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Support another batch dimension for softmax. In training or batch inference, we may add a batch dimension as the first dimension of some tensors. However, we use the third dimension(
tensor.shape[2]
) as thehead_dim
, which would be influenced. In this pr, I modify it totensor.shape[-3]
to solve this problem. CUDA kernel is modified as well.Enable test_atten_core, this test is skipped by default and never be used.