Enum JacobianEngine 

pub enum JacobianEngine {
    Lanes,
    Reverse {
        sweeps: usize,
    },
}

Which engine built a ladder’s ∂q/∂z.

Chosen per calibration by the router: the ladder’s size against REVERSE_FROM, then whether a recording is already open on the thread. Reported on the provenance so the route a ladder took can be read and asserted, and because the sweep count is the number a reader weighing the reverse engine’s memory wants.

Variants

Lanes

⌈n/8⌉ tape-free forward passes, eight pillars seeded per pass.

Reverse

One reverse recording of every rung, read back in sweeps vector sweeps over that recording — one when the adjoint buffer fits ADJOINT_BUDGET_BYTES, more when it is read back in blocks.

Fields

sweeps: usize

How many vector sweeps the read-back took.

Trait Implementations

impl Clone for JacobianEngine

fn clone(&self) -> JacobianEngine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for JacobianEngine

impl Debug for JacobianEngine

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

Formats the value using the given formatter.

impl Eq for JacobianEngine

impl PartialEq for JacobianEngine

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for JacobianEngine