Struct GpuTopology 

pub struct GpuTopology {
    pub device_count: usize,
    pub numa_nodes: Vec<Option<u32>>,
    pub probed: bool,
    pub last_updated: Instant,
    /* private fields */
}

GPU topology graph describing all device interconnections.

Fields

device_count: usize

Number of devices in topology.

numa_nodes: Vec<Option<u32>>

NUMA node assignments for each device.

probed: bool

Whether topology has been probed (vs estimated).

last_updated: Instant

Timestamp of last topology update.

Implementations

impl GpuTopology

pub fn new(device_count: usize) -> Self

Create a new topology for N devices.

pub fn set_connection(&mut self, connection: GpuConnection)

Set connection between two devices.

pub fn get_connection( &self, source: usize, destination: usize, ) -> Option<&GpuConnection>

Get connection between two devices.

pub fn best_path(&self, source: usize, destination: usize) -> Vec<usize>

Get best path between two devices (returns intermediate hops).

pub fn neighbors(&self, device: usize) -> Vec<usize>

Get all devices directly connected to a device.

pub fn bisection_bandwidth_gbps(&self) -> f64

Calculate total bisection bandwidth of the topology.

pub fn is_fully_connected(&self) -> bool

Check if all devices have P2P connectivity.

pub fn numa_neighbors(&self, device: usize) -> Vec<usize>

Get devices in the same NUMA domain.

pub fn set_numa_node(&mut self, device: usize, numa_node: u32)

Set NUMA node for a device.

pub fn mark_probed(&mut self)

Mark topology as probed (not estimated).

Trait Implementations

impl Clone for GpuTopology

fn clone(&self) -> GpuTopology

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GpuTopology

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

Formats the value using the given formatter.