instrumentation/events/lttng-module/rcu.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM rcu
   3
   4 #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define _TRACE_RCU_H
   6
   7 #include <linux/tracepoint.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 TRACE_EVENT(rcu_utilization,
  22
  23         TP_PROTO(char *s),
  24
  25         TP_ARGS(s),
  26
  27         TP_STRUCT__entry(
  28                 __string(s, s)
  29         ),
  30
  31         TP_fast_assign(
  32                 tp_strcpy(s, s)
  33         ),
  34
  35         TP_printk("%s", __get_str(s))
  36 )
  37
  38 #ifdef CONFIG_RCU_TRACE
  39
  40 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU)
  41
  42 /*
  43  * Tracepoint for grace-period events: starting and ending a grace
  44  * period ("start" and "end", respectively), a CPU noting the start
  45  * of a new grace period or the end of an old grace period ("cpustart"
  46  * and "cpuend", respectively), a CPU passing through a quiescent
  47  * state ("cpuqs"), a CPU coming online or going offline ("cpuonl"
  48  * and "cpuofl", respectively), and a CPU being kicked for being too
  49  * long in dyntick-idle mode ("kick").
  50  */
  51 TRACE_EVENT(rcu_grace_period,
  52
  53         TP_PROTO(char *rcuname, unsigned long gpnum, char *gpevent),
  54
  55         TP_ARGS(rcuname, gpnum, gpevent),
  56
  57         TP_STRUCT__entry(
  58                 __string(rcuname, rcuname)
  59                 __field(unsigned long, gpnum)
  60                 __string(gpevent, gpevent)
  61         ),
  62
  63         TP_fast_assign(
  64                 tp_strcpy(rcuname, rcuname)
  65                 tp_assign(gpnum, gpnum)
  66                 tp_strcpy(gpevent, gpevent)
  67         ),
  68
  69         TP_printk("%s %lu %s",
  70                   __get_str(rcuname), __entry->gpnum, __get_str(gpevent))
  71 )
  72
  73 /*
  74  * Tracepoint for grace-period-initialization events.  These are
  75  * distinguished by the type of RCU, the new grace-period number, the
  76  * rcu_node structure level, the starting and ending CPU covered by the
  77  * rcu_node structure, and the mask of CPUs that will be waited for.
  78  * All but the type of RCU are extracted from the rcu_node structure.
  79  */
  80 TRACE_EVENT(rcu_grace_period_init,
  81
  82         TP_PROTO(char *rcuname, unsigned long gpnum, u8 level,
  83                  int grplo, int grphi, unsigned long qsmask),
  84
  85         TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask),
  86
  87         TP_STRUCT__entry(
  88                 __string(rcuname, rcuname)
  89                 __field(unsigned long, gpnum)
  90                 __field(u8, level)
  91                 __field(int, grplo)
  92                 __field(int, grphi)
  93                 __field(unsigned long, qsmask)
  94         ),
  95
  96         TP_fast_assign(
  97                 tp_strcpy(rcuname, rcuname)
  98                 tp_assign(gpnum, gpnum)
  99                 tp_assign(level, level)
 100                 tp_assign(grplo, grplo)
 101                 tp_assign(grphi, grphi)
 102                 tp_assign(qsmask, qsmask)
 103         ),
 104
 105         TP_printk("%s %lu %u %d %d %lx",
 106                   __get_str(rcuname), __entry->gpnum, __entry->level,
 107                   __entry->grplo, __entry->grphi, __entry->qsmask)
 108 )
 109
 110 /*
 111  * Tracepoint for tasks blocking within preemptible-RCU read-side
 112  * critical sections.  Track the type of RCU (which one day might
 113  * include SRCU), the grace-period number that the task is blocking
 114  * (the current or the next), and the task's PID.
 115  */
 116 TRACE_EVENT(rcu_preempt_task,
 117
 118         TP_PROTO(char *rcuname, int pid, unsigned long gpnum),
 119
 120         TP_ARGS(rcuname, pid, gpnum),
 121
 122         TP_STRUCT__entry(
 123                 __string(rcuname, rcuname)
 124                 __field(unsigned long, gpnum)
 125                 __field(int, pid)
 126         ),
 127
 128         TP_fast_assign(
 129                 tp_strcpy(rcuname, rcuname)
 130                 tp_assign(gpnum, gpnum)
 131                 tp_assign(pid, pid)
 132         ),
 133
 134         TP_printk("%s %lu %d",
 135                   __get_str(rcuname), __entry->gpnum, __entry->pid)
 136 )
 137
 138 /*
 139  * Tracepoint for tasks that blocked within a given preemptible-RCU
 140  * read-side critical section exiting that critical section.  Track the
 141  * type of RCU (which one day might include SRCU) and the task's PID.
 142  */
 143 TRACE_EVENT(rcu_unlock_preempted_task,
 144
 145         TP_PROTO(char *rcuname, unsigned long gpnum, int pid),
 146
 147         TP_ARGS(rcuname, gpnum, pid),
 148
 149         TP_STRUCT__entry(
 150                 __string(rcuname, rcuname)
 151                 __field(unsigned long, gpnum)
 152                 __field(int, pid)
 153         ),
 154
 155         TP_fast_assign(
 156                 tp_strcpy(rcuname, rcuname)
 157                 tp_assign(gpnum, gpnum)
 158                 tp_assign(pid, pid)
 159         ),
 160
 161         TP_printk("%s %lu %d", __get_str(rcuname), __entry->gpnum, __entry->pid)
 162 )
 163
 164 /*
 165  * Tracepoint for quiescent-state-reporting events.  These are
 166  * distinguished by the type of RCU, the grace-period number, the
 167  * mask of quiescent lower-level entities, the rcu_node structure level,
 168  * the starting and ending CPU covered by the rcu_node structure, and
 169  * whether there are any blocked tasks blocking the current grace period.
 170  * All but the type of RCU are extracted from the rcu_node structure.
 171  */
 172 TRACE_EVENT(rcu_quiescent_state_report,
 173
 174         TP_PROTO(char *rcuname, unsigned long gpnum,
 175                  unsigned long mask, unsigned long qsmask,
 176                  u8 level, int grplo, int grphi, int gp_tasks),
 177
 178         TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks),
 179
 180         TP_STRUCT__entry(
 181                 __string(rcuname, rcuname)
 182                 __field(unsigned long, gpnum)
 183                 __field(unsigned long, mask)
 184                 __field(unsigned long, qsmask)
 185                 __field(u8, level)
 186                 __field(int, grplo)
 187                 __field(int, grphi)
 188                 __field(u8, gp_tasks)
 189         ),
 190
 191         TP_fast_assign(
 192                 tp_strcpy(rcuname, rcuname)
 193                 tp_assign(gpnum, gpnum)
 194                 tp_assign(mask, mask)
 195                 tp_assign(qsmask, qsmask)
 196                 tp_assign(level, level)
 197                 tp_assign(grplo, grplo)
 198                 tp_assign(grphi, grphi)
 199                 tp_assign(gp_tasks, gp_tasks)
 200         ),
 201
 202         TP_printk("%s %lu %lx>%lx %u %d %d %u",
 203                   __get_str(rcuname), __entry->gpnum,
 204                   __entry->mask, __entry->qsmask, __entry->level,
 205                   __entry->grplo, __entry->grphi, __entry->gp_tasks)
 206 )
 207
 208 /*
 209  * Tracepoint for quiescent states detected by force_quiescent_state().
 210  * These trace events include the type of RCU, the grace-period number
 211  * that was blocked by the CPU, the CPU itself, and the type of quiescent
 212  * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
 213  * or "kick" when kicking a CPU that has been in dyntick-idle mode for
 214  * too long.
 215  */
 216 TRACE_EVENT(rcu_fqs,
 217
 218         TP_PROTO(char *rcuname, unsigned long gpnum, int cpu, char *qsevent),
 219
 220         TP_ARGS(rcuname, gpnum, cpu, qsevent),
 221
 222         TP_STRUCT__entry(
 223                 __string(rcuname, rcuname)
 224                 __field(unsigned long, gpnum)
 225                 __field(int, cpu)
 226                 __string(qsevent, qsevent)
 227         ),
 228
 229         TP_fast_assign(
 230                 tp_strcpy(rcuname, rcuname)
 231                 tp_assign(gpnum, gpnum)
 232                 tp_assign(cpu, cpu)
 233                 tp_strcpy(qsevent, qsevent)
 234         ),
 235
 236         TP_printk("%s %lu %d %s",
 237                   __get_str(rcuname), __entry->gpnum,
 238                   __entry->cpu, __get_str(qsevent))
 239 )
 240
 241 #endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) */
 242
 243 /*
 244  * Tracepoint for dyntick-idle entry/exit events.  These take a string
 245  * as argument: "Start" for entering dyntick-idle mode, "End" for
 246  * leaving it, "--=" for events moving towards idle, and "++=" for events
 247  * moving away from idle.  "Error on entry: not idle task" and "Error on
 248  * exit: not idle task" indicate that a non-idle task is erroneously
 249  * toying with the idle loop.
 250  *
 251  * These events also take a pair of numbers, which indicate the nesting
 252  * depth before and after the event of interest.  Note that task-related
 253  * events use the upper bits of each number, while interrupt-related
 254  * events use the lower bits.
 255  */
 256 TRACE_EVENT(rcu_dyntick,
 257
 258 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 259         TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
 260
 261         TP_ARGS(polarity, oldnesting, newnesting),
 262 #else
 263         TP_PROTO(char *polarity),
 264
 265         TP_ARGS(polarity),
 266 #endif
 267
 268         TP_STRUCT__entry(
 269                 __string(polarity, polarity)
 270 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 271                 __field(long long, oldnesting)
 272                 __field(long long, newnesting)
 273 #endif
 274         ),
 275
 276         TP_fast_assign(
 277                 tp_strcpy(polarity, polarity)
 278 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 279                 tp_assign(oldnesting, oldnesting)
 280                 tp_assign(newnesting, newnesting)
 281 #endif
 282         ),
 283
 284 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 285         TP_printk("%s %llx %llx", __get_str(polarity),
 286                   __entry->oldnesting, __entry->newnesting)
 287 #else
 288         TP_printk("%s", __get_str(polarity))
 289 #endif
 290 )
 291
 292 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 293 /*
 294  * Tracepoint for RCU preparation for idle, the goal being to get RCU
 295  * processing done so that the current CPU can shut off its scheduling
 296  * clock and enter dyntick-idle mode.  One way to accomplish this is
 297  * to drain all RCU callbacks from this CPU, and the other is to have
 298  * done everything RCU requires for the current grace period.  In this
 299  * latter case, the CPU will be awakened at the end of the current grace
 300  * period in order to process the remainder of its callbacks.
 301  *
 302  * These tracepoints take a string as argument:
 303  *
 304  *      "No callbacks": Nothing to do, no callbacks on this CPU.
 305  *      "In holdoff": Nothing to do, holding off after unsuccessful attempt.
 306  *      "Begin holdoff": Attempt failed, don't retry until next jiffy.
 307  *      "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
 308  *      "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
 309  *      "More callbacks": Still more callbacks, try again to clear them out.
 310  *      "Callbacks drained": All callbacks processed, off to dyntick idle!
 311  *      "Timer": Timer fired to cause CPU to continue processing callbacks.
 312  *      "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
 313  *      "Cleanup after idle": Idle exited, timer canceled.
 314  */
 315 TRACE_EVENT(rcu_prep_idle,
 316
 317         TP_PROTO(char *reason),
 318
 319         TP_ARGS(reason),
 320
 321         TP_STRUCT__entry(
 322                 __string(reason, reason)
 323         ),
 324
 325         TP_fast_assign(
 326                 tp_strcpy(reason, reason)
 327         ),
 328
 329         TP_printk("%s", __get_str(reason))
 330 )
 331 #endif
 332
 333 /*
 334  * Tracepoint for the registration of a single RCU callback function.
 335  * The first argument is the type of RCU, the second argument is
 336  * a pointer to the RCU callback itself, the third element is the
 337  * number of lazy callbacks queued, and the fourth element is the
 338  * total number of callbacks queued.
 339  */
 340 TRACE_EVENT(rcu_callback,
 341
 342 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 343         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen_lazy,
 344                  long qlen),
 345
 346         TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
 347 #else
 348         TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen),
 349
 350         TP_ARGS(rcuname, rhp, qlen),
 351 #endif
 352
 353         TP_STRUCT__entry(
 354                 __string(rcuname, rcuname)
 355                 __field(void *, rhp)
 356                 __field(void *, func)
 357 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 358                 __field(long, qlen_lazy)
 359 #endif
 360                 __field(long, qlen)
 361         ),
 362
 363         TP_fast_assign(
 364                 tp_strcpy(rcuname, rcuname)
 365                 tp_assign(rhp, rhp)
 366                 tp_assign(func, rhp->func)
 367 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 368                 tp_assign(qlen_lazy, qlen_lazy)
 369 #endif
 370                 tp_assign(qlen, qlen)
 371         ),
 372
 373 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 374         TP_printk("%s rhp=%p func=%pf %ld/%ld",
 375                   __get_str(rcuname), __entry->rhp, __entry->func,
 376                   __entry->qlen_lazy, __entry->qlen)
 377 #else
 378         TP_printk("%s rhp=%p func=%pf %ld",
 379                   __get_str(rcuname), __entry->rhp, __entry->func,
 380                   __entry->qlen)
 381 #endif
 382 )
 383
 384 /*
 385  * Tracepoint for the registration of a single RCU callback of the special
 386  * kfree() form.  The first argument is the RCU type, the second argument
 387  * is a pointer to the RCU callback, the third argument is the offset
 388  * of the callback within the enclosing RCU-protected data structure,
 389  * the fourth argument is the number of lazy callbacks queued, and the
 390  * fifth argument is the total number of callbacks queued.
 391  */
 392 TRACE_EVENT(rcu_kfree_callback,
 393
 394 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 395         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 396                  long qlen_lazy, long qlen),
 397
 398         TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
 399 #else
 400         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
 401                  long qlen),
 402
 403         TP_ARGS(rcuname, rhp, offset, qlen),
 404 #endif
 405
 406         TP_STRUCT__entry(
 407                 __string(rcuname, rcuname)
 408                 __field(void *, rhp)
 409                 __field(unsigned long, offset)
 410 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 411                 __field(long, qlen_lazy)
 412 #endif
 413                 __field(long, qlen)
 414         ),
 415
 416         TP_fast_assign(
 417                 tp_strcpy(rcuname, rcuname)
 418                 tp_assign(rhp, rhp)
 419                 tp_assign(offset, offset)
 420 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 421                 tp_assign(qlen_lazy, qlen_lazy)
 422 #endif
 423                 tp_assign(qlen, qlen)
 424         ),
 425
 426 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 427         TP_printk("%s rhp=%p func=%ld %ld/%ld",
 428                   __get_str(rcuname), __entry->rhp, __entry->offset,
 429                   __entry->qlen_lazy, __entry->qlen)
 430 #else
 431         TP_printk("%s rhp=%p func=%ld %ld",
 432                   __get_str(rcuname), __entry->rhp, __entry->offset,
 433                   __entry->qlen)
 434 #endif
 435 )
 436
 437 /*
 438  * Tracepoint for marking the beginning rcu_do_batch, performed to start
 439  * RCU callback invocation.  The first argument is the RCU flavor,
 440  * the second is the number of lazy callbacks queued, the third is
 441  * the total number of callbacks queued, and the fourth argument is
 442  * the current RCU-callback batch limit.
 443  */
 444 TRACE_EVENT(rcu_batch_start,
 445
 446 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 447         TP_PROTO(char *rcuname, long qlen_lazy, long qlen, int blimit),
 448
 449         TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
 450 #else
 451         TP_PROTO(char *rcuname, long qlen, int blimit),
 452
 453         TP_ARGS(rcuname, qlen, blimit),
 454 #endif
 455
 456         TP_STRUCT__entry(
 457                 __string(rcuname, rcuname)
 458 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 459                 __field(long, qlen_lazy)
 460 #endif
 461                 __field(long, qlen)
 462                 __field(int, blimit)
 463         ),
 464
 465         TP_fast_assign(
 466                 tp_strcpy(rcuname, rcuname)
 467 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 468                 tp_assign(qlen_lazy, qlen_lazy)
 469 #endif
 470                 tp_assign(qlen, qlen)
 471                 tp_assign(blimit, blimit)
 472         ),
 473
 474 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 475         TP_printk("%s CBs=%ld/%ld bl=%d",
 476                   __get_str(rcuname), __entry->qlen_lazy, __entry->qlen,
 477                   __entry->blimit)
 478 #else
 479         TP_printk("%s CBs=%ld bl=%d",
 480                   __get_str(rcuname), __entry->qlen, __entry->blimit)
 481 #endif
 482 )
 483
 484 /*
 485  * Tracepoint for the invocation of a single RCU callback function.
 486  * The first argument is the type of RCU, and the second argument is
 487  * a pointer to the RCU callback itself.
 488  */
 489 TRACE_EVENT(rcu_invoke_callback,
 490
 491         TP_PROTO(char *rcuname, struct rcu_head *rhp),
 492
 493         TP_ARGS(rcuname, rhp),
 494
 495         TP_STRUCT__entry(
 496                 __string(rcuname, rcuname)
 497                 __field(void *, rhp)
 498                 __field(void *, func)
 499         ),
 500
 501         TP_fast_assign(
 502                 tp_strcpy(rcuname, rcuname)
 503                 tp_assign(rhp, rhp)
 504                 tp_assign(func, rhp->func)
 505         ),
 506
 507         TP_printk("%s rhp=%p func=%pf",
 508                   __get_str(rcuname), __entry->rhp, __entry->func)
 509 )
 510
 511 /*
 512  * Tracepoint for the invocation of a single RCU callback of the special
 513  * kfree() form.  The first argument is the RCU flavor, the second
 514  * argument is a pointer to the RCU callback, and the third argument
 515  * is the offset of the callback within the enclosing RCU-protected
 516  * data structure.
 517  */
 518 TRACE_EVENT(rcu_invoke_kfree_callback,
 519
 520         TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset),
 521
 522         TP_ARGS(rcuname, rhp, offset),
 523
 524         TP_STRUCT__entry(
 525                 __string(rcuname, rcuname)
 526                 __field(void *, rhp)
 527                 __field(unsigned long, offset)
 528         ),
 529
 530         TP_fast_assign(
 531                 tp_strcpy(rcuname, rcuname)
 532                 tp_assign(rhp, rhp)
 533                 tp_assign(offset, offset)
 534         ),
 535
 536         TP_printk("%s rhp=%p func=%ld",
 537                   __get_str(rcuname), __entry->rhp, __entry->offset)
 538 )
 539
 540 /*
 541  * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
 542  * invoked.  The first argument is the name of the RCU flavor,
 543  * the second argument is number of callbacks actually invoked,
 544  * the third argument (cb) is whether or not any of the callbacks that
 545  * were ready to invoke at the beginning of this batch are still
 546  * queued, the fourth argument (nr) is the return value of need_resched(),
 547  * the fifth argument (iit) is 1 if the current task is the idle task,
 548  * and the sixth argument (risk) is the return value from
 549  * rcu_is_callbacks_kthread().
 550  */
 551 TRACE_EVENT(rcu_batch_end,
 552
 553 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 554         TP_PROTO(char *rcuname, int callbacks_invoked,
 555                  bool cb, bool nr, bool iit, bool risk),
 556
 557         TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 558 #else
 559         TP_PROTO(char *rcuname, int callbacks_invoked),
 560
 561         TP_ARGS(rcuname, callbacks_invoked),
 562 #endif
 563
 564         TP_STRUCT__entry(
 565                 __string(rcuname, rcuname)
 566                 __field(int, callbacks_invoked)
 567 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 568                 __field(bool, cb)
 569                 __field(bool, nr)
 570                 __field(bool, iit)
 571                 __field(bool, risk)
 572 #endif
 573         ),
 574
 575         TP_fast_assign(
 576                 tp_strcpy(rcuname, rcuname)
 577                 tp_assign(callbacks_invoked, callbacks_invoked)
 578 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 579                 tp_assign(cb, cb)
 580                 tp_assign(nr, nr)
 581                 tp_assign(iit, iit)
 582                 tp_assign(risk, risk)
 583 #endif
 584         ),
 585
 586 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 587         TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
 588                   __get_str(rcuname), __entry->callbacks_invoked,
 589                   __entry->cb ? 'C' : '.',
 590                   __entry->nr ? 'S' : '.',
 591                   __entry->iit ? 'I' : '.',
 592                   __entry->risk ? 'R' : '.')
 593 #else
 594         TP_printk("%s CBs-invoked=%d",
 595                   __get_str(rcuname), __entry->callbacks_invoked)
 596 #endif
 597 )
 598
 599 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 600 /*
 601  * Tracepoint for rcutorture readers.  The first argument is the name
 602  * of the RCU flavor from rcutorture's viewpoint and the second argument
 603  * is the callback address.
 604  */
 605 TRACE_EVENT(rcu_torture_read,
 606
 607         TP_PROTO(char *rcutorturename, struct rcu_head *rhp),
 608
 609         TP_ARGS(rcutorturename, rhp),
 610
 611         TP_STRUCT__entry(
 612                 __string(rcutorturename, rcutorturename)
 613                 __field(struct rcu_head *, rhp)
 614         ),
 615
 616         TP_fast_assign(
 617                 tp_strcpy(rcutorturename, rcutorturename)
 618                 tp_assign(rhp, rhp)
 619         ),
 620
 621         TP_printk("%s torture read %p",
 622                   __get_str(rcutorturename), __entry->rhp)
 623 )
 624 #endif
 625
 626 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 627 /*
 628  * Tracepoint for _rcu_barrier() execution.  The string "s" describes
 629  * the _rcu_barrier phase:
 630  *      "Begin": rcu_barrier_callback() started.
 631  *      "Check": rcu_barrier_callback() checking for piggybacking.
 632  *      "EarlyExit": rcu_barrier_callback() piggybacked, thus early exit.
 633  *      "Inc1": rcu_barrier_callback() piggyback check counter incremented.
 634  *      "Offline": rcu_barrier_callback() found offline CPU
 635  *      "OnlineQ": rcu_barrier_callback() found online CPU with callbacks.
 636  *      "OnlineNQ": rcu_barrier_callback() found online CPU, no callbacks.
 637  *      "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
 638  *      "CB": An rcu_barrier_callback() invoked a callback, not the last.
 639  *      "LastCB": An rcu_barrier_callback() invoked the last callback.
 640  *      "Inc2": rcu_barrier_callback() piggyback check counter incremented.
 641  * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
 642  * is the count of remaining callbacks, and "done" is the piggybacking count.
 643  */
 644 TRACE_EVENT(rcu_barrier,
 645
 646         TP_PROTO(char *rcuname, char *s, int cpu, int cnt, unsigned long done),
 647
 648         TP_ARGS(rcuname, s, cpu, cnt, done),
 649
 650         TP_STRUCT__entry(
 651                 __string(rcuname, rcuname)
 652                 __string(s, s)
 653                 __field(int, cpu)
 654                 __field(int, cnt)
 655                 __field(unsigned long, done)
 656         ),
 657
 658         TP_fast_assign(
 659                 tp_strcpy(rcuname, rcuname)
 660                 tp_strcpy(s, s)
 661                 tp_assign(cpu, cpu)
 662                 tp_assign(cnt, cnt)
 663                 tp_assign(done, done)
 664         ),
 665
 666         TP_printk("%s %s cpu %d remaining %d # %lu",
 667                   __get_str(rcuname), __get_str(s), __entry->cpu, __entry->cnt,
 668                   __entry->done)
 669 )
 670 #endif
 671
 672 #else /* #ifdef CONFIG_RCU_TRACE */
 673
 674 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
 675 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
 676                                     qsmask) do { } while (0)
 677 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
 678 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
 679 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
 680                                          grplo, grphi, gp_tasks) do { } \
 681         while (0)
 682 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
 683 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 684 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
 685 #else
 686 #define trace_rcu_dyntick(polarity) do { } while (0)
 687 #endif
 688 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 689 #define trace_rcu_prep_idle(reason) do { } while (0)
 690 #endif
 691 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 692 #define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
 693 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
 694         do { } while (0)
 695 #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
 696         do { } while (0)
 697 #else
 698 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
 699 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
 700 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
 701 #endif
 702 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
 703 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
 704 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 705 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
 706         do { } while (0)
 707 #else
 708 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
 709 #endif
 710 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 711 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
 712 #endif
 713 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 714 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
 715 #endif
 716 #endif /* #else #ifdef CONFIG_RCU_TRACE */
 717
 718 #endif /* _TRACE_RCU_H */
 719
 720 /* This part must be outside protection */
 721 #include "../../../probes/define_trace.h"