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[transformer] fix mqa in cross att #2498

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Apr 23, 2024
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[transformer] fix mqa in cross att #2498

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13 changes: 12 additions & 1 deletion wenet/transformer/attention.py
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Original file line number Diff line number Diff line change
Expand Up @@ -444,7 +444,18 @@ def forward(
else:
q, k, v = self.forward_qkv(query, key, value)
new_cache = (k, v) if not self.training else cache

# for multi query or multi groups attention
if self.h_kv != self.h and self.h_kv != 1:
k = torch.repeat_interleave(
k,
self.h // self.h_kv,
dim=-3,
)
v = torch.repeat_interleave(
v,
self.h // self.h_kv,
dim=-3,
)
B = query.size(0)
Beams = 1
if B != k.size(0):
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