[lttng-dev] kprobe timestamp

[Mathieu Desnoyers]

* OSDepend (osdepend at gmail.com) wrote:
> 
> 
> > On 2013-04-23 12:50, OSDepend wrote:
> > > Hi guys,
> > > I just try to use kprobe, and get some thing like below:
> > >            
> > > java 15893 [015] 96380.588871: timer_cancel: timer=0xffff8804379d6698
> > >             java 15721 [010] 96380.588872: timer_cancel: timer=0xffff8800be3d6698
> > >             java 15893 [015] 96380.588875: timer_expire_entry: timer=0xffff8804379d6698 function=delayed_work_timer_fn now=4391194790
> > >             java 15721 [010] 96380.588876: timer_expire_entry: timer=0xffff8800be3d6698 function=delayed_work_timer_fn now=4391194790
> > > I want to know exactly about the time units of the events, such as
> > > 96380.588871, and 96380.588872.
> > > The number befor "." is second or millisecond? and  Is the number
> > > after "." nanoseconds or microseconds?
> > >
> > >What did you use to generate this output? I don't recognize it.
> 
> > >Yannick
> 
> /usr/src/linux-2.6.38.6/Documentation/trace/kprobetrace.txt
> I use kprobe to trace, you can get the documentation of kprobe in the text above.
> Does any one recognize the time format?

I guess you are using ftrace or perf rather than LTTng. You might want
to ask them instead.

Thanks,

Mathieu


-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com