instrumentation/events/lttng-module/rcu.h

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