[Bug 2059080] Re: Add Real-time Linux Analysis tool (rtla) to linux-tools

This bug is awaiting verification that the linux-
nvidia-6.8/6.8.0-1008.8~22.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-jammy-linux-
nvidia-6.8' to 'verification-done-jammy-linux-nvidia-6.8'. If the
problem still exists, change the tag 'verification-needed-jammy-linux-
nvidia-6.8' to 'verification-failed-jammy-linux-nvidia-6.8'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-jammy-linux-nvidia-6.8-v2 verification-needed-jammy-linux-nvidia-6.8

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https://bugs.launchpad.net/bugs/2059080

Title:
Add Real-time Linux Analysis tool (rtla) to linux-tools

Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Noble:
Fix Released

Bug description:
[Impact]

The **rtla** is a meta-tool that includes a set of commands that aims
to analyze the real-time properties of Linux.

Considering the latest "low-latency" capabilities acquired by the
generic kernel and also considering the recent trend in Ubuntu to
focus on performance and observability (see for example
https://ubuntu.com/blog/ubuntu-performance-engineering-with-frame-
pointers-by-default), it makes sense to provide more tools that can
help to analyze timing/responsive performance, such as rtla.

[Test case]

Simple rtla usage to measure the timer irq / timer thread latency:

$ sudo rtla timerlat

[Fix]

Enable the build of the rtla binary during the kernel build and ship
it with linux-tools.

[Regression potential]

The only potential regression is an increased amount of size in the
linux-tools package, due to the extra binary.

However, the binary itself is really small, the kernel already has all
the required capabilities enabled and we don't need to introduce any
additional user-space dependency, therefore such extra space is
expected to be minimal.

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