instrumentation/events/lttng-module/irq.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM irq
   3
   4 #if !defined(LTTNG_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define LTTNG_TRACE_IRQ_H
   6
   7 #include "../../../probes/lttng-tracepoint-event.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 LTTNG_TRACEPOINT_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 LTTNG_TRACEPOINT_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 LTTNG_TRACEPOINT_EVENT_CLASS(irq_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 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_entry,
 119
 120         irq_softirq_entry,
 121
 122         TP_PROTO(unsigned int vec_nr),
 123
 124         TP_ARGS(vec_nr)
 125 )
 126
 127 /**
 128  * softirq_exit - called immediately after the softirq handler returns
 129  * @vec_nr:  softirq vector number
 130  *
 131  * When used in combination with the softirq_entry tracepoint
 132  * we can determine the softirq handler runtine.
 133  */
 134 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_exit,
 135
 136         irq_softirq_exit,
 137
 138         TP_PROTO(unsigned int vec_nr),
 139
 140         TP_ARGS(vec_nr)
 141 )
 142
 143 /**
 144  * softirq_raise - called immediately when a softirq is raised
 145  * @vec_nr:  softirq vector number
 146  *
 147  * When used in combination with the softirq_entry tracepoint
 148  * we can determine the softirq raise to run latency.
 149  */
 150 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_raise,
 151
 152         irq_softirq_raise,
 153
 154         TP_PROTO(unsigned int vec_nr),
 155
 156         TP_ARGS(vec_nr)
 157 )
 158 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
 159 LTTNG_TRACEPOINT_EVENT_CLASS(irq_softirq,
 160
 161         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 162
 163         TP_ARGS(h, vec),
 164
 165         TP_STRUCT__entry(
 166                 __field(        unsigned int,   vec     )
 167         ),
 168
 169         TP_fast_assign(
 170                 tp_assign(vec, (int)(h - vec))
 171         ),
 172
 173         TP_printk("vec=%u [action=%s]", __entry->vec,
 174                   show_softirq_name(__entry->vec))
 175 )
 176
 177 /**
 178  * softirq_entry - called immediately before the softirq handler
 179  * @h: pointer to struct softirq_action
 180  * @vec: pointer to first struct softirq_action in softirq_vec array
 181  *
 182  * When used in combination with the softirq_exit tracepoint
 183  * we can determine the softirq handler runtine.
 184  */
 185 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_entry,
 186
 187         irq_softirq_entry,
 188
 189         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 190
 191         TP_ARGS(h, vec)
 192 )
 193
 194 /**
 195  * softirq_exit - called immediately after the softirq handler returns
 196  * @h: pointer to struct softirq_action
 197  * @vec: pointer to first struct softirq_action in softirq_vec array
 198  *
 199  * When used in combination with the softirq_entry tracepoint
 200  * we can determine the softirq handler runtine.
 201  */
 202 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_exit,
 203
 204         irq_softirq_exit,
 205
 206         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 207
 208         TP_ARGS(h, vec)
 209 )
 210
 211 /**
 212  * softirq_raise - called immediately when a softirq is raised
 213  * @h: pointer to struct softirq_action
 214  * @vec: pointer to first struct softirq_action in softirq_vec array
 215  *
 216  * When used in combination with the softirq_entry tracepoint
 217  * we can determine the softirq raise to run latency.
 218  */
 219 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(irq_softirq, softirq_raise,
 220
 221         irq_softirq_raise,
 222
 223         TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
 224
 225         TP_ARGS(h, vec)
 226 )
 227 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
 228
 229 #endif /*  LTTNG_TRACE_IRQ_H */
 230
 231 /* This part must be outside protection */
 232 #include "../../../probes/define_trace.h"