Struct AMXTimingConfig 

pub struct AMXTimingConfig {
    pub matrix_sizes: Vec<usize>,
    pub interleave_memory_ops: bool,
    pub von_neumann_debias: bool,
}

Configuration for AMX timing entropy collection.

Example

// Use defaults (recommended)
let config = AMXTimingConfig::default();

// Or customize
let config = AMXTimingConfig {
    matrix_sizes: vec![32, 128],       // only two sizes
    interleave_memory_ops: true,
    von_neumann_debias: true,
};

Fields

matrix_sizes: Vec<usize>

Matrix dimensions to cycle through for SGEMM dispatches.

Different sizes stress different AMX pipeline configurations:

• Small (16-32): register-bound, fast dispatch
• Medium (48-64): L1-cache-bound
• Large (96-128): L2/SLC-bound, higher memory bandwidth pressure

Must be non-empty. Each value is used as both M, N, and K dimensions.

Default: [16, 32, 48, 64, 96, 128]

interleave_memory_ops: bool

Interleave volatile memory reads/writes between AMX dispatches.

This thrashes a 64KB scratch buffer between matrix operations, disrupting the AMX pipeline state and preventing it from settling into a steady-state pattern. Increases min-entropy at the cost of slightly higher CPU usage.

Default: true

von_neumann_debias: bool

Apply Von Neumann debiasing to raw timing deltas.

The AMX timing source has severe bias. Von Neumann debiasing pairs consecutive deltas and discards equal pairs, emitting one unbiased bit per unequal pair. This costs ~50% of the raw data but dramatically improves min-entropy.

Default: true

Trait Implementations

impl Clone for AMXTimingConfig

fn clone(&self) -> AMXTimingConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AMXTimingConfig

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

Formats the value using the given formatter.

impl Default for AMXTimingConfig

fn default() -> Self

Returns the “default value” for a type.