estimate_sustainable_power(9)

✨ estimate_sustainable_power(9) ✨

okay so welcome to the Kernel API Manual, bestie — today’s main character is estimate_sustainable_power(9), and it is literally all about estimating the sustainable power of a thermal zone. 💅

🌸 NAME 🌸

estimate_sustainable_power — estimate the sustainable power of a thermal zone. ✨

✨ SYNOPSIS ✨

the vibe check starts with this signature, exactly:

u32 estimate_sustainable_power (struct thermal_zone_device *tz );

🎀 ARGUMENTS 🎀

• tz — the thermal zone we are operating in. that’s the one, no cap. 🫶

💅 DESCRIPTION 💅

okay so here’s the tea: for thermal zones that don’t provide a sustainable_power in their thermal_zone_params, this function estimates one. it calculates it using the minimum power of all the cooling devices, because that gives a valid value that can give some degree of functionality. lowkey iconic that it can still do something useful, fr fr. 😭💖

for optimal performance of this governor, though? provide a sustainable_power in the thermal zone’s thermal_zone_params. that’s the glow-up. periodt. 👑

🔥 SEE ALSO 🔥

• Kernel file ./drivers/thermal/gov_power_allocator.c
• mul_frac(9)
• div_frac(9)
• struct power_actor(9)
• struct power_allocator_params(9)
• estimate_pid_constants(9)
• get_sustainable_power(9)
• pid_controller(9)
• power_actor_set_power(9)
• divvy_up_power(9)
• get_governor_trips(9)
• check_power_actors(9)
• power_allocator_bind(9)

cute sign-off time 🫶 this page comes from the ./drivers/thermal source/version and is dated October 2026 — estimate_sustainable_power(9) out. 💖🎀