ftrace: add tracepoint for timer event [LWN.net]

From:		Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To:		Ingo Molnar <mingo@elte.hu>
Subject:		[PATCH v2 0/3] ftrace: add tracepoint for timer event
Date:		Mon, 06 Jul 2009 17:37:06 +0800
Message-ID:		<4A51C5C2.20802@cn.fujitsu.com>
Cc:		Thomas Gleixner <tglx@linutronix.de>, Steven Rostedt <rostedt@goodmis.org>, Frederic Weisbecker <fweisbec@gmail.com>, Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>, Zhaolei <zhaolei@cn.fujitsu.com>, kosaki.motohiro@jp.fujitsu.com, LKML <linux-kernel@vger.kernel.org>
Archive-link:		Article, Thread

Hi,

We can monitor timer's lifecycle and behaviors by these tracepoint. 

Following tracepoints are introduced as ingo's suggestion in
	http://marc.info/?l=linux-kernel&m=123791899529128&...

for timer:
trace_timer_init()
trace_timer_start()
trace_timer_expire()
trace_timer_cancel()

for hrtimer:
trace_hrtimer_init()
trace_hrtimer_start()
trace_hrtimer_expire()
trace_hrtimer_cancel()

for itimer:
itimer_state
itimer_expire()

Changlog from latest patchset:
Add itimer's patch to monitor itimer's lifecycle and behaviors