Messages in this thread | | | Date | Wed, 16 Sep 2009 13:25:50 +0800 | From | Zhaolei <> | Subject | [PATCH v2 0/2] ftrace: Add timer-source of walltime for ftrace |
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Hi,
I rebased patchset of "enable ftrace display walltime".
It can make ftrace display intuitionistic time information to user with walltime clock.
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 ...
It need to applys on my patch of: [PATCH v4 1/2] Add function to convert between calendar time and broken-down time for universal use
Hi, Thomas,
To make ftrace's walltime function work, I need to add a tracepoint into xtime's code, so we can set ftrace's walltime clockbase when time changed.
Could you have a look at this patch, and give me your suggestion?
Changelog: v1->v2: Rebase to top of tip tree.
Thanks Zhaolei
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