Struct Mamba2Cache 

pub struct Mamba2Cache {
    pub conv_bvk: Tensor<3>,
    pub ssm_bhpr: Tensor<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 Mamba2::step.

Fields

conv_bvk: Tensor<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<4>

SSM hidden state hₜ.

This is the O(per_head_dim·state_rank) 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. [batch, nheads, per_head_dim, state_rank] in the paper’s notation), which is the transpose of the mathematical hₜ ∈ ℝ^{state_rank×per_head_dim} but equivalent in content.

Shape: [batch, nheads, per_head_dim, state_rank]

Implementations

impl Mamba2Cache

pub fn sanity(&self)

Run the NaN/Inf guards on every cached tensor.

Trait Implementations

impl AutodiffModule for Mamba2Cache

fn valid(&self) -> Self

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

fn from_inner(module: Self) -> Self

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

impl Clone for Mamba2Cache

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Mamba2Cache

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

Formats the value using the given formatter.

impl Display for Mamba2Cache

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

Formats the value using the given formatter.

impl Module for Mamba2Cache

fn num_params(&self) -> usize

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

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

Visit each tensor parameter in the module with a visitor.

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

Map each tensor parameter in the module with a mapper.

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

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

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

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

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

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

fn devices(&self) -> Vec<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(self) -> Self

where Self: AutodiffModule,

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.

fn into_record(self) -> ModuleRecord

where Self: Sized,

Collect this module’s parameters into a ModuleRecord.

fn try_load_record(self, record: ModuleRecord) -> Result<Self, RecordError>

where Self: Sized,

Apply a ModuleRecord to this module, returning the loaded module.

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

where Self: Sized,

Apply a ModuleRecord to this module, consuming and returning it.

impl ModuleDisplay for Mamba2Cache

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 ModuleDisplayDefault for Mamba2Cache

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.