Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : #undef TRACE_SYSTEM
3 : #define TRACE_SYSTEM rcu
4 :
5 : #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
6 : #define _TRACE_RCU_H
7 :
8 : #include <linux/tracepoint.h>
9 :
10 : #ifdef CONFIG_RCU_TRACE
11 : #define TRACE_EVENT_RCU TRACE_EVENT
12 : #else
13 : #define TRACE_EVENT_RCU TRACE_EVENT_NOP
14 : #endif
15 :
16 : /*
17 : * Tracepoint for start/end markers used for utilization calculations.
18 : * By convention, the string is of the following forms:
19 : *
20 : * "Start <activity>" -- Mark the start of the specified activity,
21 : * such as "context switch". Nesting is permitted.
22 : * "End <activity>" -- Mark the end of the specified activity.
23 : *
24 : * An "@" character within "<activity>" is a comment character: Data
25 : * reduction scripts will ignore the "@" and the remainder of the line.
26 : */
27 446276 : TRACE_EVENT(rcu_utilization,
28 :
29 : TP_PROTO(const char *s),
30 :
31 : TP_ARGS(s),
32 :
33 : TP_STRUCT__entry(
34 : __field(const char *, s)
35 : ),
36 :
37 : TP_fast_assign(
38 : __entry->s = s;
39 : ),
40 :
41 : TP_printk("%s", __entry->s)
42 : );
43 :
44 : #if defined(CONFIG_TREE_RCU)
45 :
46 : /*
47 : * Tracepoint for grace-period events. Takes a string identifying the
48 : * RCU flavor, the grace-period number, and a string identifying the
49 : * grace-period-related event as follows:
50 : *
51 : * "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL.
52 : * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL.
53 : * "newreq": Request a new grace period.
54 : * "start": Start a grace period.
55 : * "cpustart": CPU first notices a grace-period start.
56 : * "cpuqs": CPU passes through a quiescent state.
57 : * "cpuonl": CPU comes online.
58 : * "cpuofl": CPU goes offline.
59 : * "cpuofl-bgp": CPU goes offline while blocking a grace period.
60 : * "reqwait": GP kthread sleeps waiting for grace-period request.
61 : * "reqwaitsig": GP kthread awakened by signal from reqwait state.
62 : * "fqswait": GP kthread waiting until time to force quiescent states.
63 : * "fqsstart": GP kthread starts forcing quiescent states.
64 : * "fqsend": GP kthread done forcing quiescent states.
65 : * "fqswaitsig": GP kthread awakened by signal from fqswait state.
66 : * "end": End a grace period.
67 : * "cpuend": CPU first notices a grace-period end.
68 : */
69 57057 : TRACE_EVENT_RCU(rcu_grace_period,
70 :
71 : TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent),
72 :
73 : TP_ARGS(rcuname, gp_seq, gpevent),
74 :
75 : TP_STRUCT__entry(
76 : __field(const char *, rcuname)
77 : __field(long, gp_seq)
78 : __field(const char *, gpevent)
79 : ),
80 :
81 : TP_fast_assign(
82 : __entry->rcuname = rcuname;
83 : __entry->gp_seq = (long)gp_seq;
84 : __entry->gpevent = gpevent;
85 : ),
86 :
87 : TP_printk("%s %ld %s",
88 : __entry->rcuname, __entry->gp_seq, __entry->gpevent)
89 : );
90 :
91 : /*
92 : * Tracepoint for future grace-period events. The caller should pull
93 : * the data from the rcu_node structure, other than rcuname, which comes
94 : * from the rcu_state structure, and event, which is one of the following:
95 : *
96 : * "Cleanup": Clean up rcu_node structure after previous GP.
97 : * "CleanupMore": Clean up, and another GP is needed.
98 : * "EndWait": Complete wait.
99 : * "NoGPkthread": The RCU grace-period kthread has not yet started.
100 : * "Prestarted": Someone beat us to the request
101 : * "Startedleaf": Leaf node marked for future GP.
102 : * "Startedleafroot": All nodes from leaf to root marked for future GP.
103 : * "Startedroot": Requested a nocb grace period based on root-node data.
104 : * "Startleaf": Request a grace period based on leaf-node data.
105 : * "StartWait": Start waiting for the requested grace period.
106 : */
107 26647 : TRACE_EVENT_RCU(rcu_future_grace_period,
108 :
109 : TP_PROTO(const char *rcuname, unsigned long gp_seq,
110 : unsigned long gp_seq_req, u8 level, int grplo, int grphi,
111 : const char *gpevent),
112 :
113 : TP_ARGS(rcuname, gp_seq, gp_seq_req, level, grplo, grphi, gpevent),
114 :
115 : TP_STRUCT__entry(
116 : __field(const char *, rcuname)
117 : __field(long, gp_seq)
118 : __field(long, gp_seq_req)
119 : __field(u8, level)
120 : __field(int, grplo)
121 : __field(int, grphi)
122 : __field(const char *, gpevent)
123 : ),
124 :
125 : TP_fast_assign(
126 : __entry->rcuname = rcuname;
127 : __entry->gp_seq = (long)gp_seq;
128 : __entry->gp_seq_req = (long)gp_seq_req;
129 : __entry->level = level;
130 : __entry->grplo = grplo;
131 : __entry->grphi = grphi;
132 : __entry->gpevent = gpevent;
133 : ),
134 :
135 : TP_printk("%s %ld %ld %u %d %d %s",
136 : __entry->rcuname, (long)__entry->gp_seq, (long)__entry->gp_seq_req, __entry->level,
137 : __entry->grplo, __entry->grphi, __entry->gpevent)
138 : );
139 :
140 : /*
141 : * Tracepoint for grace-period-initialization events. These are
142 : * distinguished by the type of RCU, the new grace-period number, the
143 : * rcu_node structure level, the starting and ending CPU covered by the
144 : * rcu_node structure, and the mask of CPUs that will be waited for.
145 : * All but the type of RCU are extracted from the rcu_node structure.
146 : */
147 2020 : TRACE_EVENT_RCU(rcu_grace_period_init,
148 :
149 : TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level,
150 : int grplo, int grphi, unsigned long qsmask),
151 :
152 : TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask),
153 :
154 : TP_STRUCT__entry(
155 : __field(const char *, rcuname)
156 : __field(long, gp_seq)
157 : __field(u8, level)
158 : __field(int, grplo)
159 : __field(int, grphi)
160 : __field(unsigned long, qsmask)
161 : ),
162 :
163 : TP_fast_assign(
164 : __entry->rcuname = rcuname;
165 : __entry->gp_seq = (long)gp_seq;
166 : __entry->level = level;
167 : __entry->grplo = grplo;
168 : __entry->grphi = grphi;
169 : __entry->qsmask = qsmask;
170 : ),
171 :
172 : TP_printk("%s %ld %u %d %d %lx",
173 : __entry->rcuname, __entry->gp_seq, __entry->level,
174 : __entry->grplo, __entry->grphi, __entry->qsmask)
175 : );
176 :
177 : /*
178 : * Tracepoint for expedited grace-period events. Takes a string identifying
179 : * the RCU flavor, the expedited grace-period sequence number, and a string
180 : * identifying the grace-period-related event as follows:
181 : *
182 : * "snap": Captured snapshot of expedited grace period sequence number.
183 : * "start": Started a real expedited grace period.
184 : * "reset": Started resetting the tree
185 : * "select": Started selecting the CPUs to wait on.
186 : * "selectofl": Selected CPU partially offline.
187 : * "startwait": Started waiting on selected CPUs.
188 : * "end": Ended a real expedited grace period.
189 : * "endwake": Woke piggybackers up.
190 : * "done": Someone else did the expedited grace period for us.
191 : */
192 1127 : TRACE_EVENT_RCU(rcu_exp_grace_period,
193 :
194 : TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent),
195 :
196 : TP_ARGS(rcuname, gpseq, gpevent),
197 :
198 : TP_STRUCT__entry(
199 : __field(const char *, rcuname)
200 : __field(long, gpseq)
201 : __field(const char *, gpevent)
202 : ),
203 :
204 : TP_fast_assign(
205 : __entry->rcuname = rcuname;
206 : __entry->gpseq = (long)gpseq;
207 : __entry->gpevent = gpevent;
208 : ),
209 :
210 : TP_printk("%s %ld %s",
211 : __entry->rcuname, __entry->gpseq, __entry->gpevent)
212 : );
213 :
214 : /*
215 : * Tracepoint for expedited grace-period funnel-locking events. Takes a
216 : * string identifying the RCU flavor, an integer identifying the rcu_node
217 : * combining-tree level, another pair of integers identifying the lowest-
218 : * and highest-numbered CPU associated with the current rcu_node structure,
219 : * and a string. identifying the grace-period-related event as follows:
220 : *
221 : * "nxtlvl": Advance to next level of rcu_node funnel
222 : * "wait": Wait for someone else to do expedited GP
223 : */
224 0 : TRACE_EVENT_RCU(rcu_exp_funnel_lock,
225 :
226 : TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi,
227 : const char *gpevent),
228 :
229 : TP_ARGS(rcuname, level, grplo, grphi, gpevent),
230 :
231 : TP_STRUCT__entry(
232 : __field(const char *, rcuname)
233 : __field(u8, level)
234 : __field(int, grplo)
235 : __field(int, grphi)
236 : __field(const char *, gpevent)
237 : ),
238 :
239 : TP_fast_assign(
240 : __entry->rcuname = rcuname;
241 : __entry->level = level;
242 : __entry->grplo = grplo;
243 : __entry->grphi = grphi;
244 : __entry->gpevent = gpevent;
245 : ),
246 :
247 : TP_printk("%s %d %d %d %s",
248 : __entry->rcuname, __entry->level, __entry->grplo,
249 : __entry->grphi, __entry->gpevent)
250 : );
251 :
252 : #ifdef CONFIG_RCU_NOCB_CPU
253 : /*
254 : * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
255 : * to assist debugging of these handoffs.
256 : *
257 : * The first argument is the name of the RCU flavor, and the second is
258 : * the number of the offloaded CPU are extracted. The third and final
259 : * argument is a string as follows:
260 : *
261 : * "AlreadyAwake": The to-be-awakened rcuo kthread is already awake.
262 : * "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass.
263 : * "CBSleep": rcuo CB kthread sleeping waiting for CBs.
264 : * "Check": rcuo GP kthread checking specified CPU for work.
265 : * "DeferredWake": Timer expired or polled check, time to wake.
266 : * "DoWake": The to-be-awakened rcuo kthread needs to be awakened.
267 : * "EndSleep": Done waiting for GP for !rcu_nocb_poll.
268 : * "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty).
269 : * "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened.
270 : * "FirstBQwake": FirstBQ plus rcuo kthread must be awakened.
271 : * "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty).
272 : * "NeedWaitGP": rcuo GP kthread must wait on a grace period.
273 : * "Poll": Start of new polling cycle for rcu_nocb_poll.
274 : * "Sleep": Sleep waiting for GP for !rcu_nocb_poll.
275 : * "Timer": Deferred-wake timer expired.
276 : * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
277 : * "WakeEmpty": Wake rcuo kthread, first CB to empty list.
278 : * "WakeNot": Don't wake rcuo kthread.
279 : * "WakeNotPoll": Don't wake rcuo kthread because it is polling.
280 : * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
281 : * "WokeEmpty": rcuo CB kthread woke to find empty list.
282 : */
283 : TRACE_EVENT_RCU(rcu_nocb_wake,
284 :
285 : TP_PROTO(const char *rcuname, int cpu, const char *reason),
286 :
287 : TP_ARGS(rcuname, cpu, reason),
288 :
289 : TP_STRUCT__entry(
290 : __field(const char *, rcuname)
291 : __field(int, cpu)
292 : __field(const char *, reason)
293 : ),
294 :
295 : TP_fast_assign(
296 : __entry->rcuname = rcuname;
297 : __entry->cpu = cpu;
298 : __entry->reason = reason;
299 : ),
300 :
301 : TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason)
302 : );
303 : #endif
304 :
305 : /*
306 : * Tracepoint for tasks blocking within preemptible-RCU read-side
307 : * critical sections. Track the type of RCU (which one day might
308 : * include SRCU), the grace-period number that the task is blocking
309 : * (the current or the next), and the task's PID.
310 : */
311 : TRACE_EVENT_RCU(rcu_preempt_task,
312 :
313 : TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq),
314 :
315 : TP_ARGS(rcuname, pid, gp_seq),
316 :
317 : TP_STRUCT__entry(
318 : __field(const char *, rcuname)
319 : __field(long, gp_seq)
320 : __field(int, pid)
321 : ),
322 :
323 : TP_fast_assign(
324 : __entry->rcuname = rcuname;
325 : __entry->gp_seq = (long)gp_seq;
326 : __entry->pid = pid;
327 : ),
328 :
329 : TP_printk("%s %ld %d",
330 : __entry->rcuname, __entry->gp_seq, __entry->pid)
331 : );
332 :
333 : /*
334 : * Tracepoint for tasks that blocked within a given preemptible-RCU
335 : * read-side critical section exiting that critical section. Track the
336 : * type of RCU (which one day might include SRCU) and the task's PID.
337 : */
338 : TRACE_EVENT_RCU(rcu_unlock_preempted_task,
339 :
340 : TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid),
341 :
342 : TP_ARGS(rcuname, gp_seq, pid),
343 :
344 : TP_STRUCT__entry(
345 : __field(const char *, rcuname)
346 : __field(long, gp_seq)
347 : __field(int, pid)
348 : ),
349 :
350 : TP_fast_assign(
351 : __entry->rcuname = rcuname;
352 : __entry->gp_seq = (long)gp_seq;
353 : __entry->pid = pid;
354 : ),
355 :
356 : TP_printk("%s %ld %d", __entry->rcuname, __entry->gp_seq, __entry->pid)
357 : );
358 :
359 : /*
360 : * Tracepoint for quiescent-state-reporting events. These are
361 : * distinguished by the type of RCU, the grace-period number, the
362 : * mask of quiescent lower-level entities, the rcu_node structure level,
363 : * the starting and ending CPU covered by the rcu_node structure, and
364 : * whether there are any blocked tasks blocking the current grace period.
365 : * All but the type of RCU are extracted from the rcu_node structure.
366 : */
367 7937 : TRACE_EVENT_RCU(rcu_quiescent_state_report,
368 :
369 : TP_PROTO(const char *rcuname, unsigned long gp_seq,
370 : unsigned long mask, unsigned long qsmask,
371 : u8 level, int grplo, int grphi, int gp_tasks),
372 :
373 : TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks),
374 :
375 : TP_STRUCT__entry(
376 : __field(const char *, rcuname)
377 : __field(long, gp_seq)
378 : __field(unsigned long, mask)
379 : __field(unsigned long, qsmask)
380 : __field(u8, level)
381 : __field(int, grplo)
382 : __field(int, grphi)
383 : __field(u8, gp_tasks)
384 : ),
385 :
386 : TP_fast_assign(
387 : __entry->rcuname = rcuname;
388 : __entry->gp_seq = (long)gp_seq;
389 : __entry->mask = mask;
390 : __entry->qsmask = qsmask;
391 : __entry->level = level;
392 : __entry->grplo = grplo;
393 : __entry->grphi = grphi;
394 : __entry->gp_tasks = gp_tasks;
395 : ),
396 :
397 : TP_printk("%s %ld %lx>%lx %u %d %d %u",
398 : __entry->rcuname, __entry->gp_seq,
399 : __entry->mask, __entry->qsmask, __entry->level,
400 : __entry->grplo, __entry->grphi, __entry->gp_tasks)
401 : );
402 :
403 : /*
404 : * Tracepoint for quiescent states detected by force_quiescent_state().
405 : * These trace events include the type of RCU, the grace-period number
406 : * that was blocked by the CPU, the CPU itself, and the type of quiescent
407 : * state, which can be "dti" for dyntick-idle mode or "kick" when kicking
408 : * a CPU that has been in dyntick-idle mode for too long.
409 : */
410 757 : TRACE_EVENT_RCU(rcu_fqs,
411 :
412 : TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent),
413 :
414 : TP_ARGS(rcuname, gp_seq, cpu, qsevent),
415 :
416 : TP_STRUCT__entry(
417 : __field(const char *, rcuname)
418 : __field(long, gp_seq)
419 : __field(int, cpu)
420 : __field(const char *, qsevent)
421 : ),
422 :
423 : TP_fast_assign(
424 : __entry->rcuname = rcuname;
425 : __entry->gp_seq = (long)gp_seq;
426 : __entry->cpu = cpu;
427 : __entry->qsevent = qsevent;
428 : ),
429 :
430 : TP_printk("%s %ld %d %s",
431 : __entry->rcuname, __entry->gp_seq,
432 : __entry->cpu, __entry->qsevent)
433 : );
434 :
435 : #endif /* #if defined(CONFIG_TREE_RCU) */
436 :
437 : /*
438 : * Tracepoint for dyntick-idle entry/exit events. These take 2 strings
439 : * as argument:
440 : * polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not
441 : * being in dyntick-idle mode.
442 : * context: "USER" or "IDLE" or "IRQ".
443 : * NMIs nested in IRQs are inferred with dynticks_nesting > 1 in IRQ context.
444 : *
445 : * These events also take a pair of numbers, which indicate the nesting
446 : * depth before and after the event of interest, and a third number that is
447 : * the ->dynticks counter. Note that task-related and interrupt-related
448 : * events use two separate counters, and that the "++=" and "--=" events
449 : * for irq/NMI will change the counter by two, otherwise by one.
450 : */
451 : TRACE_EVENT_RCU(rcu_dyntick,
452 :
453 : TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
454 :
455 : TP_ARGS(polarity, oldnesting, newnesting, dynticks),
456 :
457 : TP_STRUCT__entry(
458 : __field(const char *, polarity)
459 : __field(long, oldnesting)
460 : __field(long, newnesting)
461 : __field(int, dynticks)
462 : ),
463 :
464 : TP_fast_assign(
465 : __entry->polarity = polarity;
466 : __entry->oldnesting = oldnesting;
467 : __entry->newnesting = newnesting;
468 : __entry->dynticks = dynticks;
469 : ),
470 :
471 : TP_printk("%s %lx %lx %#3x", __entry->polarity,
472 : __entry->oldnesting, __entry->newnesting,
473 : __entry->dynticks & 0xfff)
474 : );
475 :
476 : /*
477 : * Tracepoint for the registration of a single RCU callback function.
478 : * The first argument is the type of RCU, the second argument is
479 : * a pointer to the RCU callback itself, the third element is the
480 : * number of lazy callbacks queued, and the fourth element is the
481 : * total number of callbacks queued.
482 : */
483 627279 : TRACE_EVENT_RCU(rcu_callback,
484 :
485 : TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen),
486 :
487 : TP_ARGS(rcuname, rhp, qlen),
488 :
489 : TP_STRUCT__entry(
490 : __field(const char *, rcuname)
491 : __field(void *, rhp)
492 : __field(void *, func)
493 : __field(long, qlen)
494 : ),
495 :
496 : TP_fast_assign(
497 : __entry->rcuname = rcuname;
498 : __entry->rhp = rhp;
499 : __entry->func = rhp->func;
500 : __entry->qlen = qlen;
501 : ),
502 :
503 : TP_printk("%s rhp=%p func=%ps %ld",
504 : __entry->rcuname, __entry->rhp, __entry->func,
505 : __entry->qlen)
506 : );
507 :
508 692592 : TRACE_EVENT_RCU(rcu_segcb_stats,
509 :
510 : TP_PROTO(struct rcu_segcblist *rs, const char *ctx),
511 :
512 : TP_ARGS(rs, ctx),
513 :
514 : TP_STRUCT__entry(
515 : __field(const char *, ctx)
516 : __array(unsigned long, gp_seq, RCU_CBLIST_NSEGS)
517 : __array(long, seglen, RCU_CBLIST_NSEGS)
518 : ),
519 :
520 : TP_fast_assign(
521 : __entry->ctx = ctx;
522 : memcpy(__entry->seglen, rs->seglen, RCU_CBLIST_NSEGS * sizeof(long));
523 : memcpy(__entry->gp_seq, rs->gp_seq, RCU_CBLIST_NSEGS * sizeof(unsigned long));
524 :
525 : ),
526 :
527 : TP_printk("%s seglen: (DONE=%ld, WAIT=%ld, NEXT_READY=%ld, NEXT=%ld) "
528 : "gp_seq: (DONE=%lu, WAIT=%lu, NEXT_READY=%lu, NEXT=%lu)", __entry->ctx,
529 : __entry->seglen[0], __entry->seglen[1], __entry->seglen[2], __entry->seglen[3],
530 : __entry->gp_seq[0], __entry->gp_seq[1], __entry->gp_seq[2], __entry->gp_seq[3])
531 :
532 : );
533 :
534 : /*
535 : * Tracepoint for the registration of a single RCU callback of the special
536 : * kvfree() 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 0 : TRACE_EVENT_RCU(rcu_kvfree_callback,
543 :
544 : TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
545 : long qlen),
546 :
547 : TP_ARGS(rcuname, rhp, offset, qlen),
548 :
549 : TP_STRUCT__entry(
550 : __field(const char *, rcuname)
551 : __field(void *, rhp)
552 : __field(unsigned long, offset)
553 : __field(long, qlen)
554 : ),
555 :
556 : TP_fast_assign(
557 : __entry->rcuname = rcuname;
558 : __entry->rhp = rhp;
559 : __entry->offset = offset;
560 : __entry->qlen = qlen;
561 : ),
562 :
563 : TP_printk("%s rhp=%p func=%ld %ld",
564 : __entry->rcuname, __entry->rhp, __entry->offset,
565 : __entry->qlen)
566 : );
567 :
568 : /*
569 : * Tracepoint for marking the beginning rcu_do_batch, performed to start
570 : * RCU callback invocation. The first argument is the RCU flavor,
571 : * the second is the number of lazy callbacks queued, the third is
572 : * the total number of callbacks queued, and the fourth argument is
573 : * the current RCU-callback batch limit.
574 : */
575 48776 : TRACE_EVENT_RCU(rcu_batch_start,
576 :
577 : TP_PROTO(const char *rcuname, long qlen, long blimit),
578 :
579 : TP_ARGS(rcuname, qlen, blimit),
580 :
581 : TP_STRUCT__entry(
582 : __field(const char *, rcuname)
583 : __field(long, qlen)
584 : __field(long, blimit)
585 : ),
586 :
587 : TP_fast_assign(
588 : __entry->rcuname = rcuname;
589 : __entry->qlen = qlen;
590 : __entry->blimit = blimit;
591 : ),
592 :
593 : TP_printk("%s CBs=%ld bl=%ld",
594 : __entry->rcuname, __entry->qlen, __entry->blimit)
595 : );
596 :
597 : /*
598 : * Tracepoint for the invocation of a single RCU callback function.
599 : * The first argument is the type of RCU, and the second argument is
600 : * a pointer to the RCU callback itself.
601 : */
602 624982 : TRACE_EVENT_RCU(rcu_invoke_callback,
603 :
604 : TP_PROTO(const char *rcuname, struct rcu_head *rhp),
605 :
606 : TP_ARGS(rcuname, rhp),
607 :
608 : TP_STRUCT__entry(
609 : __field(const char *, rcuname)
610 : __field(void *, rhp)
611 : __field(void *, func)
612 : ),
613 :
614 : TP_fast_assign(
615 : __entry->rcuname = rcuname;
616 : __entry->rhp = rhp;
617 : __entry->func = rhp->func;
618 : ),
619 :
620 : TP_printk("%s rhp=%p func=%ps",
621 : __entry->rcuname, __entry->rhp, __entry->func)
622 : );
623 :
624 : /*
625 : * Tracepoint for the invocation of a single RCU callback of the special
626 : * kvfree() form. The first argument is the RCU flavor, the second
627 : * argument is a pointer to the RCU callback, and the third argument
628 : * is the offset of the callback within the enclosing RCU-protected
629 : * data structure.
630 : */
631 4 : TRACE_EVENT_RCU(rcu_invoke_kvfree_callback,
632 :
633 : TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
634 :
635 : TP_ARGS(rcuname, rhp, offset),
636 :
637 : TP_STRUCT__entry(
638 : __field(const char *, rcuname)
639 : __field(void *, rhp)
640 : __field(unsigned long, offset)
641 : ),
642 :
643 : TP_fast_assign(
644 : __entry->rcuname = rcuname;
645 : __entry->rhp = rhp;
646 : __entry->offset = offset;
647 : ),
648 :
649 : TP_printk("%s rhp=%p func=%ld",
650 : __entry->rcuname, __entry->rhp, __entry->offset)
651 : );
652 :
653 : /*
654 : * Tracepoint for the invocation of a single RCU callback of the special
655 : * kfree_bulk() form. The first argument is the RCU flavor, the second
656 : * argument is a number of elements in array to free, the third is an
657 : * address of the array holding nr_records entries.
658 : */
659 141 : TRACE_EVENT_RCU(rcu_invoke_kfree_bulk_callback,
660 :
661 : TP_PROTO(const char *rcuname, unsigned long nr_records, void **p),
662 :
663 : TP_ARGS(rcuname, nr_records, p),
664 :
665 : TP_STRUCT__entry(
666 : __field(const char *, rcuname)
667 : __field(unsigned long, nr_records)
668 : __field(void **, p)
669 : ),
670 :
671 : TP_fast_assign(
672 : __entry->rcuname = rcuname;
673 : __entry->nr_records = nr_records;
674 : __entry->p = p;
675 : ),
676 :
677 : TP_printk("%s bulk=0x%p nr_records=%lu",
678 : __entry->rcuname, __entry->p, __entry->nr_records)
679 : );
680 :
681 : /*
682 : * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
683 : * invoked. The first argument is the name of the RCU flavor,
684 : * the second argument is number of callbacks actually invoked,
685 : * the third argument (cb) is whether or not any of the callbacks that
686 : * were ready to invoke at the beginning of this batch are still
687 : * queued, the fourth argument (nr) is the return value of need_resched(),
688 : * the fifth argument (iit) is 1 if the current task is the idle task,
689 : * and the sixth argument (risk) is the return value from
690 : * rcu_is_callbacks_kthread().
691 : */
692 48772 : TRACE_EVENT_RCU(rcu_batch_end,
693 :
694 : TP_PROTO(const char *rcuname, int callbacks_invoked,
695 : char cb, char nr, char iit, char risk),
696 :
697 : TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
698 :
699 : TP_STRUCT__entry(
700 : __field(const char *, rcuname)
701 : __field(int, callbacks_invoked)
702 : __field(char, cb)
703 : __field(char, nr)
704 : __field(char, iit)
705 : __field(char, risk)
706 : ),
707 :
708 : TP_fast_assign(
709 : __entry->rcuname = rcuname;
710 : __entry->callbacks_invoked = callbacks_invoked;
711 : __entry->cb = cb;
712 : __entry->nr = nr;
713 : __entry->iit = iit;
714 : __entry->risk = risk;
715 : ),
716 :
717 : TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
718 : __entry->rcuname, __entry->callbacks_invoked,
719 : __entry->cb ? 'C' : '.',
720 : __entry->nr ? 'S' : '.',
721 : __entry->iit ? 'I' : '.',
722 : __entry->risk ? 'R' : '.')
723 : );
724 :
725 : /*
726 : * Tracepoint for rcutorture readers. The first argument is the name
727 : * of the RCU flavor from rcutorture's viewpoint and the second argument
728 : * is the callback address. The third argument is the start time in
729 : * seconds, and the last two arguments are the grace period numbers
730 : * at the beginning and end of the read, respectively. Note that the
731 : * callback address can be NULL.
732 : */
733 : #define RCUTORTURENAME_LEN 8
734 0 : TRACE_EVENT_RCU(rcu_torture_read,
735 :
736 : TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
737 : unsigned long secs, unsigned long c_old, unsigned long c),
738 :
739 : TP_ARGS(rcutorturename, rhp, secs, c_old, c),
740 :
741 : TP_STRUCT__entry(
742 : __field(char, rcutorturename[RCUTORTURENAME_LEN])
743 : __field(struct rcu_head *, rhp)
744 : __field(unsigned long, secs)
745 : __field(unsigned long, c_old)
746 : __field(unsigned long, c)
747 : ),
748 :
749 : TP_fast_assign(
750 : strncpy(__entry->rcutorturename, rcutorturename,
751 : RCUTORTURENAME_LEN);
752 : __entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0;
753 : __entry->rhp = rhp;
754 : __entry->secs = secs;
755 : __entry->c_old = c_old;
756 : __entry->c = c;
757 : ),
758 :
759 : TP_printk("%s torture read %p %luus c: %lu %lu",
760 : __entry->rcutorturename, __entry->rhp,
761 : __entry->secs, __entry->c_old, __entry->c)
762 : );
763 :
764 : /*
765 : * Tracepoint for rcu_barrier() execution. The string "s" describes
766 : * the rcu_barrier phase:
767 : * "Begin": rcu_barrier() started.
768 : * "EarlyExit": rcu_barrier() piggybacked, thus early exit.
769 : * "Inc1": rcu_barrier() piggyback check counter incremented.
770 : * "OfflineNoCBQ": rcu_barrier() found offline no-CBs CPU with callbacks.
771 : * "OnlineQ": rcu_barrier() found online CPU with callbacks.
772 : * "OnlineNQ": rcu_barrier() found online CPU, no callbacks.
773 : * "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
774 : * "IRQNQ": An rcu_barrier_callback() callback found no callbacks.
775 : * "CB": An rcu_barrier_callback() invoked a callback, not the last.
776 : * "LastCB": An rcu_barrier_callback() invoked the last callback.
777 : * "Inc2": rcu_barrier() piggyback check counter incremented.
778 : * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
779 : * is the count of remaining callbacks, and "done" is the piggybacking count.
780 : */
781 11 : TRACE_EVENT_RCU(rcu_barrier,
782 :
783 : TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
784 :
785 : TP_ARGS(rcuname, s, cpu, cnt, done),
786 :
787 : TP_STRUCT__entry(
788 : __field(const char *, rcuname)
789 : __field(const char *, s)
790 : __field(int, cpu)
791 : __field(int, cnt)
792 : __field(unsigned long, done)
793 : ),
794 :
795 : TP_fast_assign(
796 : __entry->rcuname = rcuname;
797 : __entry->s = s;
798 : __entry->cpu = cpu;
799 : __entry->cnt = cnt;
800 : __entry->done = done;
801 : ),
802 :
803 : TP_printk("%s %s cpu %d remaining %d # %lu",
804 : __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt,
805 : __entry->done)
806 : );
807 :
808 : #endif /* _TRACE_RCU_H */
809 :
810 : /* This part must be outside protection */
811 : #include <trace/define_trace.h>
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