Struct DashAttnConfig

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pub struct DashAttnConfig {
    pub chunk_size: usize,
    pub alpha: f32,
    pub scaling_factor: f32,
    pub sigma: f32,
    pub estimate_diagonal: bool,
}

Expand description

Configuration for DashAttention adaptive sparse hierarchical attention. Controls α-entmax routing, chunk summarization, and routing bias.

Fields ordered by descending alignment to minimize padding: usize (8B) → f32 (4B) → bool (1B) — 24 bytes total, no wasted padding.

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§chunk_size: usize

Chunk size for block-level attention (default: 64).

§alpha: f32

α parameter for entmax. Only α=1.5 supported (quadratic, closed-form).

§scaling_factor: f32

Scaling factor γ applied to chunk logits before entmax (default: 1.0).

§sigma: f32

Prior strength σ for routing bias (default: 1e6, weak prior).

§estimate_diagonal: bool

Whether to estimate diagonal attention contribution (default: true). Tail-packed after f32 group to avoid bool-between-f32 padding.

Trait Implementations§

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impl Clone for DashAttnConfig

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fn clone(&self) -> DashAttnConfig

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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impl Copy for DashAttnConfig

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impl Debug for DashAttnConfig

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

Formats the value using the given formatter. Read more

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impl Default for DashAttnConfig

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl UnwindSafe for DashAttnConfig

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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