def main():
# spawn theano vars
xs = [T.imatrix('x%d' % i) for i in range(options['max_src'])]
y = T.ivector('y')
learning_rate = T.scalar('learning_rate')
trng = RandomStreams(4321)
# use test values
"""
import numpy as np
batch_size = 10
theano.config.compute_test_value = 'raise'
xl.tag.test_value = np.random.randn(batch_size, 392).astype(floatX)
xr.tag.test_value = np.random.randn(batch_size, 392).astype(floatX)
y.tag.test_value = np.random.randint(8, size=batch_size).astype(np.int32)
learning_rate.tag.test_value = 0.5
"""
# build cgs
model = build_model(xs, y, learning_rate, trng=trng, **options)
# compile
opt = get_optimizer(options['optimizer'])
f_train = opt(learning_rate, model, xs + [y], return_alpha=True)
# compile validation/test functions
f_valid = theano.function(xs + [y], [model.cost, model.acc],
on_unused_input='warn')
# training loop
train(f_train, f_valid, xs, y, **options)
def __init__(self, opt, logger=None):
super(Model, self).__init__()
self.opt = opt
self.logger = logger
# 根据YoloV2和YoloV3使用不同的配置文件
if opt.model == 'Yolo2':
cfgfile = 'configs/yolo2-voc.cfg'
elif opt.model == 'Yolo3':
cfgfile = 'configs/yolo3-coco.cfg'
# 初始化detector
self.detector = Darknet(cfgfile, device=opt.device).to(opt.device)
print_network(self.detector, logger=logger)
# 在--load之前加载weights文件(可选)
if opt.weights:
utils.color_print('Load Yolo weights from %s.' % opt.weights, 3)
self.detector.load_weights(opt.weights)
self.optimizer = get_optimizer(opt, self.detector)
self.scheduler = get_scheduler(opt, self.optimizer)
self.avg_meters = ExponentialMovingAverage(0.95)
self.save_dir = os.path.join(opt.checkpoint_dir, opt.tag)
def soft_train(network, args):
device = torch.device("cuda" if args.gpu_flag is True else "cpu")
optimizer, scheduler = get_optimizer(network, args)
train_data_set = get_data_set(args, train_flag=True)
test_data_set = get_data_set(args, train_flag=False)
train_data_loader = torch.utils.data.DataLoader(train_data_set,
batch_size=args.batch_size,
shuffle=True)
test_data_loader = torch.utils.data.DataLoader(test_data_set,
batch_size=args.batch_size,
shuffle=False)
print("-*-" * 10 + "\n\t\tTrain network\n" + "-*-" * 10)
for epoch in range(0, args.epoch):
network = network.cpu()
if args.network is "vgg":
network = soft_prune_vgg_step(network, args.prune_rate[0])
elif args.network == 'resnet':
network = soft_prune_resnet_step(network, args.prune_rate)
network = network.to(device)
train_step(network, train_data_loader, test_data_loader, optimizer,
device, epoch)
if scheduler is not None:
scheduler.step()
return network
def train(args):
iters, vocab = get_iterator(args)
model = get_model(args, vocab)
loss_fn = get_loss(args, vocab)
optimizer = get_optimizer(args, model)
trainer = get_trainer(args, model, loss_fn, optimizer)
metrics = get_metrics(args, vocab)
evaluator = get_evaluator(args, model, loss_fn, metrics)
logger = get_logger(args)
@trainer.on(Events.STARTED)
def on_training_started(engine):
print("Begin Training")
@trainer.on(Events.ITERATION_COMPLETED)
def log_iter_results(engine):
log_results(logger, 'train/iter', engine.state, engine.state.iteration)
@trainer.on(Events.EPOCH_COMPLETED)
def evaluate_epoch(engine):
log_results(logger, 'train/epoch', engine.state, engine.state.epoch)
state = evaluate_once(evaluator, iterator=iters['val'])
log_results(logger, 'valid/epoch', state, engine.state.epoch)
trainer.run(iters['train'], max_epochs=args.max_epochs)
def get_optimizer(self, optimizer_name, used_look_head=True):
return get_optimizer(optimizer_name,
self.net,
self.args,
Trainer.learn_change_func,
used_look_head=used_look_head)
def main():
"""
Main Function
"""
# Set up the Arguments, Tensorboard Writer, Dataloader, Loss Fn, Optimizer
assert_and_infer_cfg(args)
prep_experiment(args, parser)
writer = None
_, _, _, extra_val_loaders, _ = datasets.setup_loaders(args)
criterion, criterion_val = loss.get_loss(args)
criterion_aux = loss.get_loss_aux(args)
net = network.get_net(args, criterion, criterion_aux)
optim, scheduler = optimizer.get_optimizer(args, net)
net = torch.nn.SyncBatchNorm.convert_sync_batchnorm(net)
net = network.warp_network_in_dataparallel(net, args.local_rank)
epoch = 0
i = 0
if args.snapshot:
epoch, mean_iu = optimizer.load_weights(net, optim, scheduler,
args.snapshot, args.restore_optimizer)
print("#### iteration", i)
torch.cuda.empty_cache()
# Main Loop
# for epoch in range(args.start_epoch, args.max_epoch):
for dataset, val_loader in extra_val_loaders.items():
print("Extra validating... This won't save pth file")
validate(val_loader, dataset, net, criterion_val, optim, scheduler, epoch, writer, i, save_pth=False)
def train_network(network, args):
if network is None:
return
device = torch.device("cuda" if args.gpu_flag is True else "cpu")
network = network.to(device)
optimizer, scheduler = get_optimizer(network, args)
train_data_set = get_data_set(args, train_flag=True)
test_data_set = get_data_set(args, train_flag=False)
train_data_loader = torch.utils.data.DataLoader(train_data_set,
batch_size=args.batch_size,
shuffle=True)
test_data_loader = torch.utils.data.DataLoader(test_data_set,
batch_size=args.batch_size,
shuffle=False)
print("-*-" * 10 + "\n\t\tTrain network\n" + "-*-" * 10)
for epoch in range(0, args.epoch):
if args.pruned and args.alpha < 1:
network = network.cpu()
network = soft_prune_step(network, 1 - args.alpha)
network = network.to(device)
train_step(network, train_data_loader, test_data_loader, optimizer,
device, epoch)
if scheduler is not None:
scheduler.step()
return network
def train_workers(dataset,
workers,
epochs,
training_steps,
cutoff,
optimizer,
test_size=1000):
train_step, init_op, reset_opt = get_optimizer(optimizer)
step = 0
with tf.Session() as sess:
sess.run(init_op)
step_time = Timer()
for pbt_step in range(1, training_steps + 1):
for worker in workers:
step += 1
print('%d, ' % step, end='')
print('%d, ' % worker['id'], end='')
score_value = worker['score_value']
train_epochs(sess, epochs, worker['hparams'][0], dataset,
train_step)
train, test, valid = test_accuracy.test_graph(
sess, test_size, dataset)
print('%f, %f, %f' % (train, test, valid))
worker[
'score_value'] = train * test #overfit_score.overfit_blended(train, test)
worker['score'] = (1.0 + worker['score_value']) / (1.0 +
score_value)
pbt.tournament_replace(worker,
workers,
cutoff,
dup_all=False,
explore_fun=pbt.perturb_hparams)
#pbt.pbt(workers, cutoff, dup_all=False)
print('# step time %3.1fs, ' % step_time.split())
def train(config):
# load Vocab
src_vocab = data_reader.Vocab(vocab_limits=config['src_vocab_size'])
src_vocab.load_metadata(config['metadata']['src'])
config['src_vocab_size'] = src_vocab.vocab_size()
tgt_vocab = data_reader.Vocab(vocab_limits=config['tgt_vocab_size'])
tgt_vocab.load_metadata(config['metadata']['tgt'])
config['tgt_vocab_size'] = tgt_vocab.vocab_size()
tf.logging.info(config)
initializer = tf.random_uniform_initializer(-config['init_scale'],
config['init_scale'])
# create models
with tf.name_scope('Train'):
opt, lr = optimizer.get_optimizer(config['optimizer'],
config['learning_rate'])
with tf.variable_scope("Model", reuse=None, initializer=initializer):
train_model = model.Model(is_training=True,
config=config,
seq_length=config['tgt_length'] - 1,
optimizer=opt,
lr=lr)
with tf.name_scope('Test'):
with tf.variable_scope("Model", reuse=True):
test_model = model.Model(is_training=False,
config=config,
seq_length=1)
sv = tf.train.Supervisor(logdir=config['logdir'])
sess_config = tf.ConfigProto(allow_soft_placement=True,
log_device_placement=True)
sess_config.gpu_options.allow_growth = True
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.9
# load Data
train_data = data_reader.DataReader(
src_data=config['train_data']['src'][0],
tgt_data=config['train_data']['tgt'][0],
src_vocab=src_vocab,
tgt_vocab=tgt_vocab,
src_length=config['src_length'],
tgt_length=config['tgt_length'],
batch_size=config['batch_size'])
tf.logging.info('Start Sess')
with sv.managed_session(config=sess_config) as sess:
for i in range(config['n_epoch']):
lr_decay = config['lr_decay']**max(i + 1 - config['decay_epoch'],
0)
train_model.assign_lr(sess, config['learning_rate'] * lr_decay)
tf.logging.info('Iter %d Start, Learning_rate: %.4f' %
(i, sess.run(train_model.lr)))
loss = run_epoch(sess, train_model, train_data, is_training = True, \
t_model = test_model, src_vocab = src_vocab, tgt_vocab = tgt_vocab)
tf.logging.info('Iter %d: training_loss: %.4f' %
(i, np.power(2, loss)))
def train_network(network, args):
if network is None:
if args.network == 'vgg':
network = MyVGG()
elif args.network == 'resnet':
network = resnet32()
device = torch.device("cuda" if args.gpu_flag is True else "cpu")
network = network.to(device)
optimizer, scheduler = get_optimizer(network, args)
train_data_set = get_data_set(args, train_flag=True)
test_data_set = get_data_set(args, train_flag=False)
train_data_loader = torch.utils.data.DataLoader(train_data_set,
batch_size=args.batch_size,
shuffle=True)
test_data_loader = torch.utils.data.DataLoader(test_data_set,
batch_size=args.batch_size,
shuffle=False)
print("-*-" * 10 + "\n\t\tTrain network\n" + "-*-" * 10)
for epoch in range(0, args.epoch):
train_step(network, train_data_loader, test_data_loader, optimizer,
device, epoch)
if scheduler is not None:
scheduler.step()
return network
def retrain_with_pseudo_label(loaded_models, train_ids, valid_ids, TRAIN_IMAGE_DIR, DATAFRAME, config):
if 'pseudo_dataframe' not in loaded_models[list(loaded_models.keys())[0]]:
return
def worker_init_fn(worker_id):
random.seed(worker_id+random_seed)
np.random.seed(worker_id+random_seed)
for key in loaded_models.keys():
# make dataloader with pseudo label
model_config = loaded_models[key]['config']
dataframe_with_pseudo = pd.concat([DATAFRAME.loc[DATAFRAME['image_id'].isin(train_ids), :], loaded_models[key]['pseudo_dataframe']], axis=0)
retrain_dataset = GWDDataset(dataframe_with_pseudo, TRAIN_IMAGE_DIR, model_config, is_train=True, do_transform=False)
# dataset for retrain
retrain_data_loader = DataLoader(retrain_dataset, batch_size=1, shuffle=True, num_workers=0, worker_init_fn=worker_init_fn, collate_fn=collate_fn)
model = copy.deepcopy(loaded_models[key]['model'])
model.train()
trainable_params = [p for p in model.parameters() if p.requires_grad]
optimizer = get_optimizer(model_config['train']['optimizer'], trainable_params)
# retraining
print("Retraining %s" % key)
for epoch in range(0, config['epochs']):
if model_config['general']['kfold'] < 0:
print("\r[Epoch %d]" % epoch)
train_epoch(model, retrain_data_loader, None, optimizer)
model.eval()
loaded_models[key]['pseudo_model'] = model
return
def train(args):
args, model, iters, vocab, ckpt_available = get_model_ckpt(args)
if ckpt_available:
print("loaded checkpoint {}".format(args.ckpt_name))
loss_fn = get_loss(args, vocab)
optimizer = get_optimizer(args, model)
trainer = get_trainer(args, model, loss_fn, optimizer)
metrics = get_metrics(args, vocab)
evaluator = get_evaluator(args, model, loss_fn, metrics)
logger = get_logger(args)
@trainer.on(Events.STARTED)
def on_training_started(engine):
print("Begin Training")
@trainer.on(Events.ITERATION_COMPLETED)
def log_iter_results(engine):
log_results(logger, 'train/iter', engine.state, engine.state.iteration)
@trainer.on(Events.EPOCH_COMPLETED)
def evaluate_epoch(engine):
log_results(logger, 'train/epoch', engine.state, engine.state.epoch)
state = evaluate_once(evaluator, iterator=iters['val'])
log_results(logger, 'valid/epoch', state, engine.state.epoch)
save_ckpt(args, engine.state.epoch, engine.state.metrics['loss'], model, vocab)
trainer.run(iters['train'], max_epochs=args.max_epochs)
def __init__(self, opt):
super(Model, self).__init__()
self.opt = opt
self.classifier = Classifier(opt.model) #.cuda(device=opt.device)
#####################
# Init weights
#####################
# self.classifier.apply(weights_init)
print_network(self.classifier)
self.optimizer = get_optimizer(opt, self.classifier)
self.scheduler = get_scheduler(opt, self.optimizer)
# load networks
# if opt.load:
# pretrained_path = opt.load
# self.load_network(self.classifier, 'G', opt.which_epoch, pretrained_path)
# if self.training:
# self.load_network(self.discriminitor, 'D', opt.which_epoch, pretrained_path)
self.avg_meters = ExponentialMovingAverage(0.95)
self.save_dir = os.path.join(opt.checkpoint_dir, opt.tag)
# with open('datasets/class_weight.pkl', 'rb') as f:
# class_weight = pickle.load(f, encoding='bytes')
# class_weight = np.array(class_weight, dtype=np.float32)
# class_weight = torch.from_numpy(class_weight).to(opt.device)
# if opt.class_weight:
# self.criterionCE = nn.CrossEntropyLoss(weight=class_weight)
# else:
self.criterionCE = nn.CrossEntropyLoss()
def __init__(self, config):
self.cuda = int(config['cuda'])
#torch.cuda.empty_cache()
self.train_dataloader = get_dataloader(config, scope='train')
self.val_dataloader = get_dataloader(config, scope='val')
self.model = get_model(config)
try:
model_weights = 'experiment/' + config['dir'] + '/' + config[
'weights']
self.model.load_state_dict(torch.load(model_weights)['model'])
print('Weigths loaded')
except:
print('Weights randomized')
self.optimizer = get_optimizer(config, self.model)
self.total_epochs = config['epochs']
self.batches_per_epoch = config['batches_per_epoch']
self.val_batches_per_epoch = config['val_batches_per_epoch']
self.final_weights_file = 'experiment/' + config[
'dir'] + '/weights_last.pth'
self.best_weights_file = 'experiment/' + config[
'dir'] + '/weights_best.pth'
self.log_file = 'experiment/' + config['dir'] + '/logs.csv'
self.loss_dict = {
'sample_name': config['sample_name'],
'output_name': config['output_name'],
'loss': [get_criterion(x) for x in config['loss_criterion']],
'weight': config['loss_weight']
}
self.train_fe = bool(config['train_feature_extractor'])
def main():
'''
Main Function
'''
#Set up the Arguments, Tensorboard Writer, Dataloader, Loss Fn, Optimizer
assert_and_infer_cfg(args)
writer = prep_experiment(args, parser)
train_loader, val_loader, train_obj = datasets.setup_loaders(args)
criterion, criterion_val = loss.get_loss(args)
net = network.get_net(args, criterion)
optim, scheduler = optimizer.get_optimizer(args, net)
torch.cuda.empty_cache()
if args.evaluate:
# Early evaluation for benchmarking
validate(val_loader, net, criterion_val, optim, epoch, writer)
evaluate(val_loader, net)
return
#Main Loop
for epoch in range(args.start_epoch, args.max_epoch):
# Update EPOCH CTR
cfg.immutable(False)
cfg.EPOCH = epoch
cfg.immutable(True)
scheduler.step()
train(train_loader, net, criterion, optim, epoch, writer)
validate(val_loader, net, criterion_val, optim, epoch, writer)
def __init__(self, opt, logger=None):
super(Model, self).__init__(config, kwargs)
self.opt = opt
# cfgfile = 'yolo-voc.cfg'
# self.detector = torchvision.models.detection.fasterrcnn_resnet50_fpn(pretrained=True)
# in_features = self.detector.roi_heads.box_predictor.cls_score.in_features
#
# # replace the pre-trained head with a new one
# self.detector.roi_heads.box_predictor = FastRCNNPredictor(in_features, config.DATA.NUM_CLASSESS + 1)
self.detector = yolov4(inference=True,
n_classes=config.DATA.NUM_CLASSESS)
# """
# 预训练模型
# """
# pretrained_dict = torch.load('pretrained/yolov4.pth')
# self.detector.load_state_dict(pretrained_dict)
self.yolov4loss = Yolo_loss(device=opt.device, batch=opt.batch_size)
#####################
# Init weights
#####################
# normal_init(self.detector)
if opt.debug:
print_network(self.detector)
self.optimizer = get_optimizer(opt, self.detector)
self.scheduler = get_scheduler(opt, self.optimizer)
self.avg_meters = ExponentialMovingAverage(0.95)
self.save_dir = os.path.join('checkpoints', opt.tag)
def __init__(self,
log_dir: str,
cfg: EasyDict,
use_cuda: bool = True,
use_multi_gpu: bool = True,
load_ckpt: str = "",
is_train=True):
self.use_multi_gpu = use_multi_gpu
self.use_cuda = use_cuda
self.cfg = cfg
self.log_dir = Path(log_dir)
self.timer_start_train = 0
self.det_best_field_current = 0
self.det_best_field_best = 0
self.best_epoch = 0
# logger / metrics
self.metrics_fh = None
if is_train:
os.makedirs(self.log_dir, exist_ok=True)
metrics_file = self.log_dir / "train_metrics.csv"
metric_keys = utils.get_csv_header_keys(
cfg.training.compute_clip_retrieval)
self.metrics_fh = metrics_file.open("wt", encoding="utf8")
self.metrics_writer = csv.DictWriter(self.metrics_fh, metric_keys)
self.metrics_writer.writeheader()
self.metrics_fh.flush()
utils.dump_config(cfg, self.log_dir / "config.yaml")
self.logger = utils.get_logger(self.log_dir,
"trainer",
log_file=is_train)
# model
self.model = CootModel(cfg, use_cuda, use_multi_gpu)
# contrastive loss
self.loss_f_contr = ContrastiveLoss(use_cuda)
# cycle consistency loss
self.loss_f_cyclecons = None
if cfg.training.loss_cycle_cons != 0:
self.loss_f_cyclecons = CycleConsistencyLoss(num_samples=1,
use_cuda=use_cuda)
# optimizer
self.optimizer = get_optimizer(cfg.optimizer, self.model.get_params())
# scheduler
self.lr_scheduler = ReduceLROnPlateauWarmup(
self.optimizer,
cfg.scheduler.warmup,
mode="max",
patience=cfg.scheduler.patience,
cooldown=cfg.scheduler.cooldown)
if load_ckpt != "":
self.logger.info(f"Load checkpoint {load_ckpt}")
self.model.load_checkpoint(load_ckpt)
def __init__(self, opt, logger=None):
super(Model, self).__init__()
self.opt = opt
self.logger = logger
kargs = {}
if opt.scale:
min_size = opt.scale
max_size = int(min_size / 3 * 4)
kargs = {
'min_size': min_size,
'max_size': max_size,
}
kargs.update({'box_nms_thresh': nms_thresh})
# 定义backbone和Faster RCNN模型
if opt.backbone is None or opt.backbone.lower() in [
'res50', 'resnet50'
]:
# 默认是带fpn的resnet50
self.detector = fasterrcnn_resnet50_fpn(pretrained=False, **kargs)
in_features = self.detector.roi_heads.box_predictor.cls_score.in_features
# replace the pre-trained head with a new one
self.detector.roi_heads.box_predictor = FastRCNNPredictor(
in_features, opt.num_classes + 1)
elif opt.backbone.lower() in ['vgg16', 'vgg']:
backbone = vgg16_backbone()
self.detector = FasterRCNN(backbone,
num_classes=opt.num_classes + 1,
**kargs)
elif opt.backbone.lower() in ['res101', 'resnet101']:
# 不带FPN的resnet101
backbone = res101_backbone()
self.detector = FasterRCNN(backbone,
num_classes=opt.num_classes + 1,
**kargs)
elif opt.backbone.lower() in ['res', 'resnet']:
raise RuntimeError(
f'backbone "{opt.backbone}" is ambiguous, please specify layers.'
)
else:
raise NotImplementedError(f'no such backbone: {opt.backbone}')
print_network(self.detector)
self.optimizer = get_optimizer(opt, self.detector)
self.scheduler = get_scheduler(opt, self.optimizer)
self.avg_meters = ExponentialMovingAverage(0.95)
self.save_dir = os.path.join(opt.checkpoint_dir, opt.tag)
def __init__(self, opt):
super(Model, self).__init__()
self.opt = opt
self.classifier = Classifier(opt.model)
# self.classifier.apply(weights_init) # 初始化权重
print_network(self.classifier)
self.optimizer = get_optimizer(opt, self.classifier)
self.scheduler = get_scheduler(opt, self.optimizer)
def train(args):
args, model, iters, vocab, ckpt_available = get_model_ckpt(args)
if ckpt_available:
print("loaded checkpoint {}".format(args.ckpt_name))
loss_fn = get_loss(args, vocab)
optimizer = get_optimizer(args, model)
pretrainer = get_pretrainer(args, model, loss_fn, optimizer)
trainer = get_trainer(args, model, loss_fn, optimizer)
metrics = get_metrics(args, vocab)
evaluator = get_evaluator(args, model, loss_fn, metrics)
logger = get_logger(args)
@pretrainer.on(Events.STARTED)
def on_training_started(engine):
print("Begin Pretraining")
@pretrainer.on(Events.ITERATION_COMPLETED)
def log_iter_results(engine):
log_results(logger, 'pretrain/iter', engine.state, engine.state.iteration)
@pretrainer.on(Events.EPOCH_COMPLETED)
def evaluate_epoch(engine):
log_results(logger, 'pretrain/epoch', engine.state, engine.state.epoch)
"""
@pretrainer.on(Events.COMPLETED)
def unfreeze_language_model(engine):
for param in model.module.language_model.base_model.parameters():
param.requires_grad = True
"""
@trainer.on(Events.STARTED)
def on_training_started(engine):
print("Begin Training")
@trainer.on(Events.ITERATION_COMPLETED)
def log_iter_results(engine):
log_results(logger, 'train/iter', engine.state, engine.state.iteration)
@trainer.on(Events.EPOCH_COMPLETED)
def evaluate_epoch(engine):
log_results(logger, 'train/epoch', engine.state, engine.state.epoch)
state = evaluate_once(evaluator, iterator=iters['val'])
log_results(logger, 'valid/epoch', state, engine.state.epoch)
log_results_cmd('valid/epoch', state, engine.state.epoch)
save_ckpt(args, engine.state.epoch, engine.state.metrics['loss'], model, vocab)
evaluate_by_logic_level(args, model, iterator=iters['val'])
if args.pretrain_epochs > 0:
pretrainer.run(iters['pretrain'], max_epochs=args.pretrain_epochs)
trainer.run(iters['train'], max_epochs=args.max_epochs)
def input_stream():
model = TinyYolo()
train_loader, test_loader, val_loader = getdatasets('./data/', batch_size=16)
for i, train_data in enumerate(train_loader):
opt = get_optimizer(model, [0.00001])
out,train_map = train(model, train_data, opt=opt, iou_thresh=0.1 )
print( out)
print(train_map)
print()
print()
def train(config):
# load Vocab
vocab = data_reader.Vocab(vocab_limits=config['vocab_size'])
vocab.load_metadata(config['metadata'])
config['vocab_size'] = vocab.vocab_size()
tf.logging.info(config)
initializer = tf.random_uniform_initializer(-config['init_scale'],
config['init_scale'])
# create models
with tf.name_scope('Train'):
opt, lr = optimizer.get_optimizer("sgd", config['learning_rate'])
with tf.variable_scope("Model", reuse=None, initializer=initializer):
train_model = model.Model(is_training = True, \
config = config, \
optimizer = opt,
lr = lr)
with tf.name_scope('Generate'):
generate_config = copy.deepcopy(config)
generate_config['batch_size'] = 1
generate_config['seq_length'] = 1
with tf.variable_scope("Model", reuse=True, initializer=initializer):
gen_model = model.Model(is_training=False, config=generate_config)
sv = tf.train.Supervisor(logdir=config['logdir'])
sess_config = tf.ConfigProto(allow_soft_placement=True,
log_device_placement=False)
sess_config.gpu_options.allow_growth = True
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.5
tf.logging.info('Start Sess')
with sv.managed_session(config=sess_config) as sess:
for i in range(config['n_epoch']):
lr_decay = config['lr_decay']**max(i + 1 - config['decay_epoch'],
0)
train_model.assign_lr(sess, config['learning_rate'] * lr_decay)
tf.logging.info('Iter %d Start, Learning_rate: %.4f' %
(i, sess.run(train_model.lr)))
costs, speed = run_epoch(sess,
train_model,
datapath=config['train_data'][0],
config=config,
is_training=True,
gen_model=gen_model,
vocab=vocab)
tf.logging.info(
'Iter %d: training_loss:%.4f, speed %.4f words/sec' %
(i, np.exp(costs), speed))
def main():
"""
Main Function
"""
# Set up the Arguments, Tensorboard Writer, Dataloader, Loss Fn, Optimizer
assert_and_infer_cfg(args)
writer = prep_experiment(args, parser)
train_loader, val_loader, train_obj = datasets.setup_loaders(args)
criterion, criterion_val = loss.get_loss(args)
net = network.get_net(args, criterion)
optim, scheduler = optimizer.get_optimizer(args, net)
if args.fix_bn:
net.apply(set_bn_eval)
print("Fix bn for finetuning")
if args.fp16:
net, optim = amp.initialize(net, optim, opt_level="O1")
net = network.wrap_network_in_dataparallel(net, args.apex)
if args.snapshot:
optimizer.load_weights(net, optim,
args.snapshot, args.restore_optimizer)
if args.evaluateF:
assert args.snapshot is not None, "must load weights for evaluation"
evaluate(val_loader, net, args)
return
torch.cuda.empty_cache()
# Main Loop
for epoch in range(args.start_epoch, args.max_epoch):
# Update EPOCH CTR
cfg.immutable(False)
cfg.EPOCH = epoch
cfg.immutable(True)
scheduler.step()
train(train_loader, net, optim, epoch, writer)
if args.apex:
train_loader.sampler.set_epoch(epoch + 1)
validate(val_loader, net, criterion_val,
optim, epoch, writer)
if args.class_uniform_pct:
if epoch >= args.max_cu_epoch:
train_obj.build_epoch(cut=True)
if args.apex:
train_loader.sampler.set_num_samples()
else:
train_obj.build_epoch()
def _initialize(self, batch_steps_per_epoch, output_path):
self.cost = get_cost(self.net.logits, self.tgt, self.cost_kwargs)
self.optimizer, self.ema, self.learning_rate_node = get_optimizer(
self.cost, self.global_step, batch_steps_per_epoch,
self.opt_kwargs)
init = tf.global_variables_initializer()
if not output_path is None:
output_path = os.path.abspath(output_path)
if not os.path.exists(output_path):
print("Allocating '{:}'".format(output_path))
os.makedirs(output_path)
return init
def train_new_model(model, train_queue, valid_queue, test_queue):
ori_model = model.module if args.distributed else model
optimizer = get_optimizer(model, args)
scheduler = get_scheduler(optimizer, args)
drop_layers = ori_model.drop_layers()
criterion = get_criterion(args.classes, args.label_smoothing)
for epoch in range(args.epochs):
scheduler.step()
if args.warmup and epoch < args.warmup_epochs:
lr = args.learning_rate * epoch / args.warmup_epochs + args.warmup_lr
for param_group in optimizer.param_groups:
param_group['lr'] = lr
cond_logging('epoch %d lr %e', epoch, lr)
else:
lr = scheduler.get_lr()[0]
cond_logging('epoch %d lr %e', epoch, lr)
if args.distributed:
train_queue.sampler.set_epoch(epoch)
if args.epd:
drop_rate = args.drop_rate * epoch / args.epochs
else:
drop_rate = args.drop_rate
drop_rates = [drop_rate] * drop_layers
if args.layerd:
for i in range(drop_layers):
drop_rates[i] = drop_rates[i] * (i + 1) / drop_layers
ori_model.set_drop_rates(drop_rates)
cond_logging('drop rates:')
cond_logging(ori_model.drop_rates)
#training
train_acc, train_obj = train(train_queue, model, criterion, optimizer,
lr, args.report_freq, args.world_size,
args.distributed, args.local_rank)
cond_logging('train acc %f', train_acc)
#validation
drop_rates = [0] * drop_layers
ori_model.set_drop_rates(drop_rates)
valid_acc, valid_obj = infer(valid_queue, model, criterion,
args.report_freq, args.world_size,
args.distributed, args.local_rank)
cond_logging('valid acc %f', valid_acc)
test_acc, test_obj = infer(test_queue, model, criterion,
args.report_freq, args.world_size,
args.distributed, args.local_rank)
cond_logging('test acc %f', test_acc)
return model
def train_network(args, network=None, data_set=None):
device = torch.device("cuda" if args.gpu_no >= 0 else "cpu")
if network is None:
if args.data_set == 'CIFAR10':
if 'vgg' in args.network:
network = VGG(args.network, args.data_set)
network = network.to(device)
print(network)
if data_set is None:
data_set = get_data_set(args, train_flag=True)
loss_calculator = Loss_Calculator()
optimizer, scheduler = get_optimizer(network, args)
if args.resume_flag:
check_point = torch.load(args.load_path)
network.load_state_dict(check_point['state_dict'])
loss_calculator.loss_seq = check_point['loss_seq']
args.start_epoch = check_point['epoch'] # update start epoch
print("Start at %s" % time.ctime())
print("-*-" * 10 + "\n\tTrain network\n" + "-*-" * 10)
for epoch in range(args.start_epoch, args.epoch):
print("---------- EPOCH %d ----------" % (epoch + 1))
# make shuffled data loader
data_loader = torch.utils.data.DataLoader(data_set,
batch_size=args.batch_size,
shuffle=True)
# train one epoch
train_step(network, data_loader, loss_calculator, optimizer, device,
epoch, args.print_freq)
# adjust learning rate
if scheduler is not None:
scheduler.step()
torch.save(
{
'epoch': epoch + 1,
'state_dict': network.state_dict(),
'loss_seq': loss_calculator.loss_seq
}, args.save_path + args.network + '_checkpoint.pth')
print("End at %s" % time.ctime())
return network
def load_model(dataset, rc, experiment_name):
loss = LossCombiner(4, dataset.class_weights, NllLoss)
transformer = TransformerEncoder(dataset.source_embedding,
hyperparameters=rc)
model = JointAspectTagger(transformer, rc, 4, 20, dataset.target_names)
optimizer = get_optimizer(model, rc)
trainer = Trainer(model,
loss,
optimizer,
rc,
dataset,
experiment_name,
enable_tensorboard=False,
verbose=False)
return trainer
def run_WrappedVOCSBDSegmentation5i_network():
from torch.utils import data
from model.head.pgn import PGN
import torch.nn.functional as F
from loss import cross_entropy2d
from optimizer import get_optimizer
batch_size = 4
epoch = 1
train_set = WrappedVOCSBDSegmentation5i(
root=roots_path,
fold=1,
# remember to run both train and test set
split='test',
rebuild_mask=False,
img_size=224)
train_loader = data.DataLoader(train_set,
batch_size=batch_size,
shuffle=True,
num_workers=8)
model = PGN()
optim = get_optimizer()(model.parameters(),
lr=0.0025,
momentum=0.9,
dampening=0,
weight_decay=0,
nesterov=False)
for e in range(epoch):
for i_iter, data in enumerate(train_loader):
Is, Ys, Iq, Yq, sample_class, _, _ = data
Ys, Yq = Ys.unsqueeze(1).float(), Yq.unsqueeze(1).float()
pred = model(Is, Ys, Iq)
pred = F.interpolate(pred,
size=Yq.size()[-2:],
mode='bilinear',
align_corners=True)
loss = cross_entropy2d(pred, Yq.long())
optim.zero_grad()
loss.backward()
optim.step()
print(loss.item(), sample_class)
def __init__(self, opt):
super(Model, self).__init__()
self.opt = opt
self.cleaner = FFA().to(device=opt.device)
#####################
# Init weights
#####################
# normal_init(self.cleaner)
print_network(self.cleaner)
self.g_optimizer = get_optimizer(opt, self.cleaner)
self.scheduler = get_scheduler(opt, self.g_optimizer)
self.avg_meters = ExponentialMovingAverage(0.95)
self.save_dir = os.path.join(opt.checkpoint_dir, opt.tag)
def search_grid_epochs(dataset,
epochs,
learnlist=[0.1],
optimizer='sgd',
start_wid=0,
test_size=1000):
train_step, init_op, reset_opt = get_optimizer(optimizer)
worker_time = Timer()
with tf.Session() as sess:
for wid, learn_rate in enumerate(learnlist):
step = 0
sess.run(init_op)
for e in range(epochs):
step = train_epochs(sess, wid + start_wid, 1, step, learn_rate,
dataset, test_size, train_step)
print('# worker time %3.1fs' % worker_time.split())
def main():
# spawn theano vars
xl = T.matrix('xl')
xr = T.matrix('xr')
y = T.ivector('y')
learning_rate = T.scalar('learning_rate')
trng = RandomStreams(4321)
# use test values
"""
import numpy as np
batch_size = 10
theano.config.compute_test_value = 'raise'
xl.tag.test_value = np.random.randn(batch_size, 392).astype(floatX)
xr.tag.test_value = np.random.randn(batch_size, 392).astype(floatX)
y.tag.test_value = np.random.randint(8, size=batch_size).astype(np.int32)
learning_rate.tag.test_value = 0.5
"""
# build cgs
model_l, model_r, model_b = build_model(
xl, xr, y, learning_rate, trng=trng,
**options)
# compile
opt = get_optimizer(options['optimizer'])
f_train_l = opt(learning_rate, model_l, [xl, y])
f_train_r = opt(learning_rate, model_r, [xr, y])
f_train_b = opt(learning_rate, model_b, [xl, xr, y], return_alpha=True)
# compile validation/test functions
f_valid_l = theano.function([xl, y], [model_l.cost, model_l.acc])
f_valid_r = theano.function([xr, y], [model_r.cost, model_r.acc])
f_valid_b = theano.function([xl, xr, y], [model_b.cost, model_b.acc])
# training loop
train(f_train_l, f_train_r, f_train_b, f_valid_l, f_valid_r, f_valid_b,
xl, xr, y, **options)