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