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Commit c2adae09 authored by Steven Rostedt's avatar Steven Rostedt Committed by Frederic Weisbecker
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tracing: convert irq events to use __print_symbolic 



The recording of the names at trace time is inefficient. This patch
implements the softirq event recording to only record the vector
and then use the __print_symbolic interface to print out the names.

[ Impact: faster recording of softirq events ]

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
parent 0f4fc29d

include/trace/events/irq.h

+17 −6
Original line number Diff line number Diff line
@@ -7,6 +7,19 @@ 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM irq



#define softirq_name(sirq) { sirq, #sirq }

#define show_softirq_name(val)						\

	__print_symbolic(val,						\

			 softirq_name(HI_SOFTIRQ),			\

			 softirq_name(TIMER_SOFTIRQ),			\

			 softirq_name(NET_TX_SOFTIRQ),			\

			 softirq_name(NET_RX_SOFTIRQ),			\

			 softirq_name(BLOCK_SOFTIRQ),			\

			 softirq_name(TASKLET_SOFTIRQ),			\

			 softirq_name(SCHED_SOFTIRQ),			\

			 softirq_name(HRTIMER_SOFTIRQ),			\

			 softirq_name(RCU_SOFTIRQ))



/**

 * irq_handler_entry - called immediately before the irq action handler

 * @irq: irq number
@@ -87,15 +100,14 @@ TRACE_EVENT(softirq_entry, 


	TP_STRUCT__entry(

		__field(	int,	vec			)

		__string(	name,	softirq_to_name[h-vec]	)

	),



	TP_fast_assign(

		__entry->vec = (int)(h - vec);

		__assign_str(name, softirq_to_name[h-vec]);

	),



	TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name))

	TP_printk("softirq=%d action=%s", __entry->vec,

		  show_softirq_name(__entry->vec))

);



/**
@@ -117,15 +129,14 @@ TRACE_EVENT(softirq_exit, 


	TP_STRUCT__entry(

		__field(	int,	vec			)

		__string(	name,	softirq_to_name[h-vec]	)

	),



	TP_fast_assign(

		__entry->vec = (int)(h - vec);

		__assign_str(name, softirq_to_name[h-vec]);

	),



	TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name))

	TP_printk("softirq=%d action=%s", __entry->vec,

		  show_softirq_name(__entry->vec))

);



#endif /*  _TRACE_IRQ_H */