Hi, I am new to AI and decided to use Pytorch. I want to this model to generate some images, however as this was written before Pytorch 1.5, since the gradient calculation has been fixed then, this is the error message.
RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.cuda.FloatTensor [1, 512, 4, 4]] is at version 2; expected version 1 instead. Hint: enable anomaly detection to find the operation that failed to compute its gradient, with torch.autograd.set_detect_anomaly(True).<<<
I have looked at past examples and am not sure what is the problem, I believe it is happening within this region but I don’t know where! Any help would be greatly appreciated!
def process(self, images, edges, masks):
self.iteration += 1
# zero optimizers
self.gen_optimizer.zero_grad()
self.dis_optimizer.zero_grad()
# process outputs
outputs = self(images, edges, masks)
gen_loss = 0
dis_loss = 0
# discriminator loss
dis_input_real = torch.cat((images, edges), dim=1)
dis_input_fake = torch.cat((images, outputs.detach()), dim=1)
dis_real, dis_real_feat = self.discriminator(dis_input_real) # in: (grayscale(1) + edge(1))
dis_fake, dis_fake_feat = self.discriminator(dis_input_fake) # in: (grayscale(1) + edge(1))
dis_real_loss = self.adversarial_loss(dis_real, True, True)
dis_fake_loss = self.adversarial_loss(dis_fake, False, True)
dis_loss += (dis_real_loss + dis_fake_loss) / 2
# generator adversarial loss
gen_input_fake = torch.cat((images, outputs), dim=1)
gen_fake, gen_fake_feat = self.discriminator(gen_input_fake) # in: (grayscale(1) + edge(1))
gen_gan_loss = self.adversarial_loss(gen_fake, True, False)
gen_loss += gen_gan_loss
# generator feature matching loss
gen_fm_loss = 0
for i in range(len(dis_real_feat)):
gen_fm_loss += self.l1_loss(gen_fake_feat[i], dis_real_feat[i].detach())
gen_fm_loss = gen_fm_loss * self.config.FM_LOSS_WEIGHT
gen_loss += gen_fm_loss
# create logs
logs = [
("l_d1", dis_loss.item()),
("l_g1", gen_gan_loss.item()),
("l_fm", gen_fm_loss.item()),
]
return outputs, gen_loss, dis_loss, logs
def forward(self, images, edges, masks):
edges_masked = (edges * (1 - masks))
images_masked = (images * (1 - masks)) + masks
inputs = torch.cat((images_masked, edges_masked, masks), dim=1)
outputs = self.generator(inputs) # in: [grayscale(1) + edge(1) + mask(1)]
return outputs
def backward(self, gen_loss=None, dis_loss=None):
if dis_loss is not None:
dis_loss.backward()
self.dis_optimizer.step()
if gen_loss is not None:
gen_loss.backward()
self.gen_optimizer.step()<<<