STRUCT PSTATE_DATA(9)

💖 struct pstate_data(9) 💖

okay bestie, welcome to the Kernel API Manual glow-up ✨ this one's all about struct pstate_data, and it's giving "per-CPU P-state lore" in the best way possible 🎀

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✨ NAME ✨

struct pstate_data — literally the place where P state data is stored, no cap 💅

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🦋 SYNOPSIS 🦋

here's the struct in all its iconic glory, copy it exactly bestie:

struct pstate_data {
    int current_pstate;
    int min_pstate;
    int max_pstate;
    int max_pstate_physical;
    int perf_ctl_scaling;
    int scaling;
    int turbo_pstate;
    unsigned int min_freq;
    unsigned int max_freq;
    unsigned int turbo_freq;
 };

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👑 Members 👑

• current_pstate — the current requested P state, aka the main character of the moment 🌟
• min_pstate — the minimum P state this platform can even do, the floor bestie 🫶
• max_pstate — the maximum P state this platform can do, the ceiling ✨
• max_pstate_physical — this is the physical max P state for a processor 💀 and yes, it can be higher than max_pstate, because max_pstate can be limited by platform thermal design power limits — thermal said "not today" 🌡️
• perf_ctl_scaling — the PERF_CTL P-state to frequency scaling factor, math but make it slay 🔥
• scaling — the scaling factor between performance and frequency, the vibe check between the two ⚖️
• turbo_pstate — the max Turbo P state possible for this platform, zoom zoom 🏎️
• min_freq — the min_pstate frequency in cpufreq units, frequency but tiny 🍓
• max_freq — the max_pstate frequency in cpufreq units, frequency but big 🌈
• turbo_freq — the turbo_pstate frequency in cpufreq units, frequency but turbo-charged ⚡

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🌸 Description 🌸

so what does this struct actually do? it stores the per cpu model P state limits and the current P state. that's it, that's the tea ☕ — per-CPU model limits plus the current state, all cozy in one struct 💜

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/cpufreq/intel_pstate.c
• struct sample(9)
• struct vid_data(9)
• struct global_params(9)
• struct cpudata(9)
• struct pstate_funcs(9)

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bestie if you're touching this struct, you're already in the cpufreq deep end — hydrate and read the whole file, fr fr 😭💖

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kisses and good vibes from the ./drivers/cpufreq girlies 🫶✨ this page is brought to you by the Kernel API Manual, dated October 2026, and yes it's still struct pstate_data(9) — periodt 💅👑