perf_cpu_map..._or_is_empty(9)

okay so bestie, welcome to the perf_cpu_map..._or_is_empty(9) page 💖 — it’s from the Kernel API Manual, and it’s here to answer one very specific little question for you ✨.

🌸 NAME 🌸

perf_cpu_map__is_any_cpu_or_is_empty — checks if a map is either empty or is the "any CPU"/dummy value. That’s the whole vibe check, no cap 🫶.

🦋 SYNOPSIS 🦋

The signature, exactly as it appears, no touch-ups:

LIBPERF_API bool perf_cpu_map__is_any_cpu_or_is_empty (const struct perf_cpu_map *map );

🎀 ARGUMENTS 🎀

• map — the map you’re checking. The original argument description is literally -- undescribed --, which is giving mysterious main-character energy 🙈. No extra lore on this page, bestie.

The source really does just say -- undescribed -- here, so I’m not gonna invent details 💀.

🌈 SEE ALSO 🌈

The whole SEE ALSO crew, fr fr:

• Kernel file ./tools/lib/perf/include/perf/cpumap.h
• struct perf_cpu(9)
• perf_cpu_map__new_any_cpu(9)
• perf_cpu_map__new_online_cpus(9)
• perf_cpu_map__new(9)
• perf_cpu_map__cpu(9)
• perf_cpu_map__nr(9)
• perf_cpu_map__has_any_cpu_or_is_empty(9)
• perf_cpu_map__is_empty(9)
• perf_cpu_map__min(9)
• perf_cpu_map__max(9)

Cute sign-off time 🎀💜: this page’s source/version is ./tools/lib/perf/include/perf, it’s dated October 2026, and it’s all about perf_cpu_map..._or_is_empty(9) from the Kernel API Manual 🌈💅. Bye bestie, go check those maps! ✨