Struct Stats 

pub struct Stats {
    pub steps: u64,
    pub lifts: u64,
    pub resolves: u64,
    pub native_bodies: u64,
    pub absorbed: u64,
    pub fetch_bytes: u64,
    pub fetch: Duration,
    pub decode_lift: Duration,
    pub optimize: Duration,
    pub forwarded_loads: u64,
    pub removed_stores: u64,
}

Counters and timings for one machine’s run.

Fields

steps: u64

P-code operations retired.

lifts: u64

Times an address had to be lifted: a translation-cache miss.

resolves: u64

Times execution left a block and the target was already lifted: a translation-cache hit at the VM level.

Both counters only see transitions that reach the VM. Most control flow never does: a branch inside the lifted graph is a direct block reference the interpreter follows without consulting any address index, so a steady-state loop performs no translation-cache lookups at all. Read a low resolves next to a high steps as “control flow is already resolved”, not as “the cache is missing”.

native_bodies: u64

Block bodies executed by an installed BlockExecutor rather than interpreted.

absorbed: u64

Blocks folded into a predecessor as a guest basic block was discovered, each one a unit the machine no longer enters and leaves separately.

fetch_bytes: u64

Instruction bytes read from guest memory.

fetch: Duration

Time spent reading instruction bytes.

decode_lift: Duration

Time spent decoding and lowering to QCode.

optimize: Duration

Time spent in the block-local cleanup round.

forwarded_loads: u64

Loads forwarded to their stored value by the cleanup round.

removed_stores: u64

Stores removed by the cleanup round.

Implementations

impl Stats

pub fn translation(&self) -> Duration

Total time in the fetch and translation phases.

pub fn execute(&self, elapsed: Duration) -> Duration

The share of elapsed spent executing rather than translating.

Derived, so it also absorbs whatever the VM spends on its own bookkeeping; it is an upper bound on interpretation cost, not an exact measure of it.

pub fn hit_rate(&self) -> Option<f64>

Translation-cache hit rate over the transitions the VM observed. None when there were no transitions to rate.

pub fn report(&self, elapsed: Duration) -> String

A one-line breakdown suitable for a benchmark to print.

Trait Implementations

impl Clone for Stats

fn clone(&self) -> Stats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Stats

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

Formats the value using the given formatter.

impl Default for Stats

fn default() -> Stats

Returns the “default value” for a type.