Branch data 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 [ - + - - : 3216150 : 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 [ - + - - : 1753418 : 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(unsigned long, gp_seq)
78 : : __field(const char *, gpevent)
79 : : ),
80 : :
81 : : TP_fast_assign(
82 : : __entry->rcuname = rcuname;
83 : : __entry->gp_seq = gp_seq;
84 : : __entry->gpevent = gpevent;
85 : : ),
86 : :
87 : : TP_printk("%s %lu %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 [ - + - - : 1162057 : 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(unsigned long, gp_seq)
118 : : __field(unsigned 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 = gp_seq;
128 : : __entry->gp_seq_req = 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 %lu %lu %u %d %d %s",
136 : : __entry->rcuname, __entry->gp_seq, __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 [ - + - - : 156329 : 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(unsigned 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 = gp_seq;
166 : : __entry->level = level;
167 : : __entry->grplo = grplo;
168 : : __entry->grphi = grphi;
169 : : __entry->qsmask = qsmask;
170 : : ),
171 : :
172 : : TP_printk("%s %lu %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 [ # # # # : 0 : 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(unsigned long, gpseq)
201 : : __field(const char *, gpevent)
202 : : ),
203 : :
204 : : TP_fast_assign(
205 : : __entry->rcuname = rcuname;
206 : : __entry->gpseq = gpseq;
207 : : __entry->gpevent = gpevent;
208 : : ),
209 : :
210 : : TP_printk("%s %lu %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 [ # # # # : 0 : 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(unsigned long, gp_seq)
320 : : __field(int, pid)
321 : : ),
322 : :
323 : : TP_fast_assign(
324 : : __entry->rcuname = rcuname;
325 : : __entry->gp_seq = gp_seq;
326 : : __entry->pid = pid;
327 : : ),
328 : :
329 : : TP_printk("%s %lu %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 [ # # # # : 0 : 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(unsigned long, gp_seq)
347 : : __field(int, pid)
348 : : ),
349 : :
350 : : TP_fast_assign(
351 : : __entry->rcuname = rcuname;
352 : : __entry->gp_seq = gp_seq;
353 : : __entry->pid = pid;
354 : : ),
355 : :
356 : : TP_printk("%s %lu %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 [ - + - - : 156249 : 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(unsigned 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 = 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 %lu %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 [ # # # # : 0 : 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(unsigned 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 = gp_seq;
426 : : __entry->cpu = cpu;
427 : : __entry->qsevent = qsevent;
428 : : ),
429 : :
430 : : TP_printk("%s %lu %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 a string
439 : : * as argument: "Start" for entering dyntick-idle mode, "Startirq" for
440 : : * entering it from irq/NMI, "End" for leaving it, "Endirq" for leaving it
441 : : * to irq/NMI, "--=" for events moving towards idle, and "++=" for events
442 : : * moving away from idle.
443 : : *
444 : : * These events also take a pair of numbers, which indicate the nesting
445 : : * depth before and after the event of interest, and a third number that is
446 : : * the ->dynticks counter. Note that task-related and interrupt-related
447 : : * events use two separate counters, and that the "++=" and "--=" events
448 : : * for irq/NMI will change the counter by two, otherwise by one.
449 : : */
450 [ - + - - : 825348 : TRACE_EVENT_RCU(rcu_dyntick,
- - - - ]
451 : :
452 : : TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
453 : :
454 : : TP_ARGS(polarity, oldnesting, newnesting, dynticks),
455 : :
456 : : TP_STRUCT__entry(
457 : : __field(const char *, polarity)
458 : : __field(long, oldnesting)
459 : : __field(long, newnesting)
460 : : __field(int, dynticks)
461 : : ),
462 : :
463 : : TP_fast_assign(
464 : : __entry->polarity = polarity;
465 : : __entry->oldnesting = oldnesting;
466 : : __entry->newnesting = newnesting;
467 : : __entry->dynticks = dynticks;
468 : : ),
469 : :
470 : : TP_printk("%s %lx %lx %#3x", __entry->polarity,
471 : : __entry->oldnesting, __entry->newnesting,
472 : : __entry->dynticks & 0xfff)
473 : : );
474 : :
475 : : /*
476 : : * Tracepoint for the registration of a single RCU callback function.
477 : : * The first argument is the type of RCU, the second argument is
478 : : * a pointer to the RCU callback itself, the third element is the
479 : : * number of lazy callbacks queued, and the fourth element is the
480 : : * total number of callbacks queued.
481 : : */
482 [ - + - - : 5714810 : TRACE_EVENT_RCU(rcu_callback,
- - - - ]
483 : :
484 : : TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen),
485 : :
486 : : TP_ARGS(rcuname, rhp, qlen),
487 : :
488 : : TP_STRUCT__entry(
489 : : __field(const char *, rcuname)
490 : : __field(void *, rhp)
491 : : __field(void *, func)
492 : : __field(long, qlen)
493 : : ),
494 : :
495 : : TP_fast_assign(
496 : : __entry->rcuname = rcuname;
497 : : __entry->rhp = rhp;
498 : : __entry->func = rhp->func;
499 : : __entry->qlen = qlen;
500 : : ),
501 : :
502 : : TP_printk("%s rhp=%p func=%ps %ld",
503 : : __entry->rcuname, __entry->rhp, __entry->func,
504 : : __entry->qlen)
505 : : );
506 : :
507 : : /*
508 : : * Tracepoint for the registration of a single RCU callback of the special
509 : : * kfree() form. The first argument is the RCU type, the second argument
510 : : * is a pointer to the RCU callback, the third argument is the offset
511 : : * of the callback within the enclosing RCU-protected data structure,
512 : : * the fourth argument is the number of lazy callbacks queued, and the
513 : : * fifth argument is the total number of callbacks queued.
514 : : */
515 [ # # # # : 0 : TRACE_EVENT_RCU(rcu_kfree_callback,
# # # # ]
516 : :
517 : : TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
518 : : long qlen),
519 : :
520 : : TP_ARGS(rcuname, rhp, offset, qlen),
521 : :
522 : : TP_STRUCT__entry(
523 : : __field(const char *, rcuname)
524 : : __field(void *, rhp)
525 : : __field(unsigned long, offset)
526 : : __field(long, qlen)
527 : : ),
528 : :
529 : : TP_fast_assign(
530 : : __entry->rcuname = rcuname;
531 : : __entry->rhp = rhp;
532 : : __entry->offset = offset;
533 : : __entry->qlen = qlen;
534 : : ),
535 : :
536 : : TP_printk("%s rhp=%p func=%ld %ld",
537 : : __entry->rcuname, __entry->rhp, __entry->offset,
538 : : __entry->qlen)
539 : : );
540 : :
541 : : /*
542 : : * Tracepoint for marking the beginning rcu_do_batch, performed to start
543 : : * RCU callback invocation. The first argument is the RCU flavor,
544 : : * the second is the number of lazy callbacks queued, the third is
545 : : * the total number of callbacks queued, and the fourth argument is
546 : : * the current RCU-callback batch limit.
547 : : */
548 [ - + - - : 610536 : TRACE_EVENT_RCU(rcu_batch_start,
- - - - ]
549 : :
550 : : TP_PROTO(const char *rcuname, long qlen, long blimit),
551 : :
552 : : TP_ARGS(rcuname, qlen, blimit),
553 : :
554 : : TP_STRUCT__entry(
555 : : __field(const char *, rcuname)
556 : : __field(long, qlen)
557 : : __field(long, blimit)
558 : : ),
559 : :
560 : : TP_fast_assign(
561 : : __entry->rcuname = rcuname;
562 : : __entry->qlen = qlen;
563 : : __entry->blimit = blimit;
564 : : ),
565 : :
566 : : TP_printk("%s CBs=%ld bl=%ld",
567 : : __entry->rcuname, __entry->qlen, __entry->blimit)
568 : : );
569 : :
570 : : /*
571 : : * Tracepoint for the invocation of a single RCU callback function.
572 : : * The first argument is the type of RCU, and the second argument is
573 : : * a pointer to the RCU callback itself.
574 : : */
575 [ - + - - : 5710406 : TRACE_EVENT_RCU(rcu_invoke_callback,
- - - - ]
576 : :
577 : : TP_PROTO(const char *rcuname, struct rcu_head *rhp),
578 : :
579 : : TP_ARGS(rcuname, rhp),
580 : :
581 : : TP_STRUCT__entry(
582 : : __field(const char *, rcuname)
583 : : __field(void *, rhp)
584 : : __field(void *, func)
585 : : ),
586 : :
587 : : TP_fast_assign(
588 : : __entry->rcuname = rcuname;
589 : : __entry->rhp = rhp;
590 : : __entry->func = rhp->func;
591 : : ),
592 : :
593 : : TP_printk("%s rhp=%p func=%ps",
594 : : __entry->rcuname, __entry->rhp, __entry->func)
595 : : );
596 : :
597 : : /*
598 : : * Tracepoint for the invocation of a single RCU callback of the special
599 : : * kfree() form. The first argument is the RCU flavor, the second
600 : : * argument is a pointer to the RCU callback, and the third argument
601 : : * is the offset of the callback within the enclosing RCU-protected
602 : : * data structure.
603 : : */
604 [ - + - - : 7361 : TRACE_EVENT_RCU(rcu_invoke_kfree_callback,
- - - - ]
605 : :
606 : : TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
607 : :
608 : : TP_ARGS(rcuname, rhp, offset),
609 : :
610 : : TP_STRUCT__entry(
611 : : __field(const char *, rcuname)
612 : : __field(void *, rhp)
613 : : __field(unsigned long, offset)
614 : : ),
615 : :
616 : : TP_fast_assign(
617 : : __entry->rcuname = rcuname;
618 : : __entry->rhp = rhp;
619 : : __entry->offset = offset;
620 : : ),
621 : :
622 : : TP_printk("%s rhp=%p func=%ld",
623 : : __entry->rcuname, __entry->rhp, __entry->offset)
624 : : );
625 : :
626 : : /*
627 : : * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
628 : : * invoked. The first argument is the name of the RCU flavor,
629 : : * the second argument is number of callbacks actually invoked,
630 : : * the third argument (cb) is whether or not any of the callbacks that
631 : : * were ready to invoke at the beginning of this batch are still
632 : : * queued, the fourth argument (nr) is the return value of need_resched(),
633 : : * the fifth argument (iit) is 1 if the current task is the idle task,
634 : : * and the sixth argument (risk) is the return value from
635 : : * rcu_is_callbacks_kthread().
636 : : */
637 [ - + - - : 610536 : TRACE_EVENT_RCU(rcu_batch_end,
- - - - #
# ]
638 : :
639 : : TP_PROTO(const char *rcuname, int callbacks_invoked,
640 : : char cb, char nr, char iit, char risk),
641 : :
642 : : TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
643 : :
644 : : TP_STRUCT__entry(
645 : : __field(const char *, rcuname)
646 : : __field(int, callbacks_invoked)
647 : : __field(char, cb)
648 : : __field(char, nr)
649 : : __field(char, iit)
650 : : __field(char, risk)
651 : : ),
652 : :
653 : : TP_fast_assign(
654 : : __entry->rcuname = rcuname;
655 : : __entry->callbacks_invoked = callbacks_invoked;
656 : : __entry->cb = cb;
657 : : __entry->nr = nr;
658 : : __entry->iit = iit;
659 : : __entry->risk = risk;
660 : : ),
661 : :
662 : : TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
663 : : __entry->rcuname, __entry->callbacks_invoked,
664 : : __entry->cb ? 'C' : '.',
665 : : __entry->nr ? 'S' : '.',
666 : : __entry->iit ? 'I' : '.',
667 : : __entry->risk ? 'R' : '.')
668 : : );
669 : :
670 : : /*
671 : : * Tracepoint for rcutorture readers. The first argument is the name
672 : : * of the RCU flavor from rcutorture's viewpoint and the second argument
673 : : * is the callback address. The third argument is the start time in
674 : : * seconds, and the last two arguments are the grace period numbers
675 : : * at the beginning and end of the read, respectively. Note that the
676 : : * callback address can be NULL.
677 : : */
678 : : #define RCUTORTURENAME_LEN 8
679 [ # # # # : 0 : TRACE_EVENT_RCU(rcu_torture_read,
# # # # ]
680 : :
681 : : TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
682 : : unsigned long secs, unsigned long c_old, unsigned long c),
683 : :
684 : : TP_ARGS(rcutorturename, rhp, secs, c_old, c),
685 : :
686 : : TP_STRUCT__entry(
687 : : __field(char, rcutorturename[RCUTORTURENAME_LEN])
688 : : __field(struct rcu_head *, rhp)
689 : : __field(unsigned long, secs)
690 : : __field(unsigned long, c_old)
691 : : __field(unsigned long, c)
692 : : ),
693 : :
694 : : TP_fast_assign(
695 : : strncpy(__entry->rcutorturename, rcutorturename,
696 : : RCUTORTURENAME_LEN);
697 : : __entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0;
698 : : __entry->rhp = rhp;
699 : : __entry->secs = secs;
700 : : __entry->c_old = c_old;
701 : : __entry->c = c;
702 : : ),
703 : :
704 : : TP_printk("%s torture read %p %luus c: %lu %lu",
705 : : __entry->rcutorturename, __entry->rhp,
706 : : __entry->secs, __entry->c_old, __entry->c)
707 : : );
708 : :
709 : : /*
710 : : * Tracepoint for rcu_barrier() execution. The string "s" describes
711 : : * the rcu_barrier phase:
712 : : * "Begin": rcu_barrier() started.
713 : : * "EarlyExit": rcu_barrier() piggybacked, thus early exit.
714 : : * "Inc1": rcu_barrier() piggyback check counter incremented.
715 : : * "OnlineQ": rcu_barrier() found online CPU with callbacks.
716 : : * "OnlineNQ": rcu_barrier() found online CPU, no callbacks.
717 : : * "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
718 : : * "IRQNQ": An rcu_barrier_callback() callback found no callbacks.
719 : : * "CB": An rcu_barrier_callback() invoked a callback, not the last.
720 : : * "LastCB": An rcu_barrier_callback() invoked the last callback.
721 : : * "Inc2": rcu_barrier() piggyback check counter incremented.
722 : : * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
723 : : * is the count of remaining callbacks, and "done" is the piggybacking count.
724 : : */
725 [ - + - - : 448 : TRACE_EVENT_RCU(rcu_barrier,
- - - - ]
726 : :
727 : : TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
728 : :
729 : : TP_ARGS(rcuname, s, cpu, cnt, done),
730 : :
731 : : TP_STRUCT__entry(
732 : : __field(const char *, rcuname)
733 : : __field(const char *, s)
734 : : __field(int, cpu)
735 : : __field(int, cnt)
736 : : __field(unsigned long, done)
737 : : ),
738 : :
739 : : TP_fast_assign(
740 : : __entry->rcuname = rcuname;
741 : : __entry->s = s;
742 : : __entry->cpu = cpu;
743 : : __entry->cnt = cnt;
744 : : __entry->done = done;
745 : : ),
746 : :
747 : : TP_printk("%s %s cpu %d remaining %d # %lu",
748 : : __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt,
749 : : __entry->done)
750 : : );
751 : :
752 : : #endif /* _TRACE_RCU_H */
753 : :
754 : : /* This part must be outside protection */
755 : : #include <trace/define_trace.h>
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