2 #define TRACE_SYSTEM rcu
4 #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
7 #include <linux/tracepoint.h>
10 * Tracepoint for start/end markers used for utilization calculations.
11 * By convention, the string is of the following forms:
13 * "Start <activity>" -- Mark the start of the specified activity,
14 * such as "context switch". Nesting is permitted.
15 * "End <activity>" -- Mark the end of the specified activity.
17 * An "@" character within "<activity>" is a comment character: Data
18 * reduction scripts will ignore the "@" and the remainder of the line.
20 TRACE_EVENT(rcu_utilization
,
34 TP_printk("%s", __entry
->s
)
37 #ifdef CONFIG_RCU_TRACE
39 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU)
42 * Tracepoint for grace-period events: starting and ending a grace
43 * period ("start" and "end", respectively), a CPU noting the start
44 * of a new grace period or the end of an old grace period ("cpustart"
45 * and "cpuend", respectively), a CPU passing through a quiescent
46 * state ("cpuqs"), a CPU coming online or going offline ("cpuonl"
47 * and "cpuofl", respectively), and a CPU being kicked for being too
48 * long in dyntick-idle mode ("kick").
50 TRACE_EVENT(rcu_grace_period
,
52 TP_PROTO(char *rcuname
, unsigned long gpnum
, char *gpevent
),
54 TP_ARGS(rcuname
, gpnum
, gpevent
),
57 __field(char *, rcuname
)
58 __field(unsigned long, gpnum
)
59 __field(char *, gpevent
)
63 __entry
->rcuname
= rcuname
;
64 __entry
->gpnum
= gpnum
;
65 __entry
->gpevent
= gpevent
;
68 TP_printk("%s %lu %s",
69 __entry
->rcuname
, __entry
->gpnum
, __entry
->gpevent
)
73 * Tracepoint for grace-period-initialization events. These are
74 * distinguished by the type of RCU, the new grace-period number, the
75 * rcu_node structure level, the starting and ending CPU covered by the
76 * rcu_node structure, and the mask of CPUs that will be waited for.
77 * All but the type of RCU are extracted from the rcu_node structure.
79 TRACE_EVENT(rcu_grace_period_init
,
81 TP_PROTO(char *rcuname
, unsigned long gpnum
, u8 level
,
82 int grplo
, int grphi
, unsigned long qsmask
),
84 TP_ARGS(rcuname
, gpnum
, level
, grplo
, grphi
, qsmask
),
87 __field(char *, rcuname
)
88 __field(unsigned long, gpnum
)
92 __field(unsigned long, qsmask
)
96 __entry
->rcuname
= rcuname
;
97 __entry
->gpnum
= gpnum
;
98 __entry
->level
= level
;
99 __entry
->grplo
= grplo
;
100 __entry
->grphi
= grphi
;
101 __entry
->qsmask
= qsmask
;
104 TP_printk("%s %lu %u %d %d %lx",
105 __entry
->rcuname
, __entry
->gpnum
, __entry
->level
,
106 __entry
->grplo
, __entry
->grphi
, __entry
->qsmask
)
110 * Tracepoint for tasks blocking within preemptible-RCU read-side
111 * critical sections. Track the type of RCU (which one day might
112 * include SRCU), the grace-period number that the task is blocking
113 * (the current or the next), and the task's PID.
115 TRACE_EVENT(rcu_preempt_task
,
117 TP_PROTO(char *rcuname
, int pid
, unsigned long gpnum
),
119 TP_ARGS(rcuname
, pid
, gpnum
),
122 __field(char *, rcuname
)
123 __field(unsigned long, gpnum
)
128 __entry
->rcuname
= rcuname
;
129 __entry
->gpnum
= gpnum
;
133 TP_printk("%s %lu %d",
134 __entry
->rcuname
, __entry
->gpnum
, __entry
->pid
)
138 * Tracepoint for tasks that blocked within a given preemptible-RCU
139 * read-side critical section exiting that critical section. Track the
140 * type of RCU (which one day might include SRCU) and the task's PID.
142 TRACE_EVENT(rcu_unlock_preempted_task
,
144 TP_PROTO(char *rcuname
, unsigned long gpnum
, int pid
),
146 TP_ARGS(rcuname
, gpnum
, pid
),
149 __field(char *, rcuname
)
150 __field(unsigned long, gpnum
)
155 __entry
->rcuname
= rcuname
;
156 __entry
->gpnum
= gpnum
;
160 TP_printk("%s %lu %d", __entry
->rcuname
, __entry
->gpnum
, __entry
->pid
)
164 * Tracepoint for quiescent-state-reporting events. These are
165 * distinguished by the type of RCU, the grace-period number, the
166 * mask of quiescent lower-level entities, the rcu_node structure level,
167 * the starting and ending CPU covered by the rcu_node structure, and
168 * whether there are any blocked tasks blocking the current grace period.
169 * All but the type of RCU are extracted from the rcu_node structure.
171 TRACE_EVENT(rcu_quiescent_state_report
,
173 TP_PROTO(char *rcuname
, unsigned long gpnum
,
174 unsigned long mask
, unsigned long qsmask
,
175 u8 level
, int grplo
, int grphi
, int gp_tasks
),
177 TP_ARGS(rcuname
, gpnum
, mask
, qsmask
, level
, grplo
, grphi
, gp_tasks
),
180 __field(char *, rcuname
)
181 __field(unsigned long, gpnum
)
182 __field(unsigned long, mask
)
183 __field(unsigned long, qsmask
)
187 __field(u8
, gp_tasks
)
191 __entry
->rcuname
= rcuname
;
192 __entry
->gpnum
= gpnum
;
193 __entry
->mask
= mask
;
194 __entry
->qsmask
= qsmask
;
195 __entry
->level
= level
;
196 __entry
->grplo
= grplo
;
197 __entry
->grphi
= grphi
;
198 __entry
->gp_tasks
= gp_tasks
;
201 TP_printk("%s %lu %lx>%lx %u %d %d %u",
202 __entry
->rcuname
, __entry
->gpnum
,
203 __entry
->mask
, __entry
->qsmask
, __entry
->level
,
204 __entry
->grplo
, __entry
->grphi
, __entry
->gp_tasks
)
208 * Tracepoint for quiescent states detected by force_quiescent_state().
209 * These trace events include the type of RCU, the grace-period number
210 * that was blocked by the CPU, the CPU itself, and the type of quiescent
211 * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
212 * or "kick" when kicking a CPU that has been in dyntick-idle mode for
217 TP_PROTO(char *rcuname
, unsigned long gpnum
, int cpu
, char *qsevent
),
219 TP_ARGS(rcuname
, gpnum
, cpu
, qsevent
),
222 __field(char *, rcuname
)
223 __field(unsigned long, gpnum
)
225 __field(char *, qsevent
)
229 __entry
->rcuname
= rcuname
;
230 __entry
->gpnum
= gpnum
;
232 __entry
->qsevent
= qsevent
;
235 TP_printk("%s %lu %d %s",
236 __entry
->rcuname
, __entry
->gpnum
,
237 __entry
->cpu
, __entry
->qsevent
)
240 #endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) */
243 * Tracepoint for dyntick-idle entry/exit events. These take a string
244 * as argument: "Start" for entering dyntick-idle mode, "End" for
245 * leaving it, "--=" for events moving towards idle, and "++=" for events
246 * moving away from idle. "Error on entry: not idle task" and "Error on
247 * exit: not idle task" indicate that a non-idle task is erroneously
248 * toying with the idle loop.
250 * These events also take a pair of numbers, which indicate the nesting
251 * depth before and after the event of interest. Note that task-related
252 * events use the upper bits of each number, while interrupt-related
253 * events use the lower bits.
255 TRACE_EVENT(rcu_dyntick
,
257 TP_PROTO(char *polarity
, long long oldnesting
, long long newnesting
),
259 TP_ARGS(polarity
, oldnesting
, newnesting
),
262 __field(char *, polarity
)
263 __field(long long, oldnesting
)
264 __field(long long, newnesting
)
268 __entry
->polarity
= polarity
;
269 __entry
->oldnesting
= oldnesting
;
270 __entry
->newnesting
= newnesting
;
273 TP_printk("%s %llx %llx", __entry
->polarity
,
274 __entry
->oldnesting
, __entry
->newnesting
)
278 * Tracepoint for the registration of a single RCU callback function.
279 * The first argument is the type of RCU, the second argument is
280 * a pointer to the RCU callback itself, and the third element is the
281 * new RCU callback queue length for the current CPU.
283 TRACE_EVENT(rcu_callback
,
285 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, long qlen
),
287 TP_ARGS(rcuname
, rhp
, qlen
),
290 __field(char *, rcuname
)
292 __field(void *, func
)
297 __entry
->rcuname
= rcuname
;
299 __entry
->func
= rhp
->func
;
300 __entry
->qlen
= qlen
;
303 TP_printk("%s rhp=%p func=%pf %ld",
304 __entry
->rcuname
, __entry
->rhp
, __entry
->func
, __entry
->qlen
)
308 * Tracepoint for the registration of a single RCU callback of the special
309 * kfree() form. The first argument is the RCU type, the second argument
310 * is a pointer to the RCU callback, the third argument is the offset
311 * of the callback within the enclosing RCU-protected data structure,
312 * and the fourth argument is the new RCU callback queue length for the
315 TRACE_EVENT(rcu_kfree_callback
,
317 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
320 TP_ARGS(rcuname
, rhp
, offset
, qlen
),
323 __field(char *, rcuname
)
325 __field(unsigned long, offset
)
330 __entry
->rcuname
= rcuname
;
332 __entry
->offset
= offset
;
333 __entry
->qlen
= qlen
;
336 TP_printk("%s rhp=%p func=%ld %ld",
337 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
,
342 * Tracepoint for marking the beginning rcu_do_batch, performed to start
343 * RCU callback invocation. The first argument is the RCU flavor,
344 * the second is the total number of callbacks (including those that
345 * are not yet ready to be invoked), and the third argument is the
346 * current RCU-callback batch limit.
348 TRACE_EVENT(rcu_batch_start
,
350 TP_PROTO(char *rcuname
, long qlen
, int blimit
),
352 TP_ARGS(rcuname
, qlen
, blimit
),
355 __field(char *, rcuname
)
361 __entry
->rcuname
= rcuname
;
362 __entry
->qlen
= qlen
;
363 __entry
->blimit
= blimit
;
366 TP_printk("%s CBs=%ld bl=%d",
367 __entry
->rcuname
, __entry
->qlen
, __entry
->blimit
)
371 * Tracepoint for the invocation of a single RCU callback function.
372 * The first argument is the type of RCU, and the second argument is
373 * a pointer to the RCU callback itself.
375 TRACE_EVENT(rcu_invoke_callback
,
377 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
),
379 TP_ARGS(rcuname
, rhp
),
382 __field(char *, rcuname
)
384 __field(void *, func
)
388 __entry
->rcuname
= rcuname
;
390 __entry
->func
= rhp
->func
;
393 TP_printk("%s rhp=%p func=%pf",
394 __entry
->rcuname
, __entry
->rhp
, __entry
->func
)
398 * Tracepoint for the invocation of a single RCU callback of the special
399 * kfree() form. The first argument is the RCU flavor, the second
400 * argument is a pointer to the RCU callback, and the third argument
401 * is the offset of the callback within the enclosing RCU-protected
404 TRACE_EVENT(rcu_invoke_kfree_callback
,
406 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
),
408 TP_ARGS(rcuname
, rhp
, offset
),
411 __field(char *, rcuname
)
413 __field(unsigned long, offset
)
417 __entry
->rcuname
= rcuname
;
419 __entry
->offset
= offset
;
422 TP_printk("%s rhp=%p func=%ld",
423 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
)
427 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
428 * invoked. The first argument is the name of the RCU flavor and
429 * the second argument is number of callbacks actually invoked.
431 TRACE_EVENT(rcu_batch_end
,
433 TP_PROTO(char *rcuname
, int callbacks_invoked
),
435 TP_ARGS(rcuname
, callbacks_invoked
),
438 __field(char *, rcuname
)
439 __field(int, callbacks_invoked
)
443 __entry
->rcuname
= rcuname
;
444 __entry
->callbacks_invoked
= callbacks_invoked
;
447 TP_printk("%s CBs-invoked=%d",
448 __entry
->rcuname
, __entry
->callbacks_invoked
)
452 * Tracepoint for rcutorture readers. The first argument is the name
453 * of the RCU flavor from rcutorture's viewpoint and the second argument
454 * is the callback address.
456 TRACE_EVENT(rcu_torture_read
,
458 TP_PROTO(char *rcutorturename
, struct rcu_head
*rhp
),
460 TP_ARGS(rcutorturename
, rhp
),
463 __field(char *, rcutorturename
)
464 __field(struct rcu_head
*, rhp
)
468 __entry
->rcutorturename
= rcutorturename
;
472 TP_printk("%s torture read %p",
473 __entry
->rcutorturename
, __entry
->rhp
)
476 #else /* #ifdef CONFIG_RCU_TRACE */
478 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
479 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, qsmask) do { } while (0)
480 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
481 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
482 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks) do { } while (0)
483 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
484 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
485 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
486 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
487 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
488 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
489 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
490 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
491 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
493 #endif /* #else #ifdef CONFIG_RCU_TRACE */
495 #endif /* _TRACE_RCU_H */
497 /* This part must be outside protection */
498 #include <trace/define_trace.h>