Struct L3Domain 

pub struct L3Domain {
    pub size_bytes: u64,
    pub mask: AffinityMask,
    pub core_count: u16,
}

A set of cores sharing one L3 cache instance.

On chiplet AMD parts a domain is a CCD (a 5950X has two 32 MiB domains on one socket), on hybrid Intel the E-core clusters form their own domains, and on X3D-style parts ONE domain carries the big cache. Cross-domain core-to-core latency is significantly higher than within a domain, so this is the granularity at which games should place cooperating threads.

Domains are content-keyed during detection (by the lowest member LP of the cache’s shared set) - never attributed per socket and never deduplicated by size, both of which silently collapse multi-CCD parts into one domain.

Fields

size_bytes: u64

Size of this L3 instance in bytes.

mask: AffinityMask

The LPs (OS ids) sharing this L3 instance.

core_count: u16

Physical cores in this domain (SMT siblings counted once).

Trait Implementations

impl Clone for L3Domain

fn clone(&self) -> L3Domain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for L3Domain

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

Formats the value using the given formatter.