[ipex-llm] A significant deviation in accuracy between ipex llm 2.2.0b1 and 2.1.0b20240515 when running the codegeex model

[johnysh]

When we ran codegeex models in ipex -llm 2.2.0b1 env , it generated a significant deviation in accuracy than in ipex-llm 2.1.0b2024515 or 2.1.0b2. We make test_logits test to get some data as below:

下面是各个ipex-llm版本间的logits结果(optimize_model=True)比较:
2.1.0b2 <-> 2.1.0b20240515 : 一致
2.1.0b2 <-> 2.1.0 : 不一致
2.1.0b2 <-> 2.2.0b1 : 不一致
2.1.0 <-> 2.2.0b1 : 不一致

下列版本做了optimize_model=True和optimize_model=False间的logits结果比较:
2.1.0b20240515: 一致
2.1.0b2: 一致
2.1.0: 不一致
2.2.0b1: 不一致

pls help me to debug this issue , thx.