1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define TRACE_SYSTEM rcu
5 #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
8 #include <linux/tracepoint.h>
11 * Tracepoint for start/end markers used for utilization calculations.
12 * By convention, the string is of the following forms:
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.
18 * An "@" character within "<activity>" is a comment character: Data
19 * reduction scripts will ignore the "@" and the remainder of the line.
21 TRACE_EVENT(rcu_utilization
,
23 TP_PROTO(const char *s
),
28 __field(const char *, s
)
35 TP_printk("%s", __entry
->s
)
38 #ifdef CONFIG_RCU_TRACE
40 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
43 * Tracepoint for grace-period events. Takes a string identifying the
44 * RCU flavor, the grace-period number, and a string identifying the
45 * grace-period-related event as follows:
47 * "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL.
48 * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL.
49 * "newreq": Request a new grace period.
50 * "start": Start a grace period.
51 * "cpustart": CPU first notices a grace-period start.
52 * "cpuqs": CPU passes through a quiescent state.
53 * "cpuonl": CPU comes online.
54 * "cpuofl": CPU goes offline.
55 * "reqwait": GP kthread sleeps waiting for grace-period request.
56 * "reqwaitsig": GP kthread awakened by signal from reqwait state.
57 * "fqswait": GP kthread waiting until time to force quiescent states.
58 * "fqsstart": GP kthread starts forcing quiescent states.
59 * "fqsend": GP kthread done forcing quiescent states.
60 * "fqswaitsig": GP kthread awakened by signal from fqswait state.
61 * "end": End a grace period.
62 * "cpuend": CPU first notices a grace-period end.
64 TRACE_EVENT(rcu_grace_period
,
66 TP_PROTO(const char *rcuname
, unsigned long gpnum
, const char *gpevent
),
68 TP_ARGS(rcuname
, gpnum
, gpevent
),
71 __field(const char *, rcuname
)
72 __field(unsigned long, gpnum
)
73 __field(const char *, gpevent
)
77 __entry
->rcuname
= rcuname
;
78 __entry
->gpnum
= gpnum
;
79 __entry
->gpevent
= gpevent
;
82 TP_printk("%s %lu %s",
83 __entry
->rcuname
, __entry
->gpnum
, __entry
->gpevent
)
87 * Tracepoint for future grace-period events, including those for no-callbacks
88 * CPUs. The caller should pull the data from the rcu_node structure,
89 * other than rcuname, which comes from the rcu_state structure, and event,
90 * which is one of the following:
92 * "Startleaf": Request a nocb grace period based on leaf-node data.
93 * "Startedleaf": Leaf-node start proved sufficient.
94 * "Startedleafroot": Leaf-node start proved sufficient after checking root.
95 * "Startedroot": Requested a nocb grace period based on root-node data.
96 * "StartWait": Start waiting for the requested grace period.
97 * "ResumeWait": Resume waiting after signal.
98 * "EndWait": Complete wait.
99 * "Cleanup": Clean up rcu_node structure after previous GP.
100 * "CleanupMore": Clean up, and another no-CB GP is needed.
102 TRACE_EVENT(rcu_future_grace_period
,
104 TP_PROTO(const char *rcuname
, unsigned long gpnum
, unsigned long completed
,
105 unsigned long c
, u8 level
, int grplo
, int grphi
,
106 const char *gpevent
),
108 TP_ARGS(rcuname
, gpnum
, completed
, c
, level
, grplo
, grphi
, gpevent
),
111 __field(const char *, rcuname
)
112 __field(unsigned long, gpnum
)
113 __field(unsigned long, completed
)
114 __field(unsigned long, c
)
118 __field(const char *, gpevent
)
122 __entry
->rcuname
= rcuname
;
123 __entry
->gpnum
= gpnum
;
124 __entry
->completed
= completed
;
126 __entry
->level
= level
;
127 __entry
->grplo
= grplo
;
128 __entry
->grphi
= grphi
;
129 __entry
->gpevent
= gpevent
;
132 TP_printk("%s %lu %lu %lu %u %d %d %s",
133 __entry
->rcuname
, __entry
->gpnum
, __entry
->completed
,
134 __entry
->c
, __entry
->level
, __entry
->grplo
, __entry
->grphi
,
139 * Tracepoint for grace-period-initialization events. These are
140 * distinguished by the type of RCU, the new grace-period number, the
141 * rcu_node structure level, the starting and ending CPU covered by the
142 * rcu_node structure, and the mask of CPUs that will be waited for.
143 * All but the type of RCU are extracted from the rcu_node structure.
145 TRACE_EVENT(rcu_grace_period_init
,
147 TP_PROTO(const char *rcuname
, unsigned long gpnum
, u8 level
,
148 int grplo
, int grphi
, unsigned long qsmask
),
150 TP_ARGS(rcuname
, gpnum
, level
, grplo
, grphi
, qsmask
),
153 __field(const char *, rcuname
)
154 __field(unsigned long, gpnum
)
158 __field(unsigned long, qsmask
)
162 __entry
->rcuname
= rcuname
;
163 __entry
->gpnum
= gpnum
;
164 __entry
->level
= level
;
165 __entry
->grplo
= grplo
;
166 __entry
->grphi
= grphi
;
167 __entry
->qsmask
= qsmask
;
170 TP_printk("%s %lu %u %d %d %lx",
171 __entry
->rcuname
, __entry
->gpnum
, __entry
->level
,
172 __entry
->grplo
, __entry
->grphi
, __entry
->qsmask
)
176 * Tracepoint for expedited grace-period events. Takes a string identifying
177 * the RCU flavor, the expedited grace-period sequence number, and a string
178 * identifying the grace-period-related event as follows:
180 * "snap": Captured snapshot of expedited grace period sequence number.
181 * "start": Started a real expedited grace period.
182 * "end": Ended a real expedited grace period.
183 * "endwake": Woke piggybackers up.
184 * "done": Someone else did the expedited grace period for us.
186 TRACE_EVENT(rcu_exp_grace_period
,
188 TP_PROTO(const char *rcuname
, unsigned long gpseq
, const char *gpevent
),
190 TP_ARGS(rcuname
, gpseq
, gpevent
),
193 __field(const char *, rcuname
)
194 __field(unsigned long, gpseq
)
195 __field(const char *, gpevent
)
199 __entry
->rcuname
= rcuname
;
200 __entry
->gpseq
= gpseq
;
201 __entry
->gpevent
= gpevent
;
204 TP_printk("%s %lu %s",
205 __entry
->rcuname
, __entry
->gpseq
, __entry
->gpevent
)
209 * Tracepoint for expedited grace-period funnel-locking events. Takes a
210 * string identifying the RCU flavor, an integer identifying the rcu_node
211 * combining-tree level, another pair of integers identifying the lowest-
212 * and highest-numbered CPU associated with the current rcu_node structure,
213 * and a string. identifying the grace-period-related event as follows:
215 * "nxtlvl": Advance to next level of rcu_node funnel
216 * "wait": Wait for someone else to do expedited GP
218 TRACE_EVENT(rcu_exp_funnel_lock
,
220 TP_PROTO(const char *rcuname
, u8 level
, int grplo
, int grphi
,
221 const char *gpevent
),
223 TP_ARGS(rcuname
, level
, grplo
, grphi
, gpevent
),
226 __field(const char *, rcuname
)
230 __field(const char *, gpevent
)
234 __entry
->rcuname
= rcuname
;
235 __entry
->level
= level
;
236 __entry
->grplo
= grplo
;
237 __entry
->grphi
= grphi
;
238 __entry
->gpevent
= gpevent
;
241 TP_printk("%s %d %d %d %s",
242 __entry
->rcuname
, __entry
->level
, __entry
->grplo
,
243 __entry
->grphi
, __entry
->gpevent
)
247 * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
248 * to assist debugging of these handoffs.
250 * The first argument is the name of the RCU flavor, and the second is
251 * the number of the offloaded CPU are extracted. The third and final
252 * argument is a string as follows:
254 * "WakeEmpty": Wake rcuo kthread, first CB to empty list.
255 * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
256 * "WakeOvf": Wake rcuo kthread, CB list is huge.
257 * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
258 * "WakeNot": Don't wake rcuo kthread.
259 * "WakeNotPoll": Don't wake rcuo kthread because it is polling.
260 * "DeferredWake": Carried out the "IsDeferred" wakeup.
261 * "Poll": Start of new polling cycle for rcu_nocb_poll.
262 * "Sleep": Sleep waiting for CBs for !rcu_nocb_poll.
263 * "WokeEmpty": rcuo kthread woke to find empty list.
264 * "WokeNonEmpty": rcuo kthread woke to find non-empty list.
265 * "WaitQueue": Enqueue partially done, timed wait for it to complete.
266 * "WokeQueue": Partial enqueue now complete.
268 TRACE_EVENT(rcu_nocb_wake
,
270 TP_PROTO(const char *rcuname
, int cpu
, const char *reason
),
272 TP_ARGS(rcuname
, cpu
, reason
),
275 __field(const char *, rcuname
)
277 __field(const char *, reason
)
281 __entry
->rcuname
= rcuname
;
283 __entry
->reason
= reason
;
286 TP_printk("%s %d %s", __entry
->rcuname
, __entry
->cpu
, __entry
->reason
)
290 * Tracepoint for tasks blocking within preemptible-RCU read-side
291 * critical sections. Track the type of RCU (which one day might
292 * include SRCU), the grace-period number that the task is blocking
293 * (the current or the next), and the task's PID.
295 TRACE_EVENT(rcu_preempt_task
,
297 TP_PROTO(const char *rcuname
, int pid
, unsigned long gpnum
),
299 TP_ARGS(rcuname
, pid
, gpnum
),
302 __field(const char *, rcuname
)
303 __field(unsigned long, gpnum
)
308 __entry
->rcuname
= rcuname
;
309 __entry
->gpnum
= gpnum
;
313 TP_printk("%s %lu %d",
314 __entry
->rcuname
, __entry
->gpnum
, __entry
->pid
)
318 * Tracepoint for tasks that blocked within a given preemptible-RCU
319 * read-side critical section exiting that critical section. Track the
320 * type of RCU (which one day might include SRCU) and the task's PID.
322 TRACE_EVENT(rcu_unlock_preempted_task
,
324 TP_PROTO(const char *rcuname
, unsigned long gpnum
, int pid
),
326 TP_ARGS(rcuname
, gpnum
, pid
),
329 __field(const char *, rcuname
)
330 __field(unsigned long, gpnum
)
335 __entry
->rcuname
= rcuname
;
336 __entry
->gpnum
= gpnum
;
340 TP_printk("%s %lu %d", __entry
->rcuname
, __entry
->gpnum
, __entry
->pid
)
344 * Tracepoint for quiescent-state-reporting events. These are
345 * distinguished by the type of RCU, the grace-period number, the
346 * mask of quiescent lower-level entities, the rcu_node structure level,
347 * the starting and ending CPU covered by the rcu_node structure, and
348 * whether there are any blocked tasks blocking the current grace period.
349 * All but the type of RCU are extracted from the rcu_node structure.
351 TRACE_EVENT(rcu_quiescent_state_report
,
353 TP_PROTO(const char *rcuname
, unsigned long gpnum
,
354 unsigned long mask
, unsigned long qsmask
,
355 u8 level
, int grplo
, int grphi
, int gp_tasks
),
357 TP_ARGS(rcuname
, gpnum
, mask
, qsmask
, level
, grplo
, grphi
, gp_tasks
),
360 __field(const char *, rcuname
)
361 __field(unsigned long, gpnum
)
362 __field(unsigned long, mask
)
363 __field(unsigned long, qsmask
)
367 __field(u8
, gp_tasks
)
371 __entry
->rcuname
= rcuname
;
372 __entry
->gpnum
= gpnum
;
373 __entry
->mask
= mask
;
374 __entry
->qsmask
= qsmask
;
375 __entry
->level
= level
;
376 __entry
->grplo
= grplo
;
377 __entry
->grphi
= grphi
;
378 __entry
->gp_tasks
= gp_tasks
;
381 TP_printk("%s %lu %lx>%lx %u %d %d %u",
382 __entry
->rcuname
, __entry
->gpnum
,
383 __entry
->mask
, __entry
->qsmask
, __entry
->level
,
384 __entry
->grplo
, __entry
->grphi
, __entry
->gp_tasks
)
388 * Tracepoint for quiescent states detected by force_quiescent_state().
389 * These trace events include the type of RCU, the grace-period number that
390 * was blocked by the CPU, the CPU itself, and the type of quiescent state,
391 * which can be "dti" for dyntick-idle mode, "ofl" for CPU offline, "kick"
392 * when kicking a CPU that has been in dyntick-idle mode for too long, or
393 * "rqc" if the CPU got a quiescent state via its rcu_qs_ctr.
397 TP_PROTO(const char *rcuname
, unsigned long gpnum
, int cpu
, const char *qsevent
),
399 TP_ARGS(rcuname
, gpnum
, cpu
, qsevent
),
402 __field(const char *, rcuname
)
403 __field(unsigned long, gpnum
)
405 __field(const char *, qsevent
)
409 __entry
->rcuname
= rcuname
;
410 __entry
->gpnum
= gpnum
;
412 __entry
->qsevent
= qsevent
;
415 TP_printk("%s %lu %d %s",
416 __entry
->rcuname
, __entry
->gpnum
,
417 __entry
->cpu
, __entry
->qsevent
)
420 #endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) */
423 * Tracepoint for dyntick-idle entry/exit events. These take a string
424 * as argument: "Start" for entering dyntick-idle mode, "End" for
425 * leaving it, "--=" for events moving towards idle, and "++=" for events
426 * moving away from idle. "Error on entry: not idle task" and "Error on
427 * exit: not idle task" indicate that a non-idle task is erroneously
428 * toying with the idle loop.
430 * These events also take a pair of numbers, which indicate the nesting
431 * depth before and after the event of interest. Note that task-related
432 * events use the upper bits of each number, while interrupt-related
433 * events use the lower bits.
435 TRACE_EVENT(rcu_dyntick
,
437 TP_PROTO(const char *polarity
, long long oldnesting
, long long newnesting
),
439 TP_ARGS(polarity
, oldnesting
, newnesting
),
442 __field(const char *, polarity
)
443 __field(long long, oldnesting
)
444 __field(long long, newnesting
)
448 __entry
->polarity
= polarity
;
449 __entry
->oldnesting
= oldnesting
;
450 __entry
->newnesting
= newnesting
;
453 TP_printk("%s %llx %llx", __entry
->polarity
,
454 __entry
->oldnesting
, __entry
->newnesting
)
458 * Tracepoint for RCU preparation for idle, the goal being to get RCU
459 * processing done so that the current CPU can shut off its scheduling
460 * clock and enter dyntick-idle mode. One way to accomplish this is
461 * to drain all RCU callbacks from this CPU, and the other is to have
462 * done everything RCU requires for the current grace period. In this
463 * latter case, the CPU will be awakened at the end of the current grace
464 * period in order to process the remainder of its callbacks.
466 * These tracepoints take a string as argument:
468 * "No callbacks": Nothing to do, no callbacks on this CPU.
469 * "In holdoff": Nothing to do, holding off after unsuccessful attempt.
470 * "Begin holdoff": Attempt failed, don't retry until next jiffy.
471 * "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
472 * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
473 * "More callbacks": Still more callbacks, try again to clear them out.
474 * "Callbacks drained": All callbacks processed, off to dyntick idle!
475 * "Timer": Timer fired to cause CPU to continue processing callbacks.
476 * "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
477 * "Cleanup after idle": Idle exited, timer canceled.
479 TRACE_EVENT(rcu_prep_idle
,
481 TP_PROTO(const char *reason
),
486 __field(const char *, reason
)
490 __entry
->reason
= reason
;
493 TP_printk("%s", __entry
->reason
)
497 * Tracepoint for the registration of a single RCU callback function.
498 * The first argument is the type of RCU, the second argument is
499 * a pointer to the RCU callback itself, the third element is the
500 * number of lazy callbacks queued, and the fourth element is the
501 * total number of callbacks queued.
503 TRACE_EVENT(rcu_callback
,
505 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, long qlen_lazy
,
508 TP_ARGS(rcuname
, rhp
, qlen_lazy
, qlen
),
511 __field(const char *, rcuname
)
513 __field(void *, func
)
514 __field(long, qlen_lazy
)
519 __entry
->rcuname
= rcuname
;
521 __entry
->func
= rhp
->func
;
522 __entry
->qlen_lazy
= qlen_lazy
;
523 __entry
->qlen
= qlen
;
526 TP_printk("%s rhp=%p func=%pf %ld/%ld",
527 __entry
->rcuname
, __entry
->rhp
, __entry
->func
,
528 __entry
->qlen_lazy
, __entry
->qlen
)
532 * Tracepoint for the registration of a single RCU callback of the special
533 * kfree() form. The first argument is the RCU type, the second argument
534 * is a pointer to the RCU callback, the third argument is the offset
535 * of the callback within the enclosing RCU-protected data structure,
536 * the fourth argument is the number of lazy callbacks queued, and the
537 * fifth argument is the total number of callbacks queued.
539 TRACE_EVENT(rcu_kfree_callback
,
541 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
542 long qlen_lazy
, long qlen
),
544 TP_ARGS(rcuname
, rhp
, offset
, qlen_lazy
, qlen
),
547 __field(const char *, rcuname
)
549 __field(unsigned long, offset
)
550 __field(long, qlen_lazy
)
555 __entry
->rcuname
= rcuname
;
557 __entry
->offset
= offset
;
558 __entry
->qlen_lazy
= qlen_lazy
;
559 __entry
->qlen
= qlen
;
562 TP_printk("%s rhp=%p func=%ld %ld/%ld",
563 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
,
564 __entry
->qlen_lazy
, __entry
->qlen
)
568 * Tracepoint for marking the beginning rcu_do_batch, performed to start
569 * RCU callback invocation. The first argument is the RCU flavor,
570 * the second is the number of lazy callbacks queued, the third is
571 * the total number of callbacks queued, and the fourth argument is
572 * the current RCU-callback batch limit.
574 TRACE_EVENT(rcu_batch_start
,
576 TP_PROTO(const char *rcuname
, long qlen_lazy
, long qlen
, long blimit
),
578 TP_ARGS(rcuname
, qlen_lazy
, qlen
, blimit
),
581 __field(const char *, rcuname
)
582 __field(long, qlen_lazy
)
584 __field(long, blimit
)
588 __entry
->rcuname
= rcuname
;
589 __entry
->qlen_lazy
= qlen_lazy
;
590 __entry
->qlen
= qlen
;
591 __entry
->blimit
= blimit
;
594 TP_printk("%s CBs=%ld/%ld bl=%ld",
595 __entry
->rcuname
, __entry
->qlen_lazy
, __entry
->qlen
,
600 * Tracepoint for the invocation of a single RCU callback function.
601 * The first argument is the type of RCU, and the second argument is
602 * a pointer to the RCU callback itself.
604 TRACE_EVENT(rcu_invoke_callback
,
606 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
),
608 TP_ARGS(rcuname
, rhp
),
611 __field(const char *, rcuname
)
613 __field(void *, func
)
617 __entry
->rcuname
= rcuname
;
619 __entry
->func
= rhp
->func
;
622 TP_printk("%s rhp=%p func=%pf",
623 __entry
->rcuname
, __entry
->rhp
, __entry
->func
)
627 * Tracepoint for the invocation of a single RCU callback of the special
628 * kfree() form. The first argument is the RCU flavor, the second
629 * argument is a pointer to the RCU callback, and the third argument
630 * is the offset of the callback within the enclosing RCU-protected
633 TRACE_EVENT(rcu_invoke_kfree_callback
,
635 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
),
637 TP_ARGS(rcuname
, rhp
, offset
),
640 __field(const char *, rcuname
)
642 __field(unsigned long, offset
)
646 __entry
->rcuname
= rcuname
;
648 __entry
->offset
= offset
;
651 TP_printk("%s rhp=%p func=%ld",
652 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
)
656 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
657 * invoked. The first argument is the name of the RCU flavor,
658 * the second argument is number of callbacks actually invoked,
659 * the third argument (cb) is whether or not any of the callbacks that
660 * were ready to invoke at the beginning of this batch are still
661 * queued, the fourth argument (nr) is the return value of need_resched(),
662 * the fifth argument (iit) is 1 if the current task is the idle task,
663 * and the sixth argument (risk) is the return value from
664 * rcu_is_callbacks_kthread().
666 TRACE_EVENT(rcu_batch_end
,
668 TP_PROTO(const char *rcuname
, int callbacks_invoked
,
669 char cb
, char nr
, char iit
, char risk
),
671 TP_ARGS(rcuname
, callbacks_invoked
, cb
, nr
, iit
, risk
),
674 __field(const char *, rcuname
)
675 __field(int, callbacks_invoked
)
683 __entry
->rcuname
= rcuname
;
684 __entry
->callbacks_invoked
= callbacks_invoked
;
688 __entry
->risk
= risk
;
691 TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
692 __entry
->rcuname
, __entry
->callbacks_invoked
,
693 __entry
->cb
? 'C' : '.',
694 __entry
->nr
? 'S' : '.',
695 __entry
->iit
? 'I' : '.',
696 __entry
->risk
? 'R' : '.')
700 * Tracepoint for rcutorture readers. The first argument is the name
701 * of the RCU flavor from rcutorture's viewpoint and the second argument
702 * is the callback address. The third argument is the start time in
703 * seconds, and the last two arguments are the grace period numbers
704 * at the beginning and end of the read, respectively. Note that the
705 * callback address can be NULL.
707 #define RCUTORTURENAME_LEN 8
708 TRACE_EVENT(rcu_torture_read
,
710 TP_PROTO(const char *rcutorturename
, struct rcu_head
*rhp
,
711 unsigned long secs
, unsigned long c_old
, unsigned long c
),
713 TP_ARGS(rcutorturename
, rhp
, secs
, c_old
, c
),
716 __field(char, rcutorturename
[RCUTORTURENAME_LEN
])
717 __field(struct rcu_head
*, rhp
)
718 __field(unsigned long, secs
)
719 __field(unsigned long, c_old
)
720 __field(unsigned long, c
)
724 strncpy(__entry
->rcutorturename
, rcutorturename
,
726 __entry
->rcutorturename
[RCUTORTURENAME_LEN
- 1] = 0;
728 __entry
->secs
= secs
;
729 __entry
->c_old
= c_old
;
733 TP_printk("%s torture read %p %luus c: %lu %lu",
734 __entry
->rcutorturename
, __entry
->rhp
,
735 __entry
->secs
, __entry
->c_old
, __entry
->c
)
739 * Tracepoint for _rcu_barrier() execution. The string "s" describes
740 * the _rcu_barrier phase:
741 * "Begin": _rcu_barrier() started.
742 * "EarlyExit": _rcu_barrier() piggybacked, thus early exit.
743 * "Inc1": _rcu_barrier() piggyback check counter incremented.
744 * "OfflineNoCB": _rcu_barrier() found callback on never-online CPU
745 * "OnlineNoCB": _rcu_barrier() found online no-CBs CPU.
746 * "OnlineQ": _rcu_barrier() found online CPU with callbacks.
747 * "OnlineNQ": _rcu_barrier() found online CPU, no callbacks.
748 * "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
749 * "IRQNQ": An rcu_barrier_callback() callback found no callbacks.
750 * "CB": An rcu_barrier_callback() invoked a callback, not the last.
751 * "LastCB": An rcu_barrier_callback() invoked the last callback.
752 * "Inc2": _rcu_barrier() piggyback check counter incremented.
753 * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
754 * is the count of remaining callbacks, and "done" is the piggybacking count.
756 TRACE_EVENT(rcu_barrier
,
758 TP_PROTO(const char *rcuname
, const char *s
, int cpu
, int cnt
, unsigned long done
),
760 TP_ARGS(rcuname
, s
, cpu
, cnt
, done
),
763 __field(const char *, rcuname
)
764 __field(const char *, s
)
767 __field(unsigned long, done
)
771 __entry
->rcuname
= rcuname
;
775 __entry
->done
= done
;
778 TP_printk("%s %s cpu %d remaining %d # %lu",
779 __entry
->rcuname
, __entry
->s
, __entry
->cpu
, __entry
->cnt
,
783 #else /* #ifdef CONFIG_RCU_TRACE */
785 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
786 #define trace_rcu_future_grace_period(rcuname, gpnum, completed, c, \
787 level, grplo, grphi, event) \
789 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
790 qsmask) do { } while (0)
791 #define trace_rcu_exp_grace_period(rcuname, gqseq, gpevent) \
793 #define trace_rcu_exp_funnel_lock(rcuname, level, grplo, grphi, gpevent) \
795 #define trace_rcu_nocb_wake(rcuname, cpu, reason) do { } while (0)
796 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
797 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
798 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
799 grplo, grphi, gp_tasks) do { } \
801 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
802 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
803 #define trace_rcu_prep_idle(reason) do { } while (0)
804 #define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
805 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
807 #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
809 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
810 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
811 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
813 #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
815 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
817 #endif /* #else #ifdef CONFIG_RCU_TRACE */
819 #endif /* _TRACE_RCU_H */
821 /* This part must be outside protection */
822 #include <trace/define_trace.h>