[lttng-dev] make a trace_event in a module (driver)

Klaus Dannecker klaus.dannecker at gmx.de
Mon Dec 16 12:05:50 EST 2013

Am 15.12.2013 23:54, schrieb Francis Giraldeau:
> Le 2013-12-15 13:22, Klaus Dannecker a écrit :
>> Hello,
>> now its work!
>> i have download the new lttng-tools. (git pull)
>> the next problem:
>> with
>> sudo insmod
>> /lib/modules/3.8.0-29-generic/extra/addons/lttng-trace-events-sample.ko
>> and
>> lttng list -k
>> hurray! i see the new event!
> Great!
>> now i start a lttng session and load the trace-events-sample.ko
>> (compiling the sample in the linux source code)
>> but i see not the event in the session. (looking in the eclipse viewer)
>> what i am doing wrong?
> Could it be possible that the tracepoint is not called? To verify this,
> I would recommend you to display the information in dmesg just before
> the tracepoint:
> if (printk_ratelimit())
> 	printk("hello event!");
> Then: dmesg -c
> What does exactly the module is supposed to record?
I see the message "hello event!"
it does not matter if i start a lttng session or not. I see always the 


Cheers, Francis

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