| From: |
| Zhaolei <zhaolei@cn.fujitsu.com> |
| To: |
| Steven Rostedt <rostedt@goodmis.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@elte.hu> |
| Subject: |
| [PATCH 0/3] ftrace: Add timer-source of walltime for ftrace |
| Date: |
| Tue, 25 Aug 2009 16:12:15 +0800 |
| Message-ID: |
| <4A939CDF.2000407@cn.fujitsu.com> |
| Cc: |
| LKML <linux-kernel@vger.kernel.org> |
| Archive‑link: | |
Article |
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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