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 and "End" for
247 TRACE_EVENT(rcu_dyntick
,
249 TP_PROTO(char *polarity
, long long oldnesting
, long long newnesting
),
251 TP_ARGS(polarity
, oldnesting
, newnesting
),
254 __field(char *, polarity
)
255 __field(long long, oldnesting
)
256 __field(long long, newnesting
)
260 __entry
->polarity
= polarity
;
261 __entry
->oldnesting
= oldnesting
;
262 __entry
->newnesting
= newnesting
;
265 TP_printk("%s %llx %llx", __entry
->polarity
,
266 __entry
->oldnesting
, __entry
->newnesting
)
270 * Tracepoint for the registration of a single RCU callback function.
271 * The first argument is the type of RCU, the second argument is
272 * a pointer to the RCU callback itself, and the third element is the
273 * new RCU callback queue length for the current CPU.
275 TRACE_EVENT(rcu_callback
,
277 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, long qlen
),
279 TP_ARGS(rcuname
, rhp
, qlen
),
282 __field(char *, rcuname
)
284 __field(void *, func
)
289 __entry
->rcuname
= rcuname
;
291 __entry
->func
= rhp
->func
;
292 __entry
->qlen
= qlen
;
295 TP_printk("%s rhp=%p func=%pf %ld",
296 __entry
->rcuname
, __entry
->rhp
, __entry
->func
, __entry
->qlen
)
300 * Tracepoint for the registration of a single RCU callback of the special
301 * kfree() form. The first argument is the RCU type, the second argument
302 * is a pointer to the RCU callback, the third argument is the offset
303 * of the callback within the enclosing RCU-protected data structure,
304 * and the fourth argument is the new RCU callback queue length for the
307 TRACE_EVENT(rcu_kfree_callback
,
309 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
,
312 TP_ARGS(rcuname
, rhp
, offset
, qlen
),
315 __field(char *, rcuname
)
317 __field(unsigned long, offset
)
322 __entry
->rcuname
= rcuname
;
324 __entry
->offset
= offset
;
325 __entry
->qlen
= qlen
;
328 TP_printk("%s rhp=%p func=%ld %ld",
329 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
,
334 * Tracepoint for marking the beginning rcu_do_batch, performed to start
335 * RCU callback invocation. The first argument is the RCU flavor,
336 * the second is the total number of callbacks (including those that
337 * are not yet ready to be invoked), and the third argument is the
338 * current RCU-callback batch limit.
340 TRACE_EVENT(rcu_batch_start
,
342 TP_PROTO(char *rcuname
, long qlen
, int blimit
),
344 TP_ARGS(rcuname
, qlen
, blimit
),
347 __field(char *, rcuname
)
353 __entry
->rcuname
= rcuname
;
354 __entry
->qlen
= qlen
;
355 __entry
->blimit
= blimit
;
358 TP_printk("%s CBs=%ld bl=%d",
359 __entry
->rcuname
, __entry
->qlen
, __entry
->blimit
)
363 * Tracepoint for the invocation of a single RCU callback function.
364 * The first argument is the type of RCU, and the second argument is
365 * a pointer to the RCU callback itself.
367 TRACE_EVENT(rcu_invoke_callback
,
369 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
),
371 TP_ARGS(rcuname
, rhp
),
374 __field(char *, rcuname
)
376 __field(void *, func
)
380 __entry
->rcuname
= rcuname
;
382 __entry
->func
= rhp
->func
;
385 TP_printk("%s rhp=%p func=%pf",
386 __entry
->rcuname
, __entry
->rhp
, __entry
->func
)
390 * Tracepoint for the invocation of a single RCU callback of the special
391 * kfree() form. The first argument is the RCU flavor, the second
392 * argument is a pointer to the RCU callback, and the third argument
393 * is the offset of the callback within the enclosing RCU-protected
396 TRACE_EVENT(rcu_invoke_kfree_callback
,
398 TP_PROTO(char *rcuname
, struct rcu_head
*rhp
, unsigned long offset
),
400 TP_ARGS(rcuname
, rhp
, offset
),
403 __field(char *, rcuname
)
405 __field(unsigned long, offset
)
409 __entry
->rcuname
= rcuname
;
411 __entry
->offset
= offset
;
414 TP_printk("%s rhp=%p func=%ld",
415 __entry
->rcuname
, __entry
->rhp
, __entry
->offset
)
419 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
420 * invoked. The first argument is the name of the RCU flavor and
421 * the second argument is number of callbacks actually invoked.
423 TRACE_EVENT(rcu_batch_end
,
425 TP_PROTO(char *rcuname
, int callbacks_invoked
),
427 TP_ARGS(rcuname
, callbacks_invoked
),
430 __field(char *, rcuname
)
431 __field(int, callbacks_invoked
)
435 __entry
->rcuname
= rcuname
;
436 __entry
->callbacks_invoked
= callbacks_invoked
;
439 TP_printk("%s CBs-invoked=%d",
440 __entry
->rcuname
, __entry
->callbacks_invoked
)
444 * Tracepoint for rcutorture readers. The first argument is the name
445 * of the RCU flavor from rcutorture's viewpoint and the second argument
446 * is the callback address.
448 TRACE_EVENT(rcu_torture_read
,
450 TP_PROTO(char *rcutorturename
, struct rcu_head
*rhp
),
452 TP_ARGS(rcutorturename
, rhp
),
455 __field(char *, rcutorturename
)
456 __field(struct rcu_head
*, rhp
)
460 __entry
->rcutorturename
= rcutorturename
;
464 TP_printk("%s torture read %p",
465 __entry
->rcutorturename
, __entry
->rhp
)
468 #else /* #ifdef CONFIG_RCU_TRACE */
470 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
471 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, qsmask) do { } while (0)
472 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
473 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
474 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks) do { } while (0)
475 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
476 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
477 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
478 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
479 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
480 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
481 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
482 #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
483 #define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
485 #endif /* #else #ifdef CONFIG_RCU_TRACE */
487 #endif /* _TRACE_RCU_H */
489 /* This part must be outside protection */
490 #include <trace/define_trace.h>