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 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
  93 DECLARE_EVENT_CLASS(softirq,
  94
  95         TP_PROTO(unsigned int vec_nr),
  96
  97         TP_ARGS(vec_nr),
  98
  99         TP_STRUCT__entry(
 100                 __field(        unsigned int,   vec     )
 101         ),
 102
 103         TP_fast_assign(
 104                 tp_assign(vec, vec_nr)
 105         ),
 106
 107         TP_printk("vec=%u [action=%s]", __entry->vec,
 108                   show_softirq_name(__entry->vec))
 109 )
 110
 111 /**
 112  * softirq_entry - called immediately before the softirq handler
 113  * @vec_nr:  softirq vector number
 114  *
 115  * When used in combination with the softirq_exit tracepoint
 116  * we can determine the softirq handler runtine.
 117  */
 118 DEFINE_EVENT(softirq, softirq_entry,
 119
 120         TP_PROTO(unsigned int vec_nr),
 121
 122         TP_ARGS(vec_nr)
 123 )
 124
 125 /**
 126  * softirq_exit - called immediately after the softirq handler returns
 127  * @vec_nr:  softirq vector number
 128  *
 129  * When used in combination with the softirq_entry tracepoint
 130  * we can determine the softirq handler runtine.
 131  */
 132 DEFINE_EVENT(softirq, softirq_exit,
 133
 134         TP_PROTO(unsigned int vec_nr),
 135
 136         TP_ARGS(vec_nr)
 137 )
 138
 139 /**
 140  * softirq_raise - called immediately when a softirq is raised
 141  * @vec_nr:  softirq vector number
 142  *
 143  * When used in combination with the softirq_entry tracepoint
 144  * we can determine the softirq raise to run latency.
 145  */
 146 DEFINE_EVENT(softirq, softirq_raise,
 147
 148         TP_PROTO(unsigned int vec_nr),
 149
 150         TP_ARGS(vec_nr)
 151 )
 152 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
 153 DECLARE_EVENT_CLASS(softirq,
 154
 155         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 156
 157         TP_ARGS(h, vec),
 158
 159         TP_STRUCT__entry(
 160                 __field(        unsigned int,   vec     )
 161         ),
 162
 163         TP_fast_assign(
 164                 tp_assign(vec, (int)(h - vec))
 165         ),
 166
 167         TP_printk("vec=%u [action=%s]", __entry->vec,
 168                   show_softirq_name(__entry->vec))
 169 )
 170
 171 /**
 172  * softirq_entry - called immediately before the softirq handler
 173  * @h: pointer to struct softirq_action
 174  * @vec: pointer to first struct softirq_action in softirq_vec array
 175  *
 176  * When used in combination with the softirq_exit tracepoint
 177  * we can determine the softirq handler runtine.
 178  */
 179 DEFINE_EVENT(softirq, softirq_entry,
 180
 181         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 182
 183         TP_ARGS(h, vec)
 184 )
 185
 186 /**
 187  * softirq_exit - called immediately after the softirq handler returns
 188  * @h: pointer to struct softirq_action
 189  * @vec: pointer to first struct softirq_action in softirq_vec array
 190  *
 191  * When used in combination with the softirq_entry tracepoint
 192  * we can determine the softirq handler runtine.
 193  */
 194 DEFINE_EVENT(softirq, softirq_exit,
 195
 196         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 197
 198         TP_ARGS(h, vec)
 199 )
 200
 201 /**
 202  * softirq_raise - called immediately when a softirq is raised
 203  * @h: pointer to struct softirq_action
 204  * @vec: pointer to first struct softirq_action in softirq_vec array
 205  *
 206  * When used in combination with the softirq_entry tracepoint
 207  * we can determine the softirq raise to run latency.
 208  */
 209 DEFINE_EVENT(softirq, softirq_raise,
 210
 211         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 212
 213         TP_ARGS(h, vec)
 214 )
 215 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
 216
 217 #endif /*  _TRACE_IRQ_H */
 218
 219 /* This part must be outside protection */
 220 #include "../../../probes/define_trace.h"