Struct RttShape 

pub struct RttShape { /* private fields */ }

Streaming RTT-distribution shape estimator.

Implementations

impl RttShape

pub fn new() -> Self

pub fn observe(&mut self, rtt_us: f64)

Fold one RTT sample (microseconds) into the running moments via Pebay’s streaming update of the first four central moments.

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

Sarle’s bimodality coefficient b = (skewness^2 + 1) / kurtosis, or None until MIN_SAMPLES samples and a non-degenerate spread. b is bounded 0..=1; above SARLE_THRESHOLD the distribution is bimodal.

pub fn wifi_confidence(&self) -> f32

Confidence in 0..=1 that the path carries a Wi-Fi hop, from how far the bimodality coefficient sits above Sarle’s threshold. 0 below threshold (unimodal - wired) or before enough samples; rising to 1 as the RTT distribution becomes strongly two-peaked (Wi-Fi MAC retransmission).

pub fn samples(&self) -> u64

Samples folded so far (diagnostics).

Trait Implementations

impl Clone for RttShape

fn clone(&self) -> RttShape

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RttShape

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

Formats the value using the given formatter.

impl Default for RttShape

fn default() -> RttShape

Returns the “default value” for a type.