2 #define TRACE_SYSTEM rcu
4 #if !defined(LTTNG_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
5 #define LTTNG_TRACE_RCU_H
7 #include <probes/lttng-tracepoint-event.h>
8 #include <linux/version.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 LTTNG_TRACEPOINT_EVENT(rcu_utilization
,
23 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
24 TP_PROTO(const char *s
),
25 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
27 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
36 #ifdef CONFIG_RCU_TRACE
38 #if defined(CONFIG_TREE_RCU) \
39 || (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) \
40 && defined(CONFIG_PREEMPT_RCU)) \
41 || defined(CONFIG_TREE_PREEMPT_RCU)
44 * Tracepoint for grace-period events: starting and ending a grace
45 * period ("start" and "end", respectively), a CPU noting the start
46 * of a new grace period or the end of an old grace period ("cpustart"
47 * and "cpuend", respectively), a CPU passing through a quiescent
48 * state ("cpuqs"), a CPU coming online or going offline ("cpuonl"
49 * and "cpuofl", respectively), and a CPU being kicked for being too
50 * long in dyntick-idle mode ("kick").
52 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
53 LTTNG_TRACEPOINT_EVENT(rcu_grace_period
,
55 TP_PROTO(const char *rcuname
, unsigned long gp_seq
, const char *gpevent
),
57 TP_ARGS(rcuname
, gp_seq
, gpevent
),
60 ctf_string(rcuname
, rcuname
)
61 ctf_integer(unsigned long, gp_seq
, gp_seq
)
62 ctf_string(gpevent
, gpevent
)
65 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
66 LTTNG_TRACEPOINT_EVENT(rcu_grace_period
,
68 TP_PROTO(const char *rcuname
, unsigned long gpnum
, const char *gpevent
),
70 TP_ARGS(rcuname
, gpnum
, gpevent
),
73 ctf_string(rcuname
, rcuname
)
74 ctf_integer(unsigned long, gpnum
, gpnum
)
75 ctf_string(gpevent
, gpevent
)
79 LTTNG_TRACEPOINT_EVENT(rcu_grace_period
,
81 TP_PROTO(char *rcuname
, unsigned long gpnum
, char *gpevent
),
83 TP_ARGS(rcuname
, gpnum
, gpevent
),
86 ctf_string(rcuname
, rcuname
)
87 ctf_integer(unsigned long, gpnum
, gpnum
)
88 ctf_string(gpevent
, gpevent
)
94 * Tracepoint for grace-period-initialization events. These are
95 * distinguished by the type of RCU, the new grace-period number, the
96 * rcu_node structure level, the starting and ending CPU covered by the
97 * rcu_node structure, and the mask of CPUs that will be waited for.
98 * All but the type of RCU are extracted from the rcu_node structure.
100 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
101 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init
,
103 TP_PROTO(const char *rcuname
, unsigned long gp_seq
, u8 level
,
104 int grplo
, int grphi
, unsigned long qsmask
),
106 TP_ARGS(rcuname
, gp_seq
, level
, grplo
, grphi
, qsmask
),
109 ctf_string(rcuname
, rcuname
)
110 ctf_integer(unsigned long, gp_seq
, gp_seq
)
111 ctf_integer(u8
, level
, level
)
112 ctf_integer(int, grplo
, grplo
)
113 ctf_integer(int, grphi
, grphi
)
114 ctf_integer(unsigned long, qsmask
, qsmask
)
117 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
118 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init
,
120 TP_PROTO(const char *rcuname
, unsigned long gpnum
, u8 level
,
121 int grplo
, int grphi
, unsigned long qsmask
),
123 TP_ARGS(rcuname
, gpnum
, level
, grplo
, grphi
, qsmask
),
126 ctf_string(rcuname
, rcuname
)
127 ctf_integer(unsigned long, gpnum
, gpnum
)
128 ctf_integer(u8
, level
, level
)
129 ctf_integer(int, grplo
, grplo
)
130 ctf_integer(int, grphi
, grphi
)
131 ctf_integer(unsigned long, qsmask
, qsmask
)
135 LTTNG_TRACEPOINT_EVENT(rcu_grace_period_init
,
137 TP_PROTO(char *rcuname
, unsigned long gpnum
, u8 level
,
138 int grplo
, int grphi
, unsigned long qsmask
),
140 TP_ARGS(rcuname
, gpnum
, level
, grplo
, grphi
, qsmask
),
143 ctf_string(rcuname
, rcuname
)
144 ctf_integer(unsigned long, gpnum
, gpnum
)
145 ctf_integer(u8
, level
, level
)
146 ctf_integer(int, grplo
, grplo
)
147 ctf_integer(int, grphi
, grphi
)
148 ctf_integer(unsigned long, qsmask
, qsmask
)
154 * Tracepoint for tasks blocking within preemptible-RCU read-side
155 * critical sections. Track the type of RCU (which one day might
156 * include SRCU), the grace-period number that the task is blocking
157 * (the current or the next), and the task's PID.
159 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
160 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task
,
162 TP_PROTO(const char *rcuname
, int pid
, unsigned long gp_seq
),
164 TP_ARGS(rcuname
, pid
, gp_seq
),
167 ctf_string(rcuname
, rcuname
)
168 ctf_integer(unsigned long, gp_seq
, gp_seq
)
169 ctf_integer(int, pid
, pid
)
172 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
173 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task
,
175 TP_PROTO(const char *rcuname
, int pid
, unsigned long gpnum
),
177 TP_ARGS(rcuname
, pid
, gpnum
),
180 ctf_string(rcuname
, rcuname
)
181 ctf_integer(unsigned long, gpnum
, gpnum
)
182 ctf_integer(int, pid
, pid
)
186 LTTNG_TRACEPOINT_EVENT(rcu_preempt_task
,
188 TP_PROTO(char *rcuname
, int pid
, unsigned long gpnum
),
190 TP_ARGS(rcuname
, pid
, gpnum
),
193 ctf_string(rcuname
, rcuname
)
194 ctf_integer(unsigned long, gpnum
, gpnum
)
195 ctf_integer(int, pid
, pid
)
201 * Tracepoint for tasks that blocked within a given preemptible-RCU
202 * read-side critical section exiting that critical section. Track the
203 * type of RCU (which one day might include SRCU) and the task's PID.
205 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
206 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task
,
208 TP_PROTO(const char *rcuname
, unsigned long gp_seq
, int pid
),
210 TP_ARGS(rcuname
, gp_seq
, pid
),
213 ctf_string(rcuname
, rcuname
)
214 ctf_integer(unsigned long, gp_seq
, gp_seq
)
215 ctf_integer(int, pid
, pid
)
218 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
219 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task
,
221 TP_PROTO(const char *rcuname
, unsigned long gpnum
, int pid
),
223 TP_ARGS(rcuname
, gpnum
, pid
),
226 ctf_string(rcuname
, rcuname
)
227 ctf_integer(unsigned long, gpnum
, gpnum
)
228 ctf_integer(int, pid
, pid
)
232 LTTNG_TRACEPOINT_EVENT(rcu_unlock_preempted_task
,
234 TP_PROTO(char *rcuname
, unsigned long gpnum
, int pid
),
236 TP_ARGS(rcuname
, gpnum
, pid
),
239 ctf_string(rcuname
, rcuname
)
240 ctf_integer(unsigned long, gpnum
, gpnum
)
241 ctf_integer(int, pid
, pid
)
247 * Tracepoint for quiescent-state-reporting events. These are
248 * distinguished by the type of RCU, the grace-period number, the
249 * mask of quiescent lower-level entities, the rcu_node structure level,
250 * the starting and ending CPU covered by the rcu_node structure, and
251 * whether there are any blocked tasks blocking the current grace period.
252 * All but the type of RCU are extracted from the rcu_node structure.
254 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
255 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report
,
257 TP_PROTO(const char *rcuname
, unsigned long gp_seq
,
258 unsigned long mask
, unsigned long qsmask
,
259 u8 level
, int grplo
, int grphi
, int gp_tasks
),
261 TP_ARGS(rcuname
, gp_seq
, mask
, qsmask
, level
, grplo
, grphi
, gp_tasks
),
264 ctf_string(rcuname
, rcuname
)
265 ctf_integer(unsigned long, gp_seq
, gp_seq
)
266 ctf_integer(unsigned long, mask
, mask
)
267 ctf_integer(unsigned long, qsmask
, qsmask
)
268 ctf_integer(u8
, level
, level
)
269 ctf_integer(int, grplo
, grplo
)
270 ctf_integer(int, grphi
, grphi
)
271 ctf_integer(u8
, gp_tasks
, gp_tasks
)
274 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
275 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report
,
277 TP_PROTO(const char *rcuname
, unsigned long gpnum
,
278 unsigned long mask
, unsigned long qsmask
,
279 u8 level
, int grplo
, int grphi
, int gp_tasks
),
281 TP_ARGS(rcuname
, gpnum
, mask
, qsmask
, level
, grplo
, grphi
, gp_tasks
),
284 ctf_string(rcuname
, rcuname
)
285 ctf_integer(unsigned long, gpnum
, gpnum
)
286 ctf_integer(unsigned long, mask
, mask
)
287 ctf_integer(unsigned long, qsmask
, qsmask
)
288 ctf_integer(u8
, level
, level
)
289 ctf_integer(int, grplo
, grplo
)
290 ctf_integer(int, grphi
, grphi
)
291 ctf_integer(u8
, gp_tasks
, gp_tasks
)
295 LTTNG_TRACEPOINT_EVENT(rcu_quiescent_state_report
,
297 TP_PROTO(char *rcuname
, unsigned long gpnum
,
298 unsigned long mask
, unsigned long qsmask
,
299 u8 level
, int grplo
, int grphi
, int gp_tasks
),
301 TP_ARGS(rcuname
, gpnum
, mask
, qsmask
, level
, grplo
, grphi
, gp_tasks
),
304 ctf_string(rcuname
, rcuname
)
305 ctf_integer(unsigned long, gpnum
, gpnum
)
306 ctf_integer(unsigned long, mask
, mask
)
307 ctf_integer(unsigned long, qsmask
, qsmask
)
308 ctf_integer(u8
, level
, level
)
309 ctf_integer(int, grplo
, grplo
)
310 ctf_integer(int, grphi
, grphi
)
311 ctf_integer(u8
, gp_tasks
, gp_tasks
)
317 * Tracepoint for quiescent states detected by force_quiescent_state().
318 * These trace events include the type of RCU, the grace-period number
319 * that was blocked by the CPU, the CPU itself, and the type of quiescent
320 * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
321 * or "kick" when kicking a CPU that has been in dyntick-idle mode for
324 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
325 LTTNG_TRACEPOINT_EVENT(rcu_fqs
,
327 TP_PROTO(const char *rcuname
, unsigned long gp_seq
, int cpu
, const char *qsevent
),
329 TP_ARGS(rcuname
, gp_seq
, cpu
, qsevent
),
332 ctf_integer(unsigned long, gp_seq
, gp_seq
)
333 ctf_integer(int, cpu
, cpu
)
334 ctf_string(rcuname
, rcuname
)
335 ctf_string(qsevent
, qsevent
)
338 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
339 LTTNG_TRACEPOINT_EVENT(rcu_fqs
,
341 TP_PROTO(const char *rcuname
, unsigned long gpnum
, int cpu
, const char *qsevent
),
343 TP_ARGS(rcuname
, gpnum
, cpu
, qsevent
),
346 ctf_integer(unsigned long, gpnum
, gpnum
)
347 ctf_integer(int, cpu
, cpu
)
348 ctf_string(rcuname
, rcuname
)
349 ctf_string(qsevent
, qsevent
)
353 LTTNG_TRACEPOINT_EVENT(rcu_fqs
,
355 TP_PROTO(char *rcuname
, unsigned long gpnum
, int cpu
, char *qsevent
),
357 TP_ARGS(rcuname
, gpnum
, cpu
, qsevent
),
360 ctf_integer(unsigned long, gpnum
, gpnum
)
361 ctf_integer(int, cpu
, cpu
)
362 ctf_string(rcuname
, rcuname
)
363 ctf_string(qsevent
, qsevent
)
369 * #if defined(CONFIG_TREE_RCU)
370 * || (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0)
371 * && defined(CONFIG_PREEMPT_RCU))
372 * || defined(CONFIG_TREE_PREEMPT_RCU)
376 * Tracepoint for dyntick-idle entry/exit events. These take a string
377 * as argument: "Start" for entering dyntick-idle mode, "End" for
378 * leaving it, "--=" for events moving towards idle, and "++=" for events
379 * moving away from idle. "Error on entry: not idle task" and "Error on
380 * exit: not idle task" indicate that a non-idle task is erroneously
381 * toying with the idle loop.
383 * These events also take a pair of numbers, which indicate the nesting
384 * depth before and after the event of interest. Note that task-related
385 * events use the upper bits of each number, while interrupt-related
386 * events use the lower bits.
388 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
389 LTTNG_TRACEPOINT_EVENT(rcu_dyntick
,
391 TP_PROTO(const char *polarity
, long oldnesting
, long newnesting
, atomic_t dynticks
),
393 TP_ARGS(polarity
, oldnesting
, newnesting
, dynticks
),
396 ctf_string(polarity
, polarity
)
397 ctf_integer(long, oldnesting
, oldnesting
)
398 ctf_integer(long, newnesting
, newnesting
)
399 ctf_integer(int, dynticks
, atomic_read(&dynticks
))
403 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
404 LTTNG_TRACEPOINT_EVENT(rcu_dyntick
,
406 TP_PROTO(const char *polarity
, long long oldnesting
, long long newnesting
),
408 TP_ARGS(polarity
, oldnesting
, newnesting
),
411 ctf_string(polarity
, polarity
)
412 ctf_integer(long long, oldnesting
, oldnesting
)
413 ctf_integer(long long, newnesting
, newnesting
)
416 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
417 LTTNG_TRACEPOINT_EVENT(rcu_dyntick
,
419 TP_PROTO(char *polarity
, long long oldnesting
, long long newnesting
),
421 TP_ARGS(polarity
, oldnesting
, newnesting
),
424 ctf_string(polarity
, polarity
)
425 ctf_integer(long long, oldnesting
, oldnesting
)
426 ctf_integer(long long, newnesting
, newnesting
)
430 LTTNG_TRACEPOINT_EVENT(rcu_dyntick
,
432 TP_PROTO(char *polarity
),
437 ctf_string(polarity
, polarity
)
443 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
445 * Tracepoint for RCU preparation for idle, the goal being to get RCU
446 * processing done so that the current CPU can shut off its scheduling
447 * clock and enter dyntick-idle mode. One way to accomplish this is
448 * to drain all RCU callbacks from this CPU, and the other is to have
449 * done everything RCU requires for the current grace period. In this
450 * latter case, the CPU will be awakened at the end of the current grace
451 * period in order to process the remainder of its callbacks.
453 * These tracepoints take a string as argument:
455 * "No callbacks": Nothing to do, no callbacks on this CPU.
456 * "In holdoff": Nothing to do, holding off after unsuccessful attempt.
457 * "Begin holdoff": Attempt failed, don't retry until next jiffy.
458 * "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
459 * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
460 * "More callbacks": Still more callbacks, try again to clear them out.
461 * "Callbacks drained": All callbacks processed, off to dyntick idle!
462 * "Timer": Timer fired to cause CPU to continue processing callbacks.
463 * "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
464 * "Cleanup after idle": Idle exited, timer canceled.
466 LTTNG_TRACEPOINT_EVENT(rcu_prep_idle
,
468 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
469 TP_PROTO(const char *reason
),
470 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
471 TP_PROTO(char *reason
),
472 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
477 ctf_string(reason
, reason
)
483 * Tracepoint for the registration of a single RCU callback function.
484 * The first argument is the type of RCU, the second argument is
485 * a pointer to the RCU callback itself, the third element is the
486 * number of lazy callbacks queued, and the fourth element is the
487 * total number of callbacks queued.
489 LTTNG_TRACEPOINT_EVENT(rcu_callback
,
491 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
492 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, long qlen_lazy
,
495 TP_ARGS(rcuname
, rhp
, qlen_lazy
, qlen
),
496 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
497 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, long qlen_lazy
,
500 TP_ARGS(rcuname
, rhp
, qlen_lazy
, qlen
),
502 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, long qlen
),
504 TP_ARGS(rcuname
, rhp
, qlen
),
508 ctf_string(rcuname
, rcuname
)
509 ctf_integer_hex(void *, rhp
, rhp
)
510 ctf_integer_hex(void *, func
, rhp
->func
)
511 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
512 ctf_integer(long, qlen_lazy
, qlen_lazy
)
514 ctf_integer(long, qlen
, qlen
)
519 * Tracepoint for the registration of a single RCU callback of the special
520 * kfree() form. The first argument is the RCU type, the second argument
521 * is a pointer to the RCU callback, the third argument is the offset
522 * of the callback within the enclosing RCU-protected data structure,
523 * the fourth argument is the number of lazy callbacks queued, and the
524 * fifth argument is the total number of callbacks queued.
526 LTTNG_TRACEPOINT_EVENT(rcu_kfree_callback
,
529 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
530 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
531 long qlen_lazy
, long qlen
),
533 TP_ARGS(rcuname
, rhp
, offset
, qlen_lazy
, qlen
),
534 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
535 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
536 long qlen_lazy
, long qlen
),
538 TP_ARGS(rcuname
, rhp
, offset
, qlen_lazy
, qlen
),
540 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
543 TP_ARGS(rcuname
, rhp
, offset
, qlen
),
547 ctf_string(rcuname
, rcuname
)
548 ctf_integer_hex(void *, rhp
, rhp
)
549 ctf_integer_hex(unsigned long, offset
, offset
)
550 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
551 ctf_integer(long, qlen_lazy
, qlen_lazy
)
553 ctf_integer(long, qlen
, qlen
)
558 * Tracepoint for marking the beginning rcu_do_batch, performed to start
559 * RCU callback invocation. The first argument is the RCU flavor,
560 * the second is the number of lazy callbacks queued, the third is
561 * the total number of callbacks queued, and the fourth argument is
562 * the current RCU-callback batch limit.
564 LTTNG_TRACEPOINT_EVENT(rcu_batch_start
,
566 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
567 TP_PROTO(const char *rcuname
, long qlen_lazy
, long qlen
, long blimit
),
569 TP_ARGS(rcuname
, qlen_lazy
, qlen
, blimit
),
570 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
571 TP_PROTO(char *rcuname
, long qlen_lazy
, long qlen
, long blimit
),
573 TP_ARGS(rcuname
, qlen_lazy
, qlen
, blimit
),
574 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
575 TP_PROTO(char *rcuname
, long qlen_lazy
, long qlen
, int blimit
),
577 TP_ARGS(rcuname
, qlen_lazy
, qlen
, blimit
),
579 TP_PROTO(char *rcuname
, long qlen
, int blimit
),
581 TP_ARGS(rcuname
, qlen
, blimit
),
585 ctf_string(rcuname
, rcuname
)
586 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
587 ctf_integer(long, qlen_lazy
, qlen_lazy
)
589 ctf_integer(long, qlen
, qlen
)
590 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
591 ctf_integer(long, blimit
, blimit
)
593 ctf_integer(int, blimit
, blimit
)
599 * Tracepoint for the invocation of a single RCU callback function.
600 * The first argument is the type of RCU, and the second argument is
601 * a pointer to the RCU callback itself.
603 LTTNG_TRACEPOINT_EVENT(rcu_invoke_callback
,
605 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
606 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
),
607 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
608 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
),
609 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
611 TP_ARGS(rcuname
, rhp
),
614 ctf_string(rcuname
, rcuname
)
615 ctf_integer_hex(void *, rhp
, rhp
)
616 ctf_integer_hex(void *, func
, rhp
->func
)
621 * Tracepoint for the invocation of a single RCU callback of the special
622 * kfree() form. The first argument is the RCU flavor, the second
623 * argument is a pointer to the RCU callback, and the third argument
624 * is the offset of the callback within the enclosing RCU-protected
627 LTTNG_TRACEPOINT_EVENT(rcu_invoke_kfree_callback
,
629 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
630 TP_PROTO(const char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
),
631 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
632 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
),
633 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
635 TP_ARGS(rcuname
, rhp
, offset
),
638 ctf_string(rcuname
, rcuname
)
639 ctf_integer_hex(void *, rhp
, rhp
)
640 ctf_integer(unsigned long, offset
, offset
)
645 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
646 * invoked. The first argument is the name of the RCU flavor,
647 * the second argument is number of callbacks actually invoked,
648 * the third argument (cb) is whether or not any of the callbacks that
649 * were ready to invoke at the beginning of this batch are still
650 * queued, the fourth argument (nr) is the return value of need_resched(),
651 * the fifth argument (iit) is 1 if the current task is the idle task,
652 * and the sixth argument (risk) is the return value from
653 * rcu_is_callbacks_kthread().
655 LTTNG_TRACEPOINT_EVENT(rcu_batch_end
,
657 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
658 TP_PROTO(const char *rcuname
, int callbacks_invoked
,
659 char cb
, char nr
, char iit
, char risk
),
661 TP_ARGS(rcuname
, callbacks_invoked
, cb
, nr
, iit
, risk
),
662 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
663 TP_PROTO(const char *rcuname
, int callbacks_invoked
,
664 bool cb
, bool nr
, bool iit
, bool risk
),
666 TP_ARGS(rcuname
, callbacks_invoked
, cb
, nr
, iit
, risk
),
667 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
668 TP_PROTO(char *rcuname
, int callbacks_invoked
,
669 bool cb
, bool nr
, bool iit
, bool risk
),
671 TP_ARGS(rcuname
, callbacks_invoked
, cb
, nr
, iit
, risk
),
673 TP_PROTO(char *rcuname
, int callbacks_invoked
),
675 TP_ARGS(rcuname
, callbacks_invoked
),
679 ctf_string(rcuname
, rcuname
)
680 ctf_integer(int, callbacks_invoked
, callbacks_invoked
)
681 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
682 ctf_integer(char, cb
, cb
)
683 ctf_integer(char, nr
, nr
)
684 ctf_integer(char, iit
, iit
)
685 ctf_integer(char, risk
, risk
)
686 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
687 ctf_integer(bool, cb
, cb
)
688 ctf_integer(bool, nr
, nr
)
689 ctf_integer(bool, iit
, iit
)
690 ctf_integer(bool, risk
, risk
)
695 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
697 * Tracepoint for rcutorture readers. The first argument is the name
698 * of the RCU flavor from rcutorture's viewpoint and the second argument
699 * is the callback address.
701 LTTNG_TRACEPOINT_EVENT(rcu_torture_read
,
703 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
704 TP_PROTO(const char *rcutorturename
, struct rcu_head
*rhp
,
705 unsigned long secs
, unsigned long c_old
, unsigned long c
),
707 TP_ARGS(rcutorturename
, rhp
, secs
, c_old
, c
),
708 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
709 TP_PROTO(char *rcutorturename
, struct rcu_head
*rhp
,
710 unsigned long secs
, unsigned long c_old
, unsigned long c
),
712 TP_ARGS(rcutorturename
, rhp
, secs
, c_old
, c
),
714 TP_PROTO(char *rcutorturename
, struct rcu_head
*rhp
),
716 TP_ARGS(rcutorturename
, rhp
),
720 ctf_string(rcutorturename
, rcutorturename
)
721 ctf_integer_hex(struct rcu_head
*, rhp
, rhp
)
722 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
723 ctf_integer(unsigned long, secs
, secs
)
724 ctf_integer(unsigned long, c_old
, c_old
)
725 ctf_integer(unsigned long, c
, c
)
731 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
733 * Tracepoint for _rcu_barrier() execution. The string "s" describes
734 * the _rcu_barrier phase:
735 * "Begin": rcu_barrier_callback() started.
736 * "Check": rcu_barrier_callback() checking for piggybacking.
737 * "EarlyExit": rcu_barrier_callback() piggybacked, thus early exit.
738 * "Inc1": rcu_barrier_callback() piggyback check counter incremented.
739 * "Offline": rcu_barrier_callback() found offline CPU
740 * "OnlineQ": rcu_barrier_callback() found online CPU with callbacks.
741 * "OnlineNQ": rcu_barrier_callback() found online CPU, no callbacks.
742 * "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
743 * "CB": An rcu_barrier_callback() invoked a callback, not the last.
744 * "LastCB": An rcu_barrier_callback() invoked the last callback.
745 * "Inc2": rcu_barrier_callback() piggyback check counter incremented.
746 * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
747 * is the count of remaining callbacks, and "done" is the piggybacking count.
749 LTTNG_TRACEPOINT_EVENT(rcu_barrier
,
751 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
752 TP_PROTO(const char *rcuname
, const char *s
, int cpu
, int cnt
, unsigned long done
),
753 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
754 TP_PROTO(char *rcuname
, char *s
, int cpu
, int cnt
, unsigned long done
),
755 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)) */
757 TP_ARGS(rcuname
, s
, cpu
, cnt
, done
),
760 ctf_string(rcuname
, rcuname
)
762 ctf_integer(int, cpu
, cpu
)
763 ctf_integer(int, cnt
, cnt
)
764 ctf_integer(unsigned long, done
, done
)
769 #else /* #ifdef CONFIG_RCU_TRACE */
771 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
772 #define trace_rcu_grace_period(rcuname, gp_seq, gpevent) do { } while (0)
773 #define trace_rcu_grace_period_init(rcuname, gp_seq, level, grplo, grphi, \
774 qsmask) do { } while (0)
775 #define trace_rcu_preempt_task(rcuname, pid, gp_seq) do { } while (0)
776 #define trace_rcu_unlock_preempted_task(rcuname, gp_seq, pid) do { } while (0)
777 #define trace_rcu_quiescent_state_report(rcuname, gp_seq, mask, qsmask, level, \
778 grplo, grphi, gp_tasks) do { } \
780 #define trace_rcu_fqs(rcuname, gp_seq, cpu, qsevent) do { } while (0)
782 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
783 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
784 qsmask) do { } while (0)
785 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
786 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
787 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
788 grplo, grphi, gp_tasks) do { } \
790 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
793 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
794 #define trace_rcu_dyntick(polarity, oldnesting, newnesting, dyntick) do { } while (0)
795 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
796 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
798 #define trace_rcu_dyntick(polarity) do { } while (0)
800 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
801 #define trace_rcu_prep_idle(reason) do { } while (0)
803 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
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) \
810 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
811 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
812 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
814 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
815 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
816 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
817 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
820 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
822 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
823 #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
825 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
826 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
828 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
829 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
831 #endif /* #else #ifdef CONFIG_RCU_TRACE */
833 #endif /* LTTNG_TRACE_RCU_H */
835 /* This part must be outside protection */
836 #include <probes/define_trace.h>