lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

itimers: Add tracepoints for itimer

Browse Source 
Add tracepoints for all itimer variants: ITIMER_REAL, ITIMER_VIRTUAL
and ITIMER_PROF.

[ tglx: Fixed comments and made the output more readable, parseable
  	and consistent. Replaced pid_vnr by pid_nr because the hrtimer
  	callback can happen in any namespace ]

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Anton Blanchard <anton@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
LKML-Reference: <4A7F8B6E.2010109@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Xiao Guangrong
2009-08-10 10:52:30 +08:00
committed by Thomas Gleixner
parent c6a2a17702
commit 3f0a525ebf
3 changed files with 77 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
include/trace/events/timer.h
View File

@@ -270,6 +270,72 @@ TRACE_EVENT(hrtimer_cancel,
TP_printk("hrtimer %p", __entry->timer)
);
/**
* itimer_state - called when itimer is started or canceled
* @which: name of the interval timer
* @value: the itimers value, itimer is canceled if value->it_value is
* zero, otherwise it is started
* @expires: the itimers expiry time
*/
TRACE_EVENT(itimer_state,
TP_PROTO(int which, const struct itimerval *const value,
cputime_t expires),
TP_ARGS(which, value, expires),
TP_STRUCT__entry(
__field( int, which )
__field( cputime_t, expires )
__field( long, value_sec )
__field( long, value_usec )
__field( long, interval_sec )
__field( long, interval_usec )
),
TP_fast_assign(
__entry->which = which;
__entry->expires = expires;
__entry->value_sec = value->it_value.tv_sec;
__entry->value_usec = value->it_value.tv_usec;
__entry->interval_sec = value->it_interval.tv_sec;
__entry->interval_usec = value->it_interval.tv_usec;
),
TP_printk("which %d, expires %lu, it_value %lu.%lu, it_interval %lu.%lu",
__entry->which, __entry->expires,
__entry->value_sec, __entry->value_usec,
__entry->interval_sec, __entry->interval_usec)
);
/**
* itimer_expire - called when itimer expires
* @which: type of the interval timer
* @pid: pid of the process which owns the timer
* @now: current time, used to calculate the latency of itimer
*/
TRACE_EVENT(itimer_expire,
TP_PROTO(int which, struct pid *pid, cputime_t now),
TP_ARGS(which, pid, now),
TP_STRUCT__entry(
__field( int , which )
__field( pid_t, pid )
__field( cputime_t, now )
),
TP_fast_assign(
__entry->which = which;
__entry->now = now;
__entry->pid = pid_nr(pid);
),
TP_printk("which %d, pid %d, now %lu", __entry->which,
(int) __entry->pid, __entry->now)
);
#endif /* _TRACE_TIMER_H */
/* This part must be outside protection */