include/trace/events/irq.h

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