trace_hrtimer_expire_exit(9)

📦 version 7.3.1, in nixpkgs unstable

💅 trace_hrtimer_expire_exit 💅

okay bestie, welcome to the Kernel API Manual — yes that's the manual name, we're fancy now ✨ this little page is all about trace_hrtimer_expire_exit(9) and honestly? she's a supporting character who makes the whole plot work. let's get into it 🎀

🌸 NAME 🌸

trace_hrtimer_expire_exit — the function that gets called, like, immediately after the hrtimer callback returns. no waiting, no "give me a sec", literally the instant it comes back 💅

✨ SYNOPSIS ✨

void trace_hrtimer_expire_exit (struct hrtimer *hrtimer );

that's it. that's the whole signature. she's a void, she takes one pointer, she minds her business 🫶

🦋 ARGUMENTS 🦋

  • hrtimer — a pointer to struct hrtimer. just the pointer, that's all she needs, don't overthink it 💖

🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — this function is the exit half of a little duo. when you use it in combination with the hrtimer_expire_entry tracepoint, you can figure out the runtime of the callback function. entry goes in, exit comes out, and you do the math in between. it's giving stopwatch energy ⏱️✨

no cap, that's the whole flex. entry point + exit point = you know how long the callback was cooking 🔥

🌈 SEE ALSO 🌈

living in the kernel file ./include/trace/events/timer.h, and surrounded by her whole friend group 👑:

(yes, trace_hrtimer_expire_exit(9) is in her own SEE ALSO list. self-love, we respect it 💀💖)

and that's the page!! shoutout to ./include/trace/events for housing all this, dated October 2026, filed under trace_hrtimer_expire_exit(9) — mwah, iconic, periodt 🧚💜

📦 where this page comes from