Struct SizeClassOccupancy 

pub struct SizeClassOccupancy {
    pub active_pages: usize,
    pub empty_pages: usize,
    pub live_allocations: usize,
    pub total_slots: usize,
}

Occupancy counters for a single size class in the current thread allocator.

Fields

active_pages: usize

Pages holding at least one live allocation.

empty_pages: usize

Pages with no live allocation, retained for reuse rather than returned, so a refill of this size class costs no syscall.

live_allocations: usize

Allocations currently handed out from this size class.

total_slots: usize

Slots across all pages of this size class, live or free.

Against Self::live_allocations this gives the class’s internal fragmentation: a large gap means pages are pinned by a few scattered survivors.

Trait Implementations

impl Clone for SizeClassOccupancy

fn clone(&self) -> SizeClassOccupancy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SizeClassOccupancy

impl Debug for SizeClassOccupancy

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

Formats the value using the given formatter.

impl Default for SizeClassOccupancy

fn default() -> SizeClassOccupancy

Returns the “default value” for a type.

impl Eq for SizeClassOccupancy

impl PartialEq for SizeClassOccupancy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SizeClassOccupancy