Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
29c00b4a PM |
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 | /* | |
300df91c PM |
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. | |
385680a9 PM |
17 | * |
18 | * An "@" character within "<activity>" is a comment character: Data | |
19 | * reduction scripts will ignore the "@" and the remainder of the line. | |
300df91c PM |
20 | */ |
21 | TRACE_EVENT(rcu_utilization, | |
22 | ||
e66c33d5 | 23 | TP_PROTO(const char *s), |
300df91c PM |
24 | |
25 | TP_ARGS(s), | |
26 | ||
27 | TP_STRUCT__entry( | |
e66c33d5 | 28 | __field(const char *, s) |
300df91c PM |
29 | ), |
30 | ||
31 | TP_fast_assign( | |
32 | __entry->s = s; | |
33 | ), | |
34 | ||
35 | TP_printk("%s", __entry->s) | |
36 | ); | |
37 | ||
d4c08f2a PM |
38 | #ifdef CONFIG_RCU_TRACE |
39 | ||
28f6569a | 40 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) |
d4c08f2a PM |
41 | |
42 | /* | |
63c4db78 PM |
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: | |
46 | * | |
47 | * "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL. | |
48 | * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL. | |
bb311ecc | 49 | * "newreq": Request a new grace period. |
63c4db78 PM |
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. | |
d4c08f2a PM |
63 | */ |
64 | TRACE_EVENT(rcu_grace_period, | |
65 | ||
e66c33d5 | 66 | TP_PROTO(const char *rcuname, unsigned long gpnum, const char *gpevent), |
d4c08f2a PM |
67 | |
68 | TP_ARGS(rcuname, gpnum, gpevent), | |
69 | ||
70 | TP_STRUCT__entry( | |
e66c33d5 | 71 | __field(const char *, rcuname) |
d4c08f2a | 72 | __field(unsigned long, gpnum) |
e66c33d5 | 73 | __field(const char *, gpevent) |
d4c08f2a PM |
74 | ), |
75 | ||
76 | TP_fast_assign( | |
77 | __entry->rcuname = rcuname; | |
78 | __entry->gpnum = gpnum; | |
79 | __entry->gpevent = gpevent; | |
80 | ), | |
81 | ||
82 | TP_printk("%s %lu %s", | |
83 | __entry->rcuname, __entry->gpnum, __entry->gpevent) | |
84 | ); | |
85 | ||
09c7b890 | 86 | /* |
bd9f0686 PM |
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: | |
09c7b890 PM |
91 | * |
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. | |
101 | */ | |
bd9f0686 | 102 | TRACE_EVENT(rcu_future_grace_period, |
09c7b890 | 103 | |
e66c33d5 | 104 | TP_PROTO(const char *rcuname, unsigned long gpnum, unsigned long completed, |
09c7b890 | 105 | unsigned long c, u8 level, int grplo, int grphi, |
e66c33d5 | 106 | const char *gpevent), |
09c7b890 PM |
107 | |
108 | TP_ARGS(rcuname, gpnum, completed, c, level, grplo, grphi, gpevent), | |
109 | ||
110 | TP_STRUCT__entry( | |
e66c33d5 | 111 | __field(const char *, rcuname) |
09c7b890 PM |
112 | __field(unsigned long, gpnum) |
113 | __field(unsigned long, completed) | |
114 | __field(unsigned long, c) | |
115 | __field(u8, level) | |
116 | __field(int, grplo) | |
117 | __field(int, grphi) | |
e66c33d5 | 118 | __field(const char *, gpevent) |
09c7b890 PM |
119 | ), |
120 | ||
121 | TP_fast_assign( | |
122 | __entry->rcuname = rcuname; | |
123 | __entry->gpnum = gpnum; | |
124 | __entry->completed = completed; | |
125 | __entry->c = c; | |
126 | __entry->level = level; | |
127 | __entry->grplo = grplo; | |
128 | __entry->grphi = grphi; | |
129 | __entry->gpevent = gpevent; | |
130 | ), | |
131 | ||
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, | |
135 | __entry->gpevent) | |
136 | ); | |
137 | ||
d4c08f2a PM |
138 | /* |
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. | |
144 | */ | |
145 | TRACE_EVENT(rcu_grace_period_init, | |
146 | ||
e66c33d5 | 147 | TP_PROTO(const char *rcuname, unsigned long gpnum, u8 level, |
d4c08f2a PM |
148 | int grplo, int grphi, unsigned long qsmask), |
149 | ||
150 | TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask), | |
151 | ||
152 | TP_STRUCT__entry( | |
e66c33d5 | 153 | __field(const char *, rcuname) |
d4c08f2a PM |
154 | __field(unsigned long, gpnum) |
155 | __field(u8, level) | |
156 | __field(int, grplo) | |
157 | __field(int, grphi) | |
158 | __field(unsigned long, qsmask) | |
159 | ), | |
160 | ||
161 | TP_fast_assign( | |
162 | __entry->rcuname = rcuname; | |
163 | __entry->gpnum = gpnum; | |
164 | __entry->level = level; | |
165 | __entry->grplo = grplo; | |
166 | __entry->grphi = grphi; | |
167 | __entry->qsmask = qsmask; | |
168 | ), | |
169 | ||
170 | TP_printk("%s %lu %u %d %d %lx", | |
171 | __entry->rcuname, __entry->gpnum, __entry->level, | |
172 | __entry->grplo, __entry->grphi, __entry->qsmask) | |
173 | ); | |
174 | ||
e087816d PM |
175 | /* |
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: | |
179 | * | |
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. | |
f6a12f34 | 183 | * "endwake": Woke piggybackers up. |
e087816d PM |
184 | * "done": Someone else did the expedited grace period for us. |
185 | */ | |
186 | TRACE_EVENT(rcu_exp_grace_period, | |
187 | ||
188 | TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent), | |
189 | ||
190 | TP_ARGS(rcuname, gpseq, gpevent), | |
191 | ||
192 | TP_STRUCT__entry( | |
193 | __field(const char *, rcuname) | |
194 | __field(unsigned long, gpseq) | |
195 | __field(const char *, gpevent) | |
196 | ), | |
197 | ||
198 | TP_fast_assign( | |
199 | __entry->rcuname = rcuname; | |
200 | __entry->gpseq = gpseq; | |
201 | __entry->gpevent = gpevent; | |
202 | ), | |
203 | ||
204 | TP_printk("%s %lu %s", | |
205 | __entry->rcuname, __entry->gpseq, __entry->gpevent) | |
206 | ); | |
207 | ||
208 | /* | |
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: | |
214 | * | |
f6a12f34 PM |
215 | * "nxtlvl": Advance to next level of rcu_node funnel |
216 | * "wait": Wait for someone else to do expedited GP | |
e087816d PM |
217 | */ |
218 | TRACE_EVENT(rcu_exp_funnel_lock, | |
219 | ||
220 | TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi, | |
221 | const char *gpevent), | |
222 | ||
223 | TP_ARGS(rcuname, level, grplo, grphi, gpevent), | |
224 | ||
225 | TP_STRUCT__entry( | |
226 | __field(const char *, rcuname) | |
227 | __field(u8, level) | |
228 | __field(int, grplo) | |
229 | __field(int, grphi) | |
230 | __field(const char *, gpevent) | |
231 | ), | |
232 | ||
233 | TP_fast_assign( | |
234 | __entry->rcuname = rcuname; | |
235 | __entry->level = level; | |
236 | __entry->grplo = grplo; | |
237 | __entry->grphi = grphi; | |
238 | __entry->gpevent = gpevent; | |
239 | ), | |
240 | ||
241 | TP_printk("%s %d %d %d %s", | |
242 | __entry->rcuname, __entry->level, __entry->grplo, | |
243 | __entry->grphi, __entry->gpevent) | |
244 | ); | |
245 | ||
9261dd0d PM |
246 | /* |
247 | * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended | |
248 | * to assist debugging of these handoffs. | |
249 | * | |
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: | |
253 | * | |
254 | * "WakeEmpty": Wake rcuo kthread, first CB to empty list. | |
9fdd3bc9 | 255 | * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list. |
9261dd0d | 256 | * "WakeOvf": Wake rcuo kthread, CB list is huge. |
9fdd3bc9 | 257 | * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge. |
9261dd0d PM |
258 | * "WakeNot": Don't wake rcuo kthread. |
259 | * "WakeNotPoll": Don't wake rcuo kthread because it is polling. | |
9fdd3bc9 | 260 | * "DeferredWake": Carried out the "IsDeferred" wakeup. |
69a79bb1 PM |
261 | * "Poll": Start of new polling cycle for rcu_nocb_poll. |
262 | * "Sleep": Sleep waiting for CBs for !rcu_nocb_poll. | |
9261dd0d PM |
263 | * "WokeEmpty": rcuo kthread woke to find empty list. |
264 | * "WokeNonEmpty": rcuo kthread woke to find non-empty list. | |
69a79bb1 PM |
265 | * "WaitQueue": Enqueue partially done, timed wait for it to complete. |
266 | * "WokeQueue": Partial enqueue now complete. | |
9261dd0d PM |
267 | */ |
268 | TRACE_EVENT(rcu_nocb_wake, | |
269 | ||
270 | TP_PROTO(const char *rcuname, int cpu, const char *reason), | |
271 | ||
272 | TP_ARGS(rcuname, cpu, reason), | |
273 | ||
274 | TP_STRUCT__entry( | |
275 | __field(const char *, rcuname) | |
276 | __field(int, cpu) | |
277 | __field(const char *, reason) | |
278 | ), | |
279 | ||
280 | TP_fast_assign( | |
281 | __entry->rcuname = rcuname; | |
282 | __entry->cpu = cpu; | |
283 | __entry->reason = reason; | |
284 | ), | |
285 | ||
286 | TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason) | |
287 | ); | |
288 | ||
d4c08f2a PM |
289 | /* |
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. | |
294 | */ | |
295 | TRACE_EVENT(rcu_preempt_task, | |
296 | ||
e66c33d5 | 297 | TP_PROTO(const char *rcuname, int pid, unsigned long gpnum), |
d4c08f2a PM |
298 | |
299 | TP_ARGS(rcuname, pid, gpnum), | |
300 | ||
301 | TP_STRUCT__entry( | |
e66c33d5 | 302 | __field(const char *, rcuname) |
d4c08f2a PM |
303 | __field(unsigned long, gpnum) |
304 | __field(int, pid) | |
305 | ), | |
306 | ||
307 | TP_fast_assign( | |
308 | __entry->rcuname = rcuname; | |
309 | __entry->gpnum = gpnum; | |
310 | __entry->pid = pid; | |
311 | ), | |
312 | ||
313 | TP_printk("%s %lu %d", | |
314 | __entry->rcuname, __entry->gpnum, __entry->pid) | |
315 | ); | |
316 | ||
317 | /* | |
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. | |
321 | */ | |
322 | TRACE_EVENT(rcu_unlock_preempted_task, | |
323 | ||
e66c33d5 | 324 | TP_PROTO(const char *rcuname, unsigned long gpnum, int pid), |
d4c08f2a PM |
325 | |
326 | TP_ARGS(rcuname, gpnum, pid), | |
327 | ||
328 | TP_STRUCT__entry( | |
e66c33d5 | 329 | __field(const char *, rcuname) |
d4c08f2a PM |
330 | __field(unsigned long, gpnum) |
331 | __field(int, pid) | |
332 | ), | |
333 | ||
334 | TP_fast_assign( | |
335 | __entry->rcuname = rcuname; | |
336 | __entry->gpnum = gpnum; | |
337 | __entry->pid = pid; | |
338 | ), | |
339 | ||
340 | TP_printk("%s %lu %d", __entry->rcuname, __entry->gpnum, __entry->pid) | |
341 | ); | |
342 | ||
343 | /* | |
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. | |
350 | */ | |
351 | TRACE_EVENT(rcu_quiescent_state_report, | |
352 | ||
e66c33d5 | 353 | TP_PROTO(const char *rcuname, unsigned long gpnum, |
d4c08f2a PM |
354 | unsigned long mask, unsigned long qsmask, |
355 | u8 level, int grplo, int grphi, int gp_tasks), | |
356 | ||
357 | TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks), | |
358 | ||
359 | TP_STRUCT__entry( | |
e66c33d5 | 360 | __field(const char *, rcuname) |
d4c08f2a PM |
361 | __field(unsigned long, gpnum) |
362 | __field(unsigned long, mask) | |
363 | __field(unsigned long, qsmask) | |
364 | __field(u8, level) | |
365 | __field(int, grplo) | |
366 | __field(int, grphi) | |
367 | __field(u8, gp_tasks) | |
368 | ), | |
369 | ||
370 | TP_fast_assign( | |
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; | |
379 | ), | |
380 | ||
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) | |
385 | ); | |
386 | ||
387 | /* | |
388 | * Tracepoint for quiescent states detected by force_quiescent_state(). | |
3a19b46a PM |
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. | |
d4c08f2a PM |
394 | */ |
395 | TRACE_EVENT(rcu_fqs, | |
396 | ||
e66c33d5 | 397 | TP_PROTO(const char *rcuname, unsigned long gpnum, int cpu, const char *qsevent), |
d4c08f2a PM |
398 | |
399 | TP_ARGS(rcuname, gpnum, cpu, qsevent), | |
400 | ||
401 | TP_STRUCT__entry( | |
e66c33d5 | 402 | __field(const char *, rcuname) |
d4c08f2a PM |
403 | __field(unsigned long, gpnum) |
404 | __field(int, cpu) | |
e66c33d5 | 405 | __field(const char *, qsevent) |
d4c08f2a PM |
406 | ), |
407 | ||
408 | TP_fast_assign( | |
409 | __entry->rcuname = rcuname; | |
410 | __entry->gpnum = gpnum; | |
411 | __entry->cpu = cpu; | |
412 | __entry->qsevent = qsevent; | |
413 | ), | |
414 | ||
415 | TP_printk("%s %lu %d %s", | |
416 | __entry->rcuname, __entry->gpnum, | |
417 | __entry->cpu, __entry->qsevent) | |
418 | ); | |
419 | ||
28f6569a | 420 | #endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) */ |
d4c08f2a PM |
421 | |
422 | /* | |
423 | * Tracepoint for dyntick-idle entry/exit events. These take a string | |
045fb931 PM |
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. | |
429 | * | |
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. | |
d4c08f2a PM |
434 | */ |
435 | TRACE_EVENT(rcu_dyntick, | |
436 | ||
e66c33d5 | 437 | TP_PROTO(const char *polarity, long long oldnesting, long long newnesting), |
d4c08f2a | 438 | |
4145fa7f | 439 | TP_ARGS(polarity, oldnesting, newnesting), |
d4c08f2a PM |
440 | |
441 | TP_STRUCT__entry( | |
e66c33d5 | 442 | __field(const char *, polarity) |
4145fa7f PM |
443 | __field(long long, oldnesting) |
444 | __field(long long, newnesting) | |
d4c08f2a PM |
445 | ), |
446 | ||
447 | TP_fast_assign( | |
448 | __entry->polarity = polarity; | |
4145fa7f PM |
449 | __entry->oldnesting = oldnesting; |
450 | __entry->newnesting = newnesting; | |
d4c08f2a PM |
451 | ), |
452 | ||
4145fa7f PM |
453 | TP_printk("%s %llx %llx", __entry->polarity, |
454 | __entry->oldnesting, __entry->newnesting) | |
d4c08f2a PM |
455 | ); |
456 | ||
433cdddc PM |
457 | /* |
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. | |
465 | * | |
466 | * These tracepoints take a string as argument: | |
467 | * | |
468 | * "No callbacks": Nothing to do, no callbacks on this CPU. | |
469 | * "In holdoff": Nothing to do, holding off after unsuccessful attempt. | |
433cdddc | 470 | * "Begin holdoff": Attempt failed, don't retry until next jiffy. |
7cb92499 | 471 | * "Dyntick with callbacks": Entering dyntick-idle despite callbacks. |
fd4b3526 | 472 | * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks. |
433cdddc PM |
473 | * "More callbacks": Still more callbacks, try again to clear them out. |
474 | * "Callbacks drained": All callbacks processed, off to dyntick idle! | |
7cb92499 | 475 | * "Timer": Timer fired to cause CPU to continue processing callbacks. |
21e52e15 | 476 | * "Demigrate": Timer fired on wrong CPU, woke up correct CPU. |
2fdbb31b | 477 | * "Cleanup after idle": Idle exited, timer canceled. |
433cdddc PM |
478 | */ |
479 | TRACE_EVENT(rcu_prep_idle, | |
480 | ||
e66c33d5 | 481 | TP_PROTO(const char *reason), |
433cdddc PM |
482 | |
483 | TP_ARGS(reason), | |
484 | ||
485 | TP_STRUCT__entry( | |
e66c33d5 | 486 | __field(const char *, reason) |
433cdddc PM |
487 | ), |
488 | ||
489 | TP_fast_assign( | |
490 | __entry->reason = reason; | |
491 | ), | |
492 | ||
493 | TP_printk("%s", __entry->reason) | |
494 | ); | |
495 | ||
d4c08f2a PM |
496 | /* |
497 | * Tracepoint for the registration of a single RCU callback function. | |
498 | * The first argument is the type of RCU, the second argument is | |
486e2593 PM |
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. | |
d4c08f2a PM |
502 | */ |
503 | TRACE_EVENT(rcu_callback, | |
504 | ||
e66c33d5 | 505 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen_lazy, |
486e2593 | 506 | long qlen), |
d4c08f2a | 507 | |
486e2593 | 508 | TP_ARGS(rcuname, rhp, qlen_lazy, qlen), |
d4c08f2a PM |
509 | |
510 | TP_STRUCT__entry( | |
e66c33d5 | 511 | __field(const char *, rcuname) |
d4c08f2a PM |
512 | __field(void *, rhp) |
513 | __field(void *, func) | |
486e2593 | 514 | __field(long, qlen_lazy) |
d4c08f2a PM |
515 | __field(long, qlen) |
516 | ), | |
517 | ||
518 | TP_fast_assign( | |
519 | __entry->rcuname = rcuname; | |
520 | __entry->rhp = rhp; | |
521 | __entry->func = rhp->func; | |
486e2593 | 522 | __entry->qlen_lazy = qlen_lazy; |
d4c08f2a PM |
523 | __entry->qlen = qlen; |
524 | ), | |
525 | ||
486e2593 PM |
526 | TP_printk("%s rhp=%p func=%pf %ld/%ld", |
527 | __entry->rcuname, __entry->rhp, __entry->func, | |
528 | __entry->qlen_lazy, __entry->qlen) | |
d4c08f2a PM |
529 | ); |
530 | ||
531 | /* | |
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, | |
486e2593 PM |
536 | * the fourth argument is the number of lazy callbacks queued, and the |
537 | * fifth argument is the total number of callbacks queued. | |
d4c08f2a PM |
538 | */ |
539 | TRACE_EVENT(rcu_kfree_callback, | |
540 | ||
e66c33d5 | 541 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset, |
486e2593 | 542 | long qlen_lazy, long qlen), |
d4c08f2a | 543 | |
486e2593 | 544 | TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen), |
d4c08f2a PM |
545 | |
546 | TP_STRUCT__entry( | |
e66c33d5 | 547 | __field(const char *, rcuname) |
d4c08f2a PM |
548 | __field(void *, rhp) |
549 | __field(unsigned long, offset) | |
486e2593 | 550 | __field(long, qlen_lazy) |
d4c08f2a PM |
551 | __field(long, qlen) |
552 | ), | |
553 | ||
554 | TP_fast_assign( | |
555 | __entry->rcuname = rcuname; | |
556 | __entry->rhp = rhp; | |
557 | __entry->offset = offset; | |
486e2593 | 558 | __entry->qlen_lazy = qlen_lazy; |
d4c08f2a PM |
559 | __entry->qlen = qlen; |
560 | ), | |
561 | ||
486e2593 | 562 | TP_printk("%s rhp=%p func=%ld %ld/%ld", |
d4c08f2a | 563 | __entry->rcuname, __entry->rhp, __entry->offset, |
486e2593 | 564 | __entry->qlen_lazy, __entry->qlen) |
d4c08f2a PM |
565 | ); |
566 | ||
300df91c PM |
567 | /* |
568 | * Tracepoint for marking the beginning rcu_do_batch, performed to start | |
72fe701b | 569 | * RCU callback invocation. The first argument is the RCU flavor, |
486e2593 PM |
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. | |
29c00b4a PM |
573 | */ |
574 | TRACE_EVENT(rcu_batch_start, | |
575 | ||
e66c33d5 | 576 | TP_PROTO(const char *rcuname, long qlen_lazy, long qlen, long blimit), |
29c00b4a | 577 | |
486e2593 | 578 | TP_ARGS(rcuname, qlen_lazy, qlen, blimit), |
29c00b4a PM |
579 | |
580 | TP_STRUCT__entry( | |
e66c33d5 | 581 | __field(const char *, rcuname) |
486e2593 | 582 | __field(long, qlen_lazy) |
300df91c | 583 | __field(long, qlen) |
3aac7a8d | 584 | __field(long, blimit) |
29c00b4a PM |
585 | ), |
586 | ||
587 | TP_fast_assign( | |
72fe701b | 588 | __entry->rcuname = rcuname; |
486e2593 | 589 | __entry->qlen_lazy = qlen_lazy; |
300df91c PM |
590 | __entry->qlen = qlen; |
591 | __entry->blimit = blimit; | |
29c00b4a PM |
592 | ), |
593 | ||
3aac7a8d | 594 | TP_printk("%s CBs=%ld/%ld bl=%ld", |
486e2593 PM |
595 | __entry->rcuname, __entry->qlen_lazy, __entry->qlen, |
596 | __entry->blimit) | |
29c00b4a PM |
597 | ); |
598 | ||
599 | /* | |
300df91c | 600 | * Tracepoint for the invocation of a single RCU callback function. |
d4c08f2a PM |
601 | * The first argument is the type of RCU, and the second argument is |
602 | * a pointer to the RCU callback itself. | |
29c00b4a PM |
603 | */ |
604 | TRACE_EVENT(rcu_invoke_callback, | |
605 | ||
e66c33d5 | 606 | TP_PROTO(const char *rcuname, struct rcu_head *rhp), |
29c00b4a | 607 | |
d4c08f2a | 608 | TP_ARGS(rcuname, rhp), |
29c00b4a PM |
609 | |
610 | TP_STRUCT__entry( | |
e66c33d5 | 611 | __field(const char *, rcuname) |
d4c08f2a PM |
612 | __field(void *, rhp) |
613 | __field(void *, func) | |
29c00b4a PM |
614 | ), |
615 | ||
616 | TP_fast_assign( | |
d4c08f2a | 617 | __entry->rcuname = rcuname; |
300df91c PM |
618 | __entry->rhp = rhp; |
619 | __entry->func = rhp->func; | |
29c00b4a PM |
620 | ), |
621 | ||
d4c08f2a PM |
622 | TP_printk("%s rhp=%p func=%pf", |
623 | __entry->rcuname, __entry->rhp, __entry->func) | |
29c00b4a PM |
624 | ); |
625 | ||
626 | /* | |
300df91c | 627 | * Tracepoint for the invocation of a single RCU callback of the special |
d4c08f2a PM |
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 | |
631 | * data structure. | |
29c00b4a PM |
632 | */ |
633 | TRACE_EVENT(rcu_invoke_kfree_callback, | |
634 | ||
e66c33d5 | 635 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset), |
29c00b4a | 636 | |
d4c08f2a | 637 | TP_ARGS(rcuname, rhp, offset), |
29c00b4a PM |
638 | |
639 | TP_STRUCT__entry( | |
e66c33d5 | 640 | __field(const char *, rcuname) |
d4c08f2a | 641 | __field(void *, rhp) |
300df91c | 642 | __field(unsigned long, offset) |
29c00b4a PM |
643 | ), |
644 | ||
645 | TP_fast_assign( | |
d4c08f2a | 646 | __entry->rcuname = rcuname; |
300df91c | 647 | __entry->rhp = rhp; |
29c00b4a PM |
648 | __entry->offset = offset; |
649 | ), | |
650 | ||
d4c08f2a PM |
651 | TP_printk("%s rhp=%p func=%ld", |
652 | __entry->rcuname, __entry->rhp, __entry->offset) | |
29c00b4a PM |
653 | ); |
654 | ||
655 | /* | |
300df91c | 656 | * Tracepoint for exiting rcu_do_batch after RCU callbacks have been |
4968c300 PM |
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(). | |
29c00b4a PM |
665 | */ |
666 | TRACE_EVENT(rcu_batch_end, | |
667 | ||
e66c33d5 | 668 | TP_PROTO(const char *rcuname, int callbacks_invoked, |
15f5191b | 669 | char cb, char nr, char iit, char risk), |
29c00b4a | 670 | |
4968c300 | 671 | TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk), |
29c00b4a PM |
672 | |
673 | TP_STRUCT__entry( | |
e66c33d5 | 674 | __field(const char *, rcuname) |
300df91c | 675 | __field(int, callbacks_invoked) |
15f5191b PM |
676 | __field(char, cb) |
677 | __field(char, nr) | |
678 | __field(char, iit) | |
679 | __field(char, risk) | |
29c00b4a PM |
680 | ), |
681 | ||
682 | TP_fast_assign( | |
72fe701b | 683 | __entry->rcuname = rcuname; |
300df91c | 684 | __entry->callbacks_invoked = callbacks_invoked; |
4968c300 PM |
685 | __entry->cb = cb; |
686 | __entry->nr = nr; | |
687 | __entry->iit = iit; | |
688 | __entry->risk = risk; | |
689 | ), | |
690 | ||
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' : '.') | |
29c00b4a PM |
697 | ); |
698 | ||
91afaf30 PM |
699 | /* |
700 | * Tracepoint for rcutorture readers. The first argument is the name | |
701 | * of the RCU flavor from rcutorture's viewpoint and the second argument | |
d0af39e8 PM |
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. | |
91afaf30 | 706 | */ |
b3c98314 | 707 | #define RCUTORTURENAME_LEN 8 |
91afaf30 PM |
708 | TRACE_EVENT(rcu_torture_read, |
709 | ||
e66c33d5 | 710 | TP_PROTO(const char *rcutorturename, struct rcu_head *rhp, |
52494535 | 711 | unsigned long secs, unsigned long c_old, unsigned long c), |
91afaf30 | 712 | |
52494535 | 713 | TP_ARGS(rcutorturename, rhp, secs, c_old, c), |
91afaf30 PM |
714 | |
715 | TP_STRUCT__entry( | |
b3c98314 | 716 | __field(char, rcutorturename[RCUTORTURENAME_LEN]) |
91afaf30 | 717 | __field(struct rcu_head *, rhp) |
52494535 PM |
718 | __field(unsigned long, secs) |
719 | __field(unsigned long, c_old) | |
720 | __field(unsigned long, c) | |
91afaf30 PM |
721 | ), |
722 | ||
723 | TP_fast_assign( | |
b3c98314 PM |
724 | strncpy(__entry->rcutorturename, rcutorturename, |
725 | RCUTORTURENAME_LEN); | |
726 | __entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0; | |
91afaf30 | 727 | __entry->rhp = rhp; |
52494535 PM |
728 | __entry->secs = secs; |
729 | __entry->c_old = c_old; | |
730 | __entry->c = c; | |
91afaf30 PM |
731 | ), |
732 | ||
52494535 PM |
733 | TP_printk("%s torture read %p %luus c: %lu %lu", |
734 | __entry->rcutorturename, __entry->rhp, | |
735 | __entry->secs, __entry->c_old, __entry->c) | |
91afaf30 PM |
736 | ); |
737 | ||
a83eff0a PM |
738 | /* |
739 | * Tracepoint for _rcu_barrier() execution. The string "s" describes | |
740 | * the _rcu_barrier phase: | |
d7e29933 | 741 | * "Begin": _rcu_barrier() started. |
d7e29933 PM |
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. | |
a83eff0a | 748 | * "IRQ": An rcu_barrier_callback() callback posted on remote CPU. |
f92c734f | 749 | * "IRQNQ": An rcu_barrier_callback() callback found no callbacks. |
a83eff0a PM |
750 | * "CB": An rcu_barrier_callback() invoked a callback, not the last. |
751 | * "LastCB": An rcu_barrier_callback() invoked the last callback. | |
d7e29933 | 752 | * "Inc2": _rcu_barrier() piggyback check counter incremented. |
a83eff0a PM |
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. | |
755 | */ | |
756 | TRACE_EVENT(rcu_barrier, | |
757 | ||
e66c33d5 | 758 | TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done), |
a83eff0a PM |
759 | |
760 | TP_ARGS(rcuname, s, cpu, cnt, done), | |
761 | ||
762 | TP_STRUCT__entry( | |
e66c33d5 SRRH |
763 | __field(const char *, rcuname) |
764 | __field(const char *, s) | |
a83eff0a PM |
765 | __field(int, cpu) |
766 | __field(int, cnt) | |
767 | __field(unsigned long, done) | |
768 | ), | |
769 | ||
770 | TP_fast_assign( | |
771 | __entry->rcuname = rcuname; | |
772 | __entry->s = s; | |
773 | __entry->cpu = cpu; | |
774 | __entry->cnt = cnt; | |
775 | __entry->done = done; | |
776 | ), | |
777 | ||
778 | TP_printk("%s %s cpu %d remaining %d # %lu", | |
779 | __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt, | |
780 | __entry->done) | |
781 | ); | |
782 | ||
d4c08f2a PM |
783 | #else /* #ifdef CONFIG_RCU_TRACE */ |
784 | ||
785 | #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0) | |
bd9f0686 PM |
786 | #define trace_rcu_future_grace_period(rcuname, gpnum, completed, c, \ |
787 | level, grplo, grphi, event) \ | |
788 | do { } while (0) | |
e087816d PM |
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) \ | |
792 | do { } while (0) | |
793 | #define trace_rcu_exp_funnel_lock(rcuname, level, grplo, grphi, gpevent) \ | |
794 | do { } while (0) | |
9261dd0d | 795 | #define trace_rcu_nocb_wake(rcuname, cpu, reason) do { } while (0) |
d4c08f2a PM |
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) | |
486e2593 PM |
798 | #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \ |
799 | grplo, grphi, gp_tasks) do { } \ | |
800 | while (0) | |
d4c08f2a | 801 | #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0) |
4145fa7f | 802 | #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0) |
433cdddc | 803 | #define trace_rcu_prep_idle(reason) do { } while (0) |
486e2593 PM |
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) \ | |
806 | do { } while (0) | |
807 | #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \ | |
808 | do { } while (0) | |
d4c08f2a PM |
809 | #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0) |
810 | #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0) | |
4968c300 PM |
811 | #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \ |
812 | do { } while (0) | |
52494535 PM |
813 | #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \ |
814 | do { } while (0) | |
a83eff0a | 815 | #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0) |
d4c08f2a PM |
816 | |
817 | #endif /* #else #ifdef CONFIG_RCU_TRACE */ | |
818 | ||
29c00b4a PM |
819 | #endif /* _TRACE_RCU_H */ |
820 | ||
821 | /* This part must be outside protection */ | |
822 | #include <trace/define_trace.h> |