summaryrefslogtreecommitdiffstats
path: root/include/trace/events/rcu.h
blob: 508824e5a77de07b4481eb4ac27c76bab830abf5 (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
#undef TRACE_SYSTEM
#define TRACE_SYSTEM rcu

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

#include <linux/tracepoint.h>

/*
 * Tracepoint for start/end markers used for utilization calculations.
 * By convention, the string is of the following forms:
 *
 * "Start <activity>" -- Mark the start of the specified activity,
 *			 such as "context switch".  Nesting is permitted.
 * "End <activity>" -- Mark the end of the specified activity.
 */
TRACE_EVENT(rcu_utilization,

	TP_PROTO(char *s),

	TP_ARGS(s),

	TP_STRUCT__entry(
		__field(char *,	s)
	),

	TP_fast_assign(
		__entry->s = s;
	),

	TP_printk("%s", __entry->s)
);

/*
 * Tracepoint for marking the beginning rcu_do_batch, performed to start
 * RCU callback invocation.  The first argument is the RCU flavor,
 * the second is the total number of callbacks (including those that
 * are not yet ready to be invoked), and the third argument is the
 * current RCU-callback batch limit.
 */
TRACE_EVENT(rcu_batch_start,

	TP_PROTO(char *rcuname, long qlen, int blimit),

	TP_ARGS(rcuname, qlen, blimit),

	TP_STRUCT__entry(
		__field(char *, rcuname)
		__field(long, qlen)
		__field(int, blimit)
	),

	TP_fast_assign(
		__entry->rcuname = rcuname;
		__entry->qlen = qlen;
		__entry->blimit = blimit;
	),

	TP_printk("%s CBs=%ld bl=%d",
		  __entry->rcuname, __entry->qlen, __entry->blimit)
);

/*
 * Tracepoint for the invocation of a single RCU callback function.
 * The argument is a pointer to the RCU callback itself.
 */
TRACE_EVENT(rcu_invoke_callback,

	TP_PROTO(struct rcu_head *rhp),

	TP_ARGS(rhp),

	TP_STRUCT__entry(
		__field(void *,	rhp)
		__field(void *,	func)
	),

	TP_fast_assign(
		__entry->rhp = rhp;
		__entry->func = rhp->func;
	),

	TP_printk("rhp=%p func=%pf", __entry->rhp, __entry->func)
);

/*
 * Tracepoint for the invocation of a single RCU callback of the special
 * kfree() form.  The first argument is a pointer to the RCU callback
 * and the second argument is the offset of the callback within the
 * enclosing RCU-protected data structure.
 */
TRACE_EVENT(rcu_invoke_kfree_callback,

	TP_PROTO(struct rcu_head *rhp, unsigned long offset),

	TP_ARGS(rhp, offset),

	TP_STRUCT__entry(
		__field(void *,	rhp)
		__field(unsigned long, offset)
	),

	TP_fast_assign(
		__entry->rhp = rhp;
		__entry->offset	= offset;
	),

	TP_printk("rhp=%p func=%ld", __entry->rhp, __entry->offset)
);

/*
 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
 * invoked.  The first argument is the name of the RCU flavor and
 * the second argument is number of callbacks actually invoked.
 */
TRACE_EVENT(rcu_batch_end,

	TP_PROTO(char *rcuname, int callbacks_invoked),

	TP_ARGS(rcuname, callbacks_invoked),

	TP_STRUCT__entry(
		__field(char *, rcuname)
		__field(int, callbacks_invoked)
	),

	TP_fast_assign(
		__entry->rcuname = rcuname;
		__entry->callbacks_invoked = callbacks_invoked;
	),

	TP_printk("%s CBs-invoked=%d",
		  __entry->rcuname, __entry->callbacks_invoked)
);

#endif /* _TRACE_RCU_H */

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