Struct PlacementForkPathfinder

Source

pub struct PlacementForkPathfinder;

Expand description

The PR-A4 deliberate-fork pathfinder, re-expressed as a registered Pathfinder. Scans the ranked plan for nodes the placement DP / ranker admitted with ≥2 distinct (backend, device) placements — a genuine placement choice — and records each as ONE Op::Branch via the fuel-graph A1 builders (arm-0 = the DP winner, arm-1 = the runner-up clone, orphaned so the live data flow is untouched and the realize result is identical).

This is the same logic the pre-B3 seed_placement_fork_branches free function ran — moved verbatim behind the trait. The deliberate-fork gate (real ≥2-placement choice, a producer to diverge from, exactly one consumer to reconverge at) is unchanged, so the fewness gate still holds and a CPU-only build emits zero branches.

No DEFAULT_MAX_N / fixed top-N anywhere — the bound is the per-device frontier the plan already carries; this pass reads the winner + the first distinct-placement runner-up off that set.

PlacementForkPathfinder

Struct PlacementForkPathfinder Copy item path

Trait Implementations§

impl Pathfinder for PlacementForkPathfinder

fn name(&self) -> &'static str

fn propose( &self, graph: &mut Graph, ctx: &OptimizationContext<'_>, ) -> Result<()>

Auto Trait Implementations§

impl Freeze for PlacementForkPathfinder

impl RefUnwindSafe for PlacementForkPathfinder

impl Send for PlacementForkPathfinder

impl Sync for PlacementForkPathfinder

impl Unpin for PlacementForkPathfinder

impl UnsafeUnpin for PlacementForkPathfinder

impl UnwindSafe for PlacementForkPathfinder

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DTwhere ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DTwhere ST: ?Sized, DT: ?Sized,

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

fn in_current_span(self) -> Instrumented<Self> ⓘ

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘwhere F: FnOnce(&Self) -> bool,

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> Read<Exclusive, BecauseExclusive> for Twhere T: ?Sized,

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = !

fn try_from(value: U) -> Result<T, !>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘwhere S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Struct PlacementForkPathfinder

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,