Enum LocalDevices 

pub enum LocalDevices {
    All,
    Explicit(Vec<u8>),
}

CUDA device indices on a host. Either explicit (a list of indices) or the "all" shorthand (auto-detect at startup on that host).

local_devices: all defers device-index resolution to startup on whichever host the value lives on. The host uses cuda_device_count() and binds devices 0..ranks.len() (sequential from index 0). The detected count must be at least as large as ranks.len(), otherwise rendezvous errors loudly.

local_devices: [0, 1] is the explicit form; same as before this shorthand existed.

Symmetric: works for both the controller host and remote nodes. Pair with explicit ranks: [N, N+1, ...] to define the world topology; local_devices only selects which device indices on this host map to those ranks.

Variants

All

Auto-detect at startup on this host. Indices 0..ranks.len() bound.

Explicit(Vec<u8>)

Explicit list of CUDA device indices, paired positionally with ranks.

Implementations

impl LocalDevices

pub fn is_all(&self) -> bool

True for the auto-detect form (unresolved).

pub fn as_explicit(&self) -> Option<&[u8]>

Explicit indices as a slice, or None for All.

Trait Implementations

impl Clone for LocalDevices

fn clone(&self) -> LocalDevices

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LocalDevices

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LocalDevices

fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Eq for LocalDevices

impl PartialEq for LocalDevices

fn eq(&self, other: &LocalDevices) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for LocalDevices

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LocalDevices