Enum MatmulStrategy 

pub enum MatmulStrategy {
    Simple,
    BlockReuse,
    ReuseMcast,
}

The program STRATEGY the compiler picks for a matmul — the same decision the vendor’s op-library makes. Both are correct; they trade differently: Simple streams one tile at a time (best overlap of DRAM and compute — wins when the problem is compute/latency-bound), BlockReuse holds operand blocks in L1 and reuses them across a DST sub-block (fewer DRAM reads — wins when the problem is DRAM-bandwidth-bound, i.e. large per-core output blocks). Choosing wrong is a real perf bug: at 640³ BlockReuse measures ~12,097 device cycles vs Simple’s 9,735, so the compiler must pick Simple there.

Variants

Simple

One matmul_tiles per output tile, streamed — maximum DRAM/compute overlap.

BlockReuse

Block-reuse (a DST sub-block held while operands are reused) — fewer DRAM reads, for large blocks. Without multicast every core re-reads its blocks from DRAM, so this can LOSE to Simple (the redundant reads outweigh the reuse); it is retained only for 1-D grids where ReuseMcast cannot exploit both a row and a column of receivers.

ReuseMcast

Block-reuse + NOC multicast: each operand block is read from DRAM once and multicast across its row/column. Strictly fewer DRAM reads than BlockReuse (same L1 reuse), and the plan that closes the gap to the vendor’s hand-optimized op on a genuine 2-D worker grid.

Trait Implementations

impl Clone for MatmulStrategy

fn clone(&self) -> MatmulStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MatmulStrategy

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

Formats the value using the given formatter.

impl PartialEq for MatmulStrategy

fn eq(&self, other: &MatmulStrategy) -> 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 Copy for MatmulStrategy

impl Eq for MatmulStrategy

impl StructuralPartialEq for MatmulStrategy