Struct NumaTopology 

pub struct NumaTopology { /* private fields */ }

NUMA topology information for the system.

Provides information about NUMA nodes, which CPUs belong to each node, and memory available per node.

Implementations

impl NumaTopology

pub fn detect() -> Self

Detect the system’s NUMA topology.

Uses the best available method for the platform:

• Linux: Reads from sysfs (/sys/devices/system/node/)
• Other: Returns a single-node topology

This method never fails - it falls back to a single-node topology if detection fails.

pub fn num_nodes(&self) -> usize

Returns the number of NUMA nodes.

pub fn cpus_for_node(&self, node: usize) -> &[usize]

Returns the CPUs belonging to a specific NUMA node.

Returns an empty slice if the node ID is invalid.

pub fn node_for_cpu(&self, cpu: usize) -> usize

Returns the NUMA node for a given CPU.

Returns 0 if the CPU ID is invalid.

pub fn current_node(&self) -> usize

Returns the NUMA node for the current CPU.

pub fn bind_local_memory(&self) -> Result<(), NumaError>

Bind the current thread’s memory allocations to its local NUMA node.

This should be called AFTER set_cpu_affinity() so that current_node() returns the correct node.

Errors

Returns NumaError::BindFailed if the set_mempolicy syscall fails.

pub fn current_cpu() -> usize

Returns the current CPU ID.

Trait Implementations

impl Clone for NumaTopology

fn clone(&self) -> NumaTopology

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NumaTopology

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

Formats the value using the given formatter.