STRUCT PREV_CPUTIME(9)

🌸 struct prev_cputime(9) 🌸

okay so bestie, welcome to the struct prev_cputime(9) page from the Kernel API Manual — yes the whole thing is literally named after the struct, iconic behavior honestly 💅

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✨ NAME ✨

struct prev_cputime — a little snapshot of system and user cputime, no cap 🫶

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🦋 SYNOPSIS 🦋

struct prev_cputime {
  #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE;
    u64 utime;
    u64 stime;
    raw_spinlock_t lock;
  #endif;
 };

like… look at her go 😭 she's so simple and so powerful at the same time.

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🎀 Members 🎀

• utime — the time spent in user mode 💖 that's the vibes hours, bestie
• stime — the time spent in system mode 🔥 kernel grindset hours fr fr
• lock — protects the above two fields 🫶 it's giving bodyguard energy, and honestly? we love a protective icon

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💜 Description 💜

So what does she do? She stores previous user/system time values such that we can guarantee monotonicity. periodt. ⭐

lowkey the whole point: monotonicity stays guaranteed. do not come for her, she has one job and she ate 💅

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🌈 SEE ALSO 🌈

Kernel file ./include/linux/sched.h plus these little friends:

• __task_lazy_mmu_mode_active(9)
• is_lazy_mmu_mode_active(9)
• set_cpus_allowed_ptr(9)
• task_nice(9)
• is_idle_task(9)

go read them, iykyk 🧚

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that's the whole page babes 💜 this one lives in ./include/linux, it's dated October 2026, and yeah — it's struct prev_cputime(9) herself, signing off 💅✨🎀