Enum sql_ops::partition::cpu_radix_partition::CpuRadixPartitionAlgorithm

pub enum CpuRadixPartitionAlgorithm {
    NC,
    Swwc,
    SwwcSimd,
}

Specifies the radix partition algorithm.

Variants

NC

Non-caching radix partition.

This is a standard, parallel radix partition algorithm.

Swwc

Radix partition with software write-combining.

This algorithm uses software-write combine buffers to avoid TLB misses. The buffers are flushed using non-temporal SIMD stores on x86-64. In contrast, PPC64le uses regular SIMD stores, as non-temporal hints don’t actually enforce streaming, but cause additional overhead.

SwwcSimd

Radix partition with software write-combining and SIMD optimizations.

This is the same algorithm as Swwc, but uses SIMD loads in addition to the SIMD buffer flush. Also, loops are manually unrolled to 64 bytes.

Limitations

Currently only implemented for PPC64le.

Trait Implementations

impl Clone for CpuRadixPartitionAlgorithm

fn clone(&self) -> CpuRadixPartitionAlgorithm

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CpuRadixPartitionAlgorithm

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

Formats the value using the given formatter.

impl Copy for CpuRadixPartitionAlgorithm