ring_buffer_...t_time_stamp(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ring_buffer_event_time_stamp(9) — Kernel API Manual, bestie edition 🎀

okay so you're in the Kernel API Manual, section 9, and we're talking about ring_buffer_event_time_stamp. she's a little function with a big job and honestly? she ate. let's get into it ✨

🌸 NAME 🌸

ring_buffer_event_time_stamp — return the event's current time stamp 🕐💖

🦋 SYNOPSIS 🦋

u64 ring_buffer_event_time_stamp (struct trace_buffer *buffer , struct ring_buffer_event *event );

🎀 ARGUMENTS 🎀

  • buffer — the buffer that the event is on, iykyk 🫶
  • event — the event we want the time stamp of, the main character of this whole operation 👑

💜 DESCRIPTION 💜

okay so real talk, there are RULES here and you gotta respect them or it's giving undefined chaos 😭

⚠️ bestie listen — this must be called after event is reserved, and before it is committed to the ring buffer. and it must be called from the same context where the event was reserved (normal, softirq, irq, etc). no cap, that part is not optional 💀

so what does it do? it returns the time stamp associated with the current event. if the event has an extended time stamp, then that one is used as the time stamp to return. slay, we love a fallback that's actually the main path ✨

now the cursed part 🫣 — in the highly unlikely case that the event was nested more than the max nesting, then the write_stamp of the buffer is returned. otherwise, current time is returned. but fr fr, neither of the last two cases should ever happen, so don't stress about it, just know they're there 🙈

🔥 SEE ALSO 🔥

go check the kernel file ./kernel/trace/ring_buffer.c — she's the source of truth, the blueprint, the whole vibe 💅

and here's the entire friend group, all of them, no one left out 🫶:

that's the whole page, bestie, you're officially educated 💅✨

signing off from ./kernel/trace, dated October 2026 — same page, same function, same manual, just with way better vibes 🦋💖🎀 periodt.

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