cppc_set_perf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cppc_set_perf — the Kernel API Manual girlies are HERE 🎀

okay so bestie, welcome to cppc_set_perf(9) — this is the kernel API manual page, and yes we're reading a manpage together, it's giving study date energy 📚✨

🌸 NAME 🌸

cppc_set_perf — set a CPU's performance controls. that's it, that's the whole vibe. you're literally telling a CPU how hard to work. main character energy fr fr 👑

✨ SYNOPSIS ✨

int cppc_set_perf (int cpu , struct cppc_perf_ctrls *perf_ctrls );

look at her. one function, two arguments, zero drama (mostly). 💖

🦋 ARGUMENTS 🦋

  • cpu — the CPU you're setting performance controls for. like, which little guy are we tuning today 🎯
  • perf_ctrls — a pointer to cppc_perf_ctrls. and where do you find that struct's lore? cppc_acpi.h, no cap. go look, i'll wait 💅

🔥 RETURN 🔥

  • 0 — success!! slay, it worked, we ate 🍓
  • -ERRNO — otherwise. so, not zero, meaning something went sideways and you get a negative errno back. it's giving "we don't talk about it" 😭
ngl if you're getting the -ERRNO branch, don't just ignore it — that's your signal that the call did not succeed. periodt.

🌈 SEE ALSO 🌈

bestie there are SO many siblings, i'm obsessed. whole cppc family reunion 🫶

Kernel file ./drivers/acpi/cppc_acpi.c, plus:

that's the page, bestie. go set some performance controls responsibly 💜

sign-off time 🧚: this little gem lives in ./drivers/acpi, dated October 2026 — and that's the version/source tea, mwah 💋

📦 where this page comes from