Commit | Line | Data |
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d0b6e04a LZ |
1 | #undef TRACE_SYSTEM |
2 | #define TRACE_SYSTEM irq | |
3 | ||
ea20d929 | 4 | #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ) |
af39241b JB |
5 | #define _TRACE_IRQ_H |
6 | ||
af39241b | 7 | #include <linux/tracepoint.h> |
ea20d929 SR |
8 | #include <linux/interrupt.h> |
9 | ||
1d080d6c SR |
10 | #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq } |
11 | #define show_softirq_name(val) \ | |
12 | __print_symbolic(val, \ | |
13 | softirq_name(HI), \ | |
14 | softirq_name(TIMER), \ | |
15 | softirq_name(NET_TX), \ | |
16 | softirq_name(NET_RX), \ | |
17 | softirq_name(BLOCK), \ | |
18 | softirq_name(TASKLET), \ | |
19 | softirq_name(SCHED), \ | |
20 | softirq_name(HRTIMER), \ | |
21 | softirq_name(RCU)) | |
c2adae09 | 22 | |
9ee1983c JB |
23 | /** |
24 | * irq_handler_entry - called immediately before the irq action handler | |
25 | * @irq: irq number | |
26 | * @action: pointer to struct irqaction | |
27 | * | |
28 | * The struct irqaction pointed to by @action contains various | |
29 | * information about the handler, including the device name, | |
30 | * @action->name, and the device id, @action->dev_id. When used in | |
31 | * conjunction with the irq_handler_exit tracepoint, we can figure | |
32 | * out irq handler latencies. | |
ea20d929 | 33 | */ |
160031b5 SR |
34 | TRACE_EVENT(irq_handler_entry, |
35 | ||
ea20d929 | 36 | TP_PROTO(int irq, struct irqaction *action), |
160031b5 | 37 | |
ea20d929 | 38 | TP_ARGS(irq, action), |
160031b5 SR |
39 | |
40 | TP_STRUCT__entry( | |
41 | __field( int, irq ) | |
42 | __string( name, action->name ) | |
43 | ), | |
44 | ||
45 | TP_fast_assign( | |
46 | __entry->irq = irq; | |
47 | __assign_str(name, action->name); | |
48 | ), | |
49 | ||
50 | TP_printk("irq=%d handler=%s", __entry->irq, __get_str(name)) | |
51 | ); | |
ea20d929 | 52 | |
9ee1983c JB |
53 | /** |
54 | * irq_handler_exit - called immediately after the irq action handler returns | |
55 | * @irq: irq number | |
56 | * @action: pointer to struct irqaction | |
57 | * @ret: return value | |
58 | * | |
59 | * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding | |
60 | * @action->handler scuccessully handled this irq. Otherwise, the irq might be | |
61 | * a shared irq line, or the irq was not handled successfully. Can be used in | |
62 | * conjunction with the irq_handler_entry to understand irq handler latencies. | |
ea20d929 SR |
63 | */ |
64 | TRACE_EVENT(irq_handler_exit, | |
65 | ||
66 | TP_PROTO(int irq, struct irqaction *action, int ret), | |
67 | ||
68 | TP_ARGS(irq, action, ret), | |
69 | ||
70 | TP_STRUCT__entry( | |
71 | __field( int, irq ) | |
72 | __field( int, ret ) | |
73 | ), | |
74 | ||
75 | TP_fast_assign( | |
76 | __entry->irq = irq; | |
77 | __entry->ret = ret; | |
78 | ), | |
79 | ||
80 | TP_printk("irq=%d return=%s", | |
81 | __entry->irq, __entry->ret ? "handled" : "unhandled") | |
82 | ); | |
83 | ||
9ee1983c JB |
84 | /** |
85 | * softirq_entry - called immediately before the softirq handler | |
86 | * @h: pointer to struct softirq_action | |
87 | * @vec: pointer to first struct softirq_action in softirq_vec array | |
88 | * | |
89 | * The @h parameter, contains a pointer to the struct softirq_action | |
90 | * which has a pointer to the action handler that is called. By subtracting | |
91 | * the @vec pointer from the @h pointer, we can determine the softirq | |
92 | * number. Also, when used in combination with the softirq_exit tracepoint | |
93 | * we can determine the softirq latency. | |
94 | */ | |
160031b5 SR |
95 | TRACE_EVENT(softirq_entry, |
96 | ||
ea20d929 | 97 | TP_PROTO(struct softirq_action *h, struct softirq_action *vec), |
160031b5 | 98 | |
ea20d929 | 99 | TP_ARGS(h, vec), |
af39241b | 100 | |
160031b5 SR |
101 | TP_STRUCT__entry( |
102 | __field( int, vec ) | |
160031b5 SR |
103 | ), |
104 | ||
105 | TP_fast_assign( | |
106 | __entry->vec = (int)(h - vec); | |
160031b5 SR |
107 | ), |
108 | ||
c2adae09 SR |
109 | TP_printk("softirq=%d action=%s", __entry->vec, |
110 | show_softirq_name(__entry->vec)) | |
160031b5 SR |
111 | ); |
112 | ||
9ee1983c JB |
113 | /** |
114 | * softirq_exit - called immediately after the softirq handler returns | |
115 | * @h: pointer to struct softirq_action | |
116 | * @vec: pointer to first struct softirq_action in softirq_vec array | |
117 | * | |
118 | * The @h parameter contains a pointer to the struct softirq_action | |
119 | * that has handled the softirq. By subtracting the @vec pointer from | |
120 | * the @h pointer, we can determine the softirq number. Also, when used in | |
121 | * combination with the softirq_entry tracepoint we can determine the softirq | |
122 | * latency. | |
123 | */ | |
160031b5 SR |
124 | TRACE_EVENT(softirq_exit, |
125 | ||
ea20d929 | 126 | TP_PROTO(struct softirq_action *h, struct softirq_action *vec), |
160031b5 | 127 | |
ea20d929 | 128 | TP_ARGS(h, vec), |
160031b5 SR |
129 | |
130 | TP_STRUCT__entry( | |
131 | __field( int, vec ) | |
160031b5 SR |
132 | ), |
133 | ||
134 | TP_fast_assign( | |
135 | __entry->vec = (int)(h - vec); | |
160031b5 SR |
136 | ), |
137 | ||
c2adae09 SR |
138 | TP_printk("softirq=%d action=%s", __entry->vec, |
139 | show_softirq_name(__entry->vec)) | |
160031b5 | 140 | ); |
af39241b | 141 | |
a8d154b0 SR |
142 | #endif /* _TRACE_IRQ_H */ |
143 | ||
144 | /* This part must be outside protection */ | |
145 | #include <trace/define_trace.h> |