linux-kernel - [PATCH 0/3] ftrace: Add timer-source of walltime for ftrace

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Message-ID: <4A939CDF.2000407@cn.fujitsu.com>
Date:	Tue, 25 Aug 2009 16:12:15 +0800
From:	Zhaolei <zhaolei@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/3] ftrace: Add timer-source of walltime for ftrace

Hi,

I finished this patchset to enable ftrace display walltime.

We can get following output by using it:
 # cd /mnt/debugfs/tracing/
 # cat trace_clock
 [local] global walltime
 # echo sched_switch > current_tracer
 # cat trace
 # tracer: sched_switch
 #
 #           TASK-PID    CPU#    TIMESTAMP  FUNCTION
 #              | |       |          |         |
             bash-3580  [000]  2916.188093:   3580:120:S   + [000]  3580:120:S bash
             bash-3580  [000]  2916.188205:   3580:120:S   + [000]  3580:120:S bash
             bash-3580  [000]  2916.188538:   3580:120:R   + [000]     5:115:S events/0
             bash-3580  [000]  2916.188599:   3580:120:R ==> [000]     5:115:R events/0
         events/0-5     [000]  2916.188669:      5:115:S ==> [000]  3580:120:R bash
 ...
 # echo walltime > trace_clock
 # cat trace
 # tracer: sched_switch
 #
 #           TASK-PID    CPU#           TIMESTAMP  FUNCTION
 #              | |       |                        |         |
             bash-3580  [000] 2009-08-24 18:03:16.500705:   3580:120:S   + [000]  3580:120:S bash
             bash-3580  [000] 2009-08-24 18:03:16.500815:   3580:120:S   + [000]  3580:120:S bash
             bash-3580  [000] 2009-08-24 18:03:16.500815:   3580:120:S   + [000]  3580:120:S bash
             bash-3580  [000] 2009-08-24 18:03:16.500815:   3580:120:S ==> [000]     5:115:R events/0
         events/0-5     [000] 2009-08-24 18:03:16.500815:      5:115:R   + [000]  3578:120:S sshd
 ...

This patchset merged suggestion of Steven, Frederic and Kosaki-san on last RFC.

Thanks
Zhaolei

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