Struct GpuSearchBackend 

pub struct GpuSearchBackend { /* private fields */ }

GPU search backend that manages vector data on the GPU.

When the gpu feature is enabled, this backend wraps a real rustyhdf5_gpu::GpuAccelerator for hardware-accelerated search. Falls back to CPU SIMD search when GPU is unavailable.

Implementations

impl GpuSearchBackend

pub fn try_init( vectors: &[Vec<f32>], norms: &[f32], dim: usize, threshold: usize, ) -> Self

Attempt to initialize GPU backend.

Returns a backend with GPU active only if hardware is detected, the gpu feature is enabled, and the collection size exceeds the threshold.

pub fn is_available(&self) -> bool

Check if GPU acceleration is active.

pub fn dim(&self) -> usize

Get the dimension this backend was initialized with.

pub fn threshold(&self) -> usize

Get the threshold for GPU activation.

pub fn re_upload(&mut self, vectors: &[Vec<f32>], norms: &[f32])

Re-upload vectors after mutation (save/compact).

pub fn search_cosine( &self, query: &[f32], vectors: &[Vec<f32>], norms: &[f32], tombstones: &[u8], k: usize, ) -> Vec<(usize, f32)>

Search using GPU-accelerated cosine similarity.

If GPU is not available, falls back to CPU SIMD prenorm search.

pub fn search_l2( &self, query: &[f32], vectors: &[Vec<f32>], tombstones: &[u8], k: usize, ) -> Vec<(usize, f32)>

Search using GPU-accelerated L2 distance.

pub fn device_info(&self) -> String

Get the device info string (for metrics/logging).