aboutsummaryrefslogtreecommitdiff
path: root/include/trace/events/timer.h
blob: 1844c48d640e3477edf791868e4e72248f7e3381 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
#undef TRACE_SYSTEM
#define TRACE_SYSTEM timer

#if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_TIMER_H

#include <linux/tracepoint.h>
#include <linux/hrtimer.h>
#include <linux/timer.h>

/**
 * timer_init - called when the timer is initialized
 * @timer:	pointer to struct timer_list
 */
TRACE_EVENT(timer_init,

	TP_PROTO(struct timer_list *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
	),

	TP_printk("timer %p", __entry->timer)
);

/**
 * timer_start - called when the timer is started
 * @timer:	pointer to struct timer_list
 * @expires:	the timers expiry time
 */
TRACE_EVENT(timer_start,

	TP_PROTO(struct timer_list *timer, unsigned long expires),

	TP_ARGS(timer, expires),

	TP_STRUCT__entry(
		__field( void *,	timer		)
		__field( void *,	function	)
		__field( unsigned long,	expires		)
		__field( unsigned long,	now		)
	),

	TP_fast_assign(
		__entry->timer		= timer;
		__entry->function	= timer->function;
		__entry->expires	= expires;
		__entry->now		= jiffies;
	),

	TP_printk("timer %p: func %pf, expires %lu, timeout %ld",
		  __entry->timer, __entry->function, __entry->expires,
		  (long)__entry->expires - __entry->now)
);

/**
 * timer_expire_entry - called immediately before the timer callback
 * @timer:	pointer to struct timer_list
 *
 * Allows to determine the timer latency.
 */
TRACE_EVENT(timer_expire_entry,

	TP_PROTO(struct timer_list *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer	)
		__field( unsigned long,	now	)
	),

	TP_fast_assign(
		__entry->timer		= timer;
		__entry->now		= jiffies;
	),

	TP_printk("timer %p: now %lu", __entry->timer, __entry->now)
);

/**
 * timer_expire_exit - called immediately after the timer callback returns
 * @timer:	pointer to struct timer_list
 *
 * When used in combination with the timer_expire_entry tracepoint we can
 * determine the runtime of the timer callback function.
 *
 * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might
 * be invalid. We solely track the pointer.
 */
TRACE_EVENT(timer_expire_exit,

	TP_PROTO(struct timer_list *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field(void *,	timer	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
	),

	TP_printk("timer %p", __entry->timer)
);

/**
 * timer_cancel - called when the timer is canceled
 * @timer:	pointer to struct timer_list
 */
TRACE_EVENT(timer_cancel,

	TP_PROTO(struct timer_list *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
	),

	TP_printk("timer %p", __entry->timer)
);

/**
 * hrtimer_init - called when the hrtimer is initialized
 * @timer:	pointer to struct hrtimer
 * @clockid:	the hrtimers clock
 * @mode:	the hrtimers mode
 */
TRACE_EVENT(hrtimer_init,

	TP_PROTO(struct hrtimer *timer, clockid_t clockid,
		 enum hrtimer_mode mode),

	TP_ARGS(timer, clockid, mode),

	TP_STRUCT__entry(
		__field( void *,		timer		)
		__field( clockid_t,		clockid		)
		__field( enum hrtimer_mode,	mode		)
	),

	TP_fast_assign(
		__entry->timer		= timer;
		__entry->clockid	= clockid;
		__entry->mode		= mode;
	),

	TP_printk("hrtimer %p, clockid %s, mode %s", __entry->timer,
		  __entry->clockid == CLOCK_REALTIME ?
			"CLOCK_REALTIME" : "CLOCK_MONOTONIC",
		  __entry->mode == HRTIMER_MODE_ABS ?
			"HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
);

/**
 * hrtimer_start - called when the hrtimer is started
 * @timer: pointer to struct hrtimer
 */
TRACE_EVENT(hrtimer_start,

	TP_PROTO(struct hrtimer *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer		)
		__field( void *,	function	)
		__field( s64,		expires		)
		__field( s64,		softexpires	)
	),

	TP_fast_assign(
		__entry->timer		= timer;
		__entry->function	= timer->function;
		__entry->expires	= hrtimer_get_expires(timer).tv64;
		__entry->softexpires	= hrtimer_get_softexpires(timer).tv64;
	),

	TP_printk("hrtimer %p, func %pf, expires %llu, softexpires %llu",
		  __entry->timer, __entry->function,
		  (unsigned long long)ktime_to_ns((ktime_t) {
				  .tv64 = __entry->expires }),
		  (unsigned long long)ktime_to_ns((ktime_t) {
				  .tv64 = __entry->softexpires }))
);

/**
 * htimmer_expire_entry - called immediately before the hrtimer callback
 * @timer:	pointer to struct hrtimer
 * @now:	pointer to variable which contains current time of the
 *		timers base.
 *
 * Allows to determine the timer latency.
 */
TRACE_EVENT(hrtimer_expire_entry,

	TP_PROTO(struct hrtimer *timer, ktime_t *now),

	TP_ARGS(timer, now),

	TP_STRUCT__entry(
		__field( void *,	timer	)
		__field( s64,		now	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
		__entry->now	= now->tv64;
	),

	TP_printk("hrtimer %p, now %llu", __entry->timer,
		  (unsigned long long)ktime_to_ns((ktime_t) {
				  .tv64 = __entry->now }))
 );

/**
 * hrtimer_expire_exit - called immediately after the hrtimer callback returns
 * @timer:	pointer to struct hrtimer
 *
 * When used in combination with the hrtimer_expire_entry tracepoint we can
 * determine the runtime of the callback function.
 */
TRACE_EVENT(hrtimer_expire_exit,

	TP_PROTO(struct hrtimer *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
	),

	TP_printk("hrtimer %p", __entry->timer)
);

/**
 * hrtimer_cancel - called when the hrtimer is canceled
 * @timer:	pointer to struct hrtimer
 */
TRACE_EVENT(hrtimer_cancel,

	TP_PROTO(struct hrtimer *timer),

	TP_ARGS(timer),

	TP_STRUCT__entry(
		__field( void *,	timer	)
	),

	TP_fast_assign(
		__entry->timer	= timer;
	),

	TP_printk("hrtimer %p", __entry->timer)
);

/**
 * itimer_state - called when itimer is started or canceled
 * @which:	name of the interval timer
 * @value:	the itimers value, itimer is canceled if value->it_value is
 *		zero, otherwise it is started
 * @expires:	the itimers expiry time
 */
TRACE_EVENT(itimer_state,

	TP_PROTO(int which, const struct itimerval *const value,
		 cputime_t expires),

	TP_ARGS(which, value, expires),

	TP_STRUCT__entry(
		__field(	int,		which		)
		__field(	cputime_t,	expires		)
		__field(	long,		value_sec	)
		__field(	long,		value_usec	)
		__field(	long,		interval_sec	)
		__field(	long,		interval_usec	)
	),

	TP_fast_assign(
		__entry->which		= which;
		__entry->expires	= expires;
		__entry->value_sec	= value->it_value.tv_sec;
		__entry->value_usec	= value->it_value.tv_usec;
		__entry->interval_sec	= value->it_interval.tv_sec;
		__entry->interval_usec	= value->it_interval.tv_usec;
	),

	TP_printk("which %d, expires %lu, it_value %lu.%lu, it_interval %lu.%lu",
		  __entry->which, __entry->expires,
		  __entry->value_sec, __entry->value_usec,
		  __entry->interval_sec, __entry->interval_usec)
);

/**
 * itimer_expire - called when itimer expires
 * @which:	type of the interval timer
 * @pid:	pid of the process which owns the timer
 * @now:	current time, used to calculate the latency of itimer
 */
TRACE_EVENT(itimer_expire,

	TP_PROTO(int which, struct pid *pid, cputime_t now),

	TP_ARGS(which, pid, now),

	TP_STRUCT__entry(
		__field( int ,		which	)
		__field( pid_t,		pid	)
		__field( cputime_t,	now	)
	),

	TP_fast_assign(
		__entry->which	= which;
		__entry->now	= now;
		__entry->pid	= pid_nr(pid);
	),

	    TP_printk("which %d, pid %d, now %lu", __entry->which,
		      (int) __entry->pid, __entry->now)
);

#endif /*  _TRACE_TIMER_H */

/* This part must be outside protection */
#include <trace/define_trace.h>