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LLM: fix sdp of chatglm3 (#9917)

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* fix

* fix

* fix
This commit is contained in:
Ruonan Wang 2024-01-17 13:37:28 +08:00 committed by GitHub
parent 68d78fb57e
commit 427f75000b
1 changed files with 9 additions and 13 deletions
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22
python/llm/src/bigdl/llm/transformers/models/chatglm2.py
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@ -369,8 +369,7 @@ def core_attn_forward_8eb45c(self, query_layer, key_layer, value_layer, attentio
if pytorch_major_version >= 2 and (query_layer.device.type == 'xpu' or query_layer.size(0) > 1):
query_layer = query_layer.permute(1, 2, 0, 3)
L, S = query_layer.shape[2], key_layer.shape[2]
if attention_mask is None and (use_flash_attention(query_layer, key_layer) or
L == S and query_layer.device.type == "cpu"):
if attention_mask is None and L == S:
context_layer = torch.nn.functional.scaled_dot_product_attention(query_layer,
key_layer,
value_layer,
@ -380,19 +379,16 @@ def core_attn_forward_8eb45c(self, query_layer, key_layer, value_layer, attentio
attn = torch.matmul(query_layer,
key_layer.transpose(2, 3)) / math.sqrt(head_dim)
if attention_mask is not None:
attention_mask = ~attention_mask
attention_mask.masked_fill_(attention_mask.logical_not(), float("-inf"))
attn += attention_mask
elif L == S:
# first token, need attention mask
attn_bias = torch.zeros(L, S, dtype=query_layer.dtype,
attn_bias = torch.zeros(attention_mask.shape, dtype=query_layer.dtype,
device=query_layer.device)
temp_mask = torch.ones(L, S, dtype=torch.bool,
device=query_layer.device).tril(diagonal=0)
attn_bias.masked_fill_(temp_mask.logical_not(), float("-inf"))
attn_bias.to(query_layer.dtype)
attention_mask = ~attention_mask
if attention_mask.dtype == torch.bool:
attn_bias.masked_fill_(attention_mask.logical_not(), float("-inf"))
else:
attn_bias += attention_mask
attn += attn_bias
attn = torch.softmax(attn, -1)
attn = F.softmax(attn, dim=-1,
dtype=torch.float32).to(value_layer.dtype)
context_layer = torch.matmul(attn, value_layer)
context_layer = context_layer.permute(2, 0, 1, 3)
new_context_layer_shape = context_layer.size()[:-2] + (self.hidden_size_per_partition,)