Hi Jérémie,
Thx for your reply,
I'm doing a mockup on an Ubuntu host for now
Ok for the graph, I cannot embed it in my application though
I wanted that application to directly output CTF (with compound types,
excluding LTTng) but I guess I'll output it in my format and then
post-process it in a bt2 graph with a custom source and the ctf sink
Best regards,
Charles
Hi Charles,
I can't really comment on what the packages do, but babeltrace2
provides those headers under "include/babeltrace2-ctf-writer" since
that library is somewhat "grafted" to the project. Which distro are you
using?
As for where to "plug" your bindings, that library is there to maintain
compatibility with the ctf-writer library that was provided by
Babeltrace 1.x as it had a number of external users. I don't expect it
to keep up with new CTF versions.
A more "future proof" integration point is to write a source component,
and instanciate it in a graph configured with the CTF filesystem sink,
and feed your events through the graph.
Let me know if you want more information,
Jérémie
--
Jérémie Galarneau
EfficiOS Inc.
https://www.efficios.com
Le 2023-02-02 17:06, chafray...@free.fr a écrit :
Hi,
So I wrote a draft of Rust lib above ctf-writer, using the apis as
demonstrated in the ctf-writer test
For deployment I wanted to use "libbabeltrace2-ctf-writer.so" in the
"libbabeltrace2-dev" package but I could not locate the matching
includes in there or in the other babeltrace 2 packages
Did I miss them somewhere ? Should I have plugged in at another level
in babeltrace2 ?
Best regards,
Charles
----- Mail original -----
De: chafray...@free.fr
À: "Mathieu Desnoyers" <mathieu.desnoy...@efficios.com>
Cc: lttng-dev@lists.lttng.org
Envoyé: Lundi 16 Janvier 2023 10:38:28
Objet: Re: [lttng-dev] LTTng UST structure support
Hi Mathieu,
Thanks for your reply :)
I'll stick to bt2 modules in the meantime then
I'll already be saving a ton of time with those and the CTF spec which
is great !
Best regards,
Charles
----- Mail original -----
De: "Mathieu Desnoyers" <mathieu.desnoy...@efficios.com>
À: chafray...@free.fr, lttng-dev@lists.lttng.org
Envoyé: Jeudi 12 Janvier 2023 21:10:57
Objet: Re: [lttng-dev] LTTng UST structure support
On 2023-01-09 09:02, chafraysse--- via lttng-dev wrote:
Hi,
I'm looking for a CTF writer to serialize instrumentations in an
embedded Linux/Rust framework
LTTng UST looked like a very strong option, but I want to serialize
structures as CTF compound type structures and I did not see those
supported in the doc or api
This is correct. I am currently working on a new project called
"libside" (see https://git.efficios.com/?p=libside.git;a=summary) which
features support for compound types.
However, we still need to do the heavy-lifting implementation work of
integrating this with LTTng-UST. This is the plan towards supporting
compound types in LTTng-UST.
I'd love to have confirmation that I did not just miss something :)
If LTTng UST is out for me I will probably try to use the ctf-writer
module of babeltrace 2 instead
For now the ctf-writer modules of bt2 would be an alternative to
consider, but remember that it is not designed for low-impact tracing
such as lttng-ust. So it depends on how much tracer overhead/runtime
impact you can afford in your use-case.
Thanks,
Mathieu
Best regards,
Charles
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--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
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