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_TRACEPOINT_EVENT(rcu_dyntick,
 391
 392         TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
 393
 394         TP_ARGS(polarity, oldnesting, newnesting, dynticks),
 395
 396         TP_FIELDS(
 397                 ctf_string(polarity, polarity)
 398                 ctf_integer(long, oldnesting, oldnesting)
 399                 ctf_integer(long, newnesting, newnesting)
 400                 ctf_integer(int, dynticks, dynticks)
 401         )
 402 )
 403
 404 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
 405 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 406
 407         TP_PROTO(const char *polarity, long oldnesting, long newnesting, atomic_t dynticks),
 408
 409         TP_ARGS(polarity, oldnesting, newnesting, dynticks),
 410
 411         TP_FIELDS(
 412                 ctf_string(polarity, polarity)
 413                 ctf_integer(long, oldnesting, oldnesting)
 414                 ctf_integer(long, newnesting, newnesting)
 415                 ctf_integer(int, dynticks, atomic_read(&dynticks))
 416         )
 417 )
 418
 419 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 420 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 421
 422         TP_PROTO(const char *polarity, long long oldnesting, long long newnesting),
 423
 424         TP_ARGS(polarity, oldnesting, newnesting),
 425
 426         TP_FIELDS(
 427                 ctf_string(polarity, polarity)
 428                 ctf_integer(long long, oldnesting, oldnesting)
 429                 ctf_integer(long long, newnesting, newnesting)
 430         )
 431 )
 432 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 433 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 434
 435         TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
 436
 437         TP_ARGS(polarity, oldnesting, newnesting),
 438
 439         TP_FIELDS(
 440                 ctf_string(polarity, polarity)
 441                 ctf_integer(long long, oldnesting, oldnesting)
 442                 ctf_integer(long long, newnesting, newnesting)
 443         )
 444 )
 445 #else
 446 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 447
 448         TP_PROTO(char *polarity),
 449
 450         TP_ARGS(polarity),
 451
 452         TP_FIELDS(
 453                 ctf_string(polarity, polarity)
 454         )
 455 )
 456 #endif
 457
 458
 459 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 460 /*
 461  * Tracepoint for RCU preparation for idle, the goal being to get RCU
 462  * processing done so that the current CPU can shut off its scheduling
 463  * clock and enter dyntick-idle mode.  One way to accomplish this is
 464  * to drain all RCU callbacks from this CPU, and the other is to have
 465  * done everything RCU requires for the current grace period.  In this
 466  * latter case, the CPU will be awakened at the end of the current grace
 467  * period in order to process the remainder of its callbacks.
 468  *
 469  * These tracepoints take a string as argument:
 470  *
 471  *      "No callbacks": Nothing to do, no callbacks on this CPU.
 472  *      "In holdoff": Nothing to do, holding off after unsuccessful attempt.
 473  *      "Begin holdoff": Attempt failed, don't retry until next jiffy.
 474  *      "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
 475  *      "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
 476  *      "More callbacks": Still more callbacks, try again to clear them out.
 477  *      "Callbacks drained": All callbacks processed, off to dyntick idle!
 478  *      "Timer": Timer fired to cause CPU to continue processing callbacks.
 479  *      "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
 480  *      "Cleanup after idle": Idle exited, timer canceled.
 481  */
 482 LTTNG_TRACEPOINT_EVENT(rcu_prep_idle,
 483
 484 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 485         TP_PROTO(const char *reason),
 486 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 487         TP_PROTO(char *reason),
 488 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 489
 490         TP_ARGS(reason),
 491
 492         TP_FIELDS(
 493                 ctf_string(reason, reason)
 494         )
 495 )
 496 #endif
 497
 498 /*
 499  * Tracepoint for the registration of a single RCU callback function.
 500  * The first argument is the type of RCU, the second argument is
 501  * a pointer to the RCU callback itself, the third element is the
 502  * number of lazy callbacks queued, and the fourth element is the
 503  * total number of callbacks queued.
 504  */
 505 LTTNG_TRACEPOINT_EVENT(rcu_callback,
 506
 507 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 508         TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen_lazy,
 509                  long qlen),
 510
 511         TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
 512 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 513         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen_lazy,
 514                  long qlen),
 515
 516         TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
 517 #else
 518         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen),
 519
 520         TP_ARGS(rcuname, rhp, qlen),
 521 #endif
 522
 523         TP_FIELDS(
 524                 ctf_string(rcuname, rcuname)
 525                 ctf_integer_hex(void *, rhp, rhp)
 526                 ctf_integer_hex(void *, func, rhp->func)
 527 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 528                 ctf_integer(long, qlen_lazy, qlen_lazy)
 529 #endif
 530                 ctf_integer(long, qlen, qlen)
 531         )
 532 )
 533
 534 /*
 535  * Tracepoint for the registration of a single RCU callback of the special
 536  * kfree() form.  The first argument is the RCU type, the second argument
 537  * is a pointer to the RCU callback, the third argument is the offset
 538  * of the callback within the enclosing RCU-protected data structure,
 539  * the fourth argument is the number of lazy callbacks queued, and the
 540  * fifth argument is the total number of callbacks queued.
 541  */
 542 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback,
 543
 544
 545 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 546         TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
 547                  long qlen_lazy, long qlen),
 548
 549         TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
 550 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 551         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 552                  long qlen_lazy, long qlen),
 553
 554         TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
 555 #else
 556         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 557                  long qlen),
 558
 559         TP_ARGS(rcuname, rhp, offset, qlen),
 560 #endif
 561
 562         TP_FIELDS(
 563                 ctf_string(rcuname, rcuname)
 564                 ctf_integer_hex(void *, rhp, rhp)
 565                 ctf_integer_hex(unsigned long, offset, offset)
 566 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 567                 ctf_integer(long, qlen_lazy, qlen_lazy)
 568 #endif
 569                 ctf_integer(long, qlen, qlen)
 570         )
 571 )
 572
 573 /*
 574  * Tracepoint for marking the beginning rcu_do_batch, performed to start
 575  * RCU callback invocation.  The first argument is the RCU flavor,
 576  * the second is the number of lazy callbacks queued, the third is
 577  * the total number of callbacks queued, and the fourth argument is
 578  * the current RCU-callback batch limit.
 579  */
 580 LTTNG_TRACEPOINT_EVENT(rcu_batch_start,
 581
 582 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 583         TP_PROTO(const char *rcuname, long qlen_lazy, long qlen, long blimit),
 584
 585         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 586 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 587         TP_PROTO(char *rcuname, long qlen_lazy, long qlen, long blimit),
 588
 589         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 590 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 591         TP_PROTO(char *rcuname, long qlen_lazy, long qlen, int blimit),
 592
 593         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 594 #else
 595         TP_PROTO(char *rcuname, long qlen, int blimit),
 596
 597         TP_ARGS(rcuname, qlen, blimit),
 598 #endif
 599
 600         TP_FIELDS(
 601                 ctf_string(rcuname, rcuname)
 602 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 603                 ctf_integer(long, qlen_lazy, qlen_lazy)
 604 #endif
 605                 ctf_integer(long, qlen, qlen)
 606 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 607                 ctf_integer(long, blimit, blimit)
 608 #else
 609                 ctf_integer(int, blimit, blimit)
 610 #endif
 611         )
 612 )
 613
 614 /*
 615  * Tracepoint for the invocation of a single RCU callback function.
 616  * The first argument is the type of RCU, and the second argument is
 617  * a pointer to the RCU callback itself.
 618  */
 619 LTTNG_TRACEPOINT_EVENT(rcu_invoke_callback,
 620
 621 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 622         TP_PROTO(const char *rcuname, struct rcu_head *rhp),
 623 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 624         TP_PROTO(char *rcuname, struct rcu_head *rhp),
 625 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 626
 627         TP_ARGS(rcuname, rhp),
 628
 629         TP_FIELDS(
 630                 ctf_string(rcuname, rcuname)
 631                 ctf_integer_hex(void *, rhp, rhp)
 632                 ctf_integer_hex(void *, func, rhp->func)
 633         )
 634 )
 635
 636 /*
 637  * Tracepoint for the invocation of a single RCU callback of the special
 638  * kfree() form.  The first argument is the RCU flavor, the second
 639  * argument is a pointer to the RCU callback, and the third argument
 640  * is the offset of the callback within the enclosing RCU-protected
 641  * data structure.
 642  */
 643 LTTNG_TRACEPOINT_EVENT(rcu_invoke_kfree_callback,
 644
 645 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 646         TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
 647 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 648         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset),
 649 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 650
 651         TP_ARGS(rcuname, rhp, offset),
 652
 653         TP_FIELDS(
 654                 ctf_string(rcuname, rcuname)
 655                 ctf_integer_hex(void *, rhp, rhp)
 656                 ctf_integer(unsigned long, offset, offset)
 657         )
 658 )
 659
 660 /*
 661  * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
 662  * invoked.  The first argument is the name of the RCU flavor,
 663  * the second argument is number of callbacks actually invoked,
 664  * the third argument (cb) is whether or not any of the callbacks that
 665  * were ready to invoke at the beginning of this batch are still
 666  * queued, the fourth argument (nr) is the return value of need_resched(),
 667  * the fifth argument (iit) is 1 if the current task is the idle task,
 668  * and the sixth argument (risk) is the return value from
 669  * rcu_is_callbacks_kthread().
 670  */
 671 LTTNG_TRACEPOINT_EVENT(rcu_batch_end,
 672
 673 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
 674         TP_PROTO(const char *rcuname, int callbacks_invoked,
 675                  char cb, char nr, char iit, char risk),
 676
 677         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 678 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 679         TP_PROTO(const char *rcuname, int callbacks_invoked,
 680                  bool cb, bool nr, bool iit, bool risk),
 681
 682         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 683 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 684         TP_PROTO(char *rcuname, int callbacks_invoked,
 685                  bool cb, bool nr, bool iit, bool risk),
 686
 687         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 688 #else
 689         TP_PROTO(char *rcuname, int callbacks_invoked),
 690
 691         TP_ARGS(rcuname, callbacks_invoked),
 692 #endif
 693
 694         TP_FIELDS(
 695                 ctf_string(rcuname, rcuname)
 696                 ctf_integer(int, callbacks_invoked, callbacks_invoked)
 697 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
 698                 ctf_integer(char, cb, cb)
 699                 ctf_integer(char, nr, nr)
 700                 ctf_integer(char, iit, iit)
 701                 ctf_integer(char, risk, risk)
 702 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 703                 ctf_integer(bool, cb, cb)
 704                 ctf_integer(bool, nr, nr)
 705                 ctf_integer(bool, iit, iit)
 706                 ctf_integer(bool, risk, risk)
 707 #endif
 708         )
 709 )
 710
 711 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 712 /*
 713  * Tracepoint for rcutorture readers.  The first argument is the name
 714  * of the RCU flavor from rcutorture's viewpoint and the second argument
 715  * is the callback address.
 716  */
 717 LTTNG_TRACEPOINT_EVENT(rcu_torture_read,
 718
 719 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 720         TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
 721                  unsigned long secs, unsigned long c_old, unsigned long c),
 722
 723         TP_ARGS(rcutorturename, rhp, secs, c_old, c),
 724 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 725         TP_PROTO(char *rcutorturename, struct rcu_head *rhp,
 726                  unsigned long secs, unsigned long c_old, unsigned long c),
 727
 728         TP_ARGS(rcutorturename, rhp, secs, c_old, c),
 729 #else
 730         TP_PROTO(char *rcutorturename, struct rcu_head *rhp),
 731
 732         TP_ARGS(rcutorturename, rhp),
 733 #endif
 734
 735         TP_FIELDS(
 736                 ctf_string(rcutorturename, rcutorturename)
 737                 ctf_integer_hex(struct rcu_head *, rhp, rhp)
 738 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 739                 ctf_integer(unsigned long, secs, secs)
 740                 ctf_integer(unsigned long, c_old, c_old)
 741                 ctf_integer(unsigned long, c, c)
 742 #endif
 743         )
 744 )
 745 #endif
 746
 747 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 748 /*
 749  * Tracepoint for _rcu_barrier() execution.  The string "s" describes
 750  * the _rcu_barrier phase:
 751  *      "Begin": rcu_barrier_callback() started.
 752  *      "Check": rcu_barrier_callback() checking for piggybacking.
 753  *      "EarlyExit": rcu_barrier_callback() piggybacked, thus early exit.
 754  *      "Inc1": rcu_barrier_callback() piggyback check counter incremented.
 755  *      "Offline": rcu_barrier_callback() found offline CPU
 756  *      "OnlineQ": rcu_barrier_callback() found online CPU with callbacks.
 757  *      "OnlineNQ": rcu_barrier_callback() found online CPU, no callbacks.
 758  *      "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
 759  *      "CB": An rcu_barrier_callback() invoked a callback, not the last.
 760  *      "LastCB": An rcu_barrier_callback() invoked the last callback.
 761  *      "Inc2": rcu_barrier_callback() piggyback check counter incremented.
 762  * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
 763  * is the count of remaining callbacks, and "done" is the piggybacking count.
 764  */
 765 LTTNG_TRACEPOINT_EVENT(rcu_barrier,
 766
 767 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 768         TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
 769 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 770         TP_PROTO(char *rcuname, char *s, int cpu, int cnt, unsigned long done),
 771 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
 772
 773         TP_ARGS(rcuname, s, cpu, cnt, done),
 774
 775         TP_FIELDS(
 776                 ctf_string(rcuname, rcuname)
 777                 ctf_string(s, s)
 778                 ctf_integer(int, cpu, cpu)
 779                 ctf_integer(int, cnt, cnt)
 780                 ctf_integer(unsigned long, done, done)
 781         )
 782 )
 783 #endif
 784
 785 #else /* #ifdef CONFIG_RCU_TRACE */
 786
 787 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 788 #define trace_rcu_grace_period(rcuname, gp_seq, gpevent) do { } while (0)
 789 #define trace_rcu_grace_period_init(rcuname, gp_seq, level, grplo, grphi, \
 790                                     qsmask) do { } while (0)
 791 #define trace_rcu_preempt_task(rcuname, pid, gp_seq) do { } while (0)
 792 #define trace_rcu_unlock_preempted_task(rcuname, gp_seq, pid) do { } while (0)
 793 #define trace_rcu_quiescent_state_report(rcuname, gp_seq, mask, qsmask, level, \
 794                                          grplo, grphi, gp_tasks) do { } \
 795         while (0)
 796 #define trace_rcu_fqs(rcuname, gp_seq, cpu, qsevent) do { } while (0)
 797 #else
 798 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
 799 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
 800                                     qsmask) do { } while (0)
 801 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
 802 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
 803 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
 804                                          grplo, grphi, gp_tasks) do { } \
 805         while (0)
 806 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
 807 #endif
 808
 809 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
 810 #define trace_rcu_dyntick(polarity, oldnesting, newnesting, dyntick) do { } while (0)
 811 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 812 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
 813 #else
 814 #define trace_rcu_dyntick(polarity) do { } while (0)
 815 #endif
 816 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 817 #define trace_rcu_prep_idle(reason) do { } while (0)
 818 #endif
 819 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 820 #define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
 821 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
 822         do { } while (0)
 823 #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
 824         do { } while (0)
 825 #else
 826 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
 827 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
 828 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
 829 #endif
 830 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
 831 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
 832 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 833 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
 834         do { } while (0)
 835 #else
 836 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
 837 #endif
 838 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 839 #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
 840         do { } while (0)
 841 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 842 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
 843 #endif
 844 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 845 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
 846 #endif
 847 #endif /* #else #ifdef CONFIG_RCU_TRACE */
 848
 849 #endif /* LTTNG_TRACE_RCU_H */
 850
 851 /* This part must be outside protection */
 852 #include <probes/define_trace.h>