em_pd_get_efficient_state(9)

💖 NAME — em_pd_get_efficient_state(9) 💖

okay so bestie, welcome to the Kernel API Manual page for em_pd_get_efficient_state(9). This one is literally about getting an efficient performance state from the EM. ✨

em_pd_get_efficient_state — Get an efficient performance state from the EM.

🌸 SYNOPSIS 🌸

int em_pd_get_efficient_state (struct em_perf_state *table , struct em_perf_domain *pd , unsigned long max_util );

✨ ARGUMENTS ✨

• table — List of performance states, in ascending order. Yep, ascending is the vibe. 🦋
• pd — performance domain for which this must be done.
• max_util — Max utilization to map with the EM.

🎀 DESCRIPTION 🎀

It is called from the scheduler code quite frequently and as a consequence doesn't implement any check. 💅

no checks, no cap — it’s getting called a lot from scheduler code, so it keeps things bare. 🫶

🔥 RETURN 🔥

An efficient performance state id, high enough to meet max_util requirement. 👑

💜 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_cpu_energy(9)
• em_pd_nr_perf_states(9)
• em_perf_state_from_pd(9)

and that’s the whole page, bestie 🎀 — source/version line says ./include/linux, dated October 2026, and it signs off with em_pd_get_efficient_state(9). slay. 💖✨