ktime_get_raw_fast_ns(9)

okay bestie, this is ktime_get_raw_fast_ns(9) from the Kernel API Manual, and it’s lowkey a slay ✨

💖 NAME 💖

ktime_get_raw_fast_ns — Fast NMI safe access to clock monotonic raw. That’s the whole vibe: fast, NMI-safe, and pointed at the raw monotonic clock 💅

✨ SYNOPSIS ✨

u64 notrace ktime_get_raw_fast_ns (void );

🎀 ARGUMENTS 🎀

• void — no arguments. Nothing to pass, bestie. Zero. Nada. The function just shows up and does its thing 🫶

🦋 DESCRIPTION 🦋

Contrary to ktime_get_mono_fast_ns, this one is always correct — because the conversion factor is not affected by NTP/PTP correction. fr fr, that’s the whole point 👑

no NTP/PTP correction touching the conversion factor here, so the “always correct” line is literally the main character moment 💅

🌈 SEE ALSO 🌈

okay, the reference list is long and it ate, so here it is in order:

• Kernel file ./kernel/time/timekeeping.c struct tk_fast(9)
• tk_setup_internals(9)
• update_fast_timekeeper(9)
• ktime_get_mono_fast_ns(9)
• ktime_get_boot_fast_ns(9)
• ktime_get_tai_fast_ns(9)
• ktime_get_real_fast_ns(9)
• halt_fast_timekeeper(9)
• pvclock_gtod_register_notifier(9)
• pvclock_gtod_unregister_notifier(9)
• timekeeping_forward_now(9)
• ktime_get_real_ts64(9)
• ktime_mono_to_any(9)
• ktime_get_raw(9)
• ktime_get_ts64(9)
• ktime_get_seconds(9)
• ktime_get_real_seconds(9)
• __ktime_get_real_seconds(9)
• ktime_get_snapshot_id(9)
• adjust_historical_crosststamp(9)
• ktime_real_to_base_clock(9)
• get_device_system_crosststamp(9)
• timekeeping_clocksource_has_base(9)
• do_settimeofday64(9)
• __timekeeping_inject_offset(9)
• timekeeping_notify(9)
• ktime_get_raw_ts64(9)
• timekeeping_valid_for_hres(9)
• timekeeping_max_deferment(9)
• read_persistent_clock64(9)
• read_persistent_wall_and_boot_offset(9)
• __timekeeping_inject_sleeptime(9)
• timekeeping_inject_sleeptime64(9)
• timekeeping_resume(9)
• update_wall_time(9)
• getboottime64(9)
• ktime_get_coarse_real_ts64_mg(9)
• ktime_get_real_ts64_mg(9)
• ktime_get_update_offsets_now(9)
• random_get_entropy_fallback(9)
• do_adjtimex(9)
• hardpps(9)
• ktime_get_aux(9)
• ktime_get_aux_ts64(9)

mwah 💋 — signed off from ./kernel/time, October 2026 edition, still your ktime_get_raw_fast_ns(9) bestie 🫶