Development build. This page describes main, not a released package. The latest published Lodestar.Gpu is 0.2.0 — read its documentation.

Home › Gpu › GPU kernels

Which permutation family a signature is built from.

public enum MinHashScheme

Example — one resident batch, both families.

using Lodestar.Gpu.Compute;

using var context = GpuContext.Create(preferCpu: true);
using var resident = DeviceTokenHashes.Upload(context, [[11u, 22u, 33u]]);
var kernel = new TiledMinHashSignatures(context);

IReadOnlyList<uint[]> legacy =
    kernel.Signatures(resident, [3UL], [13UL], MinHashScheme.Legacy);
IReadOnlyList<uint[]> affine =
    kernel.Signatures(resident, [3UL], [13UL], MinHashScheme.Affine32);

bool agree = legacy[0][0] == affine[0][0];  // => False

Members — two, and they share no value.

Remarks — the same two families Lodestar.Text.Similarity.MinHashScheme names, and a separate enum. Both live in Lodestar.Abstractions since #1142, each under the namespace it first shipped in and forwarded from its package, so code built against either keeps binding; merging them would break one set of callers. This package takes no edge to Lodestar.Text, which is why MersennePrime and the 32-bit mask are spelled twice.

The cost is visible to a caller using both: using Lodestar.Gpu.Compute; and using Lodestar.Text.Similarity; together make the bare name ambiguous, and one of them needs a using alias.

Affine32 applies the MurmurHash3 finalizer inside the kernel, as the shared tile fills, so one DeviceTokenHashes serves both families rather than belonging to one.

Applies to — net10.0, netstandard2.1.

See also — TiledMinHashSignatures.Signatures, the namespace index.