Bugfix: support qk_head_dim != v_head_dim in FMHA #40
+58
−45
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The original implementation does not support qk_head_dim != v_head_dim, which is needed in Multi-head Latent Attention. Also fix some test code logic. Signed-off-by: Hua Huang <[email protected]>
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The original implementation does not support qk_head_dim != v_head_dim, which is needed in Multi-head Latent Attention. Also fix some test code logic.
Description
The original implementation does not support
qk_head_dim!=v_head_dim, which is needed in Multi-head Latent Attention. Problem sizes insamples/AttentionFMHA.pyare updated s.t.qk_head_dim!=v_head_dimandq_num_head!=kv_num_headto test a generic GQA case. Parameters and the way calling PyTorchscale_dot_product_attentionare also updated to avoid being unable to find a working backend.All tests have passed locally on a B200.
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