In my network, there is a gpu utilization problem, it is not efficient enough.
So I have some question about the transformation between cpu and gpu, I think there exists a big gap.
in my current code:
model.to(device) # default gpu
data.to(device)
target.to(device)

And what about loss, optimizer and lr_scheduler, do they need to transform to gpu?
Will this operation have a big impact on efficiency?
PS: loss, optimizer,  lr_scheduler and all parameters about them (such as loss_weight)
Thanks in advance