2 #define TRACE_SYSTEM irq
4 #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
7 #include <linux/tracepoint.h>
8 #include <linux/interrupt.h>
10 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
11 #define show_softirq_name(val) \
12 __print_symbolic(val, \
14 softirq_name(TIMER), \
15 softirq_name(NET_TX), \
16 softirq_name(NET_RX), \
17 softirq_name(BLOCK), \
18 softirq_name(BLOCK_IOPOLL), \
19 softirq_name(TASKLET), \
20 softirq_name(SCHED), \
21 softirq_name(HRTIMER), \
25 * irq_handler_entry - called immediately before the irq action handler
27 * @action: pointer to struct irqaction
29 * The struct irqaction pointed to by @action contains various
30 * information about the handler, including the device name,
31 * @action->name, and the device id, @action->dev_id. When used in
32 * conjunction with the irq_handler_exit tracepoint, we can figure
33 * out irq handler latencies.
35 TRACE_EVENT(irq_handler_entry,
37 TP_PROTO(int irq, struct irqaction *action),
43 __string( name, action->name )
48 __assign_str(name, action->name);
51 TP_printk("irq=%d handler=%s", __entry->irq, __get_str(name))
55 * irq_handler_exit - called immediately after the irq action handler returns
57 * @action: pointer to struct irqaction
60 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
61 * @action->handler scuccessully handled this irq. Otherwise, the irq might be
62 * a shared irq line, or the irq was not handled successfully. Can be used in
63 * conjunction with the irq_handler_entry to understand irq handler latencies.
65 TRACE_EVENT(irq_handler_exit,
67 TP_PROTO(int irq, struct irqaction *action, int ret),
69 TP_ARGS(irq, action, ret),
81 TP_printk("irq=%d return=%s",
82 __entry->irq, __entry->ret ? "handled" : "unhandled")
86 * softirq_entry - called immediately before the softirq handler
87 * @h: pointer to struct softirq_action
88 * @vec: pointer to first struct softirq_action in softirq_vec array
90 * The @h parameter, contains a pointer to the struct softirq_action
91 * which has a pointer to the action handler that is called. By subtracting
92 * the @vec pointer from the @h pointer, we can determine the softirq
93 * number. Also, when used in combination with the softirq_exit tracepoint
94 * we can determine the softirq latency.
96 TRACE_EVENT(softirq_entry,
98 TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
107 __entry->vec = (int)(h - vec);
110 TP_printk("softirq=%d action=%s", __entry->vec,
111 show_softirq_name(__entry->vec))
115 * softirq_exit - called immediately after the softirq handler returns
116 * @h: pointer to struct softirq_action
117 * @vec: pointer to first struct softirq_action in softirq_vec array
119 * The @h parameter contains a pointer to the struct softirq_action
120 * that has handled the softirq. By subtracting the @vec pointer from
121 * the @h pointer, we can determine the softirq number. Also, when used in
122 * combination with the softirq_entry tracepoint we can determine the softirq
125 TRACE_EVENT(softirq_exit,
127 TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
136 __entry->vec = (int)(h - vec);
139 TP_printk("softirq=%d action=%s", __entry->vec,
140 show_softirq_name(__entry->vec))
143 #endif /* _TRACE_IRQ_H */
145 /* This part must be outside protection */
146 #include <trace/define_trace.h>