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f62b389e MD |
1 | #undef TRACE_SYSTEM |
2 | #define TRACE_SYSTEM irq | |
3 | ||
4 | #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ) | |
5 | #define _TRACE_IRQ_H | |
6 | ||
7 | #include <linux/tracepoint.h> | |
8 | ||
9 | struct irqaction; | |
10 | struct softirq_action; | |
11 | ||
12 | #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq } | |
13 | #define show_softirq_name(val) \ | |
14 | __print_symbolic(val, \ | |
15 | softirq_name(HI), \ | |
16 | softirq_name(TIMER), \ | |
17 | softirq_name(NET_TX), \ | |
18 | softirq_name(NET_RX), \ | |
19 | softirq_name(BLOCK), \ | |
20 | softirq_name(BLOCK_IOPOLL), \ | |
21 | softirq_name(TASKLET), \ | |
22 | softirq_name(SCHED), \ | |
23 | softirq_name(HRTIMER), \ | |
24 | softirq_name(RCU)) | |
25 | ||
26 | /** | |
27 | * irq_handler_entry - called immediately before the irq action handler | |
28 | * @irq: irq number | |
29 | * @action: pointer to struct irqaction | |
30 | * | |
31 | * The struct irqaction pointed to by @action contains various | |
32 | * information about the handler, including the device name, | |
33 | * @action->name, and the device id, @action->dev_id. When used in | |
34 | * conjunction with the irq_handler_exit tracepoint, we can figure | |
35 | * out irq handler latencies. | |
36 | */ | |
37 | TRACE_EVENT(irq_handler_entry, | |
38 | ||
39 | TP_PROTO(int irq, struct irqaction *action), | |
40 | ||
41 | TP_ARGS(irq, action), | |
42 | ||
43 | TP_STRUCT__entry( | |
44 | __field( int, irq ) | |
45 | __string( name, action->name ) | |
46 | ), | |
47 | ||
48 | TP_fast_assign( | |
49 | __entry->irq = irq; | |
50 | __assign_str(name, action->name); | |
51 | ), | |
52 | ||
53 | TP_printk("irq=%d name=%s", __entry->irq, __get_str(name)) | |
54 | ); | |
55 | ||
56 | /** | |
57 | * irq_handler_exit - called immediately after the irq action handler returns | |
58 | * @irq: irq number | |
59 | * @action: pointer to struct irqaction | |
60 | * @ret: return value | |
61 | * | |
62 | * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding | |
63 | * @action->handler scuccessully handled this irq. Otherwise, the irq might be | |
64 | * a shared irq line, or the irq was not handled successfully. Can be used in | |
65 | * conjunction with the irq_handler_entry to understand irq handler latencies. | |
66 | */ | |
67 | TRACE_EVENT(irq_handler_exit, | |
68 | ||
69 | TP_PROTO(int irq, struct irqaction *action, int ret), | |
70 | ||
71 | TP_ARGS(irq, action, ret), | |
72 | ||
73 | TP_STRUCT__entry( | |
74 | __field( int, irq ) | |
75 | __field( int, ret ) | |
76 | ), | |
77 | ||
78 | TP_fast_assign( | |
79 | __entry->irq = irq; | |
80 | __entry->ret = ret; | |
81 | ), | |
82 | ||
83 | TP_printk("irq=%d ret=%s", | |
84 | __entry->irq, __entry->ret ? "handled" : "unhandled") | |
85 | ); | |
86 | ||
87 | DECLARE_EVENT_CLASS(softirq, | |
88 | ||
89 | TP_PROTO(unsigned int vec_nr), | |
90 | ||
91 | TP_ARGS(vec_nr), | |
92 | ||
93 | TP_STRUCT__entry( | |
94 | __field( unsigned int, vec ) | |
95 | ), | |
96 | ||
97 | TP_fast_assign( | |
98 | __entry->vec = vec_nr; | |
99 | ), | |
100 | ||
101 | TP_printk("vec=%u [action=%s]", __entry->vec, | |
102 | show_softirq_name(__entry->vec)) | |
103 | ); | |
104 | ||
105 | /** | |
106 | * softirq_entry - called immediately before the softirq handler | |
107 | * @vec_nr: softirq vector number | |
108 | * | |
109 | * When used in combination with the softirq_exit tracepoint | |
110 | * we can determine the softirq handler runtine. | |
111 | */ | |
112 | DEFINE_EVENT(softirq, softirq_entry, | |
113 | ||
114 | TP_PROTO(unsigned int vec_nr), | |
115 | ||
116 | TP_ARGS(vec_nr) | |
117 | ); | |
118 | ||
119 | /** | |
120 | * softirq_exit - called immediately after the softirq handler returns | |
121 | * @vec_nr: softirq vector number | |
122 | * | |
123 | * When used in combination with the softirq_entry tracepoint | |
124 | * we can determine the softirq handler runtine. | |
125 | */ | |
126 | DEFINE_EVENT(softirq, softirq_exit, | |
127 | ||
128 | TP_PROTO(unsigned int vec_nr), | |
129 | ||
130 | TP_ARGS(vec_nr) | |
131 | ); | |
132 | ||
133 | /** | |
134 | * softirq_raise - called immediately when a softirq is raised | |
135 | * @vec_nr: softirq vector number | |
136 | * | |
137 | * When used in combination with the softirq_entry tracepoint | |
138 | * we can determine the softirq raise to run latency. | |
139 | */ | |
140 | DEFINE_EVENT(softirq, softirq_raise, | |
141 | ||
142 | TP_PROTO(unsigned int vec_nr), | |
143 | ||
144 | TP_ARGS(vec_nr) | |
145 | ); | |
146 | ||
147 | #endif /* _TRACE_IRQ_H */ | |
148 | ||
149 | /* This part must be outside protection */ | |
150 | #include <trace/define_trace.h> |