fix rotary embedding rotary_dim
not equal head_size
case
#245
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FILL IN THE PR DESCRIPTION HERE
for model(like chatglm2/3-6b) whose
rotary_dim
not equal tohead_size
, current code will crash due to dim not equal.#212 have a not robust enough fix. chatglm series could work, but chatglm2-6b result is not correct.
this fix follow vllm rotary_embeding pytorch native impl. verified on chatglm2-6b and chatglm3-6b
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