rdtsc_ordered(9)

📦 version 7.3.1, in nixpkgs unstable

okay bestie, welcome to the rdtsc_ordered(9) page in the Kernel API Manual — yes, that's the manual name, folded in right here so we don't have to do the formal header-line thing 💅✨

🌸 NAME 🌸

rdtsc_ordered — read the current TSC in program order ✨

🎀 SYNOPSIS 🎀

u64 rdtsc_ordered (void );

that's it. that's the whole call. iconic 🫶

🦋 ARGUMENTS 🦋

  • void — no arguments. literally none, bestie. the void is voiding 🕳️

💖 DESCRIPTION 💖

okay so rdtsc_ordered returns the result of RDTSC as a 64-bit integer. no cap.

it's ordered like a load to a global in-memory counter. the vibe is very "properly sequenced," basically ✨

and it should be impossible to observe non-monotonic rdtsc_unordered behavior across multiple CPUs as long as the TSC is synced. that "as long as the TSC is synced" part is the whole mood — do not skip it, bestie 😭

👑 SEE ALSO 👑

  • Kernel file ./arch/x86/include/asm/tsc.h
  • rdtsc(9)

mwah 💋 sign-off time: source/version is ./arch/x86/include/asm, dated October 2026, and this whole page is rdtsc_ordered(9). bye bestie, go read that TSC in program order 🫶✨

📦 where this page comes from