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Normalize gates on expert dim before calculating seq_aux_loss #11160

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Normalize gates on expert dim before calculating seq_aux_loss #11160

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2 changes: 2 additions & 0 deletions paddlenlp/transformers/moe_gate.py
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Expand Up @@ -140,6 +140,8 @@ def _cal_seq_aux_loss(self, gates, top_k, topk_idx) -> paddle.Tensor:
paddle.Tensor: The value of sequence auxiliary loss.
"""
batch_size, seq_len, _ = gates.shape
gates = gates / (gates.sum(axis=-1, keepdim=True) + 1e-20)
_, topk_idx = paddle.topk(gates, top_k, axis=-1)
ce = paddle.zeros([batch_size, self.num_experts])
topk_idx = topk_idx.reshape([batch_size, -1])
ce.put_along_axis_(indices=topk_idx, values=paddle.ones([batch_size, seq_len * top_k]), axis=1, reduce="add")
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