Enum ParThreshold 

pub enum ParThreshold {
    Derived,
    Fixed(usize),
    Never,
}

Floor of the parallel regions of a factorization family: the one type of every par_threshold field (LU, full-pivoting LU, Bunch-Kaufman, QR with column pivoting, bidiagonalization, Hessenberg and tridiagonal reductions).

The default is Derived: each region is decided by ParShape::pays, its serial time (units of work times the family’s serial throughput, rate) against the dispatch cost of the parallelism it would use and the number of sections it opens.

Variants

Derived

Derive the floor of every region from its serial time and the dispatch cost.

Fixed(usize)

A fixed floor in the work unit of the family (documented where the family declares its gate: elements of the updated trailing block for the reductions, f64 elements for LU), a region runs in parallel from that many units. Fixed(0) and Fixed(1) make every region parallel that has any work.

Never

Never run a region in parallel.

Trait Implementations

impl Clone for ParThreshold

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ParThreshold

impl Debug for ParThreshold

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

Formats the value using the given formatter.

impl Default for ParThreshold

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ParThreshold

impl From<ParThreshold> for usize

See From<usize>; Fixed(0) is written as 1, the same behaviour, because 0 means derived.

fn from(value: ParThreshold) -> Self

Converts to this type from the input type.

impl From<usize> for ParThreshold

The integer form used by the C API: 0 is Derived, usize::MAX is Never, any other value is Fixed.

fn from(value: usize) -> Self

Converts to this type from the input type.

impl PartialEq for ParThreshold

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ParThreshold