[lttng-dev] LTTng UST structure support

[lttng-dev] LTTng UST structure support

[chafraysse--- via lttng-dev]

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
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

Best regards,

Charles
_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

Re: [lttng-dev] LTTng UST structure support

[Mathieu Desnoyers via lttng-dev]

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
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

Re: [lttng-dev] LTTng UST structure support

[chafraysse--- via lttng-dev]

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.desnoyers@efficios.com>
À: chafraysse@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
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

Re: [lttng-dev] LTTng UST structure support

[chafraysse--- via lttng-dev]

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: chafraysse@free.fr
À: "Mathieu Desnoyers" <mathieu.desnoyers@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.desnoyers@efficios.com>
À: chafraysse@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
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

Re: [lttng-dev] LTTng UST structure support

[Jérémie Galarneau via lttng-dev]

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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

________________________________
From: lttng-dev <lttng-dev-bounces@lists.lttng.org> on behalf of chafraysse--- via lttng-dev <lttng-dev@lists.lttng.org>
Sent: February 2, 2023 11:06
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Subject: Re: [lttng-dev] LTTng UST structure support

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: chafraysse@free.fr
À: "Mathieu Desnoyers" <mathieu.desnoyers@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.desnoyers@efficios.com>
À: chafraysse@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
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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_______________________________________________
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Re: [lttng-dev] LTTng UST structure support

[chafraysse--- via lttng-dev]

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, chafraysse@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: chafraysse@free.fr
> À: "Mathieu Desnoyers" <mathieu.desnoyers@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.desnoyers@efficios.com>
> À: chafraysse@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
>> _______________________________________________
>> lttng-dev mailing list
>> lttng-dev@lists.lttng.org
>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> 
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> https://www.efficios.com
_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

Re: [lttng-dev] LTTng UST structure support

[Jérémie Galarneau via lttng-dev]

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Hi Charles,

I'm not sure why you can't embed a graph in your application. The idea is to make new events visible to your source component (or the iterator it provides) by exposing some form of "user data" as a shared context [1][2]. When the event is made available to the source through that context, your "write" function can then pass it down the graph by invoking the graph's "run" method.

I'll see if I can find time to produce an exemple if you think it would be helpful.

Regards,
Jérémie

[1] https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-self-msg-iter.html#gaa0795c9c18725a844df5b5c705255977
[2] https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-self-comp.html#gae01283b1ee0c3945c4f54205a1528169
[3] https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-graph.html#gad2e1c1ab20d1400af1b552e70b3d567c

--
Jérémie Galarneau
EfficiOS Inc.
https://www.efficios.com
________________________________
From: lttng-dev <lttng-dev-bounces@lists.lttng.org> on behalf of chafraysse--- via lttng-dev <lttng-dev@lists.lttng.org>
Sent: February 9, 2023 04:15
To: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Subject: Re: [lttng-dev] LTTng UST structure support

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, chafraysse@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: chafraysse@free.fr
> À: "Mathieu Desnoyers" <mathieu.desnoyers@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.desnoyers@efficios.com>
> À: chafraysse@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
>> _______________________________________________
>> lttng-dev mailing list
>> lttng-dev@lists.lttng.org
>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> https://www.efficios.com
_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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Re: [lttng-dev] LTTng UST structure support

[chafraysse--- via lttng-dev]

Hi Jérémie,

Right, I missed the graph C api, my bad
Thanks for the example offer but I don't want to take up more of your 
time :)

Best regards,

Charles

> Hi Charles,
> 
> I'm not sure why you can't embed a graph in your application. The idea 
> is to make new events visible to your source component (or the iterator 
> it provides) by exposing some form of "user data" as a shared context 
> [1][2]. When the event is made available to the source through that 
> context, your "write" function can then pass it down the graph by 
> invoking the graph's "run" method.
> 
> I'll see if I can find time to produce an exemple if you think it would 
> be helpful.
> 
> Regards,
> Jérémie
> 
> [1] 
> https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-self-msg-iter.html#gaa0795c9c18725a844df5b5c705255977
> [2] 
> https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-self-comp.html#gae01283b1ee0c3945c4f54205a1528169
> [3] 
> https://babeltrace.org/docs/v2.0/libbabeltrace2/group__api-graph.html#gad2e1c1ab20d1400af1b552e70b3d567c
> 
> --
> Jérémie Galarneau
> EfficiOS Inc.
> https://www.efficios.com
> 
> Le 2023-02-09 10:15, chafraysse@free.fr a écrit :
> 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, chafraysse@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: chafraysse@free.fr
>> À: "Mathieu Desnoyers" <mathieu.desnoyers@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.desnoyers@efficios.com>
>> À: chafraysse@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
>>> _______________________________________________
>>> lttng-dev mailing list
>>> lttng-dev@lists.lttng.org
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>> 
>> --
>> Mathieu Desnoyers
>> EfficiOS Inc.
>> https://www.efficios.com
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