Struct Pick 

pub struct Pick {
    pub backend: BackendId,
    pub device_index: u32,
    pub kernel_source: &'static str,
    pub kernel_revision_hash: u64,
}

Where the dispatch table decided an op should run, and which kernel sibling won at that decision point.

Per-alternative measurement (2026-06-08): kernel_source surfaces the winning ProfileEntry::kernel_source so consumers (Router, planner, telemetry) can name the actual kernel — critical when multiple alternatives register at (BackendId::Cpu) (e.g. AOCL vs MKL vs portable-cpu) and the (backend, device) pair alone is ambiguous. "" for legacy reports / single-impl cells.

Pick stays Copy (and &'static str is Copy); the picker preserves the string identity by reading it directly from the winning ProfileEntry — its String value is matched against the well-known interned set via kernel_source_intern so the &'static str is the same pointer the binding-table entry carries.

Pick is only ever constructed at runtime by DispatchTable::rebuild_from from in-memory ProfileEntry data — never deserialized from JSON or other owned input. We therefore intentionally do NOT derive Deserialize (the &'static str field can’t be deserialized from owned input). Serialize is also dropped for symmetry; the public serialization surface is ProfileReport / ProfileEntry, and Pick is regenerated by calling DispatchTable::build.

Fields

backend: BackendId

device_index: u32

kernel_source: &'static str

Diagnostic tag from the winning ProfileEntry::kernel_source. "" when no sibling distinguishes the cell.

kernel_revision_hash: u64

Revision of the winning kernel build, from ProfileEntry::kernel_revision_hash. Completes the kernel identity that kernel_source alone (provider-granular) leaves ambiguous among the variant siblings of one provider. 0 when untracked. u64 is Copy, so Pick stays Copy.

Trait Implementations

impl Clone for Pick

fn clone(&self) -> Pick

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Pick

impl Debug for Pick

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

Formats the value using the given formatter.

impl Eq for Pick

impl PartialEq for Pick

fn eq(&self, other: &Pick) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Pick