trace_hrtimer_expire_entry(9)

💅 trace_hrtimer_expire_entry(9) 💅

okay so, bestie — welcome to the Kernel API Manual 💖. This page is short, sweet, and highkey useful. Let’s go!! ✨

🌸 NAME 🌸

trace_hrtimer_expire_entry — called immediately before the hrtimer callback. Periodt. 💅

🎀 SYNOPSIS 🎀

Here’s the exact signature, no cap:

void trace_hrtimer_expire_entry (struct hrtimer *hrtimer , ktime_t now
       );

🦋 ARGUMENTS 🦋

• hrtimer — pointer to struct hrtimer. You’re handing over the timer struct pointer, bestie. 🫶
• now — variable which contains current time of the timers base. It’s the timer base’s “right now,” lowkey important. ⏱️

🌈 DESCRIPTION 🌈

This hook allows you to determine the timer latency — that’s the whole assignment, and it ate. ⏱️✨ It’s giving observability, and it’s doing exactly what it says on the tin. 🎀

💜 SEE ALSO 💜

Kernel file ./include/trace/events/timer.h is where the whole timer tracepoint family lives 🫶. Go say hi to:

• trace_timer_init(9)
• trace_timer_start(9)
• trace_timer_expire_entry(9)
• trace_timer_expire_exit(9)
• trace_timer_cancel(9)
• trace_hrtimer_setup(9)
• trace_hrtimer_start(9)
• trace_hrtimer_start_expired(9)
• trace_hrtimer_expire_exit(9)
• trace_hrtimer_cancel(9)
• trace_hrtimer_rearm(9)
• trace_itimer_state(9)
• trace_itimer_expire(9)

xoxo, your fav Unix bestie 💅 — sourced from ./include/trace/events, dated October 2026. 🎀✨