[lttng-dev] Lttng trace showing empty result while doing lttng view

[Jonathan Rajotte-Julien]

On Mon, Apr 03, 2017 at 11:56:57AM +0530, abhishekk at uurmi.com wrote:
>  
> 
> 	I am trying to trace raspberry (I am using raspberry 3 B ) Linux
> kernel by using lttng. The problem i am facing is after the successful
> completion of running following commands i am not able to see tracing
> result. It seems tracing file is empty. 1. lltng create mysession
> 
> 	 2. lttng enable-event -a -k 
> 
> 	3. lttng start 
> 
> 	4 lttng stop 5
> 
> 	. lttng view
> 
> 	 Note:- I am not facing any error while running above command and
> kernel tracing file is generated at proper path. And I am not facing
> this problem when i am tracing for user space application.  
> 
> 	I am using version 2.9 of kernel modules and version 2.5 of lttng
> modules.Kernel modules are loaded i can see using lsmod.  

Not sure I understand which version of lttng-modules you are currently using.

Can you share with us the result of 'modinfo lttng-tracer'?
Could you pastebinit (or equivalent) the log produced by the lttng-sessiond in
verbose mode (lttng-sessiond -vvv).

Please take a look at the bug reporting guidelines [1].

Cheers

[1] http://lttng.org/community/#bug-reporting-guidelines

> Thanks & Regards
> Abhishek Kumar
> 7801078513 
> 
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-- 
Jonathan Rajotte-Julien
EfficiOS