[lttng-dev] status of lttng top

McDermott, Andrew Andrew.McDermott at windriver.com
Tue Oct 23 09:11:16 EDT 2012


> On 22/10/12 07:00 AM, McDermott, Andrew wrote:
>> Hi,
>>> LTTngTop is still work in progress and will remain that way for a long
>>> time, but the version in the PPA (or in the master branch in git) is
>>> perfectly usable for offline traces (traces recorded and replayed
>>> through LTTngTop).
>>> The "live" branch is more experimental and requires patches in both
>>> Babeltrace and Lttng-tools (all documented in the README-LIVE file), but
>>> it worked at the time of Plumbers, I didn't have much time since then to
>>> rebase the branches.
>>> I am waiting for the release of Lttng-tools 2.1 (currently in RC) before
>>> merging those patches. After these patches are integrated, LTTngTop will
>>> be able to work live without any modifications, so directly reading
>>> traces in memory shared with the tracer.
>> Thanks for this info.
>> Right now my interest is with the live streaming; we have a use case
>> where the live streaming is really the only practical solution.
>> Very roughly, would you expect the RC series to conclude this year, or
>> (early) next year?
> Just to clarify, are you interested in live network trace reading or
> live in-memory reading ?
> The patches I was talking about are for in-memory trace reading.

So I guess I don't understand enough of the low-level detail here.  What
I was interested in was being able to consume events, maybe periodically
(1 /s), from a trace written by another process on the same machine.  I
guess that would fall under in-memory trace reading.


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