cpu__get_node(9)

💅 cpu__get_node(9) — like, the Kernel API Manual but make it make sense

okay so bestie, welcome to cpu__get_node 🎀 this is from the Kernel API Manual, and it's genuinely one of the more straightforward ones — no cap.

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✨ NAME ✨

cpu__get_node — returns the numa node X as read from /sys/devices/system/node/nodeX for the given CPU. 🦋

like, that's it. that's the whole vibe. it goes and looks at what the system says the node is for that CPU, no guessing, no drama. iykyk.

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🌸 SYNOPSIS 🌸

int cpu__get_node (struct perf_cpu cpu );

that's the whole signature, periodt. takes a struct perf_cpu called cpu, hands you back an int. iconic behavior honestly.

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💖 ARGUMENTS 💖

• cpu — ngl bestie… the original manpage literally just says -- undescribed -- 😭 like not a single word about it. so that's all we got, and i'm not about to invent lore that isn't there. it's a struct perf_cpu, the signature tells you that much, and the manpage leaves the rest as a mystery 🕵️‍♀️✨

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🔥 SEE ALSO 🔥

okay this is the fun part, the whole friend group is here 👑 if you liked this one, go say hi to:

• Kernel file ./tools/perf/util/cpumap.h cpu_map__is_dummy(9)
• cpu__get_socket_id(9)
• cpu__get_die_id(9)
• cpu__get_cluster_id(9)
• cpu__get_core_id(9)
• cpu_aggr_map__empty_new(9)
• cpu_aggr_map__new(9)
• aggr_cpu_id__socket(9)
• aggr_cpu_id__die(9)
• aggr_cpu_id__cluster(9)
• aggr_cpu_id__core(9)
• aggr_cpu_id__node(9)
• aggr_cpu_id__global(9)

like, the entire topology-adjacent squad 💀 go read them all, they're all eating.

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that's the page!! 🌈 mwah 💜 this lil beauty lives in ./tools/perf/util, and it's dated October 2026 — so mark your calendars bestie, see u then 🫶✨