LTTng tracing

[Stefan Sauer]

On 12/01/2013 11:12 AM, Stefan Sauer wrote:
> On 11/19/2013 04:42 PM, Olivier Crête wrote:
>> Hi,
>>
>> On Tue, 2013-11-19 at 09:22 +0000, Ikaheimonen, JP wrote:
>>> I would be interested in seeing LTTng UST tracing in the GStreamer
>>> code.
>> Someone has already done it:
>> https://github.com/alexander-barabash/gstreamer-lttng/commits/0.10
>>
>> That said, I think we'd like something more generic. Someone (I think it
>> was Stefan Sauer) recently proposed some cross-platform tracing
>> infrastructure (purely user-space and GStreamer specific). We discussed
>> having some way to re-use the same tracepoints with the different
>> frameworks (lttng, dtrace, custom, etc). But I can't references to that
>> discussion.
>>
>>
> The current state of what I am doing can be found here
> http://cgit.freedesktop.org/~ensonic/gstreamer/?h=tracer
> <http://cgit.freedesktop.org/%7Eensonic/gstreamer/?h=tracer>
> Feedback much welcome.
>
> I looked into babeltrace a bit (to output traces in the format LTTng
> uses). So far they don't have a lot of tools processing the traces :/
> Right now I just log into the gst debug log, but thats one of the next
> things on the todo list to change. So what do I have right now:
> * tracepoints in the gst code base
> * 3 plugins that log trace data (log, stats, rusage)
> * one front-end to process trace data (gst-stats)
>
> Stefan
>
>
Just to maybe clear some confusion. If we can log/convert the tracelog
to the babeltrace format (or add a reader/write for our format to
babeltrace) we can have unified kernel/gst traces on linux.

Stefan

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