,
 257
 258         TP_PROTO(const char *rcuname, unsigned long gp_seq,
 259                  unsigned long mask, unsigned long qsmask,
 260                  u8 level, int grplo, int grphi, int gp_tasks),
 261
 262         TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks),
 263
 264         TP_FIELDS(
 265                 ctf_string(rcuname, rcuname)
 266                 ctf_integer(unsigned long, gp_seq, gp_seq)
 267                 ctf_integer(unsigned long, mask, mask)
 268                 ctf_integer(unsigned long, qsmask, qsmask)
 269                 ctf_integer(u8, level, level)
 270                 ctf_integer(int, grplo, grplo)
 271                 ctf_integer(int, grphi, grphi)
 272                 ctf_integer(u8, gp_tasks, gp_tasks)
 273         )
 274 )
 275 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 276 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report,
 277
 278         TP_PROTO(const char *rcuname, unsigned long gpnum,
 279                  unsigned long mask, unsigned long qsmask,
 280                  u8 level, int grplo, int grphi, int gp_tasks),
 281
 282         TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks),
 283
 284         TP_FIELDS(
 285                 ctf_string(rcuname, rcuname)
 286                 ctf_integer(unsigned long, gpnum, gpnum)
 287                 ctf_integer(unsigned long, mask, mask)
 288                 ctf_integer(unsigned long, qsmask, qsmask)
 289                 ctf_integer(u8, level, level)
 290                 ctf_integer(int, grplo, grplo)
 291                 ctf_integer(int, grphi, grphi)
 292                 ctf_integer(u8, gp_tasks, gp_tasks)
 293         )
 294 )
 295 #else
 296 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report,
 297
 298         TP_PROTO(char *rcuname, unsigned long gpnum,
 299                  unsigned long mask, unsigned long qsmask,
 300                  u8 level, int grplo, int grphi, int gp_tasks),
 301
 302         TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks),
 303
 304         TP_FIELDS(
 305                 ctf_string(rcuname, rcuname)
 306                 ctf_integer(unsigned long, gpnum, gpnum)
 307                 ctf_integer(unsigned long, mask, mask)
 308                 ctf_integer(unsigned long, qsmask, qsmask)
 309                 ctf_integer(u8, level, level)
 310                 ctf_integer(int, grplo, grplo)
 311                 ctf_integer(int, grphi, grphi)
 312                 ctf_integer(u8, gp_tasks, gp_tasks)
 313         )
 314 )
 315 #endif
 316
 317 /*
 318  * Tracepoint for quiescent states detected by force_quiescent_state().
 319  * These trace events include the type of RCU, the grace-period number
 320  * that was blocked by the CPU, the CPU itself, and the type of quiescent
 321  * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
 322  * or "kick" when kicking a CPU that has been in dyntick-idle mode for
 323  * too long.
 324  */
 325 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 326 LTTNG_TRACEPOINT_EVENT(rcu_fqs,
 327
 328         TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent),
 329
 330         TP_ARGS(rcuname, gp_seq, cpu, qsevent),
 331
 332         TP_FIELDS(
 333                 ctf_integer(unsigned long, gp_seq, gp_seq)
 334                 ctf_integer(int, cpu, cpu)
 335                 ctf_string(rcuname, rcuname)
 336                 ctf_string(qsevent, qsevent)
 337         )
 338 )
 339 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 340 LTTNG_TRACEPOINT_EVENT(rcu_fqs,
 341
 342         TP_PROTO(const char *rcuname, unsigned long gpnum, int cpu, const char *qsevent),
 343
 344         TP_ARGS(rcuname, gpnum, cpu, qsevent),
 345
 346         TP_FIELDS(
 347                 ctf_integer(unsigned long, gpnum, gpnum)
 348                 ctf_integer(int, cpu, cpu)
 349                 ctf_string(rcuname, rcuname)
 350                 ctf_string(qsevent, qsevent)
 351         )
 352 )
 353 #else
 354 LTTNG_TRACEPOINT_EVENT(rcu_fqs,
 355
 356         TP_PROTO(char *rcuname, unsigned long gpnum, int cpu, char *qsevent),
 357
 358         TP_ARGS(rcuname, gpnum, cpu, qsevent),
 359
 360         TP_FIELDS(
 361                 ctf_integer(unsigned long, gpnum, gpnum)
 362                 ctf_integer(int, cpu, cpu)
 363                 ctf_string(rcuname, rcuname)
 364                 ctf_string(qsevent, qsevent)
 365         )
 366 )
 367 #endif
 368
 369 #endif  /*
 370          * #if defined(CONFIG_TREE_RCU)
 371          *      || (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0)
 372          *              && defined(CONFIG_PREEMPT_RCU))
 373          *      || defined(CONFIG_TREE_PREEMPT_RCU)
 374          */
 375
 376 /*
 377  * Tracepoint for dyntick-idle entry/exit events.  These take a string
 378  * as argument: "Start" for entering dyntick-idle mode, "End" for
 379  * leaving it, "--=" for events moving towards idle, and "++=" for events
 380  * moving away from idle.  "Error on entry: not idle task" and "Error on
 381  * exit: not idle task" indicate that a non-idle task is erroneously
 382  * toying with the idle loop.
 383  *
 384  * These events also take a pair of numbers, which indicate the nesting
 385  * depth before and after the event of interest.  Note that task-related
 386  * events use the upper bits of each number, while interrupt-related
 387  * events use the lower bits.
 388  */
 389 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))       \
 390         || LTTNG_KERNEL_RANGE(5,5,6, 5,6,0)             \
 391         || LTTNG_KERNEL_RANGE(5,4,22, 5,5,0)
 392 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 393
 394         TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
 395
 396         TP_ARGS(polarity, oldnesting, newnesting, dynticks),
 397
 398         TP_FIELDS(
 399                 ctf_string(polarity, polarity)
 400                 ctf_integer(long, oldnesting, oldnesting)
 401                 ctf_integer(long, newnesting, newnesting)
 402                 ctf_integer(int, dynticks, dynticks)
 403         )
 404 )
 405
 406 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
 407 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 408
 409         TP_PROTO(const char *polarity, long oldnesting, long newnesting, atomic_t dynticks),
 410
 411         TP_ARGS(polarity, oldnesting, newnesting, dynticks),
 412
 413         TP_FIELDS(
 414                 ctf_string(polarity, polarity)
 415                 ctf_integer(long, oldnesting, oldnesting)
 416                 ctf_integer(long, newnesting, newnesting)
 417                 ctf_integer(int, dynticks, atomic_read(&dynticks))
 418         )
 419 )
 420
 421 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 422 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 423
 424         TP_PROTO(const char *polarity, long long oldnesting, long long newnesting),
 425
 426         TP_ARGS(polarity, oldnesting, newnesting),
 427
 428         TP_FIELDS(
 429                 ctf_string(polarity, polarity)
 430                 ctf_integer(long long, oldnesting, oldnesting)
 431                 ctf_integer(long long, newnesting, newnesting)
 432         )
 433 )
 434 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 435 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 436
 437         TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
 438
 439         TP_ARGS(polarity, oldnesting, newnesting),
 440
 441         TP_FIELDS(
 442                 ctf_string(polarity, polarity)
 443                 ctf_integer(long long, oldnesting, oldnesting)
 444                 ctf_integer(long long, newnesting, newnesting)
 445         )
 446 )
 447 #else
 448 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 449
 450         TP_PROTO(char *polarity),
 451
 452         TP_ARGS(polarity),
 453
 454         TP_FIELDS(
 455                 ctf_string(polarity, polarity)
 456         )
 457 )
 458 #endif
 459
 460
 461 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 462 /*
 463  * Tracepoint for RCU preparation for idle, the goal being to get RCU
 464  * processing done so that the current CPU can shut off its scheduling
 465  * clock and enter dyntick-idle mode.  One way to accomplish this is
 466  * to drain all RCU callbacks from this CPU, and the other is to have
 467  * done everything RCU requires for the current grace period.  In this
 468  * latter case, the CPU will be awakened at the end of the current grace
 469  * period in order to process the remainder of its callbacks.
 470  *
 471  * These tracepoints take a string as argument:
 472  *
 473  *      "No callbacks": Nothing to do, no callbacks on this CPU.
 474  *      "In holdoff": Nothing to do, holding off after unsuccessful attempt.
 475  *      "Begin holdoff": Attempt failed, don't retry until next jiffy.
 476  *      "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
 477  *      "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
 478  *      "More callbacks": Still more callbacks, try again to clear them out.
 479  *      "Callbacks drained": All callbacks processed, off to dyntick idle!
 480  *      "Timer": Timer fired to cause CPU to continue processing callbacks.
 481  *      "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
 482  *      "Cleanup after idle": Idle exited, timer canceled.
 483  */
 484 LTTNG_TRACEPOINT_EVENT(rcu_prep_idle,
 485
 486 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 487         TP_PROTO(const char *reason),
 488 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 489         TP_PROTO(char *reason),
 490 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 491
 492         TP_ARGS(reason),
 493
 494         TP_FIELDS(
 495                 ctf_string(reason, reason)
 496         )
 497 )
 498 #endif
 499
 500 /*
 501  * Tracepoint for the registration of a single RCU callback function.
 502  * The first argument is the type of RCU, the second argument is
 503  * a pointer to the RCU callback itself, the third element is the
 504  * number of lazy callbacks queued, and the fourth element is the
 505  * total number of callbacks queued.
 506  */
 507 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
 508 LTTNG_TRACEPOINT_EVENT(rcu_callback,
 509
 510         TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen),
 511
 512         TP_ARGS(rcuname, rhp, qlen),
 513
 514         TP_FIELDS(
 515                 ctf_string(rcuname, rcuname)
 516                 ctf_integer_hex(void *, rhp, rhp)
 517                 ctf_integer_hex(void *, func, rhp->func)
 518                 ctf_integer(long, qlen, qlen)
 519         )
 520 )
 521 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 522 LTTNG_TRACEPOINT_EVENT(rcu_callback,
 523
 524         TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen_lazy,
 525                  long qlen),
 526
 527         TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
 528
 529         TP_FIELDS(
 530                 ctf_string(rcuname, rcuname)
 531                 ctf_integer_hex(void *, rhp, rhp)
 532                 ctf_integer_hex(void *, func, rhp->func)
 533                 ctf_integer(long, qlen_lazy, qlen_lazy)
 534                 ctf_integer(long, qlen, qlen)
 535         )
 536 )
 537 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 538 LTTNG_TRACEPOINT_EVENT(rcu_callback,
 539
 540         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen_lazy,
 541                  long qlen),
 542
 543         TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
 544
 545         TP_FIELDS(
 546                 ctf_string(rcuname, rcuname)
 547                 ctf_integer_hex(void *, rhp, rhp)
 548                 ctf_integer_hex(void *, func, rhp->func)
 549                 ctf_integer(long, qlen_lazy, qlen_lazy)
 550                 ctf_integer(long, qlen, qlen)
 551         )
 552 )
 553 #else
 554 LTTNG_TRACEPOINT_EVENT(rcu_callback,
 555
 556         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen),
 557
 558         TP_ARGS(rcuname, rhp, qlen),
 559
 560         TP_FIELDS(
 561                 ctf_string(rcuname, rcuname)
 562                 ctf_integer_hex(void *, rhp, rhp)
 563                 ctf_integer_hex(void *, func, rhp->func)
 564                 ctf_integer(long, qlen, qlen)
 565         )
 566 )
 567 #endif
 568
 569
 570 /*
 571  * Tracepoint for the registration of a single RCU callback of the special
 572  * kfree() form.  The first argument is the RCU type, the second argument
 573  * is a pointer to the RCU callback, the third argument is the offset
 574  * of the callback within the enclosing RCU-protected data structure,
 575  * the fourth argument is the number of lazy callbacks queued, and the
 576  * fifth argument is the total number of callbacks queued.
 577  */
 578 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
 579 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback,
 580
 581         TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
 582                  long qlen),
 583
 584         TP_ARGS(rcuname, rhp, offset, qlen),
 585
 586         TP_FIELDS(
 587                 ctf_string(rcuname, rcuname)
 588                 ctf_integer_hex(void *, rhp, rhp)
 589                 ctf_integer_hex(unsigned long, offset, offset)
 590                 ctf_integer(long, qlen, qlen)
 591         )
 592 )
 593 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 594 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback,
 595
 596         TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
 597                  long qlen_lazy, long qlen),
 598
 599         TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
 600
 601         TP_FIELDS(
 602                 ctf_string(rcuname, rcuname)
 603                 ctf_integer_hex(void *, rhp, rhp)
 604                 ctf_integer_hex(unsigned long, offset, offset)
 605                 ctf_integer(long, qlen_lazy, qlen_lazy)
 606                 ctf_integer(long, qlen, qlen)
 607         )
 608 )
 609 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 610 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback,
 611
 612         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 613                  long qlen_lazy, long qlen),
 614
 615         TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
 616
 617         TP_FIELDS(
 618                 ctf_string(rcuname, rcuname)
 619                 ctf_integer_hex(void *, rhp, rhp)
 620                 ctf_integer_hex(unsigned long, offset, offset)
 621                 ctf_integer(long, qlen_lazy, qlen_lazy)
 622                 ctf_integer(long, qlen, qlen)
 623         )
 624 )
 625 #else
 626 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback,
 627
 628         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 629                  long qlen),
 630
 631         TP_ARGS(rcuname, rhp, offset, qlen),
 632
 633         TP_FIELDS(
 634                 ctf_string(rcuname, rcuname)
 635                 ctf_integer_hex(void *, rhp, rhp)
 636                 ctf_integer_hex(unsigned long, offset, offset)
 637                 ctf_integer(long, qlen, qlen)
 638         )
 639 )
 640 #endif
 641
 642 /*
 643  * Tracepoint for marking the beginning rcu_do_batch, performed to start
 644  * RCU callback invocation.  The first argument is the RCU flavor,
 645  * the second is the number of lazy callbacks queued, the third is
 646  * the total number of callbacks queued, and the fourth argument is
 647  * the current RCU-callback batch limit.
 648  */
 649 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
 650 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 651
 652         TP_PROTO(const char *rcuname, long qlen, long blimit),
 653
 654         TP_ARGS(rcuname, qlen, blimit),
 655
 656         TP_FIELDS(
 657                 ctf_string(rcuname, rcuname)
 658                 ctf_integer(long, qlen, qlen)
 659                 ctf_integer(long, blimit, blimit)
 660         )
 661 )
 662 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 663 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 664
 665         TP_PROTO(const char *rcuname, long qlen_lazy, long qlen, long blimit),
 666
 667         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 668
 669         TP_FIELDS(
 670                 ctf_string(rcuname, rcuname)
 671                 ctf_integer(long, qlen_lazy, qlen_lazy)
 672                 ctf_integer(long, qlen, qlen)
 673                 ctf_integer(long, blimit, blimit)
 674         )
 675 )
 676 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 677 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 678
 679         TP_PROTO(char *rcuname, long qlen_lazy, long qlen, long blimit),
 680
 681         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 682
 683         TP_FIELDS(
 684                 ctf_string(rcuname, rcuname)
 685                 ctf_integer(long, qlen_lazy, qlen_lazy)
 686                 ctf_integer(long, qlen, qlen)
 687                 ctf_integer(long, blimit, blimit)
 688         )
 689 )
 690 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 691 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 692
 693         TP_PROTO(char *rcuname, long qlen_lazy, long qlen, int blimit),
 694
 695         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 696
 697         TP_FIELDS(
 698                 ctf_string(rcuname, rcuname)
 699                 ctf_integer(long, qlen_lazy, qlen_lazy)
 700                 ctf_integer(long, qlen, qlen)
 701                 ctf_integer(int, blimit, blimit)
 702         )
 703 )
 704 #else
 705 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 706
 707         TP_PROTO(char *rcuname, long qlen, int blimit),
 708
 709         TP_ARGS(rcuname, qlen, blimit),
 710
 711         TP_FIELDS(
 712                 ctf_string(rcuname, rcuname)
 713                 ctf_integer(long, qlen, qlen)
 714                 ctf_integer(int, blimit, blimit)
 715         )
 716 )
 717 #endif
 718
 719 /*
 720  * Tracepoint for the invocation of a single RCU callback function.
 721  * The first argument is the type of RCU, and the second argument is
 722  * a pointer to the RCU callback itself.
 723  */
 724 LTTNG_TRACEPOINT_EVENT(rcu_invoke_callback,
 725
 726 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 727         TP_PROTO(const char *rcuname, struct rcu_head *rhp),
 728 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 729         TP_PROTO(char *rcuname, struct rcu_head *rhp),
 730 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 731
 732         TP_ARGS(rcuname, rhp),
 733
 734         TP_FIELDS(
 735                 ctf_string(rcuname, rcuname)
 736                 ctf_integer_hex(void *, rhp, rhp)
 737                 ctf_integer_hex(void *, func, rhp->func)
 738         )
 739 )
 740
 741 /*
 742  * Tracepoint for the invocation of a single RCU callback of the special
 743  * kfree() form.  The first argument is the RCU flavor, the second
 744  * argument is a pointer to the RCU callback, and the third argument
 745  * is the offset of the callback within the enclosing RCU-protected
 746  * data structure.
 747  */
 748 LTTNG_TRACEPOINT_EVENT(rcu_invoke_kfree_callback,
 749
 750 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 751         TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
 752 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 753         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset),
 754 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 755
 756         TP_ARGS(rcuname, rhp, offset),
 757
 758         TP_FIELDS(
 759                 ctf_string(rcuname, rcuname)
 760                 ctf_integer_hex(void *, rhp, rhp)
 761                 ctf_integer(unsigned long, offset, offset)
 762         )
 763 )
 764
 765 /*
 766  * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
 767  * invoked.  The first argument is the name of the RCU flavor,
 768  * the second argument is number of callbacks actually invoked,
 769  * the third argument (cb) is whether or not any of the callbacks that
 770  * were ready to invoke at the beginning of this batch are still
 771  * queued, the fourth argument (nr) is the return value of need_resched(),
 772  * the fifth argument (iit) is 1 if the current task is the idle task,
 773  * and the sixth argument (risk) is the return value from
 774  * rcu_is_callbacks_kthread().
 775  */
 776 LTTNG_TRACEPOINT_EVENT(rcu_batch_end,
 777
 778 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
 779         TP_PROTO(const char *rcuname, int callbacks_invoked,
 780                  char cb, char nr, char iit, char risk),
 781
 782         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 783 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 784         TP_PROTO(const char *rcuname, int callbacks_invoked,
 785                  bool cb, bool nr, bool iit, bool risk),
 786
 787         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 788 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 789         TP_PROTO(char *rcuname, int callbacks_invoked,
 790                  bool cb, bool nr, bool iit, bool risk),
 791
 792         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 793 #else
 794         TP_PROTO(char *rcuname, int callbacks_invoked),
 795
 796         TP_ARGS(rcuname, callbacks_invoked),
 797 #endif
 798
 799         TP_FIELDS(
 800                 ctf_string(rcuname, rcuname)
 801                 ctf_integer(int, callbacks_invoked, callbacks_invoked)
 802 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
 803                 ctf_integer(char, cb, cb)
 804                 ctf_integer(char, nr, nr)
 805                 ctf_integer(char, iit, iit)
 806                 ctf_integer(char, risk, risk)
 807 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 808                 ctf_integer(bool, cb, cb)
 809                 ctf_integer(bool, nr, nr)
 810                 ctf_integer(bool, iit, iit)
 811                 ctf_integer(bool, risk, risk)
 812 #endif
 813         )
 814 )
 815
 816 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 817 /*
 818  * Tracepoint for rcutorture readers.  The first argument is the name
 819  * of the RCU flavor from rcutorture's viewpoint and the second argument
 820  * is the callback address.
 821  */
 822 LTTNG_TRACEPOINT_EVENT(rcu_torture_read,
 823
 824 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 825         TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
 826                  unsigned long secs, unsigned long c_old, unsigned long c),
 827
 828         TP_ARGS(rcutorturename, rhp, secs, c_old, c),
 829 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 830         TP_PROTO(char *rcutorturename, struct rcu_head *rhp,
 831                  unsigned long secs, unsigned long c_old, unsigned long c),
 832
 833         TP_ARGS(rcutorturename, rhp, secs, c_old, c),
 834 #else
 835         TP_PROTO(char *rcutorturename, struct rcu_head *rhp),
 836
 837         TP_ARGS(rcutorturename, rhp),
 838 #endif
 839
 840         TP_FIELDS(
 841                 ctf_string(rcutorturename, rcutorturename)
 842                 ctf_integer_hex(struct rcu_head *, rhp, rhp)
 843 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 844                 ctf_integer(unsigned long, secs, secs)
 845                 ctf_integer(unsigned long, c_old, c_old)
 846                 ctf_integer(unsigned long, c, c)
 847 #endif
 848         )
 849 )
 850 #endif
 851
 852 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 853 /*
 854  * Tracepoint for _rcu_barrier() execution.  The string "s" describes
 855  * the _rcu_barrier phase:
 856  *      "Begin": rcu_barrier_callback() started.
 857  *      "Check": rcu_barrier_callback() checking for piggybacking.
 858  *      "EarlyExit": rcu_barrier_callback() piggybacked, thus early exit.
 859  *      "Inc1": rcu_barrier_callback() piggyback check counter incremented.
 860  *      "Offline": rcu_barrier_callback() found offline CPU
 861  *      "OnlineQ": rcu_barrier_callback() found online CPU with callbacks.
 862  *      "OnlineNQ": rcu_barrier_callback() found online CPU, no callbacks.
 863  *      "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
 864  *      "CB": An rcu_barrier_callback() invoked a callback, not the last.
 865  *      "LastCB": An rcu_barrier_callback() invoked the last callback.
 866  *      "Inc2": rcu_barrier_callback() piggyback check counter incremented.
 867  * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
 868  * is the count of remaining callbacks, and "done" is the piggybacking count.
 869  */
 870 LTTNG_TRACEPOINT_EVENT(rcu_barrier,
 871
 872 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 873         TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
 874 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 875         TP_PROTO(char *rcuname, char *s, int cpu, int cnt, unsigned long done),
 876 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 877
 878         TP_ARGS(rcuname, s, cpu, cnt, done),
 879
 880         TP_FIELDS(
 881                 ctf_string(rcuname, rcuname)
 882                 ctf_string(s, s)
 883                 ctf_integer(int, cpu, cpu)
 884                 ctf_integer(int, cnt, cnt)
 885                 ctf_integer(unsigned long, done, done)
 886         )
 887 )
 888 #endif
 889
 890 #else /* #ifdef CONFIG_RCU_TRACE */
 891
 892 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 893 #define trace_rcu_grace_period(rcuname, gp_seq, gpevent) do { } while (0)
 894 #define trace_rcu_grace_period_init(rcuname, gp_seq, level, grplo, grphi, \
 895                                     qsmask) do { } while (0)
 896 #define trace_rcu_preempt_task(rcuname, pid, gp_seq) do { } while (0)
 897 #define trace_rcu_unlock_preempted_task(rcuname, gp_seq, pid) do { } while (0)
 898 #define trace_rcu_quiescent_state_report(rcuname, gp_seq, mask, qsmask, level, \
 899                                          grplo, grphi, gp_tasks) do { } \
 900         while (0)
 901 #define trace_rcu_fqs(rcuname, gp_seq, cpu, qsevent) do { } while (0)
 902 #else
 903 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
 904 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
 905                                     qsmask) do { } while (0)
 906 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
 907 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
 908 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
 909                                          grplo, grphi, gp_tasks) do { } \
 910         while (0)
 911 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
 912 #endif
 913
 914 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
 915 #define trace_rcu_dyntick(polarity, oldnesting, newnesting, dyntick) do { } while (0)
 916 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 917 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
 918 #else
 919 #define trace_rcu_dyntick(polarity) do { } while (0)
 920 #endif
 921 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 922 #define trace_rcu_prep_idle(reason) do { } while (0)
 923 #endif
 924 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 925 #define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
 926 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
 927         do { } while (0)
 928 #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
 929         do { } while (0)
 930 #else
 931 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
 932 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
 933 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
 934 #endif
 935 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
 936 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
 937 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 938 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
 939         do { } while (0)
 940 #else
 941 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
 942 #endif
 943 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 944 #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
 945         do { } while (0)
 946 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 947 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
 948 #endif
 949 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 950 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
 951 #endif
 952 #endif /* #else #ifdef CONFIG_RCU_TRACE */
 953
 954 #endif /* LTTNG_TRACE_RCU_H */
 955
 956 /* This part must be outside protection */
 957 #include <probes/define_trace.h>