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trace: Modify timer_start and irq_handler_entry trace events. 

The timer_start event now shows whether the timer is
deferrable in case of a low-res timer. The debug_activate
function now includes deferrable flag while calling
trace_timer_start event. irq_handler_entry
event includes the ISR function in the trace event.

Change-Id: Ia2eeb4fa0fae34b301964144dad8bcef7632487c
Signed-off-by: Badhri Jagan Sridharan <badhris@codeaurora.org>
(cherry picked from commit a2cd6eaf5deaa40098eb6b692797519bc173381e)
This commit is contained in:
Badhri Jagan Sridharan 2012-07-18 15:46:01 -07:00 committed by Stephen Boyd
parent f9c5c04903
commit 77202e52b3
3 changed files with 13 additions and 6 deletions
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5
include/trace/events/irq.h
View File

@ -43,14 +43,17 @@ TRACE_EVENT(irq_handler_entry,
TP_STRUCT__entry(
__field( int, irq )
__string( name, action->name )
__field(void*, handler)
),
TP_fast_assign(
__entry->irq = irq;
__assign_str(name, action->name);
__entry->handler = action->handler;
),
TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
TP_printk("irq=%d name=%s handler=%pf",
__entry->irq, __get_str(name), __entry->handler)
);
/**

11
include/trace/events/timer.h
View File

@ -43,15 +43,17 @@ DEFINE_EVENT(timer_class, timer_init,
*/
TRACE_EVENT(timer_start,
TP_PROTO(struct timer_list *timer, unsigned long expires),
TP_PROTO(struct timer_list *timer,
unsigned long expires, char deferrable),
TP_ARGS(timer, expires),
TP_ARGS(timer, expires, deferrable),
TP_STRUCT__entry(
__field( void *, timer )
__field( void *, function )
__field( unsigned long, expires )
__field( unsigned long, now )
__field(char, deferrable)
),
TP_fast_assign(
@ -59,11 +61,12 @@ TRACE_EVENT(timer_start,
__entry->function = timer->function;
__entry->expires = expires;
__entry->now = jiffies;
__entry->deferrable = deferrable;
),
TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld]",
TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] defer=%c",
__entry->timer, __entry->function, __entry->expires,
(long)__entry->expires - __entry->now)
(long)__entry->expires - __entry->now, __entry->deferrable)
);
/**

3
kernel/timer.c
View File

@ -602,7 +602,8 @@ static inline void
debug_activate(struct timer_list *timer, unsigned long expires)
{
debug_timer_activate(timer);
trace_timer_start(timer, expires);
trace_timer_start(timer, expires,
tbase_get_deferrable(timer->base) > 0 ? 'y' : 'n');
}
static inline void debug_deactivate(struct timer_list *timer)