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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: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Steven Rostedt 2009-05-20 19:56:19 -04:00 committed by Frederic Weisbecker
parent 0f4fc29dd6
commit c2adae0970
1 changed files with 17 additions and 6 deletions
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23
include/trace/events/irq.h
View File

@ -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 */