Enum SchedulePolicy 

pub enum SchedulePolicy {
    KernelStop,
    Fair {
        nice: Nice,
        mode: FairMode,
    },
    Fifo {
        priority: RtPriority,
    },
    RoundRobin {
        priority: RtPriority,
        quantum_ns: u64,
    },
    Deadline(DeadlinePolicy),
}

Base scheduling policy of a thread.

Variants

KernelStop

Per-CPU kernel stopper work, above Deadline and POSIX RT classes.

This class is reserved for runtime-owned workers that implement Linux CPU-stopper semantics. User-facing policy adapters must not construct it.

Fair

EEVDF fair scheduling.

Fields

nice: Nice

Nice-derived weight.

mode: FairMode

Normal, batch, or idle fair semantics.

Fifo

Fixed-priority first-in/first-out scheduling.

Fields

priority: RtPriority

POSIX RT priority.

RoundRobin

Fixed-priority round-robin scheduling.

Fields

priority: RtPriority

POSIX RT priority.

quantum_ns: u64

Per-dispatch quantum in nanoseconds.

Deadline(DeadlinePolicy)

Earliest-deadline-first scheduling with CBS accounting.

Implementations

impl SchedulePolicy

pub const fn validate(self) -> Result<(), TaskError>

Validates policy fields that remain directly constructible through enum variants.

pub const fn fair(nice: Nice, mode: FairMode) -> Self

Creates a fair policy.

pub const fn fifo(priority: RtPriority) -> Self

Creates a FIFO policy.

pub const fn round_robin(priority: RtPriority) -> Self

Creates a round-robin policy with the Linux default 100 ms quantum.

pub const fn round_robin_with_quantum( priority: RtPriority, quantum_ns: u64, ) -> Result<Self, TaskError>

Creates a round-robin policy with an explicit quantum.

pub const fn deadline(policy: DeadlinePolicy) -> Self

Creates a Deadline policy.

pub const fn class_rank(&self) -> u8

Returns the strict scheduler class rank, where smaller values run first.

Linux maps SCHED_IDLE onto fair_sched_class: Normal, Batch, and Idle policy tasks share this rank and compete inside one EEVDF tree. The per-CPU dedicated idle thread is not a policy class and remains the dispatch layer’s last-choice fallback.

Trait Implementations

impl Clone for SchedulePolicy

fn clone(&self) -> SchedulePolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SchedulePolicy

impl Debug for SchedulePolicy

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

Formats the value using the given formatter.

impl Default for SchedulePolicy

fn default() -> Self

Returns the “default value” for a type.

impl Eq for SchedulePolicy

impl PartialEq for SchedulePolicy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SchedulePolicy