SYSMON(4)

💖 SYSMON(4) 💖

okay so bestie, this is the sysmon page from the Kernel Interfaces Manual — and no, it's not "system monitor the app", it's the actual kernel-side framework, and it's honestly iconic.

---

✨ NAME ✨

sysmon — the system monitoring and power management interface, aka the machine-independent glow-up that lets your kernel keep an eye on itself 🔥

---

🌸 DESCRIPTION 🌸

The machine-independent sysmon is a general purpose framework for system monitoring and power management. It's giving "one framework, many jobs" and honestly it ate. The main components of sysmon include:

• An ioctl(2) interface available via /dev/sysmon. The userland counterparts include utilities such as envstat(8) and daemons such as powerd(8). 🫶
• An interface for the purpose of delivering different system and power events to userspace; sysmon_pswitch(9). it's literally the messenger, and we love it for that
• A general purpose sensor framework, sysmon_envsys(9). sensors? slay 💅
• A general purpose task queue, sysmon_taskq(9). queued and unbothered ✨
• An interface for watchdog timers. keeping watch so you don't have to 👑

---

🎀 FILES 🎀

• /dev/sysmon — the whole vibe check lives here, bestie. this is the device node the ioctl(2) interface is available through 🦋

---

🌈 SEE ALSO 🌈

these are the friends of the main character, lowkey required reading:

• envsys(4)
• swsensor(4)
• envstat(8)
• powerd(8)
• wdogctl(8)
• pmf(9)

iykyk 💜

---

👑 AUTHORS 👑

Jason R. Thorpe <thorpej@NetBSD.org> — the actual legend behind this, periodt 🙈

---

okay that's the whole page, no notes, every detail intact, you're welcome 💖

kisses and good vibes from the Debian crew, June 22, 2011 ✨💅🎀