is_sysfs_pmu_core(9)

💖 NAME 💖

okay bestie, welcome to the is_sysfs_pmu_core(9) page from the Kernel API Manual 🎀. So is_sysfs_pmu_core is here for this exact situation: PMU CORE devices have a different name other than cpu in sysfs on some platforms — think ARM or Intel hybrid 🌸. It’s looking for the possible cpus file in the sysfs files to identify whether this is a core device. No cap, that’s the vibe check 🔥.

✨ SYNOPSIS ✨

int is_sysfs_pmu_core (const char *name );

🎀 ARGUMENTS 🎀

• name — the PMU name such as "cpu_atom" 💅. That’s the string you’re handing over, bestie.

🦋 SEE ALSO 🦋

the kernel file is ./tools/perf/util/pmu.c, and the whole squad is:

• struct perf_pmu_alias(9)
• perf_pmu__match_wildcard(9)
• perf_pmu__match_ignoring_suffix_uncore(9)
• perf_pmu__match_wildcard_uncore(9)
• is_pmu_core(9)
• perf_pmu__name_wildcard_match(9)
• perf_pmu__name_no_suffix_match(9)

okay bye bestie 🫶 this page comes from ./tools/perf/util, dated October 2026, and it’s literally the is_sysfs_pmu_core(9) page — slay ✨💜