LXR linux/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
   9struct irqaction;
  10struct 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
  30SOFTIRQ_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 */
  52TRACE_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 successfully 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 */
  82TRACE_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
 102DECLARE_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 */
 127DEFINE_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 */
 141DEFINE_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 */
 155DEFINE_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>
 166