def main():
logger.info('Start to declare training variable')
cfg.device = 'cuda' if torch.cuda.is_available() else 'cpu'
logger.info('Session will be ran in device: [%s]' % cfg.device)
start_epoch = 0
best_acc = 0.
logger.info('Start to prepare data')
# get transformers
# train_transform is for data perturbation
train_transform = transforms.get(train=True)
# test_transform is for evaluation
test_transform = transforms.get(train=False)
# reduced_transform is for original training data
reduced_transform = get_reduced_transform(cfg.tfm_resize, cfg.tfm_size,
cfg.tfm_means, cfg.tfm_stds)
# get datasets
# each head should have its own trainset
train_splits = dict(cifar100=[['train', 'test']],
stl10=[['train+unlabeled', 'test'], ['train', 'test']])
test_splits = dict(cifar100=['train', 'test'], stl10=['train', 'test'])
# instance dataset for each head
# otrainset: original trainset
otrainset = [
ConcatDataset([
datasets.get(split=split, transform=reduced_transform)
for split in train_splits[cfg.dataset][hidx]
]) for hidx in xrange(len(train_splits[cfg.dataset]))
]
# ptrainset: perturbed trainset
ptrainset = [
ConcatDataset([
datasets.get(split=split, transform=train_transform)
for split in train_splits[cfg.dataset][hidx]
]) for hidx in xrange(len(train_splits[cfg.dataset]))
]
# testset
testset = ConcatDataset([
datasets.get(split=split, transform=test_transform)
for split in test_splits[cfg.dataset]
])
# declare data loaders for testset only
test_loader = DataLoader(testset,
batch_size=cfg.batch_size,
shuffle=False,
num_workers=cfg.num_workers)
logger.info('Start to build model')
net = networks.get()
criterion = PUILoss(cfg.pica_lamda)
optimizer = optimizers.get(
params=[val for _, val in net.trainable_parameters().iteritems()])
lr_handler = lr_policy.get()
# load session if checkpoint is provided
if cfg.resume:
assert os.path.exists(cfg.resume), "Resume file not found"
ckpt = torch.load(cfg.resume)
logger.info('Start to resume session for file: [%s]' % cfg.resume)
net.load_state_dict(ckpt['net'])
best_acc = ckpt['acc']
start_epoch = ckpt['epoch']
# move modules to target device
net, criterion = net.to(cfg.device), criterion.to(cfg.device)
# tensorboard wrtier
writer = SummaryWriter(cfg.debug, log_dir=cfg.tfb_dir)
# start training
lr = cfg.base_lr
epoch = start_epoch
while lr > 0 and epoch < cfg.max_epochs:
lr = lr_handler.update(epoch, optimizer)
writer.add_scalar('Train/Learing_Rate', lr, epoch)
logger.info('Start to train at %d epoch with learning rate %.5f' %
(epoch, lr))
train(epoch, net, otrainset, ptrainset, optimizer, criterion, writer)
logger.info('Start to evaluate after %d epoch of training' % epoch)
acc, nmi, ari = evaluate(net, test_loader)
logger.info('Evaluation results at epoch %d are: '
'ACC: %.3f, NMI: %.3f, ARI: %.3f' % (epoch, acc, nmi, ari))
writer.add_scalar('Evaluate/ACC', acc, epoch)
writer.add_scalar('Evaluate/NMI', nmi, epoch)
writer.add_scalar('Evaluate/ARI', ari, epoch)
epoch += 1
if cfg.debug:
continue
# save checkpoint
is_best = acc > best_acc
best_acc = max(best_acc, acc)
save_checkpoint(
{
'net': net.state_dict(),
'optimizer': optimizer.state_dict(),
'acc': acc,
'epoch': epoch
},
is_best=is_best)
logger.info('Done')
def train_head(epoch, net, hidx, head, otrainset, ptrainset, optimizer,
criterion, writer):
"""trains one head for an epoch
"""
# declare dataloader
random_sampler = RandomSampler(otrainset)
batch_sampler = RepeatSampler(random_sampler,
cfg.batch_size,
nrepeat=cfg.data_nrepeat)
ploader = DataLoader(ptrainset,
batch_sampler=batch_sampler,
num_workers=cfg.num_workers,
pin_memory=True)
oloader = DataLoader(otrainset,
sampler=random_sampler,
batch_size=cfg.batch_size,
num_workers=cfg.num_workers,
pin_memory=True)
# set network mode
net.train()
# tracking variable
end = time.time()
train_loss = AverageMeter('Loss', ':.4f')
data_time = AverageMeter('Data', ':.3f')
batch_time = AverageMeter('Time', ':.3f')
progress = TimeProgressMeter(batch_time,
data_time,
train_loss,
Batch=len(oloader),
Head=len(cfg.net_heads),
Epoch=cfg.max_epochs)
for batch_idx, (obatch,
pbatch) in enumerate(itertools.izip(oloader, ploader)):
# record data loading time
data_time.update(time.time() - end)
# move data to target device
(oinputs, _), (pinputs, _) = (obatch, pbatch)
oinputs, pinputs = (oinputs.to(cfg.device, non_blocking=True),
pinputs.to(cfg.device, non_blocking=True))
# forward
ologits, plogits = net(oinputs)[hidx], net(pinputs)[hidx]
loss = criterion(ologits.repeat(cfg.data_nrepeat, 1), plogits)
# backward
optimizer.zero_grad()
loss.backward()
optimizer.step()
train_loss.update(loss.item(), oinputs.size(0))
batch_time.update(time.time() - end)
end = time.time()
writer.add_scalar('Train/Loss/Head-%d' % head, train_loss.val,
epoch * len(oloader) + batch_idx)
if batch_idx % cfg.display_freq != 0:
continue
logger.info(progress.show(Batch=batch_idx, Epoch=epoch, Head=hidx))
def evaluate(net, loader, writer, epoch):
"""evaluates on provided data
"""
net.eval()
predicts = np.zeros(len(loader.dataset), dtype=np.int32)
labels = np.zeros(len(loader.dataset), dtype=np.int32)
intermediates = np.zeros((len(loader.dataset), 2048), dtype=np.float32)
images = np.zeros((len(loader.dataset), 3, 64, 64), dtype=np.float32)
print(f"Evaluating on {len(loader.dataset)} samples")
with torch.no_grad():
for batch_idx, (batch, targets) in enumerate(loader):
# logger.progress('processing %d/%d batch' % (batch_idx, len(loader)))
batch = batch.to(cfg.device, non_blocking=True)
# assuming the last head is the main one
# output dimension of the last head
# should be consistent with the ground-truth
logits = net(batch, -1)
start = batch_idx * loader.batch_size
end = start + loader.batch_size
end = min(end, len(loader.dataset))
labels[start:end] = targets.cpu().numpy()
predicts[start:end] = logits.max(1)[1].cpu().numpy()
if epoch % cfg.embedding_freq == 0:
intermediates[start:end] = net(batch, -1, True).cpu().numpy()
if not cfg.tfm_adaptive_thresholding:
for i in range(3):
batch[:, i] = (batch[:, i] *
cfg.tfm_stds[i]) + cfg.tfm_means[i]
images[start:end] = torch.nn.functional.interpolate(
batch, size=(64, 64), mode='bicubic',
align_corners=False).cpu().numpy()
# TODO: Gather labels and predicts
# compute accuracy
num_classes = labels.max().item() + 1
count_matrix = np.zeros((num_classes, num_classes), dtype=np.int32)
for i in range(predicts.shape[0]):
count_matrix[predicts[i], labels[i]] += 1
reassignment = np.dstack(
linear_sum_assignment(count_matrix.max() - count_matrix))[0]
acc = count_matrix[reassignment[:, 0], reassignment[:, 1]].sum().astype(
np.float32) / predicts.shape[0]
nmi = NMI(labels, predicts)
ari = ARI(labels, predicts)
# compute f1 scores per class
predicts_reassigned = reassignment[predicts, 1]
precision = precision_score(labels,
predicts_reassigned,
average=None,
zero_division=0)
recall = recall_score(labels,
predicts_reassigned,
average=None,
zero_division=0)
f1 = f1_score(labels, predicts_reassigned, average=None, zero_division=0)
logger.info('Evaluation results at epoch %d are: '
'ACC: %.3f, NMI: %.3f, ARI: %.3f' % (epoch, acc, nmi, ari))
if cfg.local_rank == 0:
writer.add_scalar('Evaluate/ACC', acc, epoch)
writer.add_scalar('Evaluate/NMI', nmi, epoch)
writer.add_scalar('Evaluate/ARI', ari, epoch)
for i in range(len(f1)):
writer.add_scalar(f'Evaluate/f1_{i}', f1[i], epoch)
writer.add_scalar(f'Evaluate/precision_{i}', precision[i], epoch)
writer.add_scalar(f'Evaluate/recall_{i}', recall[i], epoch)
if epoch % cfg.embedding_freq == 0 and cfg.embedding_freq != -1:
writer.add_embedding(intermediates, labels, images, epoch,
cfg.session)
return acc
def main():
torch.autograd.set_detect_anomaly(True)
logger.info('Start to declare training variable')
if torch.cuda.is_available():
cfg.device = torch.device("cuda")
torch.cuda.set_device(cfg.local_rank)
else:
cfg.device = torch.device("cpu")
logger.info('Session will be ran in device: [%s]' % cfg.device)
start_epoch = 0
best_acc = 0.
logger.info('Start to prepare data')
# get transformers
# train_transform is for data perturbation
train_transform = transforms.get(train=True)
# test_transform is for evaluation
test_transform = transforms.get(train=False)
# reduced_transform is for original training data
reduced_transform = get_reduced_transform(cfg.tfm_resize, cfg.tfm_size,
cfg.tfm_blur, cfg.tfm_means,
cfg.tfm_stds,
cfg.tfm_adaptive_thresholding)
# get datasets
# each head should have its own trainset
train_splits = dict(cifar100=[['train', 'test']],
image_folder_wrapper=[['train']],
stl10=[['train+unlabeled', 'test'], ['train', 'test']])
test_splits = dict(cifar100=['train', 'test'],
image_folder_wrapper=['test'],
stl10=['train', 'test'])
# instance dataset for each head
# otrainset: original trainset
otrainset = [
ConcatDataset([
datasets.get(split=split, transform=reduced_transform)
for split in train_splits[cfg.dataset][hidx]
]) for hidx in range(len(train_splits[cfg.dataset]))
]
# ptrainset: perturbed trainset
ptrainset = [
ConcatDataset([
datasets.get(split=split, transform=train_transform)
for split in train_splits[cfg.dataset][hidx]
]) for hidx in range(len(train_splits[cfg.dataset]))
]
# testset
testset = ConcatDataset([
datasets.get(split=split, transform=test_transform)
for split in test_splits[cfg.dataset]
])
# declare data loaders for testset only
test_loader = DataLoader(testset,
batch_size=cfg.batch_size,
shuffle=False,
num_workers=cfg.num_workers)
logger.info('Start to build model')
net = networks.get()
criterion = PUILoss(cfg.pica_lamda, cfg.pica_target, cfg.pica_iic)
optimizer = optimizers.get(
params=[val for _, val in net.trainable_parameters().items()])
lr_handler = lr_policy.get()
# load session if checkpoint is provided
if cfg.resume:
assert os.path.exists(cfg.resume), "Resume file not found"
ckpt = torch.load(cfg.resume)
logger.info('Start to resume session for file: [%s]' % cfg.resume)
net.load_state_dict(ckpt['net'])
best_acc = ckpt['acc']
start_epoch = ckpt['epoch']
# move modules to target device
if int(os.environ["WORLD_SIZE"]) > 1:
dist.init_process_group(backend="nccl", init_method="env://")
print("world size: {}".format(os.environ["WORLD_SIZE"]))
print("rank: {}".format(cfg.local_rank))
synchronize()
criterion = criterion.to(cfg.device)
net = net.to(cfg.device)
if int(os.environ["WORLD_SIZE"]) > 1:
net = torch.nn.SyncBatchNorm.convert_sync_batchnorm(net)
net = torch.nn.parallel.DistributedDataParallel(
net,
device_ids=[cfg.local_rank],
find_unused_parameters=True,
output_device=cfg.local_rank).cuda()
# Only rank 0 needs a SummaryWriter
if cfg.local_rank == 0:
# tensorboard writer
writer = SummaryWriter(cfg.debug, log_dir=cfg.tfb_dir)
else:
writer = None
# start training
lr = cfg.base_lr
epoch = start_epoch
logger.info('Start to evaluate after %d epoch of training' % epoch)
acc = evaluate(net, test_loader, writer, epoch)
if not cfg.debug and cfg.local_rank == 0:
# save checkpoint
is_best = acc > best_acc
best_acc = max(best_acc, acc)
save_checkpoint(
{
'net': net.state_dict(),
'optimizer': optimizer.state_dict(),
'acc': acc,
'epoch': epoch
},
is_best=is_best)
while lr > 0 and epoch < cfg.max_epochs:
lr = lr_handler.update(epoch, optimizer)
logger.info('Start to train at %d epoch with learning rate %.5f' %
(epoch, lr))
train(epoch, net, otrainset, ptrainset, optimizer, criterion, writer)
epoch += 1
logger.info('Start to evaluate after %d epoch of training' % epoch)
acc = evaluate(net, test_loader, writer, epoch)
if not cfg.debug and cfg.local_rank == 0:
writer.add_scalar('Train/Learing_Rate', lr, epoch)
# save checkpoint
is_best = acc > best_acc
best_acc = max(best_acc, acc)
save_checkpoint(
{
'net': net.state_dict(),
'optimizer': optimizer.state_dict(),
'acc': acc,
'epoch': epoch
},
is_best=is_best)
logger.info('Done')
def main():
logger.info('Start to declare training variable')
cfg.device = 'cuda' if torch.cuda.is_available() else 'cpu'
logger.info('Session will be ran in device: [%s]' % cfg.device)
start_epoch = 0
best_acc = 0.
if cfg.pica:
logger.info('Work at PICA !!!!')
logger.info('Start to prepare data')
# get transformers
# train_transform is for data perturbation
#train_transform = transforms.get(train=True)
# test_transform is for evaluation
test_transform = transforms.get(train=False)
# reduced_transform is for original training data
#reduced_transform = get_reduced_transform(cfg.tfm_resize, cfg.tfm_size,
# cfg.tfm_means, cfg.tfm_stds)
# get datasets
# each head should have its own trainset
#train_splits = dict(cifar100=[['train', 'test']], cifar10=[['train', 'test']],
# stl10=[['train+unlabeled', 'test'], ['train', 'test']])
test_splits = dict(cifar100=['train', 'test'],
cifar10=['train', 'test'],
stl10=['train', 'test'])
# instance dataset for each head
if cfg.dataset.startswith('stl') or cfg.dataset.startswith('cifar'):
# otrainset: original trainset
# otrainset = [ConcatDataset([datasets.get(split=split, transform=reduced_transform)
# for split in train_splits[cfg.dataset][hidx]])
# for hidx in xrange(len(train_splits[cfg.dataset]))]
# # ptrainset: perturbed trainset
# ptrainset = [ConcatDataset([datasets.get(split=split, transform=train_transform)
# for split in train_splits[cfg.dataset][hidx]])
# for hidx in xrange(len(train_splits[cfg.dataset]))]
# testset
testset = ConcatDataset([
datasets.get(split=split, transform=test_transform)
for split in test_splits[cfg.dataset]
])
else:
# otrainset = [ImageFolder(root = cfg.data_root, transform = reduced_transform) for hidx in xrange(2)]
# ptrainset = [ImageFolder(root = cfg.data_root, transform = train_transform) for hidx in xrange(2)]
testset = ImageFolder(root=cfg.data_root, transform=test_transform)
logger.debug(
'Dataset [%s] from directory [%s] is declared and %d samples '
'are loaded' % (cfg.dataset, cfg.data_root, len(testset)))
# declare data loaders for testset only
test_loader = DataLoader(testset,
batch_size=cfg.batch_size,
shuffle=False,
num_workers=cfg.num_workers)
logger.info('Start to build model')
net = networks.get()
criterion = DCLoss(cfg.dc_lamda)
optimizer = optimizers.get(
params=[val for _, val in net.trainable_parameters().iteritems()])
lr_handler = lr_policy.get()
# load session if checkpoint is provided
if cfg.resume:
assert os.path.exists(cfg.resume), "Resume file not found"
ckpt = torch.load(cfg.resume)
logger.info('Start to resume session for file: [%s]' % cfg.resume)
if not cfg.pica:
net.load_state_dict(ckpt['net'])
best_acc = ckpt['acc']
start_epoch = ckpt['epoch']
else:
net.load_state_dict(ckpt)
best_acc = 0
start_epoch = 0
# data parallel
if cfg.device == 'cuda' and len(cfg.gpus.split(',')) > 1:
logger.info('Data parallel will be used for acceleration purpose')
device_ids = range(len(cfg.gpus.split(',')))
if not (hasattr(net, 'data_parallel')
and net.data_parallel(device_ids)):
net = nn.DataParallel(net, device_ids=device_ids)
cudnn.benchmark = True
else:
logger.info('Data parallel will not be used for acceleration')
# move modules to target device
net, criterion = net.to(cfg.device), criterion.to(cfg.device)
# tensorboard wrtier
writer = SummaryWriter(cfg.debug, log_dir=cfg.tfb_dir)
# start training
lr = cfg.base_lr
epoch = start_epoch
logger.info('Start to evaluate after %d epoch of training' % epoch)
acc, nmi, ari = evaluate(net, test_loader)
logger.info('Evaluation results at epoch %d are: '
'ACC: %.3f, NMI: %.3f, ARI: %.3f' % (epoch, acc, nmi, ari))
writer.add_scalar('Evaluate/ACC', acc, epoch)
writer.add_scalar('Evaluate/NMI', nmi, epoch)
writer.add_scalar('Evaluate/ARI', ari, epoch)
logger.info('Done')