forked from Minki/linux
f4bc6bb2d5
With the addition of trace_softirq_raise() the softirq tracepoint got even more convoluted. Why the tracepoints take two pointers to assign an integer is beyond my comprehension. But adding an extra case which treats the first pointer as an unsigned long when the second pointer is NULL including the back and forth type casting is just horrible. Convert the softirq tracepoints to take a single unsigned int argument for the softirq vector number and fix the call sites. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <alpine.LFD.2.00.1010191428560.6815@localhost6.localdomain6> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: mathieu.desnoyers@efficios.com Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org>
151 lines
3.4 KiB
C
151 lines
3.4 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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),
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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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),
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TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
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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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