def train_max_epochs(self, args, train0, train1, dev0, dev1, vocab, no_of_epochs, writer, time, save_epochs_flag=False,
save_batch_flag=False, save_batch=5):
print("No of epochs: ", no_of_epochs)
self.train()
self.enc_optim = optim.AdamW(self.encoder.parameters(), lr=args.learning_rate, betas=(self.beta1, self.beta2))
self.gen_optim = optim.AdamW(self.generator.parameters(), lr=args.learning_rate, betas=(self.beta1, self.beta2))
self.discrim1_optim = optim.AdamW(self.discriminator1.parameters(), lr=args.learning_rate, betas=(self.beta1, self.beta2))
self.discrim2_optim = optim.AdamW(self.discriminator2.parameters(), lr=args.learning_rate, betas=(self.beta1, self.beta2))
Path(args.saves_path).mkdir(parents=True, exist_ok=True)
saves_path = os.path.join(args.saves_path, utils.get_filename(args, time, "model"))
Path(saves_path).mkdir(parents=True, exist_ok=True)
flag = True
with autograd.detect_anomaly():
for epoch in range(no_of_epochs):
random.shuffle(train0)
random.shuffle(train1)
batches0, batches1, _1, _2 = utils.get_batches(train0, train1, vocab.word2id,
args.batch_size, noisy=True)
dev_batches0 = []
dev_batches1 = []
if self.args.dev:
dev_batches0, dev_batches1, _, _ = utils.get_batches(dev0, dev1, vocab.word2id, args.batch_size, noisy=True)
# batches0, batches1, _1, _2 = utils.get_batches_bpe(train0, train1, vocab.word2id,
# args.batch_size, noisy=True)
random.shuffle(batches0)
random.shuffle(batches1)
print("Epoch: ", epoch)
self.logger.info("Epoch: "+str(epoch))
train_flag = self(args, batches0, batches1, dev_batches0, dev_batches1, vocab, no_of_epochs, epoch, writer, time, save_epochs_flag=False,
save_batch_flag=False, save_batch=5)
if train_flag:
break
def loss_function(self, forward_ret, labels=None):
x_gen, x_real = forward_ret
if self.debug:
debug_context = autograd.detect_anomaly()
else:
debug_context = contextlib.nullcontext()
with debug_context:
d_p = self.disc(x_real)
d_q = self.disc(x_gen)
if self.train_disc():
if self.flags.gan_loss == 'bce':
loss = F.binary_cross_entropy_with_logits(d_p, torch.ones_like(d_p)) + \
F.binary_cross_entropy_with_logits(d_q, torch.zeros_like(d_q))
elif self.flags.gan_loss == 'wgan':
grad_penalty = self.gradient_penalty(x_real,
x_gen,
context=debug_context)
loss = -d_p.mean() + d_q.mean() + (
10.0 * grad_penalty) + 1e-3 * (d_p**2).mean()
self.d_loss = loss.item()
else:
if self.flags.gan_loss == 'bce':
loss = F.binary_cross_entropy_with_logits(d_p, torch.zeros_like(d_p)) + \
F.binary_cross_entropy_with_logits(d_q, torch.ones_like(d_q))
elif self.flags.gan_loss == 'wgan':
loss = d_p.mean() - d_q.mean()
self.g_loss = loss.item()
return loss, self.g_loss, self.d_loss
def train(self):
train_loss = np.array([])
valid_loss = np.array([])
print("start train")
for epoch in range(self.epoch_num):
with detect_anomaly():
print('epoch{0}'.format(epoch))
start = time.time()
self.model.train()
tmp_train_loss = self._run(self.model, self.criterion, self.train_data_loader, self.train_batch_size, mode='train')
train_loss = np.append(train_loss, tmp_train_loss.clone().numpy())
validation
self.model.eval()
with torch.no_grad():
tmp_valid_loss = self._run(self.model, self.criterion, self.valid_data_loader, self.valid_batch_size, mode='validation')
valid_loss = np.append(valid_loss, tmp_valid_loss.clone().numpy())
if (epoch + 1) % 10 == 0:
torch.save(self.model.state_dict(), self.save_path + 'wave_u_net{0}.ckpt'.format(epoch + 1))
end = time.time()
print('----excute time: {0}'.format(end - start))
plt.plot(train_loss)
print(train_loss)
plt.show()
def loss_function(self, input, output, mean, logvar):
"""
Given input, output, mean and std, compute and return loss
"""
# to prevent log of 0
epsilon = 1e-6
with autograd.detect_anomaly():
L_recon = -1 * torch.sum(input * torch.log(output + epsilon) +
(1 - input) * torch.log(1 - output),
dim=1)
# L_reg = -0.5 * torch.sum(1 + std - mean.pow(2) - std.exp())
# L_recon = torch.nn.functional.binary_cross_entropy(output, input)
L_reg = -0.5 * torch.sum(1 + logvar - mean.pow(2) - logvar.exp())
# L_reg = torch.sum(torch.sum(-1*torch.log(std) + ((std.pow(2) + mean.pow(2))-1)*0.5, dim=1, dim=0)
# Normalise by same number of elements as in reconstruction if we average recon
L_reg /= input.size(dim=0)
# * self.image_dim #####CHECK IF THIS IS NEEDED AGAIN!!!!!!
# get total loss
total_loss = torch.mean(
L_recon + L_reg, dim=0
) # may need to be the sum###############################################
return total_loss
def train(epoch, batch_logger, train_loader):
model.train()
if epoch == 120:
for param_group in optimizer.param_groups:
param_group['lr'] = 0.0001
if epoch == 150:
for param_group in optimizer.param_groups:
param_group['lr'] = 0.00001
for i, data in enumerate(train_loader):
with autograd.detect_anomaly():
data = data.to(device)
#print(data.y)
optimizer.zero_grad()
end_point = model(data)
loss = F.nll_loss(end_point, data.y)
pred = end_point.max(1)[1]
acc = (pred.eq(data.y).sum().item())/len(data.y)
loss.backward()
optimizer.step()
if i % 10 == 0:
batch_logger.log({'epoch': epoch,'batch': i + 1,'loss': loss.item(),'acc': acc})
def train(self, xs, ys):
with autograd.detect_anomaly():
xs = [self._t_cuda(x) for x in xs]
ys = [self._t_cuda(y) for y in ys]
#把loss关于weight的导数变成0，即把梯度置零
self.optimizer.zero_grad()
#执行model(x)的时候，底层自动调用forward计算结果
loss, focal_loss, pull_loss, push_loss, off_loss = self.network(
xs, ys)
#计算loss
loss = loss.mean()
#added
focal_loss = focal_loss.mean()
pull_loss = pull_loss.mean()
push_loss = push_loss.mean()
off_loss = off_loss.mean()
#反向传播求梯度
loss.backward()
#更新参数，即w* = w+alpha*grad
self.optimizer.step()
return loss, focal_loss, pull_loss, push_loss, off_loss
def train(model, loader, optimizer, n_iter):
model.train()
err = 0.0
i = 0
pbar = tqdm(total=len(loader), desc='records loaded')
for i, (seq, prof, _, dmat, pdb, *_) in enumerate(batch_generator(loader, prepare_xu_batch)):
optimizer.zero_grad()
cmap_hat = predict(model, seq, prof)
if n_iter % UPLOAD_IMAGE_EVERY == 0:
dmat_hat = cmap_to_dmat(cmap_hat)
upload_images(dmat, dmat_hat, pdb, n_iter, '%s/%s' % (model.name, 'train'))
loss = get_loss(cmap_hat, dmat)
err += loss.item()
e = err / (i + 1.)
writer.add_scalars('%s/Loss' % model.name, {"train": loss.item()}, n_iter)
try:
with autograd.detect_anomaly():
loss.backward()
except RuntimeError as e:
raise e
optimizer.step_and_update_lr(loss.item())
lr = optimizer.lr
pbar.set_description("Training Loss:%.6f, LR: %.6f (L=%d)" % (e, lr, seq.size(1)))
pbar.update(seq.size(0))
n_iter += 1
pbar.close()
return n_iter
def train_epoch(self, epoch):
"""
Evaluate the model on the train set.
"""
t1 = time()
output = {
'tp': [],
'fp': [],
'fn': [],
'tn': [],
'loss': [],
'preds': []
}
train_info = []
self.model = self.model.train()
train_iter = self.iterator(self.data['train'],
batch_size=self.params['batch'],
shuffle_=self.params['shuffle_data'])
self.optimizer.zero_grad()
for batch_idx, batch in enumerate(train_iter):
batch = self.convert_batch(batch)
with autograd.detect_anomaly():
loss, stats, predictions, select = self.model(batch)
loss.backward() # backward computation
output['loss'] += [loss.item()]
output['tp'] += [stats['tp'].to('cpu').data.numpy()]
output['fp'] += [stats['fp'].to('cpu').data.numpy()]
output['fn'] += [stats['fn'].to('cpu').data.numpy()]
output['tn'] += [stats['tn'].to('cpu').data.numpy()]
output['preds'] += [predictions.to('cpu').data.numpy()]
train_info += [
batch['info'][select[0].to('cpu').data.numpy(),
select[1].to('cpu').data.numpy(),
select[2].to('cpu').data.numpy()]
]
# Accumulate gradients (by Yuwei Xu)
if (batch_idx + 1) % self.accumulation_steps == 0:
nn.utils.clip_grad_norm_(self.model.parameters(),
self.gc) # gradient clipping
self.optimizer.step()
self.optimizer.zero_grad()
t2 = time()
if self.window:
total_loss, scores = self.subdocs_performance(
output['loss'], output['preds'], train_info)
else:
total_loss, scores = self.performance(output)
self.train_res['loss'] += [total_loss]
self.train_res['score'] += [scores[self.primary_metric]]
print('Epoch: {:02d} | TRAIN | LOSS = {:.05f}, '.format(
epoch, total_loss),
end="")
print_results(scores, [], self.show_class, t2 - t1)
def train(
self,
epochs: int,
val_frequency: int,
print_frequency: int = 20,
log_frequency: int = 5,
start_epoch: int = 0,
):
self.model.train()
with autograd.detect_anomaly():
for epoch in range(start_epoch, epochs):
self.model.train()
data_load_start_time = time.time()
# Iterate over the samples in the training set
for batch, labels, fnames in self.train_loader:
batch = batch.to(self.device)
labels = labels.to(self.device)
data_load_end_time = time.time()
batch = batch.float()
labels = labels.float()
# Forward pass of the CNN
logits = self.model.forward(batch)
labels = torch.unsqueeze(labels, dim=1)
# Calculate the loss
loss = self.criterion(logits, labels)
# Backpropagate error
loss.backward()
# Update the optimiser
self.optimizer.step()
self.optimizer.zero_grad()
# Log times and loss
data_load_time = data_load_end_time - data_load_start_time
step_time = time.time() - data_load_end_time
if ((self.step + 1) % log_frequency) == 0:
self.log_metrics(epoch, loss, data_load_time,
step_time)
if ((self.step + 1) % print_frequency) == 0:
self.print_metrics(epoch, loss, data_load_time,
step_time)
self.step += 1
data_load_start_time = time.time()
self.summary_writer.add_scalar("epoch", epoch, self.step)
if ((epoch + 1) % val_frequency) == 0:
self.validate(epoch)
# self.validate() will put the model in validation mode,
# so we have to switch back to train mode afterwards
self.model.train()
def UCE_loss(self, alpha, soft_output):
with autograd.detect_anomaly():
alpha_0 = alpha.sum(1).unsqueeze(-1).repeat(1, self.output_dim)
entropy_reg = Dirichlet(alpha).entropy()
UCE_loss = torch.sum(
soft_output *
(torch.digamma(alpha_0) -
torch.digamma(alpha))) - self.regr * torch.sum(entropy_reg)
return UCE_loss
def test_g1(self):
with autograd.detect_anomaly():
inp = torch.rand(5, 5, requires_grad=True)
x = inp[1:3, 1:3]
x = x**2
d = x.sum()
print(d.grad)
d.backward(retain_graph=True)
print(d.grad)
print(inp.grad)
def _fwd(self, X):
with torch.no_grad():
with autograd.detect_anomaly():
try:
X = X.to(self.devices[0])
y = self.tcn(X).detach().cpu().numpy()
except Exception as e:
os.system('clear')
Tools.pyout(e, force=True)
sys.exit(0)
return y
def train_epoch(self, epoch):
"""
Train model on the training set for 1 epoch, estimate performance and average loss.
"""
t1 = time.time()
output_tr = {
'tp': [],
'fp': [],
'fn': [],
'tn': [],
'loss': [],
'preds': [],
'truth': [],
'probs': []
}
self.model = self.model.train()
train_iter = self.iterator(self.data['train'],
batch_size=self.params['batch'],
shuffle_=True)
for batch in train_iter:
batch = self.convert_batch(batch)
with autograd.detect_anomaly():
self.optimizer.zero_grad()
loss, stats, probs, preds, truth, att_scores = self.model(
batch)
output_tr['preds'] += preds.to('cpu').data.tolist()
output_tr['probs'] += probs.to('cpu').data.tolist()
output_tr['truth'] += truth.to('cpu').data.tolist()
output_tr['loss'] += [loss.item()]
output_tr['tp'] += [stats['tp'].to('cpu').data.numpy()]
output_tr['fp'] += [stats['fp'].to('cpu').data.numpy()]
output_tr['fn'] += [stats['fn'].to('cpu').data.numpy()]
output_tr['tn'] += [stats['tn'].to('cpu').data.numpy()]
loss.backward() # backward computation
nn.utils.clip_grad_norm_(self.model.parameters(),
self.params['gc']) # gradient clipping
self.optimizer.step() # update
t2 = time.time()
# estimate performance
total_loss, scores = self.performance(output_tr)
self.train_res['loss'] += [total_loss]
self.train_res['score'] += [scores[self.primary_metric]]
print('Epoch: {:02d} | TRAIN | LOSS = {:.04f}'.format(
epoch, total_loss),
end="")
print_results(scores, self.show_class, t2 - t1)
def test_g2(self):
with autograd.detect_anomaly():
x = torch.zeros(5, 5, requires_grad=True)
inp = torch.tensor([1, 3, 1, 3], requires_grad=True)
x[inp[0]:inp[1], inp[2]:inp[3]] = 1
x = x**2
d = x.sum()
print(d.grad)
d.backward(retain_graph=True)
print(d.grad)
print(inp.grad)
def train(model, loader, optimizer, n_iter):
model.train()
err = 0.0
i = 0
pbar = tqdm(total=len(loader), desc='records loaded')
for i, (seq, beta, prof, dmat, dssp, pdb,
*_) in enumerate(batch_generator(loader, prepare_pdb_batch)):
optimizer.zero_grad()
cmap_hat, dssp_hat = predict(model, seq, beta, prof)
cmap = get_contact_map(dmat)
losses = get_loss(cmap_hat, cmap, dssp_hat, dssp)
loss = sum(losses)
err += loss.item()
e = err / (i + 1.)
writer.add_scalars('M3/Loss', {"train": loss.item()}, n_iter)
writer.add_scalars('M3/CMAP_BCE', {"train": losses[0].item()}, n_iter)
writer.add_scalars('M3/SYM_L1', {"train": losses[1].item()}, n_iter)
if len(losses) == 3:
writer.add_scalars('M3/SS_CE', {"train": losses[2].item()}, n_iter)
try:
with autograd.detect_anomaly():
loss.backward()
except RuntimeError as e:
raise e
if n_iter % UPLOAD_IMAGE_EVERY == 0:
for cm1, cm2, dm, pdb_id in zip(cmap_hat.data.cpu().numpy(),
cmap.float().data.cpu().numpy(),
dmat.data.cpu().numpy(), pdb):
writer.add_image('M3/%s/cmap_pred' % pdb_id,
to_colormap_image(cm1),
n_iter,
dataformats='HWC')
writer.add_image('M3/%s/cmap_true' % pdb_id,
to_colormap_image(cm2),
n_iter,
dataformats='HWC')
# writer.add_image('M3/%s/dmap_true' % pdb_id, to_colormap_image(dm), n_iter, dataformats='HWC')
optimizer.step_and_update_lr(loss.item())
lr = optimizer.lr
pbar.set_description("Training Loss:%.6f, LR: %.6f (L=%d)" %
(e, lr, seq.size(1)))
pbar.update(seq.size(0))
n_iter += 1
pbar.close()
return n_iter
def train(train_data):
# Turn on training mode which enables dropout.
model.train()
total_loss = 0.
total_aux_loss = 0.
start_time = time.time()
ntokens = len(corpus.dictionary)
for batch, i in enumerate(range(0, train_data.size(1) - 1, BPTT)):
with autograd.detect_anomaly():
data, targets = get_batch(train_data,
i) # data is [35, 20], targets is [700]
trg_mask = create_mask(data).to(device)
optimizer.zero_grad()
for submodule in model.modules():
submodule.register_forward_hook(nan_hook)
output, aux_loss = model(src=None,
trg=data,
src_mask=None,
trg_mask=trg_mask,
is_lm=True)
output = output.view(-1, ntokens)
loss = criterion(output, targets)
final_loss = loss + aux_loss
final_loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), CLIP)
optimizer.step_and_update_lr()
model_has_nan = check_for_nans(model)
if model_has_nan:
print("Nans have been identified")
total_loss += loss.item()
total_aux_loss += aux_loss.item()
if batch == 0:
print("Running without errors")
if batch % LOG_INTERVAL == 0 and batch > 0:
cur_loss = total_loss / LOG_INTERVAL # curr loss is independent of the aux loss
curr_aux_loss = total_aux_loss / LOG_INTERVAL
elapsed = time.time() - start_time
print(
'| epoch {:3d} | {:5d}/{:5d} batches | lr {:02.2f} | ms/batch {:5.2f} | '
'loss {:5.2f} | aux_loss {:5.2f} | ppl {:8.2f}'.format(
epoch, batch,
train_data.size(1) // BPTT, LR,
elapsed * 1000 / LOG_INTERVAL, cur_loss, curr_aux_loss,
math.exp(cur_loss)))
total_loss = 0.
total_aux_loss = 0.
start_time = time.time()
def run_experiment(dataset_folder, ratio_0, ratio_p1, use_cce,
batch_size, lr, epochs, early_stopping_patience,
emb_dim, lstm_hidden_dim, emb_dropout_p, lstm_dropout_p, n_classes,
checkpoint_file, device):
tb_writer = SummaryWriter(comment=f"_r0_{ratio_0}_rp1_{ratio_p1}_cce_{use_cce}")
vocab_size, train_it, val_it, test_it = read_data(dataset_folder, ratio_0, ratio_p1, batch_size, device)
model = BiLstmClassifier(vocab_size, emb_dim, lstm_hidden_dim, emb_dropout_p, lstm_dropout_p, n_classes).to(device)
opt = optim.Adam(model.parameters(), lr)
criterion = complement_cross_entropy_loss if use_cce else one_hot_cross_entropy_loss
with autograd.detect_anomaly():
model = train_model(model, n_classes, criterion, opt, train_it, val_it, epochs, early_stopping_patience, checkpoint_file, tb_writer)
score = evaluate_model(model, n_classes, test_it, tb_writer)
return score
def train(self, states, critic):
with autograd.detect_anomaly():
# transform to torch tensors
states = torch.from_numpy(states).float().to(self._device)
self._optimizer.zero_grad()
# compute actions taken in these states by the actor
_actionsPred = self._backbone([states])
# compose the critic over the actor outputs (sandwich), which effectively does g(f(x))
_lossActor = -critic(states, _actionsPred).mean()
_lossActor.backward()
# take a step with the optimizer
self._optimizer.step()
def train(self, loss, clip_grad_norm=None):
assert self.is_training()
self.optimizer.zero_grad()
if self.debug:
debug_context = autograd.detect_anomaly()
else:
debug_context = contextlib.nullcontext()
with debug_context:
loss.backward()
if clip_grad_norm is not None:
nn.utils.clip_grad_norm_(self.model.parameters(), clip_grad_norm)
self.optimizer.step()
self.increment_train_steps()
def _forward_pass_with_anomaly_detection(
self,
patches: torch.Tensor,
mask: torch.Tensor = None,
labels: torch.Tensor = None) -> SegmentationForwardPass.Result:
if self.detect_anomaly:
with autograd.detect_anomaly():
result = self._forward_pass(patches, mask, labels)
if result.loss is not None and (math.isnan(result.loss)
or math.isinf(result.loss)):
raise RuntimeError(
f"The loss computation returned {result.loss}")
return result
return self._forward_pass(patches, mask, labels)
def predict_test(testset):
# Create dataset loader
# Create dataset loader
test_loader = torch.utils.data.DataLoader(testset,
batch_size=args.batch_size,
shuffle=False,
drop_last=False)
# restore checkpoint
restore_checkpoint(args)
# Set loss function
args.criterion = torch.nn.MSELoss()
# Predict all test elements and measure
run_loss = 0
for batch_idx, batch in enumerate(test_loader, 1):
# Unpack batch
inputs, targets = batch
# Send to device
inputs = inputs.to(args.device)
targets = targets.to(args.device)
# Calculate gradients and update
with autograd.detect_anomaly():
# forward
outputs = args.net(inputs)
# get maximum from each layer
print(outputs.shape)
idx_inpt = get_max(inputs, dim=(2, 3))
idx_otpt = get_max(outputs, dim=(2, 3))
print(idx_inpt.shape)
print(idx_inpt)
print(idx_otpt.shape)
print(idx_otpt)
input()
# calculate loss
loss = args.criterion(outputs, targets)
run_loss += loss.item()
if batch_idx < 10:
# Plot predictions
# img = imshow_bboxes(inputs, targets, args, t_outputs)
# args.writer.add_image('Test/predicted', img, batch_idx)
pass
else:
break
def test_LinearOperator_radon_gradcheck(self):
# Set image size.
image_size = (5, 4)
# Define angles.
nangles = 180
angles = np.linspace(0, np.pi, nangles, False)
# Create operators.
R, Radj, ndet = radon.radon2d(*image_size, angles)
data_size = (nangles, ndet)
# Create instances for use with torch.
K = radon.RadonTransform(R, Radj, data_size)
Kadj = radon.BackProjection(R, Radj, image_size)
# Apply to dummy input.
x = torch.randn((1, 1, *image_size),
requires_grad=True,
dtype=torch.double)
f = K(x)
# Check for simple loss.
loss = f.sum()
loss.backward()
torch.allclose(x.grad, Kadj(x.new_ones(1, 1, *data_size)))
def op_fun(x):
out = LinearOperator.apply(x, K, Kadj)
return out.sum()
# Check for anomalies.
with tag.detect_anomaly():
x = torch.randn(1,
1,
*image_size,
requires_grad=True,
dtype=torch.double)
out = op_fun(x)
out.backward()
# Check numerical gradient up to certain tolerance.
# Due to inaccuracy of adjoint this check fails.
x = torch.randn(1,
1,
*image_size,
requires_grad=True,
dtype=torch.double)
tag.gradcheck(lambda t: K(t), x)
def train(args, model, device, train_loader, optimizer, epoch, is_display):
model.train()
total_loss = 0
for batch_idx, (imgs, labels, gt) in enumerate(train_loader):
with autograd.detect_anomaly():
if args.using_contrastive_loss:
target = gt.type(torch.FloatTensor).view(gt.shape[0], 1)
target = target.view(-1)
imgs[0], imgs[1], imgs[2], imgs[3], target = imgs[0].to(
device), imgs[1].to(device), imgs[2].to(
device), imgs[3].to(device), target.to(device)
optimizer.zero_grad()
_, A, B, C, D = model(imgs[0], imgs[1], imgs[2], imgs[3])
embs = [A, B, C, D]
loss = criteria(embs, target)
total_loss += loss.item()
sum_loss = loss
if sub_criteria != None:
sub_loss = sub_criteria(embs, target)
total_loss += sub_loss.item()
sum_loss += sub_loss
if sub_criteria_2 != None:
sub_loss = sub_criteria_2(embs, target)
total_loss += sub_loss.item()
sum_loss += sub_loss
else:
target = gt.type(torch.FloatTensor).view(gt.shape[0], 1)
imgs[0], imgs[1], imgs[2], imgs[3], target = imgs[0].to(
device), imgs[1].to(device), imgs[2].to(
device), imgs[3].to(device), target.to(device)
optimizer.zero_grad()
output, emb_a, emb_b, emb_c, emb_d = model(
imgs[0], imgs[1], imgs[2], imgs[3])
loss = criteria(output, target)
total_loss += loss.item()
sum_loss = loss
sum_loss.backward()
optimizer.step()
if batch_idx % args.log_interval == 0:
logging.info(
'[Epoch {}/{}] [Batch {}/{}] [loss: {:.6f}]'.format(
epoch, args.epoch, batch_idx, len(train_loader),
sum_loss.item()))
total_loss /= len(train_loader)
logging.info('[Epoch {}/{}] [loss: {:.6f}]'.format(epoch, args.epoch,
total_loss))
return total_loss
def train(self):
LOGGER.addHandler(
logging.FileHandler(
os.path.join(self.args.checkpoint_dir, 'logger_train.log')))
writer = SummaryWriter(log_dir=self.args.checkpoint_dir)
start_time = time()
# setup dataset/data loader
loader = {k: self.__setup_loader(k) for k in ['train', 'valid']}
LOGGER.info('data_loader: %s' % str(list(loader.keys())))
# start training
LOGGER.info('*** start training from step %i, epoch %i ***' %
(self.__step, self.__epoch))
try:
with detect_anomaly():
while True:
data_loader, _ = loader['train']
if_training_finish = self.__epoch_train(data_loader,
writer=writer)
self.release_cache()
data_loader, info_loader = loader['valid']
self.__epoch_valid(data_loader,
info_loader=info_loader,
writer=writer,
prefix='valid',
sample_n=SAMPLE_N)
self.release_cache()
if if_training_finish:
break
self.__epoch += 1
except RuntimeError:
LOGGER.exception(
'*** RuntimeError (NaN found, see above log in detail) ***')
except KeyboardInterrupt:
LOGGER.info('*** KeyboardInterrupt ***')
self.__save()
LOGGER.info('[training completed, %0.2f sec in total]' %
(time() - start_time))
writer.close()
LOGGER.info('ckpt saved at %s' % self.args.checkpoint_dir)
def test_LinearOperator_radon_cuda(self):
# Set image size.
image_size = 5, 4
# Define angles.
nangles = 180
angles = np.linspace(0, np.pi, nangles, False)
# Check if GPU is available.
cuda = torch.cuda.is_available()
device = torch.device('cuda' if cuda else 'cpu')
# Create operators.
R, Radj, ndet = radon.radon2d(*image_size, angles, cuda)
data_size = (nangles, ndet)
# Create instances for use with torch.
K = radon.RadonTransform(R, Radj, data_size)
Kadj = radon.BackProjection(R, Radj, image_size)
# Apply to dummy input.
x = torch.randn((1, 1, *image_size),
requires_grad=True,
dtype=torch.double,
device=device)
f = K(x)
# Check for simple loss.
loss = f.sum()
loss.backward()
torch.allclose(x.grad, Kadj(x.new_ones(1, 1, *data_size)))
def op_fun(x):
out = LinearOperator.apply(x, K, Kadj)
return out.sum()
# Check for anomalies.
with tag.detect_anomaly():
x = torch.randn(1,
1,
*image_size,
requires_grad=True,
dtype=torch.double,
device=device)
out = op_fun(x)
out.backward()
def train():
ds = GlazeCompositionDataset()
train_loader, val_loader = get_data_loaders(ds)
out_D = len(ds.compounds)
print('Out Dimension is %i', out_D)
model = Net(out_D)
loss = torch.nn.MSELoss()
optimizer = optim.SGD(model.parameters(), lr=0.2, momentum=0.5)
trainer = create_supervised_trainer(model, optimizer, loss)
metrics = {'MSE': ignite.metrics.RootMeanSquaredError()}
evaluator = create_supervised_evaluator(model, metrics)
saver = ignite.handlers.ModelCheckpoint('./checkpoints/models',
'chkpoint',
save_interval=2,
n_saved=4,
create_dir=True,
require_empty=False)
trainer.add_event_handler(Events.EPOCH_COMPLETED, saver,
{'glaze_net_3': model})
print(model.state_dict().keys())
@trainer.on(Events.ITERATION_COMPLETED)
def log_training_loss(trainer):
iter = (trainer.state.iteration - 1) % len(train_loader) + 1
if iter % 10 == 0:
print("Epoch[{}] Iteration[{}/{}] Loss: {:.10f}".format(
trainer.state.epoch, iter, len(train_loader),
trainer.state.output))
@trainer.on(Events.EPOCH_COMPLETED)
def log_training_results(trainer):
evaluator.run(train_loader)
metrics = evaluator.state.metrics
print("Training Results - Epoch: {} MSE: {:.2f}".format(
trainer.state.epoch, metrics['MSE']))
@trainer.on(Events.EPOCH_COMPLETED)
def log_validation_results(trainer):
evaluator.run(val_loader)
metrics = evaluator.state.metrics
print("Validation Results - Epoch: {} MSE: {:.2f}".format(
trainer.state.epoch, metrics['MSE']))
with autograd.detect_anomaly():
trainer.run(train_loader, max_epochs=100)
return model
def run(self):
try:
# display configuration
self.logger.debug('>>> configuration: \n' + conf().dump().strip())
# load pre-trained model
current_epoch = self.load_model()
# train
with autograd.detect_anomaly():
self.train(current_epoch)
# evaluate
self.evaluate()
except Exception as e:
self.logger.error(e, exc_info=True)
raise e
def run_batch(self, data, visualize=False):
"""If visualize is True, a visualize method of the model module is called."""
if not isinstance(data, list) and not isinstance(data, tuple):
data = [data]
if self.is_training():
context = contextlib.nullcontext()
else:
context = torch.no_grad()
if self.debug:
debug_context = autograd.detect_anomaly()
else:
debug_context = contextlib.nullcontext()
with context, debug_context:
if not visualize:
return self.model(*data)
else:
return self.model.visualize(*data)
def train(model, loader, optimizer, n_iter):
model.train()
err = 0.0
i = 0
pbar = tqdm(total=len(loader), desc='pairs loaded')
for i, (s1, s2, b1, b2, p1, p2, m1, m2, idx, pdb1, pdb2,
*_) in enumerate(batch_generator(loader, prepare_pairs_batch)):
optimizer.zero_grad()
assert s1.shape == s2.shape
assert m1.shape == m2.shape
assert p1.shape == p2.shape
ddm_hat, ddm = predict_2ways(model, m1, m2, s1, s2, b1, b2, p1, p2,
idx)
loss = get_loss(ddm_hat, ddm)
err += loss.item()
e = err / (i + 1.)
writer.add_scalars('M1/Loss', {"train": e}, n_iter)
try:
with autograd.detect_anomaly():
loss.backward()
except RuntimeError as e:
raise e
if n_iter % UPLOAD_IMAGE_EVERY == 0:
write_true_pred_pairs("M1", n_iter, pdb1, pdb2,
ddm.data.cpu().numpy(),
ddm_hat.data.cpu().numpy())
write_dist_mats_pairs("M1", n_iter, pdb1, pdb2,
m1.data.cpu().numpy(),
m2.data.cpu().numpy())
optimizer.step_and_update_lr(loss.item())
lr = optimizer.lr
pbar.set_description("Training Loss:%.6f, LR: %.6f (L=%d)" %
(e, lr, s1.size(1)))
pbar.update(len(idx))
n_iter += 1
pbar.close()
return n_iter
def loss_function(self, forward_ret, labels=None):
if self.is_training():
forward_batch, backward_batch = self.get_disc_batches(forward_ret)
if self.debug:
debug_context = autograd.detect_anomaly()
else:
debug_context = nullcontext()
with debug_context:
d_ps = self.disc(*forward_batch)
d_qs = self.disc(*backward_batch)
if self.train_disc():
if self.flags.loss == 'wasserstein':
if self.flags.gp:
grad_penalty = self.gradient_penalty(
backward_batch,
forward_batch,
context=debug_context)
else:
grad_penalty = 0
loss = -d_ps.mean() + d_qs.mean() + (10.0 * grad_penalty) + self.flags.wasserstein_nodrift * \
((d_ps + d_qs)**2).mean()
else:
loss = (F.binary_cross_entropy_with_logits(
d_ps, torch.ones_like(d_ps)) +
F.binary_cross_entropy_with_logits(
d_qs, torch.zeros_like(d_qs)))
self.d_loss = loss.item()
else:
if self.flags.loss == 'wasserstein':
loss = d_ps.mean() - d_qs.mean()
else:
loss = (F.binary_cross_entropy_with_logits(
d_ps, torch.zeros_like(d_ps)) +
F.binary_cross_entropy_with_logits(
d_qs, torch.ones_like(d_qs)))
self.g_loss = loss.item()
g_loss = self.g_loss
d_loss = self.d_loss
else:
loss, g_loss, d_loss = 0.0, 0.0, 0.0
return loss, g_loss, d_loss
