[lttng-dev] [EXTERNAL] Re: Status of LTTng-scope and Lttng-analyses

[Cook, Layne]

Thanks for the reply Mathieu. We are going to go with Trace Compass.

Could I hit you with one more question? I've been unable to find an answer on the web.

When I build lttng-modules using the sources and instructions from here<https://github.com/lttng/lttng-modules/blob/master/README.md#kernel-built-in-support>, it fails because it cannot sign the kernel modules with keys. During the  "make modules_install" phase, it gives these messages for each module:

At main.c:160:
- SSL error:02001002:system library:fopen:No such file or directory: crypto/bio/bss_file.c:69
- SSL error:2006D080:BIO routines:BIO_new_file:no such file: crypto/bio/bss_file.c:76
sign-file: certs/signing_key.pem: No such file or directory
  INSTALL /root/lttng-modules-master/src/lib/lttng-lib-ring-buffer.ko

Subsequently, the modules fail to load with an error:
modprobe: ERROR: could not insert 'lttng_ring_buffer_client_discard': Required key not available

I'm am installing on a RHEL8 system. Is this because RHEL8 is not supported as an official Enterprise release? Have the keys and/or their locations changed for RHEL8?

Thanks,

LC
layne.cook at ballaerospace.com
________________________________
From: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
Sent: Wednesday, July 19, 2023 8:09 AM
To: Cook, Layne <Layne.Cook at ballaerospace.com>; lttng-dev at lists.lttng.org <lttng-dev at lists.lttng.org>
Cc: Matthew Khouzam <matthew.khouzam at ericsson.com>
Subject: [EXTERNAL] Re: [lttng-dev] Status of LTTng-scope and Lttng-analyses

On 7/18/23 15:27, Cook, Layne via lttng-dev wrote:
> Can you tell me the status of the beta projects listed on the web site?
>
> LTTng scope
> LTTng analyses
>
> The github projects haven't had an activity for quite a while. Have
> these projects been abandoned, or superceded by something else?

Hi Layne,

Thanks for your interest in those projects!

The LTTng scope beta project was an attempt at doing a significant UX
redesign of Trace Compass, starting from a use-cases/user workflow
perspective. We currently don't have the resources/funding/staff to
work on this project further, so it has not progressed for a while.

You should look at the Trace Compass and VSCode trace extension
projects instead, which have a lot more activity:

https://urldefense.us/v3/__https://tracecompass.org__;!!LNnLTj473Oq-L_5O-MApfw!itm5HF-sPBKIyjFB3RohR9bQQPAiezGuN0s4IGMJQ-4HqkYlCNLHc3e9tJ6Zl_S4J6DtTNo7QeOQGjNezadNyIoevmmmSCqGL7Y$
https://urldefense.us/v3/__https://github.com/eclipse-cdt-cloud/vscode-trace-extension__;!!LNnLTj473Oq-L_5O-MApfw!itm5HF-sPBKIyjFB3RohR9bQQPAiezGuN0s4IGMJQ-4HqkYlCNLHc3e9tJ6Zl_S4J6DtTNo7QeOQGjNezadNyIoevmmmwRBeFCI$

The LTTng analyses beta project is a set of python scripts to analyze
LTTng traces. Our original intent with that project was that EfficiOS
would fund the work to create those analyses as prototypes in Python,
and eventually customers would fund the rather large amount of work
required to go from a prototype (slow scripts) to a production quality
project (faster C++ implementation, generic state tracking module).
Unfortunately, this never materialized, so this beta project has been
on the back burner as well.

In the recent years we have focused our efforts on the Babeltrace 2
project and on CTF2 (Common Trace Format version 2).

Feel free to have a look at Trace Compass and VSCode trace extension, and
please let us know if LTTng scope and LTTng analyses fill a gap that is
not covered by those other tools.

Thanks,

Mathieu

>
> Thanks,
>
> LC
>
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--
Mathieu Desnoyers
EfficiOS Inc.
https://urldefense.us/v3/__https://www.efficios.com__;!!LNnLTj473Oq-L_5O-MApfw!itm5HF-sPBKIyjFB3RohR9bQQPAiezGuN0s4IGMJQ-4HqkYlCNLHc3e9tJ6Zl_S4J6DtTNo7QeOQGjNezadNyIoevmmmVNGqlAY$

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