Struct RunMetrics 

pub struct RunMetrics {
    pub cache_hits: AtomicU64,
    pub cache_misses: AtomicU64,
    pub cache_hit_tokens: AtomicU64,
    pub last_entropy: AtomicU32,
    pub low_entropy_tokens: AtomicU64,
    pub total_sampled_tokens: AtomicU64,
    pub baseline_free_bytes: AtomicUsize,
    pub kernel_audit: Mutex<Vec<(String, String, bool, &'static Location<'static>)>>,
    /* private fields */
}

2026-09-26: The process’s run mailbox.

Fields

cache_hits: AtomicU64

cache_misses: AtomicU64

cache_hit_tokens: AtomicU64

last_entropy: AtomicU32

2026-09-26: Most recent per-token entropy, as f32 bits.

low_entropy_tokens: AtomicU64

total_sampled_tokens: AtomicU64

baseline_free_bytes: AtomicUsize

2026-09-26: The free-memory baseline set_baseline_free_bytes records after the backend is built. KV sizing uses it only when neither METRALE_KV_EXTERNAL_RESERVE_GB nor the allocation ledger applies: it measures this process’s use as baseline - free_now and charges the smaller of that and the known footprint (factory/build/kv_budget.rs). 0 means unset.

kernel_audit: Mutex<Vec<(String, String, bool, &'static Location<'static>)>>

2026-09-26: (module, func, loaded, dispatch site) for every lookup crate::kernel_audit::record received this run. The site is the caller’s Location, carried through #[track_caller] on GpuBackend::kernel.

Trait Implementations

impl Debug for RunMetrics

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

Formats the value using the given formatter.

impl Default for RunMetrics

fn default() -> RunMetrics

Returns the “default value” for a type.