RTLA-OSNOISE(1)

💖 RTLA-OSNOISE(1) 💖

okay bestie, welcome to the General Commands Manual page for rtla-osnoise — the lil corner of the rtla universe that measures your operating system's noise. yes, fr fr, the OS is being loud and we're gonna catch it in 4K 🎀

---

✨ NAME ✨

rtla-osnoise — Measure the operating system noise 🦋

---

✨ SYNOPSIS ✨

rtla osnoise [MODE] ...

---

🌸 DESCRIPTION 🌸

so like, the rtla osnoise tool is literally just an interface for the osnoise tracer. that's it, that's the vibe. 💅

and the osnoise tracer? it dispatches a kernel thread per-cpu. these threads read the time in a loop while with preemption, softirq and IRQs enabled — which is the whole point, because that lets all the sources of operating system noise show up during execution. no hiding, no cap. 👑

the osnoise's tracer threads take note of the delta between each time read, along with an interference counter of all sources of interference. then, at the end of each period, the osnoise tracer displays a summary of the results. cute, organized, iconic. ✨

now the osnoise tracer outputs information in two ways:

• It periodically prints a summary of the noise of the operating system, including the counters of the occurrence of the source of interference.
• It also provides information for each noise via the osnoise: tracepoints.

so the rtla osnoise top mode displays information about the periodic summary from the osnoise tracer. and the rtla osnoise hist mode displays information about the noise using the osnoise: tracepoints. for further details, please refer to the respective man page. go read them, i'll wait 🫶

---

🦋 MODES 🦋

• top — Prints the summary from osnoise tracer. 💖
• hist — Prints a histogram of osnoise samples. 📊

If no MODE is given, the top mode is called, passing the arguments. no thoughts, just defaults ✨

---

💅 OPTIONS 💅

• -h, --help — Display the help text. that's it, that's the whole option list, she's lowkey minimal 🎀

For other options, see the man page for the corresponding mode. (yes bestie, the real options live in the mode pages — iykyk 👑)

---

🌈 SEE ALSO 🌈

• rtla-osnoise-top(1)
• rtla-osnoise-hist(1)
• Osnoise tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html>

---

🎀 AUTHOR 🎀

Written by Daniel Bristot de Oliveira <bristot@kernel.org> 🫶

---

🙈 REPORTING BUGS 🙈

Report bugs to <linux-kernel@vger.kernel.org> and <linux-trace-devel@vger.kernel.org> — pls be nice, they're doing their best 💜

---

⭐ LICENSE ⭐

rtla is Free Software licensed under the GNU GPLv2. periodt. 💅

---

🌸 COPYING 🌸

Copyright (C) 2021 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL). 💖

---

okay that's the whole page, you ate it, go measure some noise bestie 🦋✨ this was RTLA-OSNOISE(1), part of the General Commands Manual collection — mwah, bye! 💜🎀