Enum Class AttentionBackend

java.lang.Object

java.lang.Enum<AttentionBackend>

smile.llm.attention.AttentionBackend

All Implemented Interfaces:

Serializable, Comparable<AttentionBackend>, Constable

public enum AttentionBackend
extends Enum<AttentionBackend>

Pluggable attention kernel backends (SGLang-style names).

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
FLASHINFER	FlashInfer paged BatchPrefill / BatchDecode.
TORCH_NATIVE	LibTorch scaled_dot_product_attention (contiguous Q/K/V).

Method Summary

Modifier and Type	Method	Description
String	id()	Config / CLI identifier (e.g.
static AttentionBackend	parse(String value)	Parses a config string (case-insensitive).
String	toString()
static AttentionBackend	valueOf(String name)	Returns the enum constant of this class with the specified name.
static AttentionBackend[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

TORCH_NATIVE

public static final AttentionBackend TORCH_NATIVE

LibTorch scaled_dot_product_attention (contiguous Q/K/V).

FLASHINFER

public static final AttentionBackend FLASHINFER

FlashInfer paged BatchPrefill / BatchDecode.

Method Details

values

public static AttentionBackend[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static AttentionBackend valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

id

public String id()

Config / CLI identifier (e.g. torch_native).

Returns:

lowercase backend id.

parse

public static AttentionBackend parse(String value)

Parses a config string (case-insensitive).

Parameters:

value - torch_native or flashinfer.

Returns:

matching backend.

Throws:

IllegalArgumentException - if value is unknown.

toString

public String toString()

Overrides:

toString in class Enum<AttentionBackend>