I can't find the source code of _scaled_dot_product_attention

Hi,

I want to get the gradient of attention map.
So, I tried to inject the hook function in torch.nn.functional._scaled_dot_product_attention module.

However, I cannot find any source code of _scaled_dot_product_attention in pytorch github.

Where can I find it?

Thank you, and Happy new year

You can find the source code here.

I tried to find the source code based on python.

But, I missed the cpp based code.

Thank you!!!