[lttng-dev] profiling areas of LTTng

[lttng-dev] profiling areas of LTTng

[Bala Gundeboina via lttng-dev]

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Hi all,
         I are working in a Ti project, I already installed LTTng and i am able to trace userspace.I have a doubt regarding profiling areas of LTTng. In the project we are using ISP and RGB gstreamer. can we profile exactly how much time taken by ISP and RGB gstreamer to process each frames by using LTTng userspace tracing. i want to know is this possible to profile by LTTng, what are the supported profiling areas and peripherals of LTTng, Sorry if any grammatical mistakes made.

Thanks & Regards

Bala Gundeboina
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Re: [lttng-dev] profiling areas of LTTng

[Kienan Stewart via lttng-dev]

Hi Bala,


On 2023-07-31 07:01, Bala Gundeboina via lttng-dev wrote:
> Hi all,
>           I are working in a Ti project, I already installed LTTng and i 
> am able to trace userspace.I have a doubt regarding profiling areas of 
> LTTng. In the project we are using ISP and RGB gstreamer. *can we 
> profile exactly how much time taken by ISP and RGB gstreamer to process 
> each frames* by using LTTng userspace tracing.

If the work being done to process each frame is being done via library 
calls, it would be possible to use a custom userspace tracing helper 
which instruments the necessary function calls, similar to those found 
[here][1] which are loaded via LD_PRELOAD.

Otherwise you will need to modify and recompile your application to [add 
tracepoints][2], or use a tool that does dynamic profiling.

> i want to know is this 
> possible to profile by LTTng, what are the supported profiling areas and 
> peripherals of LTTng, Sorry if any grammatical mistakes made.
> 

It is possible to add static (user-defined) instrumentation to 
applications using [liblttng-ust][3] in C/C++. [Helpers][4] are also 
available for Java (JUL/Log4j) and Python applications.

Tracing of the linux kernel and various system information is possible 
with kernel modules provided by [lttng-modules][5].

[1]: https://lttng.org/docs/v2.13/#doc-prebuilt-ust-helpers
[2]: https://lttng.org/docs/v2.13/#doc-c-application
[3]: https://lttng.org/docs/v2.13/#doc-lttng-ust
[4]: https://lttng.org/docs/v2.13/#doc-lttng-ust-agents
[5]: https://lttng.org/docs/v2.13/#doc-lttng-modules

thanks,
kienan

> Thanks & Regards
> 
> Bala Gundeboina
> This message contains information that may be privileged or confidential 
> and is the property of the KPIT Technologies Ltd. It is intended only 
> for the person to whom it is addressed. If you are not the intended 
> recipient, you are not authorized to read, print, retain copy, 
> disseminate, distribute, or use this message or any part thereof. If you 
> receive this message in error, please notify the sender immediately and 
> delete all copies of this message. KPIT Technologies Ltd. does not 
> accept any liability for virus infected mails.
> 
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
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