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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 | #ifndef _TRACE_IRQ_DEF_ | |
10 | #define _TRACE_IRQ_DEF_ | |
11 | ||
12 | struct irqaction; | |
13 | struct softirq_action; | |
14 | ||
15 | #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq } | |
16 | #define show_softirq_name(val) \ | |
17 | __print_symbolic(val, \ | |
18 | softirq_name(HI), \ | |
19 | softirq_name(TIMER), \ | |
20 | softirq_name(NET_TX), \ | |
21 | softirq_name(NET_RX), \ | |
22 | softirq_name(BLOCK), \ | |
23 | softirq_name(BLOCK_IOPOLL), \ | |
24 | softirq_name(TASKLET), \ | |
25 | softirq_name(SCHED), \ | |
26 | softirq_name(HRTIMER), \ | |
27 | softirq_name(RCU)) | |
28 | ||
29 | #endif /* _TRACE_IRQ_DEF_ */ | |
30 | ||
31 | /** | |
32 | * irq_handler_entry - called immediately before the irq action handler | |
33 | * @irq: irq number | |
34 | * @action: pointer to struct irqaction | |
35 | * | |
36 | * The struct irqaction pointed to by @action contains various | |
37 | * information about the handler, including the device name, | |
38 | * @action->name, and the device id, @action->dev_id. When used in | |
39 | * conjunction with the irq_handler_exit tracepoint, we can figure | |
40 | * out irq handler latencies. | |
41 | */ | |
42 | TRACE_EVENT(irq_handler_entry, | |
43 | ||
44 | TP_PROTO(int irq, struct irqaction *action), | |
45 | ||
46 | TP_ARGS(irq, action), | |
47 | ||
48 | TP_STRUCT__entry( | |
49 | __field( int, irq ) | |
50 | __string( name, action->name ) | |
51 | ), | |
52 | ||
53 | TP_fast_assign( | |
54 | tp_assign(irq, irq) | |
55 | tp_strcpy(name, action->name) | |
56 | ), | |
57 | ||
58 | TP_printk("irq=%d name=%s", __entry->irq, __get_str(name)) | |
59 | ) | |
60 | ||
61 | /** | |
62 | * irq_handler_exit - called immediately after the irq action handler returns | |
63 | * @irq: irq number | |
64 | * @action: pointer to struct irqaction | |
65 | * @ret: return value | |
66 | * | |
67 | * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding | |
68 | * @action->handler scuccessully handled this irq. Otherwise, the irq might be | |
69 | * a shared irq line, or the irq was not handled successfully. Can be used in | |
70 | * conjunction with the irq_handler_entry to understand irq handler latencies. | |
71 | */ | |
72 | TRACE_EVENT(irq_handler_exit, | |
73 | ||
74 | TP_PROTO(int irq, struct irqaction *action, int ret), | |
75 | ||
76 | TP_ARGS(irq, action, ret), | |
77 | ||
78 | TP_STRUCT__entry( | |
79 | __field( int, irq ) | |
80 | __field( int, ret ) | |
81 | ), | |
82 | ||
83 | TP_fast_assign( | |
84 | tp_assign(irq, irq) | |
85 | tp_assign(ret, ret) | |
86 | ), | |
87 | ||
88 | TP_printk("irq=%d ret=%s", | |
89 | __entry->irq, __entry->ret ? "handled" : "unhandled") | |
90 | ) | |
91 | ||
92 | DECLARE_EVENT_CLASS(softirq, | |
93 | ||
94 | TP_PROTO(unsigned int vec_nr), | |
95 | ||
96 | TP_ARGS(vec_nr), | |
97 | ||
98 | TP_STRUCT__entry( | |
99 | __field( unsigned int, vec ) | |
100 | ), | |
101 | ||
102 | TP_fast_assign( | |
103 | tp_assign(vec, vec_nr) | |
104 | ), | |
105 | ||
106 | TP_printk("vec=%u [action=%s]", __entry->vec, | |
107 | show_softirq_name(__entry->vec)) | |
108 | ) | |
109 | ||
110 | /** | |
111 | * softirq_entry - called immediately before the softirq handler | |
112 | * @vec_nr: softirq vector number | |
113 | * | |
114 | * When used in combination with the softirq_exit tracepoint | |
115 | * we can determine the softirq handler runtine. | |
116 | */ | |
117 | DEFINE_EVENT(softirq, softirq_entry, | |
118 | ||
119 | TP_PROTO(unsigned int vec_nr), | |
120 | ||
121 | TP_ARGS(vec_nr) | |
122 | ) | |
123 | ||
124 | /** | |
125 | * softirq_exit - called immediately after the softirq handler returns | |
126 | * @vec_nr: softirq vector number | |
127 | * | |
128 | * When used in combination with the softirq_entry tracepoint | |
129 | * we can determine the softirq handler runtine. | |
130 | */ | |
131 | DEFINE_EVENT(softirq, softirq_exit, | |
132 | ||
133 | TP_PROTO(unsigned int vec_nr), | |
134 | ||
135 | TP_ARGS(vec_nr) | |
136 | ) | |
137 | ||
138 | /** | |
139 | * softirq_raise - called immediately when a softirq is raised | |
140 | * @vec_nr: softirq vector number | |
141 | * | |
142 | * When used in combination with the softirq_entry tracepoint | |
143 | * we can determine the softirq raise to run latency. | |
144 | */ | |
145 | DEFINE_EVENT(softirq, softirq_raise, | |
146 | ||
147 | TP_PROTO(unsigned int vec_nr), | |
148 | ||
149 | TP_ARGS(vec_nr) | |
150 | ) | |
151 | ||
152 | #endif /* _TRACE_IRQ_H */ | |
153 | ||
154 | /* This part must be outside protection */ | |
5b88d86e | 155 | #include "../../../probes/define_trace.h" |