STRUCT PIE_VARS(9)

💅 struct pie_vars(9) — like, the Kernel API Manual, bestie ✨

okay so this is a page straight out of the Kernel API Manual and it's all about struct pie_vars — yes, that's struct pie_vars(9) if you're being formal about it 🎀. Think of it as the lil' dashboard of numbers that PIE keeps its eyes on. No cap, it's giving "control panel energy" 👑

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🌸 NAME 🌸

struct pie_vars — literally just, it contains pie variables 🥧✨

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🦋 SYNOPSIS 🦋

struct pie_vars {
    psched_time_t qdelay;
    psched_time_t qdelay_old;
    psched_time_t burst_time;
    psched_time_t dq_tstamp;
    u64 prob;
    u64 accu_prob;
    u64 dq_count;
    u32 avg_dq_rate;
    u32 backlog_old;
 };

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💖 Members 💖

okay bestie, member-by-member, let's go 🫶

• qdelay — the current queue delay. the now-now number 👀
• qdelay_old — the queue delay from the previous qdelay calculation. it's the throwback version 💅
• burst_time — burst time allowance. how much burst we're allowed to have, iconic
• dq_tstamp — the timestamp at which the dq rate was last calculated. like a little "last updated" sticker on it ⏰
• prob — drop probability 🍓
• accu_prob — accumulated drop probability. the prob but with receipts 🧾
• dq_count — number of bytes dequeued in a measurement cycle. bytes, counted, periodt 🔥
• avg_dq_rate — the calculated average dq rate. math girlie behaviour, honestly 🌈
• backlog_old — queue backlog during the previous qdelay calculation. again: the old one, the flashback one 💀

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🌟 SEE ALSO 🌟

the kernel file ./include/net/pie.h, plus its besties struct pie_params(9), struct pie_stats(9), and struct pie_skb_cb(9) — go say hi, iykyk 💜

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ngl it's a struct, so it's not doing anything dramatic on its own — it just holds these variables. read the friend pages above for the whole lore 🧚

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and that's the whole page, bestie 💖 this one lives over in ./include/net, stamped October 2026 — so like, future-dated and fabulous ⭐👑 signed off with love from the kernel docs ✨🎀