arch_scale_freq_capacity(9)

✨ NAME ✨

okay so this is the arch_scale_freq_capacity(9) page from the Kernel API Manual, and it does one job: get the frequency scale factor of a given CPU. bestie, that's the whole vibe 💅

🌸 SYNOPSIS 🌸

unsigned long arch_scale_freq_capacity (int cpu );

🎀 ARGUMENTS 🎀

• cpu — the CPU in question. like, the exact CPU you're asking about, no cap 👑

🦋 RETURN 🦋

the frequency scale factor normalized against SCHED_CAPACITY_SCALE, i.e.

💖 DESCRIPTION 💖

the formula is literally right here:

f_curr ------ * SCHED_CAPACITY_SCALE f_max

the layout is a little quirky here, but every piece is exactly as written above 😭✨

🌈 SEE ALSO 🌈

• Kernel file ./kernel/sched/sched.h
• available_idle_cpu(9)
• highest_flag_domain(9)
• cpufreq_update_util(9)

and that's the whole page, bestie 🫶 source ./kernel/sched, dated October 2026. periodt 💜