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_LIST                               \
  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(IRQ_POLL)         \
  19                          softirq_name(TASKLET)          \
  20                          softirq_name(SCHED)            \
  21                          softirq_name(HRTIMER)          \
  22                          softirq_name_end(RCU)
  23
  24 #undef softirq_name
  25 #undef softirq_name_end
  26
  27 #define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
  28 #define softirq_name_end(sirq)  TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
  29
  30 SOFTIRQ_NAME_LIST
  31
  32 #undef softirq_name
  33 #undef softirq_name_end
  34
  35 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
  36 #define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
  37
  38 #define show_softirq_name(val)                          \
  39         __print_symbolic(val, SOFTIRQ_NAME_LIST)
  40
  41 /**
  42  * irq_handler_entry - called immediately before the irq action handler
  43  * @irq: irq number
  44  * @action: pointer to struct irqaction
  45  *
  46  * The struct irqaction pointed to by @action contains various
  47  * information about the handler, including the device name,
  48  * @action->name, and the device id, @action->dev_id. When used in
  49  * conjunction with the irq_handler_exit tracepoint, we can figure
  50  * out irq handler latencies.
  51  */
  52 TRACE_EVENT(irq_handler_entry,
  53
  54         TP_PROTO(int irq, struct irqaction *action),
  55
  56         TP_ARGS(irq, action),
  57
  58         TP_STRUCT__entry(
  59                 __field(        int,    irq             )
  60                 __string(       name,   action->name    )
  61         ),
  62
  63         TP_fast_assign(
  64                 __entry->irq = irq;
  65                 __assign_str(name, action->name);
  66         ),
  67
  68         TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
  69 );
  70
  71 /**
  72  * irq_handler_exit - called immediately after the irq action handler returns
  73  * @irq: irq number
  74  * @action: pointer to struct irqaction
  75  * @ret: return value
  76  *
  77  * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
  78  * @action->handler scuccessully handled this irq. Otherwise, the irq might be
  79  * a shared irq line, or the irq was not handled successfully. Can be used in
  80  * conjunction with the irq_handler_entry to understand irq handler latencies.
  81  */
  82 TRACE_EVENT(irq_handler_exit,
  83
  84         TP_PROTO(int irq, struct irqaction *action, int ret),
  85
  86         TP_ARGS(irq, action, ret),
  87
  88         TP_STRUCT__entry(
  89                 __field(        int,    irq     )
  90                 __field(        int,    ret     )
  91         ),
  92
  93         TP_fast_assign(
  94                 __entry->irq    = irq;
  95                 __entry->ret    = ret;
  96         ),
  97
  98         TP_printk("irq=%d ret=%s",
  99                   __entry->irq, __entry->ret ? "handled" : "unhandled")
 100 );
 101
 102 DECLARE_EVENT_CLASS(softirq,
 103
 104         TP_PROTO(unsigned int vec_nr),
 105
 106         TP_ARGS(vec_nr),
 107
 108         TP_STRUCT__entry(
 109                 __field(        unsigned int,   vec     )
 110         ),
 111
 112         TP_fast_assign(
 113                 __entry->vec = vec_nr;
 114         ),
 115
 116         TP_printk("vec=%u [action=%s]", __entry->vec,
 117                   show_softirq_name(__entry->vec))
 118 );
 119
 120 /**
 121  * softirq_entry - called immediately before the softirq handler
 122  * @vec_nr:  softirq vector number
 123  *
 124  * When used in combination with the softirq_exit tracepoint
 125  * we can determine the softirq handler routine.
 126  */
 127 DEFINE_EVENT(softirq, softirq_entry,
 128
 129         TP_PROTO(unsigned int vec_nr),
 130
 131         TP_ARGS(vec_nr)
 132 );
 133
 134 /**
 135  * softirq_exit - called immediately after the softirq handler returns
 136  * @vec_nr:  softirq vector number
 137  *
 138  * When used in combination with the softirq_entry tracepoint
 139  * we can determine the softirq handler routine.
 140  */
 141 DEFINE_EVENT(softirq, softirq_exit,
 142
 143         TP_PROTO(unsigned int vec_nr),
 144
 145         TP_ARGS(vec_nr)
 146 );
 147
 148 /**
 149  * softirq_raise - called immediately when a softirq is raised
 150  * @vec_nr:  softirq vector number
 151  *
 152  * When used in combination with the softirq_entry tracepoint
 153  * we can determine the softirq raise to run latency.
 154  */
 155 DEFINE_EVENT(softirq, softirq_raise,
 156
 157         TP_PROTO(unsigned int vec_nr),
 158
 159         TP_ARGS(vec_nr)
 160 );
 161
 162 #endif /*  _TRACE_IRQ_H */
 163
 164 /* This part must be outside protection */
 165 #include <trace/define_trace.h>