libnvme(2)

💖 libnvme(2) — API Manual 💖

okay bestie, welcome to the libnvme manual, page 2, and today's main character is a little struct called nvme_perf_characteristics. she's giving performance attribute energy and honestly? she ate. 🎀

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✨ NAME ✨

struct nvme_perf_characteristics — the Performance attribute structure. that's it, that's her whole job, and she does it flawlessly 💅

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🌸 SYNOPSIS 🌸

struct nvme_perf_characteristics {
    union {
      struct nvme_std_perf_attr std_perf[0];
      struct nvme_perf_attr_id_list id_list[0];
      struct nvme_vs_perf_attr vs_perf[0];
      __u8 attr_buf[4096];
    };
 };

like… look at her. four besties sharing one union, all hanging out at the same memory address, no drama (well, some drama, that's literally how unions work 🫶).

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🦋 Members 🦋

👑 {unnamed_union}

anonymous. literally no name. she's the mysterious one in the group chat who never posts but somehow knows everything. 🙈 the union itself is unnamed, so the members below are just… right there, accessible directly.

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• std_perf — the Standard performance attribute, an array of struct nvme_std_perf_attr. the classy, by-the-book one. ✨
• id_list — the Performance attribute identifier list, an array of struct nvme_perf_attr_id_list. it's giving "here's the lineup, go look them up" energy. 📋
• vs_perf — Vendor specific performance attribute, an array of struct nvme_vs_perf_attr. this one's the custom girlie — whatever your vendor decided to do, no cap. 🧚
• attr_buf — the Attribute buffer, a __u8 array of size 4096. the raw, unfiltered, 4096-bytes-of-just-vibes option. main character energy fr fr. 🔥

heads up bestie: all four of these live in the same union, so they all start at the same address and they all overlap. it's one buffer, four different ways to look at it. pick your lens. 🌈

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and that's the whole page, no skips, no summaries, every single member accounted for 💜

signing off 💌 — this cutie was last touched in July 2026, it belongs to the struct nvme_perf_characteristics corner of the libnvme manual, and yes, she is still serving page 2. periodt. 👑🌸