ENUM METRIC_EVENT_GROUPS(9)

💅 enum metric_event_groups(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ — this one's a little baby page about enum metric_event_groups, which is literally just a vibes-check for how events inside a pmu_metric should be grouped. that's it. that's the whole lore. 🎀

✨ NAME ✨

enum metric_event_groups — how events within a pmu_metric should be grouped. no cap, that's the entire job description 🫶

🌸 SYNOPSIS 🌸

enum metric_event_groups {
    MetricGroupEvents ,
    MetricNoGroupEvents ,
    MetricNoGroupEventsNmi ,
    MetricNoGroupEventsSmt ,
    MetricNoGroupEventsThresholdAndNmi

};

look at her. five little constants, all lined up, all iconic 👑

💖 Constants 💖

• MetricGroupEvents — the default one, bestie ✨ group events within the metric. that's the standard behavior, the main character energy, the one everybody gets unless you say otherwise.
• MetricNoGroupEvents — do not group events for the metric. that's it, that's the whole instruction 🙈
• MetricNoGroupEventsNmi — don't group events for the metric if the NMI watchdog is enabled. like, conditional queen 💅 the grouping stays off only when that watchdog is up.
• MetricNoGroupEventsSmt — don't group events for the metric if SMT is enabled. same deal, different condition ⭐
• MetricNoGroupEventsThresholdAndNmi — don't group events for the metric thresholds and if the NMI watchdog is enabled. yes, both things: the metric thresholds and the NMI watchdog being enabled 🔥

ngl these are all just "group" vs "don't group" with progressively more conditions attached, so don't overthink it 🧚

🦋 SEE ALSO 🦋

• Kernel file ./tools/perf/pmu-events/pmu-events.h — go read the actual source, iykyk 👑

and that's the page, bestie!! 🫶 this lil gem lives over in ./tools/perf/pmu-events and the docs are stamped October 2026 — slay, see you in the source tree 💜🎀🌈