thanks for Answer
plot1 loss_tracker
x : Accumulation batchs number
y: running loss
plot2 Accuracy
x : Accumulation epoch number
y:  accuracy
four-class classification,
Output : tensor([[-1867.3853, -5551.1318, -4450.6240, 11866.9102],
[-2225.3528, -5707.1665, -2959.6877, 10890.8711],
[-2529.1191, -5777.2607, -4512.0718, 12815.6875],
[-2559.4792, -6071.3545, -3919.7209, 12546.3398]], device=‘cuda:0’)
Target : tensor([3, 3, 3, 3], device=‘cuda:0’)
Loss: 0.0
I often get a loss of zero in the course of learning.