Enum ShardError 

pub enum ShardError {
    NothingToShard,
    AxisNotDivisible {
        axis: &'static str,
        extent: usize,
        chips: usize,
    },
    SliceNotTileAligned {
        extent: usize,
        chips: usize,
        tile: usize,
    },
    UnsliceableFill {
        tensor: String,
        why: &'static str,
    },
    NoCrossChipHandshake {
        target: &'static str,
    },
    Passes(SpatialReject),
}

Variants

NothingToShard

There is nothing to shard: no matmul, so no contraction axis to split.

AxisNotDivisible

The contraction axis does not divide evenly. Refused rather than rounded — a rounded shard drops or double-counts a slice of the contraction, and the sum of the partials is then quietly wrong.

Fields

axis: &'static str

extent: usize

chips: usize

SliceNotTileAligned

The slice would not be a whole number of native tiles, so a chip’s operand could not be loaded by the tile-addressed movement stages.

Fields

extent: usize

chips: usize

tile: usize

UnsliceableFill

A fill that cannot be sliced faithfully: the shard’s elements would not be the original’s.

Fields

tensor: String

why: &'static str

NoCrossChipHandshake

The target offers no hand-off that crosses a site, so a collective cannot be expressed on it at all — every edge it provides means “these two stages share a site”.

Fields

target: &'static str

Passes(SpatialReject)

The re-run of the pinned passes rejected the sharded program.

Trait Implementations

impl Clone for ShardError

fn clone(&self) -> ShardError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ShardError

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

Formats the value using the given formatter.

impl PartialEq for ShardError

fn eq(&self, other: &ShardError) -> 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 StructuralPartialEq for ShardError