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Python class
MultiheadAttention
MultiheadAttention
class max.nn.attention.MultiheadAttention(num_attention_heads, hidden_size, devices=None, dtype=float32, scale=None, qkv_has_bias=False, o_proj_has_bias=False, stacked_qkv=False)
Bases: Module
Multihead attention that handles both single and distributed computation.
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Parameters:
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- num_attention_heads (int) – The number of attention heads.
- hidden_size (int) – The dimension of the hidden states (embed_dim).
- devices (Sequence[DeviceRef] | None) – Device(s) to place the weights and run the computation. If multiple devices provided, uses distributed computation.
- dtype (DType) – DType of the QKV and output projection weights.
- scale (float | None) – Value used to scale the results of the attention output.
- qkv_has_bias (bool) – Whether to use an attention bias.
- o_proj_has_bias (bool) – Whether to use a bias on the output projection.
- stacked_qkv (bool) – Whether to use a single stacked QKV weight matrix.
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