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atulkum avatar atulkum commented on September 7, 2024

The reason is we want to keep "beam size == batch size". at the start every row in a beam has a <s> token.
And then we pick the output from the beam having highest score.

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tim5go avatar tim5go commented on September 7, 2024

dec_fea_expanded = dec_fea.unsqueeze(1).expand(b, t_k, n).contiguous() # B x t_k x 2*hidden_dim

I also observed if beam_size = 4 and batch_size = 32, it will throw dimension mismatch error here, is it the reason you mentioned?

It is quite weird I have to set them identical.

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atulkum avatar atulkum commented on September 7, 2024

To make the code simpler we run 1 beam per batch. You can code multiple beam per batch too, just need to process every beam separately.

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