RV-MON-WIP(1)

🦋 RV-MON-WIP(1) — the wakeup-in-preemptive bestie 💅

okay so. this is a page from the General Commands Manual, section 1 (that's the "commands you actually type" section, iykyk). sit down, hydrate, and let's get into it 🍓

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✨ NAME ✨

rv-mon-wip — the Wakeup In Preemptive monitor 🫶

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🌸 SYNOPSIS 🌸

rv mon wip [OPTIONS]

that's it. that's the whole vibe. you run rv mon wip, you add options, the monitor does its thing ✨

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💖 DESCRIPTION 💖

okay so the wakeup in preemptive monitor — wip, which is genuinely the cutest acronym on this whole system, no notes — is a sample per-cpu monitor. that means it's per-CPU and it's sample-based, and it's checking exactly one thing:

does the wakeup event always happen with preemption disabled? 👀

like, if a wakeup event sneaks through while preemption is enabled, that's the thing this monitor is here to catch. main character energy, honestly.

want the deep lore? the kernel documentation has a whole page about this monitor, go read it:

• <https://docs.kernel.org/trace/rv/monitor_wip.html>

(no cap, it's linked right there in the original page too 💜)

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🎀 OPTIONS 🎀

every flag, exactly as it comes, no gatekeeping:

• -h, --help — prints the monitor's options and the list of available reactors. if you're ever lost, this is your girl 💅
• -r, --reactor reactor — enables the reactor. you gotta tell it which one, and the -h output is where you find the list of available reactors. so like, -h first, then -r. the pipeline is the pipeline ✨
• -s, --self — when you're tracing (-t), this also prints the events that happened during the rv command itself. lowkey risky though: if the rv command itself generates too many events, the tool might end up busy processing its own events only 😭. so use it knowing that, bestie.
• -t, --trace — traces the monitor's events and errors. the receipts. the whole point 🔥
• -v, --verbose — prints debug messages. for when you want the tea ☕

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👀 SEE ALSO 👀

• rv(1)
• rv-mon(1)
• Linux kernel RV documentation: <https://www.kernel.org/doc/html/latest/trace/rv/index.html>

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🧚 AUTHOR 🧚

Written by Daniel Bristot de Oliveira <bristot@kernel.org> — thank you for your service king 👑

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🐛 REPORTING BUGS 🐛

found a bug? don't suffer in silence, tell the people:

• <linux-kernel@vger.kernel.org>
• <linux-trace-devel@vger.kernel.org>

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📜 LICENSE 📜

rv is Free Software, licensed under the GNU GPLv2. periodt 💜

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🌈 COPYING 🌈

Copyright (C) 2022 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).

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and that's the whole page, bestie 🫶 it's from the General Commands Manual, it's page RV-MON-WIP(1) (section 1, obviously 💅), and you've officially read all of it. go trace something iconic ✨💖