Struct StepMetrics 

pub struct StepMetrics {

    pub total_us: u64,
    pub command_processing_us: u64,
    pub propagator_us: Vec<(String, u64)>,
    pub snapshot_publish_us: u64,
    pub memory_bytes: usize,
    pub sparse_retired_ranges: u32,
    pub sparse_pending_retired: u32,
    pub sparse_reuse_hits: u32,
    pub sparse_reuse_misses: u32,
    pub queue_full_rejections: u64,
    pub tick_disabled_rejections: u64,
    pub rollback_events: u64,
    pub tick_disabled_transitions: u64,
    pub worker_stall_events: u64,
    pub ring_not_available_events: u64,
    pub ring_eviction_events: u64,
    pub ring_stale_read_events: u64,
    pub ring_skew_retry_events: u64,
}

Timing and memory metrics collected during a single tick.

All durations are in microseconds. The engine populates these fields after each step() call; consumers (telemetry, backoff logic) read them from the most recent tick.

Fields

total_us: u64

Wall-clock time for the entire tick, in microseconds.

command_processing_us: u64

Time spent processing the ingress command queue, in microseconds.

propagator_us: Vec<(String, u64)>

Per-propagator execution times: (name, microseconds).

snapshot_publish_us: u64

Time spent publishing the snapshot to the ring buffer, in microseconds.

memory_bytes: usize

Memory usage of the arena after the tick, in bytes.

sparse_retired_ranges: u32

Number of sparse segment ranges available for reuse.

sparse_pending_retired: u32

Number of sparse segment ranges pending promotion (freed this tick).

sparse_reuse_hits: u32

Number of sparse alloc() calls that reused a retired range this tick.

sparse_reuse_misses: u32

Number of sparse alloc() calls that fell through to bump allocation this tick.

queue_full_rejections: u64

Cumulative number of ingress rejections due to full queue.

tick_disabled_rejections: u64

Cumulative number of ingress rejections due to tick-disabled state.

rollback_events: u64

Cumulative number of rollback events.

tick_disabled_transitions: u64

Cumulative number of transitions into tick-disabled state.

worker_stall_events: u64

Cumulative number of worker stall force-unpin events.

ring_not_available_events: u64

Cumulative number of ring “not available” events.

ring_eviction_events: u64

Cumulative number of snapshot evictions due to ring overwrite.

ring_stale_read_events: u64

Cumulative number of stale/not-yet-written position reads.

ring_skew_retry_events: u64

Cumulative number of reader retries caused by overwrite skew.

Trait Implementations

impl Clone for StepMetrics

fn clone(&self) -> StepMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StepMetrics

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

Formats the value using the given formatter.

impl Default for StepMetrics

fn default() -> StepMetrics

Returns the “default value” for a type.