Commit c467307c authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar
Browse files

tracing: Convert softirq events to DEFINE_EVENT 



Use DECLARE_EVENT_CLASS to remove duplicate code:

   text    data     bss     dec     hex filename
  12781     952      36   13769    35c9 kernel/softirq.o.old
  11981     952      32   12965    32a5 kernel/softirq.o

Two events are converted:

  softirq: softirq_entry, softirq_exit

No change in functionality.

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B0E287F.4030708@cn.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 53d0422c

include/trace/events/irq.h

+21 −25
Original line number Diff line number Diff line
@@ -82,18 +82,7 @@ TRACE_EVENT(irq_handler_exit, 
		  __entry->irq, __entry->ret ? "handled" : "unhandled")

);



/**

 * softirq_entry - called immediately before the softirq handler

 * @h: pointer to struct softirq_action

 * @vec: pointer to first struct softirq_action in softirq_vec array

 *

 * The @h parameter, contains a pointer to the struct softirq_action

 * which has a pointer to the action handler that is called. By subtracting

 * the @vec pointer from the @h pointer, we can determine the softirq

 * number. Also, when used in combination with the softirq_exit tracepoint

 * we can determine the softirq latency.

 */

TRACE_EVENT(softirq_entry,

DECLARE_EVENT_CLASS(softirq,



	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
@@ -111,6 +100,24 @@ TRACE_EVENT(softirq_entry, 
		  show_softirq_name(__entry->vec))

);



/**

 * softirq_entry - called immediately before the softirq handler

 * @h: pointer to struct softirq_action

 * @vec: pointer to first struct softirq_action in softirq_vec array

 *

 * The @h parameter, contains a pointer to the struct softirq_action

 * which has a pointer to the action handler that is called. By subtracting

 * the @vec pointer from the @h pointer, we can determine the softirq

 * number. Also, when used in combination with the softirq_exit tracepoint

 * we can determine the softirq latency.

 */

DEFINE_EVENT(softirq, softirq_entry,



	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),



	TP_ARGS(h, vec)

);



/**

 * softirq_exit - called immediately after the softirq handler returns

 * @h: pointer to struct softirq_action
@@ -122,22 +129,11 @@ TRACE_EVENT(softirq_entry, 
 * combination with the softirq_entry tracepoint we can determine the softirq

 * latency.

 */

TRACE_EVENT(softirq_exit,

DEFINE_EVENT(softirq, softirq_exit,



	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),



	TP_ARGS(h, vec),



	TP_STRUCT__entry(

		__field(	int,	vec			)

	),



	TP_fast_assign(

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

	),



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

		  show_softirq_name(__entry->vec))

	TP_ARGS(h, vec)

);



#endif /*  _TRACE_IRQ_H */

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