CPUPOWER-SET(1)

✨ NAME ✨

okay so the manual name is cpupower-set 💖 and it's basically the tool that sets processor power-related kernel or hardware configurations 🔥

💅 SYNOPSIS 💅

cpupower set [ -b VAL | -e POLICY | -m MODE | -t BOOL ]

🌸 DESCRIPTION 🌸

okay bestie, cpupower set is how you change kernel configurations or poke hardware registers that affect processor power saving policies ✨ it's giving control 😭

some options are platform wide and some only affect single cores 🦋 by default, values get applied on all cores. if you want to modify single core configurations, check the --cpu option section in the cpupower(1) manpage 🧚 and the Options sections tell you whether an option affects the whole system or can be applied to individual cores 💜

wanna read out your current settings and see whether they're even supported on your system? use cpupower info 🙈

👑 OPTIONS 👑

• --perf-bias, -b — okay this one sets a register on supported Intel processors so software can tell the processor how much it cares about performance versus energy savings 💖 valid numbers are 0-15, where 0 is maximum performance and 15 is maximum energy efficiency 🔥

the processor uses this hint in model-specific ways when it has to pick trade-offs between performance and energy efficiency 🌈 it does not override Processor Performance states (P-states) or CPU Idle power states (C-states), but it lets software have influence where it otherwise couldn't express a preference ✨

for example, this setting might tell the hardware how aggressively to control frequency in the "turbo range" above the explicitly OS-controlled P-state frequency range, or how aggressively it should enter the OS requested C-states 🦋

this option can be applied to individual cores only via the --cpu option, cpupower(1) 🎀

heads up: setting the performance bias on one CPU can modify the setting on related CPUs too (like all CPUs on one socket) because of hardware restrictions 😭 use cpupower -c all info -b to verify 🫶

this option needs the msr kernel driver (CONFIG_X86_MSR) loaded 💀

• --epp, -e — sets the energy performance policy preference on supported Intel or AMD processors that use the Intel or AMD P-State cpufreq driver respectively 💅

wanna see which policies are available? run cat /sys/devices/system/cpu/cpufreq/policy0/energy_performance_available_preferences 🍓 the options are:

default performance balance_performance balance_power power

• --amd-pstate-mode, -m — sets the AMD P-State mode for supported AMD processors 🌸 available modes are "active", "guided" or "passive" ✨

for further info, check out the AMD P-State kernel documentation 📚

• --turbo-boost, --boost, -t — enables or disables the boost feature on supported Intel and AMD processors, plus other boost-supported systems 🚀 (--boost is an alias for --turbo-boost, so they're the same vibe 👯)

this option takes either 1 to enable or 0 to disable the feature 💜

🧚 SEE ALSO 🧚

cpupower-info(1), cpupower-monitor(1), powertop(1) 🦋

🫶 AUTHORS 🫶

--perf-bias parts written by Len Brown <len.brown@intel.com> and Thomas Renninger <trenn@suse.de> 💖

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okay that's the whole tea, bestie 🎀 this is cpupower from the cpupower Manual (dated 22/02/2011) — now go make your processor slay responsibly ✨💅🌈