Struct ProbeBssCounters 

#[non_exhaustive]
pub struct ProbeBssCounters {

    pub probe_count: u64,
    pub kprobe_returns: u64,
    pub meta_miss: u64,
    pub ringbuf_drops: u64,
    pub timeline_count: u64,
    pub timeline_drops: u64,
    pub pi_count: u64,
    pub pi_orphan_fexits: u64,
    pub pi_class_change_count: u64,
    pub pi_drops: u64,
    pub lock_contend_count: u64,
    pub lock_contend_drops: u64,
    pub preempt_disable_count: u64,
    pub preempt_enable_count: u64,
    pub trigger_count: u64,
}

Cross-CPU sum of every per-CPU diagnostic counter slot in the probe BPF program’s .bss ktstr_pcpu_counters array.

The probe declares one fixed-shape per-CPU array (pcpu_counter ktstr_pcpu_counters[MAX_CPUS][KTSTR_PCPU_NR] — see src/bpf/probe.bpf.c); each tracepoint / kprobe handler bumps a slot via ktstr_pcpu_inc(KTSTR_PCPU_<NAME>). The host reader sums across the CPU axis to recover the cumulative count each handler reports. Field names mirror the slot names from enum ktstr_pcpu_idx so an operator can walk back from the failure-dump field to the probe source by exact name.

All counters are monotonic-since-probe-attach. Zero values indicate either “the corresponding tracepoint never fired” (the common case for pi_* and lock_contend_* on tests that don’t exercise PI / lock contention) or “the tracepoint never attached” (e.g. preempt_* on a kernel without CONFIG_TRACE_PREEMPT_TOGGLE); the counter alone cannot distinguish those two cases — pair with the attach-state surface in crate::probe::process::ProbeDiagnostics when the distinction matters.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

probe_count: u64

KTSTR_PCPU_PROBE_COUNT summed across CPUs — total kprobe fires past the ktstr_enabled gate.

kprobe_returns: u64

KTSTR_PCPU_KPROBE_RETURNS summed across CPUs — kprobe fires that committed an entry to probe_data (past func_meta_map lookup and scratch-slot allocation).

meta_miss: u64

KTSTR_PCPU_META_MISS summed across CPUs — kprobe fires whose IP missed func_meta_map. probe_count - kprobe_returns is the total bail count; meta_miss is the subset whose bail came from the func_meta_map lookup.

ringbuf_drops: u64

KTSTR_PCPU_RINGBUF_DROPS summed across CPUs — failed bpf_ringbuf_reserve calls inside the trigger handler.

timeline_count: u64

KTSTR_PCPU_TIMELINE_COUNT summed across CPUs — successful timeline-event submissions across the three timeline tracepoints (sched_switch + sched_migrate_task + sched_wakeup).

timeline_drops: u64

KTSTR_PCPU_TIMELINE_DROPS summed across CPUs — timeline submissions that failed because the dedicated timeline_events ringbuf was full at submit time.

pi_count: u64

KTSTR_PCPU_PI_COUNT summed across CPUs — PI boost / unboost records committed via fexit/rt_mutex_setprio.

pi_orphan_fexits: u64

KTSTR_PCPU_PI_ORPHAN_FEXITS summed across CPUs — fexit fires whose entry-side snapshot was never recorded (attach race or pi_scratch overflow).

pi_class_change_count: u64

KTSTR_PCPU_PI_CLASS_CHANGE_COUNT summed across CPUs — PI events that observed a sched_class flip from fentry to fexit (e.g. CFS → RT under a boost).

pi_drops: u64

KTSTR_PCPU_PI_DROPS summed across CPUs — TL_EVT_PI_BOOST submissions that failed because the timeline ringbuf was full at the PI fexit handler.

lock_contend_count: u64

KTSTR_PCPU_LOCK_CONTEND_COUNT summed across CPUs — tp_btf/contention_begin fires that committed a TL_EVT_LOCK_CONTEND timeline record.

lock_contend_drops: u64

KTSTR_PCPU_LOCK_CONTEND_DROPS summed across CPUs — TL_EVT_LOCK_CONTEND submissions that failed because the timeline ringbuf was full.

preempt_disable_count: u64

KTSTR_PCPU_PREEMPT_DISABLE_COUNT summed across CPUs — tp_btf/preempt_disable outermost-transition fires.

preempt_enable_count: u64

KTSTR_PCPU_PREEMPT_ENABLE_COUNT summed across CPUs — tp_btf/preempt_enable outermost-transition fires.

trigger_count: u64

KTSTR_PCPU_TRIGGER_COUNT summed across CPUs — every tp_btf/sched_ext_exit fire (including non-error kinds like DONE / UNREG, not just error-class exits).

Trait Implementations

impl Clone for ProbeBssCounters

fn clone(&self) -> ProbeBssCounters

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProbeBssCounters

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ProbeBssCounters

fn default() -> ProbeBssCounters

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProbeBssCounters

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ProbeBssCounters

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.