Mojo trait
MHAOperand
This serves as the trait to support arguments to our MHA kernel.
Implemented traits
AnyType,
Copyable,
DevicePassable,
ImplicitlyCopyable,
ImplicitlyDestructible,
Movable,
RegisterPassable,
TrivialRegisterPassable
comptime members
__copyinit__is_trivial
comptime __copyinit__is_trivial
A flag (often compiler generated) to indicate whether the implementation of __copyinit__ is trivial.
The implementation of __copyinit__ is considered to be trivial if:
- The struct has a compiler-generated trivial
__copyinit__and all its fields have a trivial__copyinit__method.
In practice, it means the value can be copied by copying the bits from one location to another without side effects.
__del__is_trivial
comptime __del__is_trivial
A flag (often compiler generated) to indicate whether the implementation of __del__ is trivial.
The implementation of __del__ is considered to be trivial if:
- The struct has a compiler-generated trivial destructor and all its fields
have a trivial
__del__method.
In practice, it means that the __del__ can be considered as no-op.
__moveinit__is_trivial
comptime __moveinit__is_trivial
A flag (often compiler generated) to indicate whether the implementation of __moveinit__ is trivial.
The implementation of __moveinit__ is considered to be trivial if:
- The struct has a compiler-generated
__moveinit__and all its fields have a trivial__moveinit__method.
In practice, it means the value can be moved by moving the bits from one location to another without side effects.
device_type
comptime device_type
Indicate the type being used on accelerator devices.
dtype
comptime dtype
page_size
comptime page_size
Required methods
__copyinit__
__copyinit__(out self: _Self, existing: _Self, /)
Create a new instance of the value by copying an existing one.
Args:
- existing (
_Self): The value to copy.
Returns:
_Self
__moveinit__
__moveinit__(out self: _Self, deinit existing: _Self, /)
Create a new instance of the value by moving the value of another.
Args:
- existing (
_Self): The value to move.
Returns:
_Self
block_paged_ptr
block_paged_ptr[tile_size: Int](self: _Self, batch_idx: UInt32, start_tok_idx: UInt32, head_idx: UInt32, head_dim_idx: UInt32 = 0) -> UnsafePointer[Scalar[_Self.dtype], ImmutAnyOrigin]
Returns:
cache_length
cache_length(self: _Self, batch_idx: Int) -> Int
Returns the length of the cache for a given batch index.
Returns:
max_context_length
max_context_length(self: _Self) -> UInt32
Returns the maximum cache length in a given batch index.
Returns:
row_idx
row_idx(self: _Self, batch_idx: UInt32, start_tok_idx: UInt32) -> UInt32
Returns the row idx when viewing the memory as a matrix.
Returns:
create_tma_tile
create_tma_tile[swizzle_mode: TensorMapSwizzle, *, BN: Int, depth: Int, BK: Int = padded_depth[_Self.dtype, swizzle_mode, depth]()](self: _Self, ctx: DeviceContext) -> TMATensorTile[_Self.dtype, _split_last_layout[_Self.dtype](IndexList(BN, 1, BK, Tuple()), swizzle_mode, True), _ragged_desc_layout[_Self.dtype](IndexList(BN, 1, BK, Tuple()), swizzle_mode)]
Creates a TMA tile for efficient GPU memory transfers. This is useful for k-major MMA operations where we don't need to mask any extra rows.
Returns:
create_ragged_tma_tile
create_ragged_tma_tile[swizzle_mode: TensorMapSwizzle, *, BN: Int, depth: Int, BK: Int = padded_depth[_Self.dtype, swizzle_mode, depth]()](self: _Self, ctx: DeviceContext) -> RaggedTMA3DTile[_Self.dtype, swizzle_mode, BN, BK]
Creates a TMA tile for efficient GPU memory transfers. This is useful for mn-major MMA operations where we need to mask extra rows to avoid adding NaN to the output through the MMA reduction.
Returns:
get_type_name
static get_type_name() -> String
Gets the name of the host type (the one implementing this trait). For example, Int would return "Int", DeviceBuffer[DType.float32] would return "DeviceBuffer[DType.float32]". This is used for error messages when passing types to the device. TODO: This method will be retired soon when better kernel call error messages arrive.
Returns:
String: The host type's name.
Provided methods
copy
copy(self: _Self) -> _Self
Explicitly construct a copy of self.
Returns:
_Self: A copy of this value.
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