Struct NumaBandwidthMatrix 

pub struct NumaBandwidthMatrix {
    pub n_nodes: usize,
    pub bandwidth: Vec<Vec<f64>>,
    pub latency: Vec<Vec<f64>>,
}

NUMA bandwidth matrix: bandwidth[from][to] in GB/s, latency[from][to] in ns.

Fields

n_nodes: usize

Number of NUMA nodes.

bandwidth: Vec<Vec<f64>>

Bandwidth from node i to node j in GB/s. Row-major: [from][to].

latency: Vec<Vec<f64>>

Latency from node i to node j in nanoseconds. Row-major: [from][to].

Implementations

impl NumaBandwidthMatrix

pub fn uniform(n_nodes: usize, bandwidth_gb_s: f64, latency_ns: f64) -> Self

Create a uniform matrix where every (i, j) pair has the same bandwidth and latency. Useful as a single-node fallback.

pub fn get_bandwidth(&self, from: usize, to: usize) -> f64

Get bandwidth from node from to node to in GB/s.

Returns 0.0 if either index is out of range.

pub fn get_latency(&self, from: usize, to: usize) -> f64

Get latency from node from to node to in nanoseconds.

Returns f64::MAX if either index is out of range.

pub fn best_route(&self, src: usize, dst: usize) -> f64

Find the highest-bandwidth route from src to dst.

For a 1-node matrix this is always the diagonal. For multi-node matrices, returns the direct bandwidth (no intermediate hop logic needed for cache-coherent NUMA).

Returns the bandwidth value in GB/s.

pub fn highest_bandwidth_node(&self) -> usize

Find the node with the highest average outgoing bandwidth.

Ties are broken by choosing the lower node index.

pub fn display(&self) -> String

Format the bandwidth matrix as a human-readable table.

pub fn node_count(&self) -> usize

Number of NUMA nodes in this matrix.

Trait Implementations

impl Clone for NumaBandwidthMatrix

fn clone(&self) -> NumaBandwidthMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NumaBandwidthMatrix

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

Formats the value using the given formatter.