154 lines
3.5 KiB
C
154 lines
3.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM irq
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#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_IRQ_H
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#include <linux/tracepoint.h>
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struct irqaction;
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struct softirq_action;
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#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
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#define show_softirq_name(val) \
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__print_symbolic(val, \
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softirq_name(HI), \
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softirq_name(TIMER), \
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softirq_name(NET_TX), \
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softirq_name(NET_RX), \
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softirq_name(BLOCK), \
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softirq_name(BLOCK_IOPOLL), \
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softirq_name(TASKLET), \
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softirq_name(SCHED), \
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softirq_name(HRTIMER), \
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softirq_name(RCU))
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/**
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* irq_handler_entry - called immediately before the irq action handler
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* @irq: irq number
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* @action: pointer to struct irqaction
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*
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* The struct irqaction pointed to by @action contains various
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* information about the handler, including the device name,
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* @action->name, and the device id, @action->dev_id. When used in
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* conjunction with the irq_handler_exit tracepoint, we can figure
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* out irq handler latencies.
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*/
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TRACE_EVENT(irq_handler_entry,
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TP_PROTO(int irq, struct irqaction *action),
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TP_ARGS(irq, action),
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TP_STRUCT__entry(
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__field( int, irq )
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__string( name, action->name )
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__field(void*, handler)
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),
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TP_fast_assign(
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__entry->irq = irq;
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__assign_str(name, action->name);
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__entry->handler = action->handler;
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),
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TP_printk("irq=%d name=%s handler=%pf",
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__entry->irq, __get_str(name), __entry->handler)
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);
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/**
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* irq_handler_exit - called immediately after the irq action handler returns
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* @irq: irq number
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* @action: pointer to struct irqaction
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* @ret: return value
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*
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* If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
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* @action->handler scuccessully handled this irq. Otherwise, the irq might be
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* a shared irq line, or the irq was not handled successfully. Can be used in
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* conjunction with the irq_handler_entry to understand irq handler latencies.
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*/
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TRACE_EVENT(irq_handler_exit,
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TP_PROTO(int irq, struct irqaction *action, int ret),
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TP_ARGS(irq, action, ret),
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TP_STRUCT__entry(
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__field( int, irq )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->irq = irq;
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__entry->ret = ret;
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),
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TP_printk("irq=%d ret=%s",
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__entry->irq, __entry->ret ? "handled" : "unhandled")
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);
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DECLARE_EVENT_CLASS(softirq,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr),
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TP_STRUCT__entry(
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__field( unsigned int, vec )
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),
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TP_fast_assign(
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__entry->vec = vec_nr;
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),
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TP_printk("vec=%u [action=%s]", __entry->vec,
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show_softirq_name(__entry->vec))
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);
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/**
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* softirq_entry - called immediately before the softirq handler
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_exit tracepoint
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* we can determine the softirq handler runtine.
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*/
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DEFINE_EVENT(softirq, softirq_entry,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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/**
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* softirq_exit - called immediately after the softirq handler returns
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_entry tracepoint
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* we can determine the softirq handler runtine.
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*/
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DEFINE_EVENT(softirq, softirq_exit,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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/**
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* softirq_raise - called immediately when a softirq is raised
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_entry tracepoint
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* we can determine the softirq raise to run latency.
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*/
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DEFINE_EVENT(softirq, softirq_raise,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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#endif /* _TRACE_IRQ_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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