em_perf_state_from_pd(9)

✨ NAME ✨

okay so em_perf_state_from_pd — it grabs you the performance states table of a perf. domain. This is the em_perf_state_from_pd(9) page from the Kernel API Manual, bestie 💅✨

📜 SYNOPSIS 📜

struct em_perf_state * em_perf_state_from_pd (struct em_perf_domain *pd
);

🎀 ARGUMENTS 🎀

• pd — the performance domain for which this must be done, fr fr 🫶

🦋 DESCRIPTION 🦋

okay so to use this function, the rcu_read_lock should be held 🔒 — yes, that’s the vibe check.

After the usage of the performance states table is finished, the rcu_read_unlock should be called. Do not skip that part, bestie 😭💀

🌸 RETURN 🌸

It returns the pointer to the performance states table of the performance domain 👑✨

🔥 SEE ALSO 🔥

• Kernel file ./include/linux/energy_model.h
• struct em_perf_state(9)
• struct em_perf_table(9)
• struct em_perf_domain(9)
• em_pd_get_efficient_state(9)
• em_cpu_energy(9)
• em_pd_nr_perf_states(9)

okay bye bestie 🫶 — this em_perf_state_from_pd(9) page is from ./include/linux, dated October 2026 💖