def train_one_epoch(student, teacher, teacher_without_ddp, dino_loss, data_loader,
optimizer, lr_schedule, wd_schedule, momentum_schedule,epoch,
fp16_scaler, args):
metric_logger = utils.MetricLogger(delimiter=" ")
header = 'Epoch: [{}/{}]'.format(epoch, args.epochs)
for it, (images, _) in enumerate(metric_logger.log_every(data_loader, 10, header)):
# update weight decay and learning rate according to their schedule
it = len(data_loader) * epoch + it # global training iteration
for i, param_group in enumerate(optimizer.param_groups):
param_group["lr"] = lr_schedule[it]
if i == 0: # only the first group is regularized
param_group["weight_decay"] = wd_schedule[it]
# move images to gpu
images = [im.cuda(non_blocking=True) for im in images]
# teacher and student forward passes + compute dino loss
with torch.cuda.amp.autocast(fp16_scaler is not None):
teacher_output = teacher(images[:2]) # only the 2 global views pass through the teacher
student_output = student(images)
loss = dino_loss(student_output, teacher_output, epoch)
if not math.isfinite(loss.item()):
print("Loss is {}, stopping training".format(loss.item()), force=True)
sys.exit(1)
# student update
optimizer.zero_grad()
param_norms = None
if fp16_scaler is None:
loss.backward()
if args.clip_grad:
param_norms = utils.clip_gradients(student, args.clip_grad)
utils.cancel_gradients_last_layer(epoch, student,
args.freeze_last_layer)
optimizer.step()
else:
fp16_scaler.scale(loss).backward()
if args.clip_grad:
fp16_scaler.unscale_(optimizer) # unscale the gradients of optimizer's assigned params in-place
param_norms = utils.clip_gradients(student, args.clip_grad)
utils.cancel_gradients_last_layer(epoch, student,
args.freeze_last_layer)
fp16_scaler.step(optimizer)
fp16_scaler.update()
# EMA update for the teacher
with torch.no_grad():
m = momentum_schedule[it] # momentum parameter
for param_q, param_k in zip(student.module.parameters(), teacher_without_ddp.parameters()):
param_k.data.mul_(m).add_((1 - m) * param_q.detach().data)
# logging
torch.cuda.synchronize()
metric_logger.update(loss=loss.item())
metric_logger.update(lr=optimizer.param_groups[0]["lr"])
metric_logger.update(wd=optimizer.param_groups[0]["weight_decay"])
# gather the stats from all processes
metric_logger.synchronize_between_processes()
print("Averaged stats:", metric_logger)
return {k: meter.global_avg for k, meter in metric_logger.meters.items()}
def construct_graph(self, model_cls):
# model
self.model = model_cls()
# loss and accuracy
train_ops = _construct_loss_and_eval_ops_for_regression(self.model, self.train_data, is_training=True)
self.train_loss, self.train_tr_metric, self.train_val_metric = train_ops[0], train_ops[1], train_ops[2]
eval_ops = _construct_loss_and_eval_ops_for_regression(self.model, self.eval_data, is_training=False)
self.eval_loss, self.eval_tr_metric, self.eval_val_metric, self.eval_tr_input, self.eval_tr_output, \
self.eval_tr_func, self.eval_val_input, self.eval_val_output, self.eval_val_func, self.eval_val_preds, \
self.eval_val_sigma = eval_ops
# optimisation
training_variables = tf.trainable_variables()
training_gradients = tf.gradients(self.train_loss, training_variables)
training_gradients = utils.clip_gradients(training_gradients, 0, 0)
optimizer = tf.compat.v1.train.AdamOptimizer(learning_rate=FLAGS.outer_lr)
self.global_step = tf.compat.v1.train.get_or_create_global_step()
self.train_op = optimizer.apply_gradients(
list(zip(training_gradients, training_variables)), self.global_step)
def construct_graph(self, model_cls):
# construct model
self.model = model_cls()
# construct loss and accuracy ops
self.train_loss, self.train_tr_metric, self.train_val_metric = \
_construct_loss_and_eval_ops_for_classification(self.model, self.train_data, is_training=True)
self.train_eval_loss, self.train_eval_tr_metric, self.train_eval_val_metric = \
_construct_loss_and_eval_ops_for_classification(self.model, self.train_data, is_training=False)
self.eval_loss, self.eval_tr_metric, self.eval_val_metric = \
_construct_loss_and_eval_ops_for_classification(self.model, self.eval_data, is_training=False)
self.test_loss, self.test_tr_metric, self.test_val_metric = \
_construct_loss_and_eval_ops_for_classification(self.model, self.test_data, is_training=False)
# construct optimisation ops
training_variables = tf.compat.v1.trainable_variables()
training_gradients = tf.gradients(self.train_loss, training_variables)
training_gradients = utils.clip_gradients(training_gradients, 0, 0) # gradient clipping is not used
optimizer = tf.compat.v1.train.AdamOptimizer(learning_rate=FLAGS.outer_lr)
self.global_step = tf.compat.v1.train.get_or_create_global_step()
self.train_op = optimizer.apply_gradients(
list(zip(training_gradients, training_variables)), self.global_step)
def train_joint(
data_loader,
encoder,
decoder,
encoder_optimizer,
decoder_optimizer,
epoch,
grad_clip,
print_freq,
gradnorm_optimizer,
loss_weight_generation,
loss_weight_ranking,
gradnorm_loss,
gradnorm_alpha,
initial_generation_loss,
initial_ranking_loss,
):
"""
Perform one training epoch.
"""
loss_weights = [loss_weight_generation, loss_weight_ranking]
decoder.train()
if encoder:
encoder.train()
losses = AverageMeter()
# Loop over training batches
for i, (images, target_captions,
caption_lengths) in enumerate(data_loader):
target_captions = target_captions.to(device)
caption_lengths = caption_lengths.to(device)
images = images.to(device)
# Forward propagation
if encoder:
images = encoder(images)
decode_lengths = caption_lengths.squeeze(1) - 1
scores, decode_lengths, images_embedded, captions_embedded, alphas = decoder.forward_joint(
images, target_captions, decode_lengths)
loss_generation = decoder.loss(scores, target_captions, decode_lengths,
alphas)
loss_ranking = decoder.loss_ranking(images_embedded, captions_embedded)
loss = loss_weights[0] * loss_generation + loss_weights[
1] * loss_ranking
decoder_optimizer.zero_grad()
if encoder_optimizer:
encoder_optimizer.zero_grad()
loss.backward(retain_graph=True)
# Get the gradients of the shared layers and calculate their l2-norm
named_params = dict(decoder.named_parameters())
shared_params = [
param for param_name, param in named_params.items()
if param_name in decoder.SHARED_PARAMS and param.requires_grad
]
G1R = torch.autograd.grad(loss_generation,
shared_params,
retain_graph=True,
create_graph=True)
G1R_flattened = torch.cat([g.view(-1) for g in G1R])
G1 = torch.norm(loss_weights[0] * G1R_flattened.data, 2).unsqueeze(0)
G2R = torch.autograd.grad(loss_ranking, shared_params)
G2R_flattened = torch.cat([g.view(-1) for g in G2R])
G2 = torch.norm(loss_weights[1] * G2R_flattened.data, 2).unsqueeze(0)
# Calculate the average gradient norm across all tasks
G_avg = torch.div(torch.add(G1, G2), 2)
# Calculate relative losses
lhat1 = torch.div(loss_generation, initial_generation_loss)
lhat2 = torch.div(loss_ranking, initial_ranking_loss)
lhat_avg = torch.div(torch.add(lhat1, lhat2), 2)
# Calculate relative inverse training rates
inv_rate1 = torch.div(lhat1, lhat_avg)
inv_rate2 = torch.div(lhat2, lhat_avg)
# Calculate the gradient norm target for this batch
C1 = G_avg * (inv_rate1**gradnorm_alpha)
C2 = G_avg * (inv_rate2**gradnorm_alpha)
# Calculate the gradnorm loss
Lgrad = torch.add(gradnorm_loss(G1, C1.data),
gradnorm_loss(G2, C2.data))
# Backprop and perform an optimization step
gradnorm_optimizer.zero_grad()
Lgrad.backward()
gradnorm_optimizer.step()
# Clip gradients
if grad_clip:
clip_gradients(decoder_optimizer, grad_clip)
if encoder_optimizer:
clip_gradients(encoder_optimizer, grad_clip)
# Update weights
decoder_optimizer.step()
if encoder_optimizer:
encoder_optimizer.step()
# Keep track of metrics
losses.update(loss.item(), sum(decode_lengths).item())
# Log status
if i % print_freq == 0:
logging.info(
"Epoch: {0}[Batch {1}/{2}]\t"
"Loss: {loss.val:.4f} (Average: {loss.avg:.4f})\t Loss weights: Generation: {3:.4f} Ranking: {4:.4f}"
.format(
epoch,
i,
len(data_loader),
loss_weights[0].item(),
loss_weights[1].item(),
loss=losses,
))
# Renormalize the gradnorm weights
coef = 2 / torch.add(loss_weight_generation, loss_weight_ranking)
loss_weights = [
coef * loss_weight_generation, coef * loss_weight_ranking
]
logging.info("\n * LOSS - {loss.avg:.3f}\n".format(loss=losses))
def train(model, train_loader, val_loader, logger, optim, output, gpu = True, **train_config):
# 定义优化器，学习率
# torch.autograd.set_detect_anomaly(True)
accuracy = VQAAccuracy() # 计算精度
# class_frequence = torch.zeros_like(train_loader.dataset[0]['answer'][:-50])
# for sample in train_loader.dataset:
# class_frequence += torch.ceil(sample['answer'][:-50])
# class_weight = torch.exp(-class_frequence/class_frequence.sum())
# print(class_weight)
lbce = LogitBinaryCrossEntropy()
# 设置优化函数进行学习率
scheduler_func = lambda x: lr_lambda_update(x, **train_config)
lr_scheduler = LambdaLR(optim, lr_lambda = scheduler_func)
# lr_scheduler = ExponentialLR(optim, 0.5**(1/50000))
iteration = 0
best_val_accuracy = 0
best_epoch = 0
patient = 0
saving_epoch = 4
log_train_accuracy = {}
log_train_loss = {}
if val_loader is not None:
log_val_loss = {}
log_val_accuracy = {}
for epoch in range(1,train_config["epoch"]+1):
# while iteration < train_config["max_iterations"]:
model.train()
log_msg = "Epoch %d of Train:"%(
epoch
)
print(log_msg)
total_accuracy = 0
total_loss = 0
for i, sample in enumerate(train_loader):
iteration += 1
input_ids = Variable(sample["input_ids"])
token_type_ids = Variable(sample["token_type_ids"])
attention_mask = Variable(sample["attention_mask"])
img = Variable(sample["img_feature"])
# context = Variable(torch.zeros_like(sample["context_feature"]))
context = Variable(sample["context_feature"])
labels = Variable(sample['answer'])
bbox = Variable(sample['bbox'])
ocrbbox = Variable(sample['ocrbbox'])
if gpu:
input_ids = input_ids.cuda()
token_type_ids = token_type_ids.cuda()
attention_mask = attention_mask.cuda()
img = img.cuda()
context = context.cuda()
labels = labels.cuda()
bbox = bbox.cuda()
ocrbbox = ocrbbox.cuda()
batch_size = img.size(0)
prediction = model(img, bbox, input_ids, token_type_ids, attention_mask, context, ocrbbox)
loss, lc, lo = lbce(labels, prediction)
if epoch<=13:
loss.backward()
elif epoch%2 ==0 :
lc.backward()
else :
lo.backward()
# if (i+1)%2==0:
lr_scheduler.step(epoch)
clip_gradients(model, train_config["max_grad_l2_norm"], train_config["clip_norm_mode"])
optim.step()
optim.zero_grad()
# 统计精度
batch_accuracy = accuracy(labels.data,prediction.data)
total_accuracy += batch_accuracy * batch_size
# 统计loss
total_loss += loss.data
if (i+1)%10 == 0:
log_msg = "[%d/%d/%d] iter:%d accuracy:%2.2f loss:%.5f lr: %f"%(
epoch,
len(train_loader),
i,
iteration,
batch_accuracy*100,
loss.data,
optim.param_groups[0]['lr']
)
print(log_msg)
if val_loader is not None:
log_msg = "Epoch %d of Valuation:"%(
epoch
)
print(log_msg)
val_accuracy, val_loss = evaluate(model, val_loader, logger, gpu, **train_config)
print("Result")
log_msg = "Train accuracy:%2.2f, Train loss: %.5f"%(
total_accuracy/len(train_loader.dataset)*100,
total_loss/len(train_loader.dataset)
)
if val_loader is not None:
log_msg += ", Val accuracy:%2.2f, Val loss: %.5f" % (val_accuracy*100, val_loss)
print(log_msg)
log_train_accuracy["epoch "+str(epoch)] = total_accuracy.cpu().numpy().tolist()/len(train_loader.dataset)*100
log_train_loss["epoch "+str(epoch)] = total_loss.cpu().numpy().tolist()/len(train_loader.dataset)
if val_loader is not None:
log_val_accuracy["epoch "+str(epoch)] = val_accuracy.cpu().numpy().tolist()*100
log_val_loss["epoch "+str(epoch)] = val_loss.cpu().numpy().tolist()
if (val_loader is not None and val_accuracy > best_val_accuracy) or (val_loader is None and epoch >= saving_epoch):
model_name = 'model_%s.pth'%('epoch'+str(epoch) if val_loader is None else 'best')
model_path = os.path.join(output, model_name)
utils.save_model(model_path, model, epoch, optim)
if val_loader is not None:
best_val_accuracy = val_accuracy
best_epoch = epoch
patient = 0
elif val_loader is not None:
patient += 1
if patient >= 15:
print("Patient %d early stop!!"%patient)
break
print("Patient %d"%patient)
log_msg = "best val accuracy : %2.2f at %d epoch. "%( best_val_accuracy*100, best_epoch)
print(log_msg)
logger.add("train accuracy", log_train_accuracy)
logger.add("train loss", log_train_loss)
if val_loader is not None:
logger.add("best val accuracy", best_val_accuracy.cpu().numpy().tolist())
logger.add("best_epoch", best_epoch)
logger.add("val loss", log_val_loss)
logger.add("val accuracy", log_val_accuracy)
logger.save_log()
def train(
model_name,
data_loader,
encoder,
decoder,
encoder_optimizer,
decoder_optimizer,
epoch,
grad_clip,
print_freq,
):
"""
Perform one training epoch.
"""
decoder.train()
if encoder:
encoder.train()
losses = AverageMeter()
# Loop over training batches
for i, (images, target_captions,
caption_lengths) in enumerate(data_loader):
target_captions = target_captions.to(device)
caption_lengths = caption_lengths.to(device)
images = images.to(device)
# Forward propagation
if encoder:
images = encoder(images)
decode_lengths = caption_lengths.squeeze(1) - 1
if model_name == MODEL_BOTTOM_UP_TOP_DOWN_RANKING:
scores, decode_lengths, images_embedded, captions_embedded, alphas = decoder.forward_joint(
images, target_captions, decode_lengths)
loss = decoder.loss(scores, target_captions, decode_lengths,
alphas)
else:
scores, decode_lengths, alphas = decoder(images, target_captions,
decode_lengths)
loss = decoder.loss(scores, target_captions, decode_lengths,
alphas)
decoder_optimizer.zero_grad()
if encoder_optimizer:
encoder_optimizer.zero_grad()
loss.backward()
# Clip gradients
if grad_clip:
clip_gradients(decoder_optimizer, grad_clip)
if encoder_optimizer:
clip_gradients(encoder_optimizer, grad_clip)
# Update weights
decoder_optimizer.step()
if encoder_optimizer:
encoder_optimizer.step()
# Keep track of metrics
losses.update(loss.item(), sum(decode_lengths).item())
# Log status
if i % print_freq == 0:
logging.info(
"Epoch: {0}[Batch {1}/{2}]\t"
"Loss: {loss.val:.4f} (Average: {loss.avg:.4f})\t".format(
epoch, i, len(data_loader), loss=losses))
logging.info("\n * LOSS - {loss.avg:.3f}\n".format(loss=losses))
def main(argv):
del argv # unused
np.random.seed(FLAGS.seed)
#tf.compat.v1.set_random_seed(FLAGS.seed)
print("Testing: ", FLAGS.testing, f"\t Seed: {FLAGS.seed}")
FLAGS.encoder_sizes = [int(size) for size in FLAGS.encoder_sizes]
FLAGS.decoder_sizes = [int(size) for size in FLAGS.decoder_sizes]
if 0 in FLAGS.encoder_sizes:
FLAGS.encoder_sizes.remove(0)
if 0 in FLAGS.decoder_sizes:
FLAGS.decoder_sizes.remove(0)
# Make up full exp name
timestamp = datetime.now().strftime("%y%m%d")
full_exp_name = "{}_{}".format(timestamp, FLAGS.exp_name)
outdir = os.path.join(FLAGS.basedir, full_exp_name)
if not os.path.exists(outdir):
os.makedirs(outdir)
checkpoint_prefix = os.path.join(outdir, "ckpt")
print("Full exp name: ", full_exp_name)
###################################
# Define data specific parameters #
###################################
if FLAGS.data_type == "hmnist":
FLAGS.data_dir = "data/hmnist/hmnist_mnar.npz"
data_dim = 784
time_length = 10
num_classes = 10
decoder = BernoulliDecoder
img_shape = (28, 28, 1)
val_split = 50000
elif FLAGS.data_type == "physionet":
if FLAGS.data_dir == "":
FLAGS.data_dir = "data/physionet/physionet.npz"
data_dim = 35
time_length = 48
num_classes = 2
decoder = GaussianDecoder
elif FLAGS.data_type == "sprites":
if FLAGS.data_dir == "":
FLAGS.data_dir = "data/sprites/sprites.npz"
data_dim = 12288
time_length = 8
decoder = GaussianDecoder
img_shape = (64, 64, 3)
val_split = 8000
else:
raise ValueError(
"Data type must be one of ['hmnist', 'physionet', 'sprites']")
#############
# Load data #
#############
data = np.load(FLAGS.data_dir)
x_train_full = data['x_train_full']
x_train_miss = data['x_train_miss']
m_train_miss = data['m_train_miss']
if FLAGS.data_type in ['hmnist', 'physionet']:
y_train = data['y_train']
if FLAGS.testing:
if FLAGS.data_type in ['hmnist', 'sprites']:
x_val_full = data['x_test_full']
x_val_miss = data['x_test_miss']
m_val_miss = data['m_test_miss']
if FLAGS.data_type == 'hmnist':
y_val = data['y_test']
elif FLAGS.data_type == 'physionet':
x_val_full = data['x_train_full']
x_val_miss = data['x_train_miss']
m_val_miss = data['m_train_miss']
y_val = data['y_train']
m_val_artificial = data["m_train_artificial"]
elif FLAGS.data_type in ['hmnist', 'sprites']:
x_val_full = x_train_full[val_split:]
x_val_miss = x_train_miss[val_split:]
m_val_miss = m_train_miss[val_split:]
if FLAGS.data_type == 'hmnist':
y_val = y_train[val_split:]
x_train_full = x_train_full[:val_split]
x_train_miss = x_train_miss[:val_split]
m_train_miss = m_train_miss[:val_split]
y_train = y_train[:val_split]
elif FLAGS.data_type == 'physionet':
x_val_full = data["x_val_full"] # full for artificial missings
x_val_miss = data["x_val_miss"]
m_val_miss = data["m_val_miss"]
m_val_artificial = data["m_val_artificial"]
y_val = data["y_val"]
else:
raise ValueError(
"Data type must be one of ['hmnist', 'physionet', 'sprites']")
tf_x_train_miss = DataLoader(MyDataset(x_train_miss, m_train_miss),
shuffle=True,
batch_size=FLAGS.batch_size)
tf_x_val_miss = iter(
DataLoader(MyDataset(x_val_miss, m_val_miss),
batch_size=FLAGS.batch_size,
shuffle=False))
tf_x_test_miss = DataLoader(MyDataset(x_val_miss, m_val_miss),
batch_size=len(x_val_miss),
shuffle=False)
# Build Conv2D preprocessor for image data
if FLAGS.data_type in ['hmnist', 'sprites']:
print("Using CNN preprocessor")
image_preprocessor = ImagePreprocessor(img_shape, FLAGS.cnn_sizes,
FLAGS.cnn_kernel_size)
elif FLAGS.data_type == 'physionet':
image_preprocessor = None
else:
raise ValueError(
"Data type must be one of ['hmnist', 'physionet', 'sprites']")
###############
# Build model #
###############
if FLAGS.model_type == "vae":
model = VAE(latent_dim=FLAGS.latent_dim,
data_dim=data_dim,
time_length=time_length,
encoder_sizes=FLAGS.encoder_sizes,
encoder=DiagonalEncoder,
decoder_sizes=FLAGS.decoder_sizes,
decoder=decoder,
image_preprocessor=image_preprocessor,
window_size=FLAGS.window_size,
beta=FLAGS.beta,
M=FLAGS.M,
K=FLAGS.K)
elif FLAGS.model_type == "hi-vae":
model = HI_VAE(latent_dim=FLAGS.latent_dim,
data_dim=data_dim,
time_length=time_length,
encoder_sizes=FLAGS.encoder_sizes,
encoder=DiagonalEncoder,
decoder_sizes=FLAGS.decoder_sizes,
decoder=decoder,
image_preprocessor=image_preprocessor,
window_size=FLAGS.window_size,
beta=FLAGS.beta,
M=FLAGS.M,
K=FLAGS.K)
elif FLAGS.model_type == "gp-vae":
encoder = BandedJointEncoder if FLAGS.banded_covar else JointEncoder
model = GP_VAE(latent_dim=FLAGS.latent_dim,
data_dim=data_dim,
time_length=time_length,
encoder_sizes=FLAGS.encoder_sizes,
encoder=encoder,
decoder_sizes=FLAGS.decoder_sizes,
decoder=decoder,
kernel=FLAGS.kernel,
sigma=FLAGS.sigma,
length_scale=FLAGS.length_scale,
kernel_scales=FLAGS.kernel_scales,
image_preprocessor=image_preprocessor,
window_size=FLAGS.window_size,
beta=FLAGS.beta,
M=FLAGS.M,
K=FLAGS.K)
else:
raise ValueError(
"Model type must be one of ['vae', 'hi-vae', 'gp-vae']")
clip_gradients(model, FLAGS.gradient_clip)
########################
# Training preparation #
########################
print("GPU support: ", tf.test.is_gpu_available())
print("Training...")
#_ = tf.compat.v1.train.get_or_create_global_step()
#trainable_vars = model.get_trainable_vars()
#optimizer = tf.compat.v1.train.AdamOptimizer(learning_rate=FLAGS.learning_rate)
optimizer = optim.Adam(model.parameters(), lr=1e-3)
print("Encoder: ", model.encoder)
print("Decoder: ", model.decoder)
if model.preprocessor is not None:
print("Preprocessor: ", model.preprocessor.net.summary())
#saver = tf.compat.v1.train.Checkpoint(optimizer=optimizer, encoder=model.encoder.net,
# decoder=model.decoder.net, preprocessor=model.preprocessor.net,
# optimizer_step=tf.compat.v1.train.get_or_create_global_step())
else:
#saver = tf.compat.v1.train.Checkpoint(optimizer=optimizer, encoder=model.encoder.net, decoder=model.decoder.net,
# optimizer_step=tf.compat.v1.train.get_or_create_global_step())
pass
#summary_writer = tf.contrib.summary.create_file_writer(outdir, flush_millis=10000)
if FLAGS.num_steps == 0:
num_steps = FLAGS.num_epochs * len(x_train_miss) // FLAGS.batch_size
else:
num_steps = FLAGS.num_steps
if FLAGS.print_interval == 0:
FLAGS.print_interval = num_steps // FLAGS.num_epochs
############
# Training #
############
losses_train = []
losses_val = []
t0 = time.time()
#with summary_writer.as_default(), tf.contrib.summary.always_record_summaries():
for i, (x_seq, m_seq) in enumerate(tf_x_train_miss):
if i >= num_steps:
break
try:
#print(x_seq.shape)
optimizer.zero_grad()
#with tf.GradientTape() as tape:
# tape.watch(trainable_vars)
loss = model.compute_loss(x_seq, m_mask=m_seq)
losses_train.append(loss.detach().numpy())
#grads = loss.grad
#print(grads)
#grads = tape.gradient(loss, trainable_vars)
#grads = [np.nan_to_num(grad) for grad in grads]
#t#orch.nn.utils.clip_grad_norm(model.parameters(),clip)
#grads, global_norm = tf.clip_by_global_norm(grads, FLAGS.gradient_clip)
optimizer.step()
#optimizer.apply_gradients(zip(grads, trainable_vars),
# global_step=tf.compat.v1.train.get_or_create_global_step())
# Print intermediate results
if i % FLAGS.print_interval == 0:
print("================================================")
print("Learning rate: {} | Global gradient norm: ".format(
optimizer.param_groups[0]['lr']))
print("Step {}) Time = {:2f}".format(i, time.time() - t0))
loss, nll, kl = model.compute_loss(x_seq,
m_mask=m_seq,
return_parts=True)
print(
"Train loss = {:.3f} | NLL = {:.3f} | KL = {:.3f}".format(
loss, nll, kl))
torch.save(model, checkpoint_prefix)
#saver.save(checkpoint_prefix)
print("loss_train", loss)
print("kl_train", kl)
print("nll_train", nll)
#tf.contrib.summary.scalar("nll_train", nll)
# Validation loss
x_val_batch, m_val_batch = next(tf_x_val_miss)
val_loss, val_nll, val_kl = model.compute_loss(
x_val_batch, m_mask=m_val_batch, return_parts=True)
losses_val.append(val_loss.detach().numpy())
print("Validation loss = {:.3f} | NLL = {:.3f} | KL = {:.3f}".
format(val_loss, val_nll, val_kl))
print("loss_val", val_loss)
print("kl_val", val_kl)
print("nll_val", val_nll)
if FLAGS.data_type in ["hmnist", "sprites"]:
# Draw reconstructed images
x_hat = model.decode(model.encode(x_seq).sample()).mean
tf.contrib.summary.image(
"input_train", x_seq.reshape([-1] + list(img_shape)))
tf.contrib.summary.image(
"reconstruction_train",
x_hat.reshape([-1] + list(img_shape)))
elif FLAGS.data_type == 'physionet':
# Eval MSE and AUROC on entire val set
x_val_miss_batches = np.array_split(x_val_miss,
FLAGS.batch_size,
axis=0)
x_val_full_batches = np.array_split(x_val_full,
FLAGS.batch_size,
axis=0)
m_val_artificial_batches = np.array_split(m_val_artificial,
FLAGS.batch_size,
axis=0)
get_val_batches = lambda: zip(x_val_miss_batches,
x_val_full_batches,
m_val_artificial_batches)
n_missings = m_val_artificial.sum()
mse_miss = np.sum([
model.compute_mse(x, y=y, m_mask=m).item()
for x, y, m in get_val_batches()
]) / n_missings
x_val_imputed = np.vstack([
model.decode(
model.encode(x_batch).mean).mean.detach().numpy()
for x_batch in x_val_miss_batches
])
x_val_imputed[m_val_miss == 0] = x_val_miss[
m_val_miss == 0] # impute gt observed values
x_val_imputed = x_val_imputed.reshape(
[-1, time_length * data_dim])
val_split = len(x_val_imputed) // 2
cls_model = LogisticRegression(solver='liblinear',
tol=1e-10,
max_iter=10000)
cls_model.fit(x_val_imputed[:val_split], y_val[:val_split])
probs = cls_model.predict_proba(
x_val_imputed[val_split:])[:, 1]
auroc = roc_auc_score(y_val[val_split:], probs)
print("MSE miss: {:.4f} | AUROC: {:.4f}".format(
mse_miss, auroc))
# Update learning rate (used only for physionet with decay=0.5)
if i > 0 and i % (10 * FLAGS.print_interval) == 0:
optimizer._lr = max(0.5 * optimizer._lr,
0.1 * FLAGS.learning_rate)
t0 = time.time()
except KeyboardInterrupt:
saver.save(checkpoint_prefix)
if FLAGS.debug:
import ipdb
ipdb.set_trace()
break
##############
# Evaluation #
##############
print("Evaluation...")
# Split data on batches
x_val_miss_batches = np.array_split(x_val_miss, FLAGS.batch_size, axis=0)
x_val_full_batches = np.array_split(x_val_full, FLAGS.batch_size, axis=0)
if FLAGS.data_type == 'physionet':
m_val_batches = np.array_split(m_val_artificial,
FLAGS.batch_size,
axis=0)
else:
m_val_batches = np.array_split(m_val_miss, FLAGS.batch_size, axis=0)
get_val_batches = lambda: zip(x_val_miss_batches, x_val_full_batches,
m_val_batches)
# Compute NLL and MSE on missing values
n_missings = m_val_artificial.sum(
) if FLAGS.data_type == 'physionet' else m_val_miss.sum()
nll_miss = np.sum([
model.compute_nll(x, y=y, m_mask=m).item() #.detach().numpy()
for x, y, m in get_val_batches()
]) / n_missings
mse_miss = np.sum([
model.compute_mse(x, y=y, m_mask=m, binary=FLAGS.data_type
== "hmnist").item() #.detach().numpy()
for x, y, m in get_val_batches()
]) / n_missings
print("NLL miss: {:.4f}".format(nll_miss))
print("MSE miss: {:.4f}".format(mse_miss))
# Save imputed values
z_mean = [
model.encode(x_batch).mean.detach().numpy()
for x_batch in x_val_miss_batches
]
np.save(os.path.join(outdir, "z_mean"), np.vstack(z_mean))
x_val_imputed = np.vstack(
[model.decode(z_batch).mean.detach().numpy() for z_batch in z_mean])
np.save(os.path.join(outdir, "imputed_no_gt"), x_val_imputed)
# impute gt observed values
x_val_imputed[m_val_miss == 0] = x_val_miss[m_val_miss == 0]
np.save(os.path.join(outdir, "imputed"), x_val_imputed)
if FLAGS.data_type == "hmnist":
# AUROC evaluation using Logistic Regression
x_val_imputed = np.round(x_val_imputed)
x_val_imputed = x_val_imputed.reshape([-1, time_length * data_dim])
cls_model = LogisticRegression(solver='lbfgs',
multi_class='multinomial',
tol=1e-10,
max_iter=10000)
val_split = len(x_val_imputed) // 2
cls_model.fit(x_val_imputed[:val_split], y_val[:val_split])
probs = cls_model.predict_proba(x_val_imputed[val_split:])
auprc = average_precision_score(
np.eye(num_classes)[y_val[val_split:]], probs)
auroc = roc_auc_score(np.eye(num_classes)[y_val[val_split:]], probs)
print("AUROC: {:.4f}".format(auroc))
print("AUPRC: {:.4f}".format(auprc))
elif FLAGS.data_type == "sprites":
auroc, auprc = 0, 0
elif FLAGS.data_type == "physionet":
# Uncomment to preserve some z_samples and their reconstructions
# for i in range(5):
# z_sample = [model.encode(x_batch).sample().numpy() for x_batch in x_val_miss_batches]
# np.save(os.path.join(outdir, "z_sample_{}".format(i)), np.vstack(z_sample))
# x_val_imputed_sample = np.vstack([model.decode(z_batch).mean().numpy() for z_batch in z_sample])
# np.save(os.path.join(outdir, "imputed_sample_{}_no_gt".format(i)), x_val_imputed_sample)
# x_val_imputed_sample[m_val_miss == 0] = x_val_miss[m_val_miss == 0]
# np.save(os.path.join(outdir, "imputed_sample_{}".format(i)), x_val_imputed_sample)
# AUROC evaluation using Logistic Regression
x_val_imputed = x_val_imputed.reshape([-1, time_length * data_dim])
val_split = len(x_val_imputed) // 2
cls_model = LogisticRegression(solver='liblinear',
tol=1e-10,
max_iter=10000)
cls_model.fit(x_val_imputed[:val_split], y_val[:val_split])
probs = cls_model.predict_proba(x_val_imputed[val_split:])[:, 1]
auprc = average_precision_score(y_val[val_split:], probs)
auroc = roc_auc_score(y_val[val_split:], probs)
print("AUROC: {:.4f}".format(auroc))
print("AUPRC: {:.4f}".format(auprc))
# Visualize reconstructions
if FLAGS.data_type in ["hmnist", "sprites"]:
img_index = 0
if FLAGS.data_type == "hmnist":
img_shape = (28, 28)
cmap = "gray"
elif FLAGS.data_type == "sprites":
img_shape = (64, 64, 3)
cmap = None
fig, axes = plt.subplots(nrows=3,
ncols=x_val_miss.shape[1],
figsize=(2 * x_val_miss.shape[1], 6))
x_hat = model.decode(
model.encode(x_val_miss[img_index:img_index +
1]).mean()).mean().numpy()
seqs = [
x_val_miss[img_index:img_index + 1], x_hat,
x_val_full[img_index:img_index + 1]
]
for axs, seq in zip(axes, seqs):
for ax, img in zip(axs, seq[0]):
ax.imshow(img.reshape(img_shape), cmap=cmap)
ax.axis('off')
suptitle = FLAGS.model_type + f" reconstruction, NLL missing = {mse_miss}"
fig.suptitle(suptitle, size=18)
fig.savefig(
os.path.join(outdir, FLAGS.data_type + "_reconstruction.pdf"))
results_all = [
FLAGS.seed, FLAGS.model_type, FLAGS.data_type, FLAGS.kernel,
FLAGS.beta, FLAGS.latent_dim, FLAGS.num_epochs, FLAGS.batch_size,
FLAGS.learning_rate, FLAGS.window_size, FLAGS.kernel_scales,
FLAGS.sigma, FLAGS.length_scale,
len(FLAGS.encoder_sizes),
FLAGS.encoder_sizes[0] if len(FLAGS.encoder_sizes) > 0 else 0,
len(FLAGS.decoder_sizes),
FLAGS.decoder_sizes[0] if len(FLAGS.decoder_sizes) > 0 else 0,
FLAGS.cnn_kernel_size, FLAGS.cnn_sizes, nll_miss, mse_miss,
losses_train[-1], losses_val[-1], auprc, auroc, FLAGS.testing,
FLAGS.data_dir
]
with open(os.path.join(outdir, "results.tsv"), "w") as outfile:
outfile.write(
"seed\tmodel\tdata\tkernel\tbeta\tz_size\tnum_epochs"
"\tbatch_size\tlearning_rate\twindow_size\tkernel_scales\t"
"sigma\tlength_scale\tencoder_depth\tencoder_width\t"
"decoder_depth\tdecoder_width\tcnn_kernel_size\t"
"cnn_sizes\tNLL\tMSE\tlast_train_loss\tlast_val_loss\tAUPRC\tAUROC\ttesting\tdata_dir\n"
)
outfile.write("\t".join(map(str, results_all)))
with open(os.path.join(outdir, "training_curve.tsv"), "w") as outfile:
outfile.write("\t".join(map(str, losses_train)))
outfile.write("\n")
outfile.write("\t".join(map(str, losses_val)))
print("Training finished.")
def main():
is_training = tf.placeholder(tf.bool, name='is_training')
num_class = args.num_way
num_shot = args.num_shot
num_query = args.num_query
keep_prob = tf.placeholder(tf.float32, name='keep_prob')
support_label = tf.placeholder(tf.int32, (None, ), 'support_label')
query_label = tf.placeholder(tf.int32, (None, ), 'query_label')
support_x = tf.placeholder(tf.float32, (None, 640), 'support_x')
query_x = tf.placeholder(tf.float32, (None, 640), 'query_x')
support_feature = support_x
query_feature = query_x
support_feature = tf.reshape(support_feature,
(batch_size, num_class, num_shot, 640))
query_feature = tf.reshape(query_feature,
(batch_size, num_class, num_query, 640))
support_label_reshape = tf.reshape(support_label,
(batch_size, num_class, num_shot))
query_label_reshape = tf.reshape(query_label,
(batch_size, num_class, num_query))
awgim = model.AWGIM(args, keep_prob, is_training)
loss_cls, accuracy, tr_loss, tr_accuracy, support_reconstruction, query_reconstruction = \
awgim.forward(support_feature, support_label_reshape, query_feature, query_label_reshape)
reg_term = tf.add_n([
tf.nn.l2_loss(v) for v in tf.trainable_variables()
if 'kernel' in v.name
])
loss_meta = loss_cls + args.alpha_1 * tr_loss + args.alpha_2 * support_reconstruction + args.alpha_3 * query_reconstruction
Batch = tf.Variable(0,
trainable=False,
dtype=tf.float32,
name='global_step')
learning_rate = tf.train.exponential_decay(
learning_rate=args.learning_rate,
global_step=Batch,
decay_steps=args.step_size,
decay_rate=0.2,
staircase=True)
optim = tf.contrib.opt.AdamWOptimizer(learning_rate=learning_rate,
weight_decay=args.weight_decay)
meta_weights = [v for v in tf.trainable_variables()]
print(meta_weights)
if args.stage == 'train':
meta_gradients = utils.grads_and_vars(loss_meta, meta_weights,
reg_term)
meta_gradients = utils.clip_gradients(meta_gradients,
args.gradient_threshold,
args.gradient_norm_threshold)
train_op = optim.apply_gradients(zip(meta_gradients, meta_weights),
global_step=Batch)
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
saver = tf.train.Saver()
sess.run(tf.global_variables_initializer())
save_path = utils.save(args)
print(save_path)
os.makedirs(save_path, exist_ok=True)
if args.stage == 'test':
print(tf.train.latest_checkpoint(save_path))
saver.restore(sess, tf.train.latest_checkpoint(save_path))
print('load model')
if args.data_set == 'mini':
loader_train = dataset_mini.dataset_mini('train', args)
loader_val = dataset_mini.dataset_mini('val', args)
loader_test = dataset_mini.dataset_mini('test', args)
else:
loader_train = dataset_tiered.dataset_tiered('train', args)
loader_val = dataset_tiered.dataset_tiered('val', args)
loader_test = dataset_tiered.dataset_tiered('test', args)
if args.stage == 'train':
print('Load PKL data')
loader_train.load_data_pkl()
loader_val.load_data_pkl()
else:
loader_test.load_data_pkl()
val_best_accuracy = 0.
n_iter = 0
record_val_acc = []
if args.stage == 'train':
for epoch in range(args.epoch):
training_accuracy, training_loss, acc_cp, acc_real, c_loss, d_loss, g_loss = [], [], [], [], [], [], []
# training_loss_cls = []
for epi in range(100):
support_input, s_labels, query_input, q_labels = utils.load_batch(
args, loader_train, args.batch_size, True, loader_val)
feed_dict = {
support_x: support_input,
support_label: s_labels,
query_x: query_input,
query_label: q_labels,
is_training: True,
keep_prob: 1. - args.dropout
}
outs = sess.run([train_op, loss_meta, accuracy, Batch],
feed_dict=feed_dict)
training_accuracy.append(outs[2])
training_loss.append(outs[1])
n_iter += 1
if (epoch + 1) % 3 == 0:
log = 'epoch: ', epoch + 1, 'accuracy: ', np.mean(
training_accuracy), 'loss: ', np.mean(training_loss)
print(log)
if (epoch + 1) % 3 == 0:
accuracy_val = []
loss_val = []
for epi in range(100):
support_input, s_labels, query_input, q_labels = utils.load_batch(
args, loader_val, args.batch_size, training=False)
outs = sess.run(
[loss_meta, accuracy, Batch],
feed_dict={
support_x: support_input,
support_label: s_labels,
query_x: query_input,
query_label: q_labels,
is_training: False,
keep_prob: 1.
})
accuracy_val.append(outs[1])
loss_val.append(outs[0])
mean_acc = np.mean(accuracy_val)
std_acc = np.std(accuracy_val)
ci95 = 1.96 * std_acc / np.sqrt(100)
print(
' Val Acc:{:.4f},std:{:.4f},ci95:{:.4f}'.format(
mean_acc, std_acc, ci95), 'at epoch: ', epoch + 1)
record_val_acc.append(mean_acc)
if mean_acc > val_best_accuracy:
val_best_accuracy = mean_acc
saver.save(sess,
save_path=save_path + 'model.ckpt',
global_step=Batch)
if (epoch + 1) % 100 == 0:
saver.save(sess,
save_path=save_path + 'model.ckpt',
global_step=Batch)
elif args.stage == 'test':
accuracy_test = []
loss_test = []
num = 600
for epi in range(num):
support_input, s_labels, query_input, q_labels = utils.load_batch(
args, loader_test, args.batch_size, False)
outs = sess.run(
[loss_meta, accuracy],
feed_dict={
support_x: support_input,
support_label: s_labels,
query_x: query_input,
query_label: q_labels,
is_training: False,
keep_prob: 1.
})
accuracy_test.append(outs[1])
loss_test.append(outs[0])
mean_acc = np.mean(accuracy_test)
std_acc = np.std(accuracy_test)
ci95 = 1.96 * std_acc / np.sqrt(num)
print('Acc:{:.4f},std:{:.4f},ci95:{:.4f}'.format(
mean_acc, std_acc, ci95))
sess.close()
def main():
parser = argparse.ArgumentParser(
"DINO training CLI",
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
parser.add_argument("-b", "--batch-size", type=int, default=4)
parser.add_argument("-d",
"--device",
type=str,
choices=("cpu", "cuda"),
default="cuda")
parser.add_argument("-l", "--logging-freq", type=int, default=200)
parser.add_argument("--momentum-teacher", type=int, default=0.9995)
parser.add_argument("-c", "--n-crops", type=int, default=4)
parser.add_argument("-e", "--n-epochs", type=int, default=100)
parser.add_argument("-o", "--out-dim", type=int, default=1024)
parser.add_argument("-t", "--tensorboard-dir", type=str, default="logs")
parser.add_argument("--clip-grad", type=float, default=2.0)
parser.add_argument("--norm-last-layer", action="store_true")
parser.add_argument("--batch-size-eval", type=int, default=8)
parser.add_argument("--teacher-temp", type=float, default=0.04)
parser.add_argument("--student-temp", type=float, default=0.1)
parser.add_argument("--pretrained", action="store_true")
parser.add_argument("-w", "--weight-decay", type=float, default=0.4)
args = parser.parse_args()
print(vars(args))
# Parameters
vit_name, dim = "deit_small_patch16_224", 384
path_dataset_train = pathlib.Path("data/imagenette2-320/train")
path_dataset_val = pathlib.Path("data/imagenette2-320/val")
path_labels = pathlib.Path("data/imagenette_labels.json")
logging_path = pathlib.Path(args.tensorboard_dir)
device = torch.device(args.device)
n_workers = 1 # para mi maquinita solo 2 como maximo
# Data related
with path_labels.open("r") as f:
label_mapping = json.load(f)
transform_aug = DataAugmentation(size=224, n_local_crops=args.n_crops - 2)
transform_plain = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize((0.485, 0.456, 0.406), (0.229, 0.224, 0.225)),
transforms.Resize((224, 224)),
])
dataset_train_aug = ImageFolder(path_dataset_train,
transform=transform_aug)
dataset_train_plain = ImageFolder(path_dataset_train,
transform=transform_plain)
dataset_val_plain = ImageFolder(path_dataset_val,
transform=transform_plain)
if dataset_train_plain.classes != dataset_val_plain.classes:
raise ValueError("Inconsistent classes")
data_loader_train_aug = DataLoader(
dataset_train_aug,
batch_size=args.batch_size,
shuffle=True,
drop_last=True,
num_workers=n_workers,
pin_memory=True,
)
data_loader_train_plain = DataLoader(
dataset_train_plain,
batch_size=args.batch_size_eval,
drop_last=False,
num_workers=n_workers,
)
data_loader_val_plain = DataLoader(
dataset_val_plain,
batch_size=args.batch_size_eval,
drop_last=False,
num_workers=n_workers,
)
data_loader_val_plain_subset = DataLoader(
dataset_val_plain,
batch_size=args.batch_size_eval,
drop_last=False,
sampler=SubsetRandomSampler(list(range(0, len(dataset_val_plain),
50))),
num_workers=n_workers,
)
# Logging
writer = SummaryWriter(logging_path)
writer.add_text("arguments", json.dumps(vars(args)))
# Neural network related
student_vit = timm.create_model(vit_name, pretrained=args.pretrained)
teacher_vit = timm.create_model(vit_name, pretrained=args.pretrained)
student = MultiCropWrapper(
student_vit,
Head(
dim,
args.out_dim,
norm_last_layer=args.norm_last_layer,
),
)
teacher = MultiCropWrapper(teacher_vit, Head(dim, args.out_dim))
student, teacher = student.to(device), teacher.to(device)
teacher.load_state_dict(student.state_dict())
for p in teacher.parameters():
p.requires_grad = False
# Loss related
loss_inst = Loss(
args.out_dim,
teacher_temp=args.teacher_temp,
student_temp=args.student_temp,
).to(device)
lr = 0.0005 * args.batch_size / 256
optimizer = torch.optim.AdamW(
student.parameters(),
lr=lr,
weight_decay=args.weight_decay,
)
# Training loop
n_batches = len(dataset_train_aug) // args.batch_size
best_acc = 0
n_steps = 0
for e in range(args.n_epochs):
for i, (images, _) in tqdm.tqdm(enumerate(data_loader_train_aug),
total=n_batches):
if n_steps % args.logging_freq == 0:
student.eval()
# Embedding
embs, imgs, labels_ = compute_embedding(
student.backbone,
data_loader_val_plain_subset,
)
writer.add_embedding(
embs,
metadata=[label_mapping[l] for l in labels_],
label_img=imgs,
global_step=n_steps,
tag="embeddings",
)
# KNN
current_acc = compute_knn(
student.backbone,
data_loader_train_plain,
data_loader_val_plain,
)
writer.add_scalar("knn-accuracy", current_acc, n_steps)
if current_acc > best_acc:
torch.save(student, logging_path / "best_model.pth")
best_acc = current_acc
student.train()
images = [img.to(device) for img in images]
teacher_output = teacher(images[:2])
student_output = student(images)
loss = loss_inst(student_output, teacher_output)
optimizer.zero_grad()
loss.backward()
clip_gradients(student, args.clip_grad)
optimizer.step()
with torch.no_grad():
for student_ps, teacher_ps in zip(student.parameters(),
teacher.parameters()):
teacher_ps.data.mul_(args.momentum_teacher)
teacher_ps.data.add_(
(1 - args.momentum_teacher) * student_ps.detach().data)
writer.add_scalar("train_loss", loss, n_steps)
n_steps += 1
def main(args):
if args.model_name is not None:
print('Preparing to train model: {}'.format(args.model_name))
global device
device = torch.device(
'cuda' if torch.cuda.is_available() and not args.cpu else 'cpu')
sc_will_happen = args.self_critical_from_epoch != -1
if args.validate is None and args.lr_scheduler == 'ReduceLROnPlateau':
print(
'ERROR: you need to enable validation in order to use default lr_scheduler (ReduceLROnPlateau)'
)
print('Hint: use something like --validate=coco:val2017')
sys.exit(1)
# Create model directory
if not os.path.exists(args.model_path):
os.makedirs(args.model_path)
# Image preprocessing, normalization for the pretrained resnet
transform = transforms.Compose([
# transforms.Resize((256, 256)),
transforms.RandomCrop(args.crop_size),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize((0.485, 0.456, 0.406), (0.229, 0.224, 0.225))
])
scorers = {}
if args.validation_scoring is not None or sc_will_happen:
assert not (
args.validation_scoring is None and sc_will_happen
), "Please provide a metric when using self-critical training"
for s in args.validation_scoring.split(','):
s = s.lower().strip()
if s == 'cider':
from eval.cider import Cider
scorers['CIDEr'] = Cider()
if s == 'ciderd':
from eval.ciderD.ciderD import CiderD
scorers['CIDEr-D'] = CiderD(df=args.cached_words)
########################
# Set Model parameters #
########################
# Store parameters gotten from arguments separately:
arg_params = ModelParams.fromargs(args)
print("Model parameters inferred from command arguments: ")
print(arg_params)
start_epoch = 0
###############################
# Load existing model state #
# and update Model parameters #
###############################
state = None
if args.load_model:
try:
state = torch.load(args.load_model, map_location=device)
except AttributeError:
print(
'WARNING: Old model found. Please use model_update.py in the model before executing this script.'
)
exit(1)
new_external_features = arg_params.features.external
params = ModelParams(state, arg_params=arg_params)
if len(new_external_features
) and params.features.external != new_external_features:
print('WARNING: external features changed: ',
params.features.external, new_external_features)
print('Updating feature paths...')
params.update_ext_features(new_external_features)
start_epoch = state['epoch']
print('Loaded model {} at epoch {}'.format(args.load_model,
start_epoch))
else:
params = arg_params
params.command_history = []
if params.rnn_hidden_init == 'from_features' and params.skip_start_token:
print(
"ERROR: Please remove --skip_start_token if you want to use image features "
" to initialize hidden and cell states. <start> token is needed to trigger "
" the process of sequence generation, since we don't have image features "
" embedding as the first input token.")
sys.exit(1)
# Force set the following hierarchical model parameters every time:
if arg_params.hierarchical_model:
params.hierarchical_model = True
params.max_sentences = arg_params.max_sentences
params.weight_sentence_loss = arg_params.weight_sentence_loss
params.weight_word_loss = arg_params.weight_word_loss
params.dropout_stopping = arg_params.dropout_stopping
params.dropout_fc = arg_params.dropout_fc
params.coherent_sentences = arg_params.coherent_sentences
params.coupling_alpha = arg_params.coupling_alpha
params.coupling_beta = arg_params.coupling_beta
assert args.replace or \
not os.path.isdir(os.path.join(args.output_root, args.model_path, get_model_name(args, params))) or \
not (args.load_model and not args.validate_only), \
'{} already exists. If you want to replace it or resume training please use --replace flag. ' \
'If you want to validate a loaded model without training it, use --validate_only flag.' \
'Otherwise specify a different model name using --model_name flag.'\
.format(os.path.join(args.output_root, args.model_path, get_model_name(args, params)))
if args.load_model:
print("Final model parameters (loaded model + command arguments): ")
print(params)
##############################
# Load dataset configuration #
##############################
dataset_configs = DatasetParams(args.dataset_config_file)
if args.dataset is None and not args.validate_only:
print('ERROR: No dataset selected!')
print(
'Please supply a training dataset with the argument --dataset DATASET'
)
print('The following datasets are configured in {}:'.format(
args.dataset_config_file))
for ds, _ in dataset_configs.config.items():
if ds not in ('DEFAULT', 'generic'):
print(' ', ds)
sys.exit(1)
if args.validate_only:
if args.load_model is None:
print(
'ERROR: for --validate_only you need to specify a model to evaluate using --load_model MODEL'
)
sys.exit(1)
else:
dataset_params = dataset_configs.get_params(args.dataset)
for i in dataset_params:
i.config_dict['no_tokenize'] = args.no_tokenize
i.config_dict['show_tokens'] = args.show_tokens
i.config_dict['skip_start_token'] = params.skip_start_token
if params.hierarchical_model:
i.config_dict['hierarchical_model'] = True
i.config_dict['max_sentences'] = params.max_sentences
i.config_dict['crop_regions'] = False
if args.validate is not None:
validation_dataset_params = dataset_configs.get_params(args.validate)
for i in validation_dataset_params:
i.config_dict['no_tokenize'] = args.no_tokenize
i.config_dict['show_tokens'] = args.show_tokens
i.config_dict['skip_start_token'] = params.skip_start_token
if params.hierarchical_model:
i.config_dict['hierarchical_model'] = True
i.config_dict['max_sentences'] = params.max_sentences
i.config_dict['crop_regions'] = False
#######################
# Load the vocabulary #
#######################
# For pre-trained models attempt to obtain
# saved vocabulary from the model itself:
if args.load_model and params.vocab is not None:
print("Loading vocabulary from the model file:")
vocab = params.vocab
else:
if args.vocab is None:
print(
"ERROR: You must specify the vocabulary to be used for training using "
"--vocab flag.\nTry --vocab AUTO if you want the vocabulary to be "
"either generated from the training dataset or loaded from cache."
)
sys.exit(1)
print("Loading / generating vocabulary:")
vocab = get_vocab(args, dataset_params)
print('Size of the vocabulary is {}'.format(len(vocab)))
##########################
# Initialize data loader #
##########################
ext_feature_sets = [
params.features.external, params.persist_features.external
]
if not args.validate_only:
print('Loading dataset: {} with {} workers'.format(
args.dataset, args.num_workers))
if params.skip_start_token:
print("Skipping the use of <start> token...")
data_loader, ef_dims = get_loader(
dataset_params,
vocab,
transform,
args.batch_size,
shuffle=True,
num_workers=args.num_workers,
ext_feature_sets=ext_feature_sets,
skip_images=not params.has_internal_features(),
verbose=args.verbose,
unique_ids=sc_will_happen)
if sc_will_happen:
gts_sc = get_ground_truth_captions(data_loader.dataset)
gts_sc_valid = None
if args.validate is not None:
valid_loader, ef_dims = get_loader(
validation_dataset_params,
vocab,
transform,
args.batch_size,
shuffle=True,
num_workers=args.num_workers,
ext_feature_sets=ext_feature_sets,
skip_images=not params.has_internal_features(),
verbose=args.verbose)
gts_sc_valid = get_ground_truth_captions(
valid_loader.dataset) if sc_will_happen else None
#########################################
# Setup (optional) TensorBoardX logging #
#########################################
writer = None
if args.tensorboard:
if SummaryWriter is not None:
model_name = get_model_name(args, params)
timestamp = datetime.now().strftime('%Y%m%d%H%M%S')
log_dir = os.path.join(
args.output_root, 'log_tb/{}_{}'.format(model_name, timestamp))
writer = SummaryWriter(log_dir=log_dir)
print("INFO: Logging TensorBoardX events to {}".format(log_dir))
else:
print(
"WARNING: SummaryWriter object not available. "
"Hint: Please install TensorBoardX using pip install tensorboardx"
)
######################
# Build the model(s) #
######################
# Set per parameter learning rate here, if supplied by the user:
if args.lr_word_decoder is not None:
if not params.hierarchical_model:
print(
"ERROR: Setting word decoder learning rate currently supported in Hierarchical Model only."
)
sys.exit(1)
lr_dict = {'word_decoder': args.lr_word_decoder}
else:
lr_dict = {}
model = EncoderDecoder(params,
device,
len(vocab),
state,
ef_dims,
lr_dict=lr_dict)
######################
# Optimizer and loss #
######################
sc_activated = False
opt_params = model.get_opt_params()
# Loss and optimizer
if params.hierarchical_model:
criterion = HierarchicalXEntropyLoss(
weight_sentence_loss=params.weight_sentence_loss,
weight_word_loss=params.weight_word_loss)
elif args.share_embedding_weights:
criterion = SharedEmbeddingXentropyLoss(param_lambda=0.15)
else:
criterion = nn.CrossEntropyLoss()
if sc_will_happen: # save it for later
if args.self_critical_loss == 'sc':
from model.loss import SelfCriticalLoss
rl_criterion = SelfCriticalLoss()
elif args.self_critical_loss == 'sc_with_diversity':
from model.loss import SelfCriticalWithDiversityLoss
rl_criterion = SelfCriticalWithDiversityLoss()
elif args.self_critical_loss == 'sc_with_relative_diversity':
from model.loss import SelfCriticalWithRelativeDiversityLoss
rl_criterion = SelfCriticalWithRelativeDiversityLoss()
elif args.self_critical_loss == 'sc_with_bleu_diversity':
from model.loss import SelfCriticalWithBLEUDiversityLoss
rl_criterion = SelfCriticalWithBLEUDiversityLoss()
elif args.self_critical_loss == 'sc_with_repetition':
from model.loss import SelfCriticalWithRepetitionLoss
rl_criterion = SelfCriticalWithRepetitionLoss()
elif args.self_critical_loss == 'mixed':
from model.loss import MixedLoss
rl_criterion = MixedLoss()
elif args.self_critical_loss == 'mixed_with_face':
from model.loss import MixedWithFACELoss
rl_criterion = MixedWithFACELoss(vocab_size=len(vocab))
elif args.self_critical_loss in [
'sc_with_penalty', 'sc_with_penalty_throughout',
'sc_masked_tokens'
]:
raise ValueError('Deprecated loss, use \'sc\' loss')
else:
raise ValueError('Invalid self-critical loss')
print('Selected self-critical loss is', rl_criterion)
if start_epoch >= args.self_critical_from_epoch:
criterion = rl_criterion
sc_activated = True
print('Self-critical loss training begins')
# When using CyclicalLR, default learning rate should be always 1.0
if args.lr_scheduler == 'CyclicalLR':
default_lr = 1.
else:
default_lr = 0.001
if sc_activated:
optimizer = torch.optim.Adam(
opt_params,
lr=args.learning_rate if args.learning_rate else 5e-5,
weight_decay=args.weight_decay)
elif args.optimizer == 'adam':
optimizer = torch.optim.Adam(opt_params,
lr=default_lr,
weight_decay=args.weight_decay)
elif args.optimizer == 'rmsprop':
optimizer = torch.optim.RMSprop(opt_params,
lr=default_lr,
weight_decay=args.weight_decay)
elif args.optimizer == 'sgd':
optimizer = torch.optim.SGD(opt_params,
lr=default_lr,
weight_decay=args.weight_decay)
else:
print('ERROR: unknown optimizer:', args.optimizer)
sys.exit(1)
# We don't want to initialize the optimizer if we are transfering
# the language model from the regular model to hierarchical model
transfer_language_model = False
if arg_params.hierarchical_model and state and not state.get(
'hierarchical_model'):
transfer_language_model = True
# Set optimizer state to the one found in a loaded model, unless
# we are doing a transfer learning step from flat to hierarchical model,
# or we are using self-critical loss,
# or the number of unique parameter groups has changed, or the user
# has explicitly told us *not to* reuse optimizer parameters from before
if state and not transfer_language_model and not sc_activated and not args.optimizer_reset:
# Check that number of parameter groups is the same
if len(optimizer.param_groups) == len(
state['optimizer']['param_groups']):
optimizer.load_state_dict(state['optimizer'])
# override lr if set explicitly in arguments -
# 1) Global learning rate:
if args.learning_rate:
for param_group in optimizer.param_groups:
param_group['lr'] = args.learning_rate
params.learning_rate = args.learning_rate
else:
params.learning_rate = default_lr
# 2) Parameter-group specific learning rate:
if args.lr_word_decoder is not None:
# We want to give user an option to set learning rate for word_decoder
# separately. Other exceptions can be added as needed:
for param_group in optimizer.param_groups:
if param_group.get('name') == 'word_decoder':
param_group['lr'] = args.lr_word_decoder
break
if args.validate is not None and args.lr_scheduler == 'ReduceLROnPlateau':
print('Using ReduceLROnPlateau learning rate scheduler')
scheduler = torch.optim.lr_scheduler.ReduceLROnPlateau(optimizer,
'min',
verbose=True,
patience=2)
elif args.lr_scheduler == 'StepLR':
print('Using StepLR learning rate scheduler with step_size {}'.format(
args.lr_step_size))
# Decrease the learning rate by the factor of gamma at every
# step_size epochs (for example every 5 or 10 epochs):
step_size = args.lr_step_size
scheduler = torch.optim.lr_scheduler.StepLR(optimizer,
step_size,
gamma=0.5,
last_epoch=-1)
elif args.lr_scheduler == 'CyclicalLR':
print(
"Using Cyclical learning rate scheduler, lr range: [{},{}]".format(
args.lr_cyclical_min, args.lr_cyclical_max))
step_size = len(data_loader)
clr = cyclical_lr(step_size,
min_lr=args.lr_cyclical_min,
max_lr=args.lr_cyclical_max)
n_groups = len(optimizer.param_groups)
scheduler = torch.optim.lr_scheduler.LambdaLR(optimizer,
[clr] * n_groups)
elif args.lr_scheduler is not None:
print('ERROR: Invalid learing rate scheduler specified: {}'.format(
args.lr_scheduler))
sys.exit(1)
###################
# Train the model #
###################
stats_postfix = None
if args.validate_only:
stats_postfix = args.validate
if args.load_model:
all_stats = init_stats(args, params, postfix=stats_postfix)
else:
all_stats = {}
if args.force_epoch:
start_epoch = args.force_epoch - 1
if not args.validate_only:
total_step = len(data_loader)
print(
'Start training with start_epoch={:d} num_epochs={:d} num_batches={:d} ...'
.format(start_epoch, args.num_epochs, args.num_batches))
if args.teacher_forcing != 'always':
print('\t k: {}'.format(args.teacher_forcing_k))
print('\t beta: {}'.format(args.teacher_forcing_beta))
print('Optimizer:', optimizer)
if args.validate_only:
stats = {}
teacher_p = 1.0
if args.teacher_forcing != 'always':
print(
'WARNING: teacher_forcing!=always, not yet implemented for --validate_only mode'
)
epoch = start_epoch - 1
if str(epoch +
1) in all_stats.keys() and args.skip_existing_validations:
print('WARNING: epoch {} already validated, skipping...'.format(
epoch + 1))
return
val_loss = do_validate(model, valid_loader, criterion, scorers, vocab,
teacher_p, args, params, stats, epoch,
sc_activated, gts_sc_valid)
all_stats[str(epoch + 1)] = stats
save_stats(args, params, all_stats, postfix=stats_postfix)
else:
for epoch in range(start_epoch, args.num_epochs):
stats = {}
begin = datetime.now()
total_loss = 0
if params.hierarchical_model:
total_loss_sent = 0
total_loss_word = 0
num_batches = 0
vocab_counts = {
'cnt': 0,
'max': 0,
'min': 9999,
'sum': 0,
'unk_cnt': 0,
'unk_sum': 0
}
# If start self critical training
if not sc_activated and sc_will_happen and epoch >= args.self_critical_from_epoch:
if all_stats:
best_ep, best_cider = max(
[(ep, all_stats[ep]['validation_cider'])
for ep in all_stats],
key=lambda x: x[1])
print('Loading model from epoch', best_ep,
'which has the better score with', best_cider)
state = torch.load(
get_model_path(args, params, int(best_ep)))
model = EncoderDecoder(params,
device,
len(vocab),
state,
ef_dims,
lr_dict=lr_dict)
opt_params = model.get_opt_params()
optimizer = torch.optim.Adam(opt_params,
lr=5e-5,
weight_decay=args.weight_decay)
criterion = rl_criterion
print('Self-critical loss training begins')
sc_activated = True
for i, data in enumerate(data_loader):
if params.hierarchical_model:
(images, captions, lengths, image_ids, features,
sorting_order, last_sentence_indicator) = data
sorting_order = sorting_order.to(device)
else:
(images, captions, lengths, image_ids, features) = data
if epoch == 0:
unk = vocab('<unk>')
for j in range(captions.shape[0]):
# Flatten the caption in case it's a paragraph
# this is harmless for regular captions too:
xl = captions[j, :].view(-1)
xw = xl > unk
xu = xl == unk
xwi = sum(xw).item()
xui = sum(xu).item()
vocab_counts['cnt'] += 1
vocab_counts['sum'] += xwi
vocab_counts['max'] = max(vocab_counts['max'], xwi)
vocab_counts['min'] = min(vocab_counts['min'], xwi)
vocab_counts['unk_cnt'] += xui > 0
vocab_counts['unk_sum'] += xui
# Set mini-batch dataset
images = images.to(device)
captions = captions.to(device)
# Remove <start> token from targets if we are initializing the RNN
# hidden state from image features:
if params.rnn_hidden_init == 'from_features' and not params.hierarchical_model:
# Subtract one from all lengths to match new target lengths:
lengths = [x - 1 if x > 0 else x for x in lengths]
targets = pack_padded_sequence(captions[:, 1:],
lengths,
batch_first=True)[0]
else:
if params.hierarchical_model:
targets = prepare_hierarchical_targets(
last_sentence_indicator, args.max_sentences,
lengths, captions, device)
else:
targets = pack_padded_sequence(captions,
lengths,
batch_first=True)[0]
sorting_order = None
init_features = features[0].to(device) if len(
features) > 0 and features[0] is not None else None
persist_features = features[1].to(device) if len(
features) > 1 and features[1] is not None else None
# Forward, backward and optimize
# Calculate the probability whether to use teacher forcing or not:
# Iterate over batches:
iteration = (epoch - start_epoch) * len(data_loader) + i
teacher_p = get_teacher_prob(args.teacher_forcing_k, iteration,
args.teacher_forcing_beta)
# Allow model to log values at the last batch of the epoch
writer_data = None
if writer and (i == len(data_loader) - 1
or i == args.num_batches - 1):
writer_data = {'writer': writer, 'epoch': epoch + 1}
sample_len = captions.size(1) if args.self_critical_loss in [
'mixed', 'mixed_with_face'
] else 20
if sc_activated:
sampled_seq, sampled_log_probs, outputs = model.sample(
images,
init_features,
persist_features,
max_seq_length=sample_len,
start_token_id=vocab('<start>'),
trigram_penalty_alpha=args.trigram_penalty_alpha,
stochastic_sampling=True,
output_logprobs=True,
output_outputs=True)
sampled_seq = model.decoder.alt_prob_to_tensor(
sampled_seq, device=device)
else:
outputs = model(images,
init_features,
captions,
lengths,
persist_features,
teacher_p,
args.teacher_forcing,
sorting_order,
writer_data=writer_data)
if args.share_embedding_weights:
# Weights of (HxH) projection matrix used for regularizing
# models that share embedding weights
projection = model.decoder.projection.weight
loss = criterion(projection, outputs, targets)
elif sc_activated:
# get greedy decoding baseline
model.eval()
with torch.no_grad():
greedy_sampled_seq = model.sample(
images,
init_features,
persist_features,
max_seq_length=sample_len,
start_token_id=vocab('<start>'),
trigram_penalty_alpha=args.trigram_penalty_alpha,
stochastic_sampling=False)
greedy_sampled_seq = model.decoder.alt_prob_to_tensor(
greedy_sampled_seq, device=device)
model.train()
if args.self_critical_loss in [
'sc', 'sc_with_diversity',
'sc_with_relative_diversity',
'sc_with_bleu_diversity', 'sc_with_repetition'
]:
loss, advantage = criterion(
sampled_seq,
sampled_log_probs,
greedy_sampled_seq, [gts_sc[i] for i in image_ids],
scorers,
vocab,
return_advantage=True)
elif args.self_critical_loss in ['mixed']:
loss, advantage = criterion(
sampled_seq,
sampled_log_probs,
outputs,
greedy_sampled_seq, [gts_sc[i] for i in image_ids],
scorers,
vocab,
targets,
lengths,
gamma_ml_rl=args.gamma_ml_rl,
return_advantage=True)
elif args.self_critical_loss in ['mixed_with_face']:
loss, advantage = criterion(
sampled_seq,
sampled_log_probs,
outputs,
greedy_sampled_seq, [gts_sc[i] for i in image_ids],
scorers,
vocab,
captions,
targets,
lengths,
gamma_ml_rl=args.gamma_ml_rl,
return_advantage=True)
else:
raise ValueError('Invalid self-critical loss')
if writer is not None and i % 100 == 0:
writer.add_scalar('training_loss', loss.item(),
epoch * len(data_loader) + i)
writer.add_scalar('advantage', advantage,
epoch * len(data_loader) + i)
writer.add_scalar('lr',
optimizer.param_groups[0]['lr'],
epoch * len(data_loader) + i)
else:
loss = criterion(outputs, targets)
model.zero_grad()
loss.backward()
# Clip gradients if desired:
if args.grad_clip is not None:
# grad_norms = [x.grad.data.norm(2) for x in opt_params]
# batch_max_grad = np.max(grad_norms)
# if batch_max_grad > 10.0:
# print('WARNING: gradient norms larger than 10.0')
# torch.nn.utils.clip_grad_norm_(decoder.parameters(), 0.1)
# torch.nn.utils.clip_grad_norm_(encoder.parameters(), 0.1)
clip_gradients(optimizer, args.grad_clip)
# Update weights:
optimizer.step()
# CyclicalLR requires us to update LR at every minibatch:
if args.lr_scheduler == 'CyclicalLR':
scheduler.step()
total_loss += loss.item()
num_batches += 1
if params.hierarchical_model:
_, loss_sent, _, loss_word = criterion.item_terms()
total_loss_sent += float(loss_sent)
total_loss_word += float(loss_word)
# Print log info
if (i + 1) % args.log_step == 0:
print('Epoch [{}/{}], Step [{}/{}], Loss: {:.4f}, '
'Perplexity: {:5.4f}'.format(epoch + 1,
args.num_epochs, i + 1,
total_step, loss.item(),
np.exp(loss.item())))
sys.stdout.flush()
if params.hierarchical_model:
weight_sent, loss_sent, weight_word, loss_word = criterion.item_terms(
)
print('Sentence Loss: {:.4f}, '
'Word Loss: {:.4f}'.format(
float(loss_sent), float(loss_word)))
sys.stdout.flush()
if i + 1 == args.num_batches:
break
end = datetime.now()
stats['training_loss'] = total_loss / num_batches
if params.hierarchical_model:
stats['loss_sentence'] = total_loss_sent / num_batches
stats['loss_word'] = total_loss_word / num_batches
print('Epoch {} duration: {}, average loss: {:.4f}'.format(
epoch + 1, end - begin, stats['training_loss']))
save_model(args, params, model.encoder, model.decoder, optimizer,
epoch, vocab)
if epoch == 0:
vocab_counts['avg'] = vocab_counts['sum'] / vocab_counts['cnt']
vocab_counts['unk_cnt_per'] = 100 * vocab_counts[
'unk_cnt'] / vocab_counts['cnt']
vocab_counts['unk_sum_per'] = 100 * vocab_counts[
'unk_sum'] / vocab_counts['sum']
# print(vocab_counts)
print((
'Training data contains {sum} words in {cnt} captions (avg. {avg:.1f} w/c)'
+ ' with {unk_sum} <unk>s ({unk_sum_per:.1f}%)' +
' in {unk_cnt} ({unk_cnt_per:.1f}%) captions').format(
**vocab_counts))
############################################
# Validation loss and learning rate update #
############################################
if args.validate is not None and (epoch +
1) % args.validation_step == 0:
val_loss = do_validate(model, valid_loader, criterion, scorers,
vocab, teacher_p, args, params, stats,
epoch, sc_activated, gts_sc_valid)
if args.lr_scheduler == 'ReduceLROnPlateau':
scheduler.step(val_loss)
elif args.lr_scheduler == 'StepLR':
scheduler.step()
all_stats[str(epoch + 1)] = stats
save_stats(args, params, all_stats, writer=writer)
if writer is not None:
# Log model data to tensorboard
log_model_data(params, model, epoch + 1, writer)
if writer is not None:
writer.close()
def main():
parser = argparse.ArgumentParser(
"DINO training CLI",
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
parser.add_argument(
"-m",
"--model",
type=str,
default="vit_tiny",
choices=["vit_tiny", "vit_small", "vit_base"],
)
parser.add_argument("-b", "--batch-size", type=int, default=32)
parser.add_argument("-d", "--device", type=int, default=0)
parser.add_argument("--gpu", action="store_true")
parser.add_argument("-l", "--logging-freq", type=int, default=200)
parser.add_argument("--momentum-teacher", type=int, default=0.9995)
parser.add_argument("-c", "--n-crops", type=int, default=4)
parser.add_argument("-e", "--n-epochs", type=int, default=100)
parser.add_argument("-o", "--out-dim", type=int, default=1024)
parser.add_argument("-t", "--tensorboard-dir", type=str, default="")
parser.add_argument("--optimizer", type=str, default="AdamW")
parser.add_argument("--clip-grad", type=float, default=2.0)
parser.add_argument("--norm-last-layer", action="store_true")
parser.add_argument("--batch-size-eval", type=int, default=64)
parser.add_argument("--teacher-temp", type=float, default=0.04)
parser.add_argument("--student-temp", type=float, default=0.1)
parser.add_argument("--pretrained", action="store_true")
parser.add_argument("-w", "--weight-decay", type=float, default=0.4)
args = parser.parse_args()
print(vars(args))
# Parameters
models = {
"vit_tiny": [vit_tiny, 192],
"vit_small": [vit_small, 384],
"vit_base": [vit_base, 768],
}
path_dataset_train = pathlib.Path("data/imagenette2-320/train")
path_dataset_val = pathlib.Path("data/imagenette2-320/val")
path_labels = pathlib.Path("data/imagenette_labels.json")
if args.gpu:
torch.cuda.empty_cache()
torch.cuda.set_device(args.device)
device = torch.cuda.current_device()
print(f"Current CUDA device: {device}")
else:
device = torch.device("cpu")
print(f"Current device: {device}")
n_workers = 4
##################
# Data preparation
##################
with path_labels.open("r") as f:
label_mapping = json.load(f)
transform_aug = DataAugmentation(size=224, n_local_crops=args.n_crops - 2)
transform_plain = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize((0.485, 0.456, 0.406), (0.229, 0.224, 0.225)),
transforms.Resize((224, 224)),
])
dataset_train_aug = ImageFolder(path_dataset_train,
transform=transform_aug)
dataset_train_plain = ImageFolder(path_dataset_train,
transform=transform_plain)
dataset_val_plain = ImageFolder(path_dataset_val,
transform=transform_plain)
if dataset_train_plain.classes != dataset_val_plain.classes:
raise ValueError("Inconsistent classes")
train_dataloader_aug = DataLoader(
dataset_train_aug,
batch_size=args.batch_size,
shuffle=True,
drop_last=True,
num_workers=n_workers,
pin_memory=True,
)
train_dataloader_plain = DataLoader(
dataset_train_plain,
batch_size=args.batch_size_eval,
drop_last=False,
num_workers=n_workers,
)
val_dataloader_plain = DataLoader(
dataset_val_plain,
batch_size=args.batch_size_eval,
drop_last=False,
num_workers=n_workers,
)
val_dataloader_plain_subset = DataLoader(
dataset_val_plain,
batch_size=args.batch_size_eval,
drop_last=False,
sampler=SubsetRandomSampler(list(range(0, len(dataset_val_plain),
50))),
num_workers=n_workers,
)
print(f"[INFO] Data loaded")
#########
# Logging
#########
run = neptune.init(project="beomus/dino-test")
run["config/parameters"] = json.dumps(vars(args))
writer = SummaryWriter(log_dir=args.tensorboard_dir)
writer.add_text("arguments", json.dumps(vars(args)))
logging_path = pathlib.Path(writer.log_dir)
wandb.init(project="dino", entity="beomus")
wandb.config.update(args)
print(f"[INFO] Logging started")
#######################
# Models initialization
#######################
model_fn, dim = models[args.model]
student_vit = model_fn()
teacher_vit = model_fn()
student = MultiCropWrapper(
student_vit,
MlpHead(in_dim=dim,
out_dim=args.out_dim,
norm_last_layer=args.norm_last_layer),
)
teacher = MultiCropWrapper(teacher_vit, MlpHead(dim, args.out_dim))
student, teacher = student.to(device), teacher.to(device)
teacher.load_state_dict(student.state_dict())
for p in teacher.parameters():
p.requires_grad = False
print(f"[INFO]: Model initialized")
######
# Loss
######
loss_inst = Loss(
out_dim=args.out_dim,
teacher_temp=args.teacher_temp,
student_temp=args.student_temp,
).to(device)
lr = 0.0005 * args.batch_size / 256
optimizer_kwargs = {
"params": student.parameters(),
"lr": lr,
"weight_decay": args.weight_decay,
"amsgrad": True,
}
if args.optimizer == "SGD":
optimizer_kwargs["momentum"] = 0.9
optimizer_kwargs.pop("amsgrad")
optimizer = getattr(torch.optim, args.optimizer)(**optimizer_kwargs)
# optimizer = torch.optim.AdamW(
# student.parameters(), lr=lr, weight_decay=args.weight_decay
# )
model_name = f"{type(student).__name__}"
with open(f"{logging_path / model_name}_arch.txt", "w") as f:
f.write(str(student))
run[f"config/model/{model_name}_arch"].upload(
f"{logging_path / model_name}_arch.txt")
optimizer_name = f"{type(optimizer).__name__}"
with open(f"{logging_path / optimizer_name}.txt", "w") as f:
f.write(str(optimizer))
run[f"config/{optimizer_name}"].upload(
f"{logging_path / optimizer_name}.txt")
###############
# Training loop
###############
n_batches = len(dataset_train_aug) // args.batch_size
n_steps, best_acc = 0, 0
print(f"[INFO]: Training started")
for epoch in range(args.n_epochs):
for i, (images, _) in tqdm.tqdm(enumerate(train_dataloader_aug),
total=n_batches):
if n_steps % args.logging_freq == 0:
student.eval()
# embedding
embs, imgs, labels_ = compute_embedding(
student.backbone, val_dataloader_plain_subset)
writer.add_embedding(
embs,
metadata=[label_mapping[l] for l in labels_],
label_img=imgs,
global_step=n_steps,
tag="embeddings",
)
# KNN
current_acc = compute_knn(student.backbone,
train_dataloader_plain,
val_dataloader_plain)
writer.add_scalar("knn-accuracy", current_acc, n_steps)
run["metrics/acc"].log(current_acc)
wandb.log({"accuracy": current_acc})
if current_acc > best_acc:
model_path = str(logging_path / "model_best.pth")
torch.save(student, model_path)
run["model_checkpoints/my_model"].upload(model_path)
best_acc = current_acc
student.train()
images = [img.to(device) for img in images]
teacher_output = teacher(images[:2])
student_output = student(images)
loss = loss_inst(student_output, teacher_output)
optimizer.zero_grad()
loss.backward()
clip_gradients(student, args.clip_grad)
optimizer.step()
with torch.no_grad():
for student_ps, teacher_ps in zip(student.parameters(),
teacher.parameters()):
teacher_ps.data.mul_(args.momentum_teacher)
teacher_ps.data.add_(
(1 - args.momentum_teacher) * student_ps.detach().data)
writer.add_scalar("train_loss", loss, n_steps)
run["metrics/loss"].log(loss)
wandb.log({"loss": loss})
n_steps += 1
print(f"[INFO]: Training ended")
run.stop()
