Hello,
For the following code, the loss decreases.
loss_function=nn.MSELoss()
loss=loss_function(pred,label)

But, the loss remains completely unchanged if I change the pred by floor function. I checked the parameters after opt.step(), they are not changing.
loss_function=nn.MSELoss()
loss=loss_function(torch.floor(pred),label)

Why this might happen? Does it break computation graph?