linux-kernel - [PATCH v2 2/5]: trace_event: export HZ in timer's tracepoint format

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Date:	Tue, 22 Dec 2009 21:03:28 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Paul Mackerras <paulus@...ba.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/5]: trace_event: export HZ in timer's tracepoint format

Export HZ in timer's tracepoint, we can use it to get
TIMER/ITIMER_VIRTUAL/ITIMER_PROF exact latency and it's
suggested by Ingo

Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
 include/trace/events/timer.h |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index 13ec15a..7749ae5 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -74,14 +74,17 @@ TRACE_EVENT(timer_expire_entry,
 	TP_STRUCT__entry(
 		__field( void *,	timer	)
 		__field( unsigned long,	now	)
+		__field( int,		hz	)
 	),
 
 	TP_fast_assign(
 		__entry->timer		= timer;
 		__entry->now		= jiffies;
+		__entry->hz		= HZ;
 	),
 
-	TP_printk("timer=%p now=%lu", __entry->timer, __entry->now)
+	TP_printk("timer=%p now=%lu HZ=%d", __entry->timer, __entry->now,
+		  __entry->hz)
 );
 
 /**
-- 
1.6.1.2


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