Struct OwdTrendDetector 

pub struct OwdTrendDetector { /* private fields */ }

OWD trend detector using linear regression over a ring buffer.

Stores (sequence, owd_us) samples and computes the slope via least-squares regression. The slope (µs/s) indicates whether queuing delay is increasing (congestion) or stable.

Implementations

impl OwdTrendDetector

pub fn new(capacity: usize) -> Self

pub fn clear(&mut self)

Clear all samples, keeping the same capacity.

pub fn push(&mut self, seq: u32, owd_us: i64)

Add an OWD sample.

seq is a monotonic sequence number (e.g., truncated frame counter). owd_us is the relative one-way delay in microseconds (R_i - S_i).

pub fn trend_us_per_sec(&self) -> i32

Compute the OWD trend as a slope in µs/second.

Uses simple linear regression: slope = Σ((x-x̄)(y-ȳ)) / Σ((x-x̄)²) where x = sequence number and y = owd_us.

Returns 0 if fewer than 2 samples.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool