instrumentation/events/lttng-module/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 #ifndef _TRACE_IRQ_DEF_
  10 #define _TRACE_IRQ_DEF_
  11
  12 struct irqaction;
  13 struct softirq_action;
  14
  15 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
  16 #define show_softirq_name(val)                          \
  17         __print_symbolic(val,                           \
  18                          softirq_name(HI),              \
  19                          softirq_name(TIMER),           \
  20                          softirq_name(NET_TX),          \
  21                          softirq_name(NET_RX),          \
  22                          softirq_name(BLOCK),           \
  23                          softirq_name(BLOCK_IOPOLL),    \
  24                          softirq_name(TASKLET),         \
  25                          softirq_name(SCHED),           \
  26                          softirq_name(HRTIMER),         \
  27                          softirq_name(RCU))
  28
  29 #endif /* _TRACE_IRQ_DEF_ */
  30
  31 /**
  32  * irq_handler_entry - called immediately before the irq action handler
  33  * @irq: irq number
  34  * @action: pointer to struct irqaction
  35  *
  36  * The struct irqaction pointed to by @action contains various
  37  * information about the handler, including the device name,
  38  * @action->name, and the device id, @action->dev_id. When used in
  39  * conjunction with the irq_handler_exit tracepoint, we can figure
  40  * out irq handler latencies.
  41  */
  42 TRACE_EVENT(irq_handler_entry,
  43
  44         TP_PROTO(int irq, struct irqaction *action),
  45
  46         TP_ARGS(irq, action),
  47
  48         TP_STRUCT__entry(
  49                 __field(        int,    irq             )
  50                 __string(       name,   action->name    )
  51         ),
  52
  53         TP_fast_assign(
  54                 tp_assign(irq, irq)
  55                 tp_strcpy(name, action->name)
  56         ),
  57
  58         TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
  59 )
  60
  61 /**
  62  * irq_handler_exit - called immediately after the irq action handler returns
  63  * @irq: irq number
  64  * @action: pointer to struct irqaction
  65  * @ret: return value
  66  *
  67  * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
  68  * @action->handler scuccessully handled this irq. Otherwise, the irq might be
  69  * a shared irq line, or the irq was not handled successfully. Can be used in
  70  * conjunction with the irq_handler_entry to understand irq handler latencies.
  71  */
  72 TRACE_EVENT(irq_handler_exit,
  73
  74         TP_PROTO(int irq, struct irqaction *action, int ret),
  75
  76         TP_ARGS(irq, action, ret),
  77
  78         TP_STRUCT__entry(
  79                 __field(        int,    irq     )
  80                 __field(        int,    ret     )
  81         ),
  82
  83         TP_fast_assign(
  84                 tp_assign(irq, irq)
  85                 tp_assign(ret, ret)
  86         ),
  87
  88         TP_printk("irq=%d ret=%s",
  89                   __entry->irq, __entry->ret ? "handled" : "unhandled")
  90 )
  91
  92 DECLARE_EVENT_CLASS(softirq,
  93
  94         TP_PROTO(unsigned int vec_nr),
  95
  96         TP_ARGS(vec_nr),
  97
  98         TP_STRUCT__entry(
  99                 __field(        unsigned int,   vec     )
 100         ),
 101
 102         TP_fast_assign(
 103                 tp_assign(vec, vec_nr)
 104         ),
 105
 106         TP_printk("vec=%u [action=%s]", __entry->vec,
 107                   show_softirq_name(__entry->vec))
 108 )
 109
 110 /**
 111  * softirq_entry - called immediately before the softirq handler
 112  * @vec_nr:  softirq vector number
 113  *
 114  * When used in combination with the softirq_exit tracepoint
 115  * we can determine the softirq handler runtine.
 116  */
 117 DEFINE_EVENT(softirq, softirq_entry,
 118
 119         TP_PROTO(unsigned int vec_nr),
 120
 121         TP_ARGS(vec_nr)
 122 )
 123
 124 /**
 125  * softirq_exit - called immediately after the softirq handler returns
 126  * @vec_nr:  softirq vector number
 127  *
 128  * When used in combination with the softirq_entry tracepoint
 129  * we can determine the softirq handler runtine.
 130  */
 131 DEFINE_EVENT(softirq, softirq_exit,
 132
 133         TP_PROTO(unsigned int vec_nr),
 134
 135         TP_ARGS(vec_nr)
 136 )
 137
 138 /**
 139  * softirq_raise - called immediately when a softirq is raised
 140  * @vec_nr:  softirq vector number
 141  *
 142  * When used in combination with the softirq_entry tracepoint
 143  * we can determine the softirq raise to run latency.
 144  */
 145 DEFINE_EVENT(softirq, softirq_raise,
 146
 147         TP_PROTO(unsigned int vec_nr),
 148
 149         TP_ARGS(vec_nr)
 150 )
 151
 152 #endif /*  _TRACE_IRQ_H */
 153
 154 /* This part must be outside protection */
 155 #include "../../../probes/define_trace.h"