Struct Mamba2Cache 

pub struct Mamba2Cache<B: Backend> {
    pub conv_bvk: Tensor<B, 3>,
    pub ssm_bhpr: Tensor<B, 4>,
}

The mutable state carried between decoding steps for a single Mamba-2 layer.

Both tensors are updated in-place (via Burn’s functional clone) at every call to [crate::mamba2::Mamba2::step].

Fields

conv_bvk: Tensor<B, 3>

Convolution rolling window.

Stores the last conv_kernel pre-activation feature vectors fed into the depthwise Conv1d. At each step, the oldest column is discarded and the new token’s projection is appended (a left-shift followed by an insert into the rightmost column), maintaining strict causality.

Shape: [batch, conv_dim, conv_kernel]

• conv_dim = d_inner + 2 · ngroups · state_rank
• conv_kernel is typically 4

ssm_bhpr: Tensor<B, 4>

SSM hidden state hₜ.

This is the O(P·N) compressed summary of all tokens seen so far. Updated via hₜ = Āₜ hₜ₋₁ + B̄ₜ xₜ at each decoding step.

The tensor is indexed as [batch, nheads, per_head_dim, state_rank] (i.e. [B, H, P, N] in the paper’s notation), which is the transpose of the mathematical hₜ ∈ ℝ^{N×P} but equivalent in content.

Shape: [batch, nheads, per_head_dim, state_rank]

Implementations

impl<B: Backend> Mamba2Cache<B>

pub fn sanity(&self)

Trait Implementations

impl<B> AutodiffModule<B> for Mamba2Cache<B>

where B: AutodiffBackend + Backend, <B as AutodiffBackend>::InnerBackend: Backend,

type InnerModule = Mamba2Cache<<B as AutodiffBackend>::InnerBackend>

Inner module without auto-differentiation.

fn valid(&self) -> Self::InnerModule

Returns the same module, but on the inner backend without auto-differentiation.

fn from_inner(module: Self::InnerModule) -> Self

Wraps an inner module back into an auto-diff module.

impl<B: Backend> Clone for Mamba2Cache<B>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B: Debug + Backend> Debug for Mamba2Cache<B>

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

Formats the value using the given formatter.

impl<B: Backend> Display for Mamba2Cache<B>

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

Formats the value using the given formatter.

impl<B> HasAutodiffModule<B> for Mamba2Cache<B::InnerBackend>

where B: AutodiffBackend + Backend, <B as AutodiffBackend>::InnerBackend: Backend,

type TrainModule = Mamba2Cache<B>

The module with auto-differentiation.

impl<B: Backend> Module<B> for Mamba2Cache<B>

type Record = Mamba2CacheRecord<B>

Type to save and load the module.

fn load_record(self, record: Self::Record) -> Self

Load the module state from a record.

fn into_record(self) -> Self::Record

Convert the module into a record containing the state.

fn num_params(&self) -> usize

Get the number of parameters the module has, including all of its sub-modules.

fn visit<Visitor: ModuleVisitor<B>>(&self, visitor: &mut Visitor)

Visit each tensor parameter in the module with a visitor.

fn map<Mapper: ModuleMapper<B>>(self, mapper: &mut Mapper) -> Self

Map each tensor parameter in the module with a mapper.

fn collect_devices(&self, devices: Devices<B>) -> Devices<B>

Return all the devices found in the underneath module tree added to the given vector without duplicates.

fn to_device(self, device: &B::Device) -> Self

Move the module and all of its sub-modules to the given device.

fn fork(self, device: &B::Device) -> Self

Fork the module and all of its sub-modules to the given device.

fn devices(&self) -> Vec<<B as BackendTypes>::Device>

Return all the devices found in the underneath module tree without duplicates.

fn no_grad(self) -> Self

Each tensor in the module tree will not require grad.

fn train<AB>(self) -> Self::TrainModule

where AB: AutodiffBackend<InnerBackend = B>, Self: HasAutodiffModule<AB>,

Move the module and all of its sub-modules to the autodiff backend.

fn quantize_weights(self, quantizer: &mut Quantizer) -> Self

Quantize the weights of the module.

impl<B: Backend> ModuleDisplay for Mamba2Cache<B>

fn format(&self, passed_settings: DisplaySettings) -> String

Formats the module with provided display settings.

fn custom_settings(&self) -> Option<DisplaySettings>

Custom display settings for the module.

fn custom_content(&self, _content: Content) -> Option<Content>

Custom attributes for the module.

impl<B: Backend> ModuleDisplayDefault for Mamba2Cache<B>

fn content(&self, content: Content) -> Option<Content>

Attributes of the module used for display purposes.

fn num_params(&self) -> usize

Gets the number of the parameters of the module.