def get_built_in_dataset(name, train=True, input_size=224, batch_size=256, num_workers=32,
shuffle=True, **kwargs):
"""Returns built-in popular image classification dataset based on provided string name ('cifar10', 'cifar100','mnist','imagenet').
"""
logger.info('get_built_in_dataset {}'.format(name))
name = name.lower()
if name in ['cifar10', 'cifar']:
import gluoncv.data.transforms as gcv_transforms
transform_split = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
]) if train else transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
return gluon.data.vision.CIFAR10(train=train).transform_first(transform_split)
elif name == 'cifar100':
import gluoncv.data.transforms as gcv_transforms
transform_split = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
]) if train else transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
return gluon.data.vision.CIFAR100(train=train).transform_first(transform_split)
elif name == 'mnist':
def transform(data, label):
return nd.transpose(data.astype(np.float32), (2,0,1))/255, label.astype(np.float32)
return gluon.data.vision.MNIST(train=train, transform=transform)
elif name == 'fashionmnist':
def transform(data, label):
return nd.transpose(data.astype(np.float32), (2,0,1))/255, label.astype(np.float32)
return gluon.data.vision.FashionMNIST(train=train, transform=transform)
elif name == 'imagenet':
# Please setup the ImageNet dataset following the tutorial from GluonCV
if train:
rec_file = '/media/ramdisk/rec/train.rec'
rec_file_idx = '/media/ramdisk/rec/train.idx'
else:
rec_file = '/media/ramdisk/rec/val.rec'
rec_file_idx = '/media/ramdisk/rec/val.idx'
data_loader = get_data_rec(input_size, 0.875, rec_file, rec_file_idx,
batch_size, num_workers, train, shuffle=shuffle,
**kwargs)
return data_loader
else:
raise NotImplementedError
def get_data_loader(data_dir, batch_size, num_workers):
normalize = transforms.Normalize([0.485, 0.456, 0.406],
[0.229, 0.224, 0.225])
jitter_param = 0.4
lighting_param = 0.1
input_size = opt.input_size
crop_ratio = opt.crop_ratio if opt.crop_ratio > 0 else 0.875
resize = int(math.ceil(input_size / crop_ratio))
def batch_fn(batch, ctx):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
return data, label
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(input_size, pad=4),
transforms.RandomFlipLeftRight(),
# transforms.RandomColorJitter(
# brightness=jitter_param,
# contrast=jitter_param,
# saturation=jitter_param),
# transforms.RandomLighting(lighting_param),
transforms.ToTensor(),
normalize
])
transform_test = transforms.Compose([
# transforms.Resize(resize, keep_ratio=True),
# transforms.CenterCrop(input_size),
transforms.Resize(input_size),
transforms.ToTensor(),
normalize
])
train_data = gluon.data.DataLoader(ImageNet32(
data_dir, train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(ImageNet32(
data_dir, train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
return train_data, val_data, batch_fn
def get_data(self, opt):
def batch_fn(batch, ctx):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
return data, label
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=True).transform_first(transform_train),
batch_size=opt.batch_size,
shuffle=True,
last_batch='discard',
num_workers=opt.num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=False).transform_first(transform_test),
batch_size=opt.batch_size,
shuffle=False,
num_workers=opt.num_workers)
return train_data, val_data, batch_fn
def main():
opt = parse_args()
batch_size = opt.batch_size
if opt.dataset == 'cifar10':
classes = 10
elif opt.dataset == 'cifar100':
classes = 100
else:
raise ValueError('Unknown Dataset')
if len(mx.test_utils.list_gpus()) == 0:
context = [mx.cpu()]
else:
context = [mx.gpu(int(i)) for i in opt.gpus.split(',') if i.strip()]
context = context if context else [mx.cpu()]
print("context: ", context)
num_gpus = len(context)
batch_size *= max(1, num_gpus)
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_period = opt.lr_decay_period
if opt.lr_decay_period > 0:
lr_decay_epoch = list(range(lr_decay_period, opt.num_epochs, lr_decay_period))
else:
# lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')]
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
lr_decay_epoch = [e - opt.warmup_epochs for e in lr_decay_epoch]
num_batches = 50000 // batch_size
lr_scheduler = LRSequential([
LRScheduler('linear', base_lr=0, target_lr=opt.lr,
nepochs=opt.warmup_epochs, iters_per_epoch=num_batches),
LRScheduler('cosine', base_lr=opt.lr, target_lr=0,
nepochs=opt.num_epochs - opt.warmup_epochs,
iters_per_epoch=num_batches,
step_epoch=lr_decay_epoch,
step_factor=lr_decay, power=2)
])
optimizer = 'nag'
if opt.cosine:
optimizer_params = {'wd': opt.wd, 'momentum': opt.momentum, 'lr_scheduler': lr_scheduler}
else:
optimizer_params = {'learning_rate': opt.lr, 'wd': opt.wd, 'momentum': opt.momentum}
layers = [opt.blocks] * 3
channels = [x * opt.channel_times for x in [16, 16, 32, 64]]
start_layer = opt.start_layer
askc_type = opt.askc_type
if channels[0] == 64:
cardinality = 32
elif channels[0] == 128:
cardinality = 64
bottleneck_width = 4
print("model: ", opt.model)
print("askc_type: ", opt.askc_type)
print("layers: ", layers)
print("channels: ", channels)
print("start_layer: ", start_layer)
print("classes: ", classes)
print("deep_stem: ", opt.deep_stem)
model_prefix = opt.dataset + '-' + askc_type
model_suffix = '-c-' + str(opt.channel_times) + '-s-' + str(opt.start_layer)
if opt.model == 'resnet':
net = CIFARAFFResNet(askc_type=askc_type, start_layer=start_layer, layers=layers,
channels=channels, classes=classes, deep_stem=opt.deep_stem)
model_name = model_prefix + '-resnet-' + str(sum(layers) * 2 + 2) + model_suffix
elif opt.model == 'resnext':
net = CIFARAFFResNeXt(askc_type=askc_type, start_layer=start_layer, layers=layers,
channels=channels, cardinality=cardinality,
bottleneck_width=bottleneck_width, classes=classes,
deep_stem=opt.deep_stem, use_se=False)
model_name = model_prefix + '-resneXt-' + str(sum(layers) * 3 + 2) + '-' + \
str(cardinality) + 'x' + str(bottleneck_width) + model_suffix
else:
raise ValueError('Unknown opt.model')
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context, ignore_extra=True)
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_name = opt.save_plot_dir
logging_handlers = [logging.StreamHandler()]
if opt.logging_dir:
logging_dir = opt.logging_dir
makedirs(logging_dir)
logging_handlers.append(logging.FileHandler('%s/train_%s.log' %
(logging_dir, model_name)))
logging.basicConfig(level=logging.INFO, handlers=logging_handlers)
logging.info(opt)
transform_train = []
if opt.auto_aug:
print('Using AutoAugment')
from autogluon.utils.augment import AugmentationBlock, autoaug_cifar10_policies
transform_train.append(AugmentationBlock(autoaug_cifar10_policies()))
transform_train.extend([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
transform_train = transforms.Compose(transform_train)
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx=label.context)
res[nd.arange(ind.shape[0], ctx=label.context), ind] = 1
return res
def mixup_transform(label, classes, lam=1, eta=0.0):
if isinstance(label, nd.NDArray):
label = [label]
res = []
for l in label:
y1 = l.one_hot(classes, on_value=1 - eta + eta/classes, off_value=eta/classes)
y2 = l[::-1].one_hot(classes, on_value=1 - eta + eta/classes, off_value=eta/classes)
res.append(lam*y1 + (1-lam)*y2)
return res
def smooth(label, classes, eta=0.1):
if isinstance(label, nd.NDArray):
label = [label]
smoothed = []
for l in label:
res = l.one_hot(classes, on_value=1 - eta + eta/classes, off_value = eta/classes)
smoothed.append(res)
return smoothed
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
if opt.summary:
summary(net, mx.nd.zeros((1, 3, 32, 32), ctx=ctx[0]))
sys.exit()
if opt.dataset == 'cifar10':
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
elif opt.dataset == 'cifar100':
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR100(train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR100(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
else:
raise ValueError('Unknown Dataset')
if opt.no_wd and opt.cosine:
for k, v in net.collect_params('.*beta|.*gamma|.*bias').items():
v.wd_mult = 0.0
trainer = gluon.Trainer(net.collect_params(), optimizer, optimizer_params)
if opt.label_smoothing or opt.mixup:
sparse_label_loss = False
else:
sparse_label_loss = True
metric = mx.metric.Accuracy()
train_metric = mx.metric.RMSE()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss(sparse_label=sparse_label_loss)
train_history = TrainingHistory(['training-error', 'validation-error'])
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
if not opt.cosine:
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
data_1 = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label_1 = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
if opt.mixup:
lam = np.random.beta(opt.mixup_alpha, opt.mixup_alpha)
if (epoch >= epochs - opt.mixup_off_epoch) or not opt.mixup:
lam = 1
data = [lam * X + (1 - lam) * X[::-1] for X in data_1]
if opt.label_smoothing:
eta = 0.1
else:
eta = 0.0
label = mixup_transform(label_1, classes, lam, eta)
elif opt.label_smoothing:
hard_label = label_1
label = smooth(label_1, classes)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
if opt.mixup:
output_softmax = [nd.SoftmaxActivation(out) for out in output]
train_metric.update(label, output_softmax)
else:
if opt.label_smoothing:
train_metric.update(hard_label, output)
else:
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
train_history.update([acc, 1 - val_acc])
train_history.plot(save_path='%s/%s_history.png' % (plot_name, model_name))
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters('%s/%.4f-%s-best.params' %
(save_dir, best_val_score, model_name))
name, val_acc = test(ctx, val_data)
logging.info('[Epoch %d] train=%f val=%f loss=%f lr: %f time: %f' %
(epoch, acc, val_acc, train_loss, trainer.learning_rate,
time.time() - tic))
host_name = socket.gethostname()
with open(opt.dataset + '_' + host_name + '_GPU_' + opt.gpus + '_best_Acc.log', 'a') as f:
f.write('best Acc: {:.4f}\n'.format(best_val_score))
print("best_val_score: ", best_val_score)
if not opt.summary:
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def train_net(net, config, check_flag, logger, sig_state, sig_pgbar, sig_table):
print(config)
# config = Configs()
# matplotlib.use('Agg')
# import matplotlib.pyplot as plt
sig_pgbar.emit(-1)
mx.random.seed(1)
matplotlib.use('Agg')
import matplotlib.pyplot as plt
classes = 10
num_epochs = config.train_cfg.epoch
batch_size = config.train_cfg.batchsize
optimizer = config.lr_cfg.optimizer
lr = config.lr_cfg.lr
num_gpus = config.train_cfg.gpu
batch_size *= max(1, num_gpus)
context = [mx.gpu(i)
for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
num_workers = config.data_cfg.worker
warmup = config.lr_cfg.warmup
if config.lr_cfg.decay == 'cosine':
lr_sch = lr_scheduler.CosineScheduler((50000//batch_size)*num_epochs,
base_lr=lr,
warmup_steps=warmup *
(50000//batch_size),
final_lr=1e-5)
else:
lr_sch = lr_scheduler.FactorScheduler((50000//batch_size)*config.lr_cfg.factor_epoch,
factor=config.lr_cfg.factor,
base_lr=lr,
warmup_steps=warmup*(50000//batch_size))
model_name = config.net_cfg.name
if config.data_cfg.mixup:
model_name += '_mixup'
if config.train_cfg.amp:
model_name += '_amp'
base_dir = './'+model_name
if os.path.exists(base_dir):
base_dir = base_dir + '-' + \
time.strftime("%m-%d-%H.%M.%S", time.localtime())
makedirs(base_dir)
if config.save_cfg.tensorboard:
logdir = base_dir+'/tb/'+model_name
if os.path.exists(logdir):
logdir = logdir + '-' + \
time.strftime("%m-%d-%H.%M.%S", time.localtime())
sw = SummaryWriter(logdir=logdir, flush_secs=5, verbose=False)
cmd_file = open(base_dir+'/tb.bat', mode='w')
cmd_file.write('tensorboard --logdir=./')
cmd_file.close()
save_period = 10
save_dir = base_dir+'/'+'params'
makedirs(save_dir)
plot_name = base_dir+'/'+'plot'
makedirs(plot_name)
stat_name = base_dir+'/'+'stat.txt'
csv_name = base_dir+'/'+'data.csv'
if os.path.exists(csv_name):
csv_name = base_dir+'/'+'data-' + \
time.strftime("%m-%d-%H.%M.%S", time.localtime())+'.csv'
csv_file = open(csv_name, mode='w', newline='')
csv_writer = csv.writer(csv_file)
csv_writer.writerow(['Epoch', 'train_loss', 'train_acc',
'valid_loss', 'valid_acc', 'lr', 'time'])
logging_handlers = [logging.StreamHandler(), logger]
logging_handlers.append(logging.FileHandler(
'%s/train_cifar10_%s.log' % (model_name, model_name)))
logging.basicConfig(level=logging.INFO, handlers=logging_handlers)
logging.info(config)
if config.train_cfg.amp:
amp.init()
if config.save_cfg.profiler:
profiler.set_config(profile_all=True,
aggregate_stats=True,
continuous_dump=True,
filename=base_dir+'/%s_profile.json' % model_name)
is_profiler_run = False
trans_list = []
imgsize = config.data_cfg.size
if config.data_cfg.crop:
trans_list.append(gcv_transforms.RandomCrop(
32, pad=config.data_cfg.crop_pad))
if config.data_cfg.cutout:
trans_list.append(CutOut(config.data_cfg.cutout_size))
if config.data_cfg.flip:
trans_list.append(transforms.RandomFlipLeftRight())
if config.data_cfg.erase:
trans_list.append(gcv_transforms.block.RandomErasing(s_max=0.25))
trans_list.append(transforms.Resize(imgsize))
trans_list.append(transforms.ToTensor())
trans_list.append(transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010]))
transform_train = transforms.Compose(trans_list)
transform_test = transforms.Compose([
transforms.Resize(imgsize),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx=label.context)
res[nd.arange(ind.shape[0], ctx=label.context), ind] = 1
return res
def test(ctx, val_data):
metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
num_batch = len(val_data)
test_loss = 0
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(
batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(
batch[1], ctx_list=ctx, batch_axis=0)
outputs = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(outputs, label)]
metric.update(label, outputs)
test_loss += sum([l.sum().asscalar() for l in loss])
test_loss /= batch_size * num_batch
name, val_acc = metric.get()
return name, val_acc, test_loss
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
if config.train_cfg.param_init:
init_func = getattr(mx.init, config.train_cfg.init)
net.initialize(init_func(), ctx=ctx, force_reinit=True)
else:
net.load_parameters(config.train_cfg.param_file, ctx=ctx)
summary(net, stat_name, nd.uniform(
shape=(1, 3, imgsize, imgsize), ctx=ctx[0]))
# net = nn.HybridBlock()
net.hybridize()
root = config.dir_cfg.dataset
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(
root=root, train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(
root=root, train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
trainer_arg = {'learning_rate': config.lr_cfg.lr,
'wd': config.lr_cfg.wd, 'lr_scheduler': lr_sch}
extra_arg = eval(config.lr_cfg.extra_arg)
trainer_arg.update(extra_arg)
trainer = gluon.Trainer(net.collect_params(), optimizer, trainer_arg)
if config.train_cfg.amp:
amp.init_trainer(trainer)
metric = mx.metric.Accuracy()
train_metric = mx.metric.RMSE()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss(
sparse_label=False if config.data_cfg.mixup else True)
train_history = TrainingHistory(['training-error', 'validation-error'])
# acc_history = TrainingHistory(['training-acc', 'validation-acc'])
loss_history = TrainingHistory(['training-loss', 'validation-loss'])
iteration = 0
best_val_score = 0
# print('start training')
sig_state.emit(1)
sig_pgbar.emit(0)
# signal.emit('Training')
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
for i, batch in enumerate(train_data):
if epoch == 0 and iteration == 1 and config.save_cfg.profiler:
profiler.set_state('run')
is_profiler_run = True
if epoch == 0 and iteration == 1 and config.save_cfg.tensorboard:
sw.add_graph(net)
lam = np.random.beta(alpha, alpha)
if epoch >= epochs - 20 or not config.data_cfg.mixup:
lam = 1
data_1 = gluon.utils.split_and_load(
batch[0], ctx_list=ctx, batch_axis=0)
label_1 = gluon.utils.split_and_load(
batch[1], ctx_list=ctx, batch_axis=0)
if not config.data_cfg.mixup:
data = data_1
label = label_1
else:
data = [lam*X + (1-lam)*X[::-1] for X in data_1]
label = []
for Y in label_1:
y1 = label_transform(Y, classes)
y2 = label_transform(Y[::-1], classes)
label.append(lam*y1 + (1-lam)*y2)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
if config.train_cfg.amp:
with ag.record():
with amp.scale_loss(loss, trainer) as scaled_loss:
ag.backward(scaled_loss)
# scaled_loss.backward()
else:
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
output_softmax = [nd.SoftmaxActivation(out) for out in output]
train_metric.update(label, output_softmax)
metric.update(label_1, output_softmax)
name, acc = train_metric.get()
if config.save_cfg.tensorboard:
sw.add_scalar(tag='lr', value=trainer.learning_rate,
global_step=iteration)
if epoch == 0 and iteration == 1 and config.save_cfg.profiler:
nd.waitall()
profiler.set_state('stop')
profiler.dump()
iteration += 1
sig_pgbar.emit(iteration)
if check_flag()[0]:
sig_state.emit(2)
while(check_flag()[0] or check_flag()[1]):
if check_flag()[1]:
print('stop')
return
else:
time.sleep(5)
print('pausing')
epoch_time = time.time() - tic
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
_, train_acc = metric.get()
name, val_acc, _ = test(ctx, val_data)
# if config.data_cfg.mixup:
# train_history.update([acc, 1-val_acc])
# plt.cla()
# train_history.plot(save_path='%s/%s_history.png' %
# (plot_name, model_name))
# else:
train_history.update([1-train_acc, 1-val_acc])
plt.cla()
train_history.plot(save_path='%s/%s_history.png' %
(plot_name, model_name))
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters('%s/%.4f-cifar-%s-%d-best.params' %
(save_dir, best_val_score, model_name, epoch))
current_lr = trainer.learning_rate
name, val_acc, val_loss = test(ctx, val_data)
logging.info('[Epoch %d] loss=%f train_acc=%f train_RMSE=%f\n val_acc=%f val_loss=%f lr=%f time: %f' %
(epoch, train_loss, train_acc, acc, val_acc, val_loss, current_lr, epoch_time))
loss_history.update([train_loss, val_loss])
plt.cla()
loss_history.plot(save_path='%s/%s_loss.png' %
(plot_name, model_name), y_lim=(0, 2), legend_loc='best')
if config.save_cfg.tensorboard:
sw._add_scalars(tag='Acc',
scalar_dict={'train_acc': train_acc, 'test_acc': val_acc}, global_step=epoch)
sw._add_scalars(tag='Loss',
scalar_dict={'train_loss': train_loss, 'test_loss': val_loss}, global_step=epoch)
sig_table.emit([epoch, train_loss, train_acc,
val_loss, val_acc, current_lr, epoch_time])
csv_writer.writerow([epoch, train_loss, train_acc,
val_loss, val_acc, current_lr, epoch_time])
csv_file.flush()
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epochs-1))
train(num_epochs, context)
if config.save_cfg.tensorboard:
sw.close()
for ctx in context:
ctx.empty_cache()
csv_file.close()
logging.shutdown()
reload(logging)
sig_state.emit(0)
def get_built_in_dataset(name,
train=True,
input_size=224,
batch_size=256,
num_workers=32,
shuffle=True,
**kwargs):
"""AutoGluonFunction
"""
print('get_built_in_dataset', name)
if name == 'cifar10' or name == 'cifar':
transform_split = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
]) if train else transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
return gluon.data.vision.CIFAR10(
train=train).transform_first(transform_split)
elif name == 'mnist':
def transform(data, label):
return nd.transpose(data.astype(np.float32),
(2, 0, 1)) / 255, label.astype(np.float32)
return gluon.data.vision.MNIST(train=train, transform=transform)
elif name == 'cifar100':
transform_split = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
]) if train else transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
return gluon.data.vision.CIFAR100(
train=train).transform_first(transform_split)
elif name == 'imagenet':
# Please setup the ImageNet dataset following the tutorial from GluonCV
if train:
rec_file = '/media/ramdisk/rec/train.rec'
rec_file_idx = '/media/ramdisk/rec/train.idx'
else:
rec_file = '/media/ramdisk/rec/val.rec'
rec_file_idx = '/media/ramdisk/rec/val.idx'
data_loader = get_data_rec(input_size,
0.875,
rec_file,
rec_file_idx,
batch_size,
num_workers,
train,
shuffle=shuffle,
**kwargs)
return data_loader
else:
raise NotImplemented
def main():
opt = parse_args()
bps.init()
gpu_name = subprocess.check_output(
['nvidia-smi', '--query-gpu=gpu_name', '--format=csv'])
gpu_name = gpu_name.decode('utf8').split('\n')[-2]
gpu_name = '-'.join(gpu_name.split())
filename = "cifar100-%d-%s-%s.log" % (bps.size(), gpu_name,
opt.logging_file)
filehandler = logging.FileHandler(filename)
streamhandler = logging.StreamHandler()
logger = logging.getLogger('')
logger.setLevel(logging.INFO)
logger.addHandler(filehandler)
logger.addHandler(streamhandler)
logger.info(opt)
batch_size = opt.batch_size
classes = 100
num_gpus = opt.num_gpus
# batch_size *= max(1, num_gpus)
context = mx.gpu(bps.local_rank()) if num_gpus > 0 else mx.cpu(
bps.local_rank())
num_workers = opt.num_workers
nworker = bps.size()
rank = bps.rank()
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')]
num_batches = 50000 // (opt.batch_size * nworker)
lr_scheduler = LRSequential([
LRScheduler('linear',
base_lr=opt.warmup_lr,
target_lr=opt.lr * nworker / bps.local_size(),
nepochs=opt.warmup_epochs,
iters_per_epoch=num_batches),
LRScheduler('step',
base_lr=opt.lr * nworker / bps.local_size(),
target_lr=0,
nepochs=opt.num_epochs - opt.warmup_epochs,
iters_per_epoch=num_batches,
step_epoch=lr_decay_epoch,
step_factor=lr_decay,
power=2)
])
num_batches = 50000 // (opt.batch_size * nworker)
lr_scheduler = LRSequential([
LRScheduler('linear',
base_lr=opt.warmup_lr,
target_lr=opt.lr * nworker / bps.local_size(),
nepochs=opt.warmup_epochs,
iters_per_epoch=num_batches),
LRScheduler('step',
base_lr=opt.lr * nworker / bps.local_size(),
target_lr=0,
nepochs=opt.num_epochs - opt.warmup_epochs,
iters_per_epoch=num_batches,
step_epoch=lr_decay_epoch,
step_factor=lr_decay,
power=2)
])
model_name = opt.model
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes, 'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
net = get_model(model_name, **kwargs)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
if opt.compressor:
optimizer = 'sgd'
else:
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
# from https://github.com/weiaicunzai/pytorch-cifar/blob/master/conf/global_settings.py
CIFAR100_TRAIN_MEAN = [
0.5070751592371323, 0.48654887331495095, 0.4409178433670343
]
CIFAR100_TRAIN_STD = [
0.2673342858792401, 0.2564384629170883, 0.27615047132568404
]
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize(CIFAR100_TRAIN_MEAN, CIFAR100_TRAIN_STD)
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize(CIFAR100_TRAIN_MEAN, CIFAR100_TRAIN_STD)
])
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=True).shard(nworker, rank).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=False).shard(nworker, rank).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
params = net.collect_params()
compression_params = {
"compressor": opt.compressor,
"ef": opt.ef,
"momentum": opt.compress_momentum,
"scaling": opt.onebit_scaling,
"k": opt.k,
"fp16": opt.fp16_pushpull
}
optimizer_params = {
'lr_scheduler': lr_scheduler,
'wd': opt.wd,
'momentum': opt.momentum
}
trainer = bps.DistributedTrainer(params,
optimizer,
optimizer_params,
compression_params=compression_params)
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
iteration = 0
best_val_score = 0
bps.byteps_declare_tensor("acc")
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, train_acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, train_acc = train_metric.get()
throughput = int(batch_size * nworker * i / (time.time() - tic))
logger.info(
'[Epoch %d] speed: %d samples/sec\ttime cost: %f lr=%f' %
(epoch, throughput, time.time() - tic, trainer.learning_rate))
name, val_acc = test(ctx, val_data)
acc = mx.nd.array([train_acc, val_acc], ctx=ctx[0])
bps.byteps_push_pull(acc, name="acc", is_average=False)
acc /= bps.size()
train_acc, val_acc = acc[0].asscalar(), acc[1].asscalar()
if bps.rank() == 0:
logger.info('[Epoch %d] training: %s=%f' %
(epoch, name, train_acc))
logger.info('[Epoch %d] validation: %s=%f' %
(epoch, name, val_acc))
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters(
'%s/%.4f-cifar-%s-%d-best.params' %
(save_dir, best_val_score, model_name, epoch))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar100-%s-%d.params' %
(save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('%s/cifar100-%s-%d.params' %
(save_dir, model_name, epochs - 1))
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def train_cifar(args, reporter):
print('args', args)
batch_size = args.batch_size
num_gpus = args.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i)
for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
num_workers = args.num_workers
model_name = args.model
net = get_model(model_name, classes=10)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
lr_scheduler = LRScheduler(mode='cosine',
base_lr=args.lr,
nepochs=args.epochs,
iters_per_epoch=len(train_data))
trainer = gluon.Trainer(net.collect_params(), 'sgd', {
'lr_scheduler': lr_scheduler,
'wd': args.wd,
'momentum': args.momentum
})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
iteration = 0
best_val_score = 0
start_epoch = 0
for epoch in range(start_epoch, epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
with mx.autograd.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
reporter(epoch=epoch, accuracy=val_acc)
train(args.epochs, context)
def main():
opt = parse_args()
batch_size = opt.batch_size
classes = 10
num_gpus = opt.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i) for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
model_name = opt.model
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes,
'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
net = get_model(model_name, **kwargs)
model_name += '_mixup'
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx = context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_name = opt.save_plot_dir
logging_handlers = [logging.StreamHandler()]
if opt.logging_dir:
logging_dir = opt.logging_dir
makedirs(logging_dir)
logging_handlers.append(logging.FileHandler('%s/train_cifar10_%s.log'%(logging_dir, model_name)))
logging.basicConfig(level=logging.INFO, handlers = logging_handlers)
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx = label.context)
res[nd.arange(ind.shape[0], ctx = label.context), ind] = 1
return res
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
trainer = gluon.Trainer(net.collect_params(), optimizer,
{'learning_rate': opt.lr, 'wd': opt.wd, 'momentum': opt.momentum})
metric = mx.metric.Accuracy()
train_metric = mx.metric.RMSE()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss(sparse_label=False)
train_history = TrainingHistory(['training-error', 'validation-error'])
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate*lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
lam = np.random.beta(alpha, alpha)
if epoch >= epochs - 20:
lam = 1
data_1 = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label_1 = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
data = [lam*X + (1-lam)*X[::-1] for X in data_1]
label = []
for Y in label_1:
y1 = label_transform(Y, classes)
y2 = label_transform(Y[::-1], classes)
label.append(lam*y1 + (1-lam)*y2)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
output_softmax = [nd.SoftmaxActivation(out) for out in output]
train_metric.update(label, output_softmax)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
train_history.update([acc, 1-val_acc])
train_history.plot(save_path='%s/%s_history.png'%(plot_name, model_name))
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters('%s/%.4f-cifar-%s-%d-best.params'%(save_dir, best_val_score, model_name, epoch))
name, val_acc = test(ctx, val_data)
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time()-tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epochs-1))
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def test(model):
if args.dataset == 'cifar10':
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=args.num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=args.num_workers)
elif args.dataset == 'cifar100':
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4865, 0.4409],
[0.2673, 0.2564, 0.2762])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4865, 0.4409],
[0.2673, 0.2564, 0.2762])
])
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
metric = mx.metric.Accuracy()
metric.reset()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=context,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=context,
batch_axis=0)
outputs = [model(X.astype(args.dtype, copy=False)) for X in data]
metric.update(label, outputs)
_, acc = metric.get()
print('\nTest-set Accuracy: ', acc)
return acc
save_dir = save_dir + opt.save_name
makedirs(save_dir)
logger = logging.getLogger()
logger.setLevel(logging.INFO)
log_save_dir = os.path.join(save_dir, 'log.txt')
fh = logging.FileHandler(log_save_dir)
fh.setLevel(logging.INFO)
logger.addHandler(fh)
logger.info(opt)
if opt.dataset == 'NC_CUB200':
transform_train = transforms.Compose([
# transforms.RandomResizedCrop(84),
transforms.Resize(256),
gcv_transforms.RandomCrop(224, pad=0),
# gcv_transforms.RandomCrop(224, pad=8),
transforms.RandomFlipLeftRight(),
# transforms.RandomColorJitter(brightness=0.4, contrast=0.4,
# saturation=0.4),
# transforms.RandomLighting(0.1),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
transform_test = transforms.Compose([
transforms.Resize(224),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
def train(net, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
if not opt.resume_from:
net.initialize(mx.init.Xavier(), ctx=ctx)
if opt.dataset == 'NC_CIFAR100':
n = mx.nd.zeros(shape=(1, 3, 32, 32), ctx=ctx[0]) #####init CNN
else:
raise KeyError('dataset keyerror')
for m in range(9):
net(n, m)
def makeSchedule(start_lr, base_lr, length, step, factor):
schedule = mx.lr_scheduler.MultiFactorScheduler(step=step,
factor=factor)
schedule.base_lr = base_lr
schedule = LinearWarmUp(schedule, start_lr=start_lr, length=length)
return schedule
# ==========================================================================
sesses = list(np.arange(opt.sess_num))
epochs = [opt.epoch] * opt.sess_num
lrs = [opt.base_lrs] + [opt.lrs] * (opt.sess_num - 1)
lr_decay = opt.lr_decay
base_decay_epoch = [int(i)
for i in opt.base_decay_epoch.split(',')] + [np.inf]
lr_decay_epoch = [base_decay_epoch
] + [[opt.inc_decay_epoch, np.inf]] * (opt.sess_num - 1)
AL_weight = opt.AL_weight
min_weight = opt.min_weight
oce_weight = opt.oce_weight
pdl_weight = opt.pdl_weight
max_weight = opt.max_weight
temperature = opt.temperature
use_AL = opt.use_AL # anchor loss
use_ng_min = opt.use_ng_min # Neural Gas min loss
use_ng_max = opt.use_ng_max # Neural Gas min loss
ng_update = opt.ng_update # Neural Gas update node
use_oce = opt.use_oce # old samples cross entropy loss
use_pdl = opt.use_pdl # probability distillation loss
use_nme = opt.use_nme # Similarity loss
use_warmUp = opt.use_warmUp
use_ng = opt.use_ng # Neural Gas
fix_conv = opt.fix_conv # fix cnn to train novel classes
fix_epoch = opt.fix_epoch
c_way = opt.c_way
k_shot = opt.k_shot
base_acc = opt.base_acc # base model acc
select_best_method = opt.select_best # select from _best, _best2, _best3
init_class = 60
anchor_num = 400
# ==========================================================================
acc_dict = {}
all_best_e = []
if model_name[-7:] != 'maxhead':
net.fc3.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc4.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc5.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc6.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc7.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc8.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc9.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
net.fc10.initialize(mx.init.Normal(sigma=0.001),
ctx=ctx,
force_reinit=True)
for sess in sesses:
logger.info('session : %d' % sess)
schedule = makeSchedule(start_lr=0,
base_lr=lrs[sess],
length=5,
step=lr_decay_epoch[sess],
factor=lr_decay)
# prepare the first anchor batch
if sess == 0 and opt.resume_from:
acc_dict[str(sess)] = list()
acc_dict[str(sess)].append([base_acc, 0])
all_best_e.append(0)
continue
# quick cnn totally unfix, not use data augmentation
if sess == 1 and model_name == 'quick_cnn' and use_AL:
transform_train = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
anchor_trans = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
else:
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4866, 0.4409],
[0.2009, 0.1984, 0.2023])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4866, 0.4409],
[0.2009, 0.1984, 0.2023])
])
anchor_trans = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4866, 0.4409],
[0.2009, 0.1984, 0.2023])
])
# ng_init and ng_update
if use_AL or use_nme or use_pdl or use_oce:
if sess != 0:
if ng_update == True:
if sess == 1:
update_anchor1, bmu, variances= \
prepare_anchor(DATASET,logger,anchor_trans,num_workers,feature_size,net,ctx,use_ng,init_class)
update_anchor_data = DataLoader(
update_anchor1,
anchor_trans,
update_anchor1.__len__(),
num_workers,
shuffle=False)
if opt.ng_var:
idx_1 = np.where(variances.asnumpy() > 0.5)
idx_2 = np.where(variances.asnumpy() < 0.5)
variances[idx_1] = 0.9
variances[idx_2] = 1
else:
base_class = init_class + (sess - 1) * 5
new_class = list(init_class + (sess - 1) * 5 +
(np.arange(5)))
new_set = DATASET(train=True,
fine_label=True,
fix_class=new_class,
base_class=base_class,
logger=logger)
update_anchor2 = merge_datasets(
update_anchor1, new_set)
update_anchor_data = DataLoader(
update_anchor2,
anchor_trans,
update_anchor2.__len__(),
num_workers,
shuffle=False)
elif (sess == 1):
update_anchor, bmu, variances = \
prepare_anchor(DATASET,logger,anchor_trans,num_workers,feature_size,net,ctx,use_ng,init_class)
update_anchor_data = DataLoader(update_anchor,
anchor_trans,
update_anchor.__len__(),
num_workers,
shuffle=False)
if opt.ng_var:
idx_1 = np.where(variances.asnumpy() > 0.5)
idx_2 = np.where(variances.asnumpy() < 0.5)
variances[idx_1] = 0.9
variances[idx_2] = 1
for batch in update_anchor_data:
anc_data = gluon.utils.split_and_load(batch[0],
ctx_list=[ctx[0]],
batch_axis=0)
anc_label = gluon.utils.split_and_load(batch[1],
ctx_list=[ctx[0]],
batch_axis=0)
with ag.pause():
anchor_feat, anchor_logit = net(anc_data[0], sess - 1)
anchor_feat = [anchor_feat]
anchor_logit = [anchor_logit]
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': lrs[sess],
'wd': opt.wd,
'momentum': opt.momentum
})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
# ==========================================================================
# all loss init
if use_nme:
def loss_fn_disG(f1, f2, weight):
f1 = f1.reshape(anchor_num, -1)
f2 = f2.reshape(anchor_num, -1)
similar = mx.nd.sum(f1 * f2, 1)
return (1 - similar) * weight
digG_weight = opt.nme_weight
if use_AL:
if model_name == 'quick_cnn':
AL_w = [120, 75, 120, 100, 50, 60, 90, 90]
AL_weight = AL_w[sess - 1]
else:
AL_weight = opt.AL_weight
if opt.ng_var:
def l2lossVar(feat, anc, weight, var):
dim = feat.shape[1]
feat = feat.reshape(-1, dim)
anc = anc.reshape(-1, dim)
loss = mx.nd.square(feat - anc)
loss = loss * weight * var
return mx.nd.mean(loss, axis=0, exclude=True)
loss_fn_AL = l2lossVar
else:
loss_fn_AL = gluon.loss.L2Loss(weight=AL_weight)
if use_pdl:
loss_fn_pdl = DistillationSoftmaxCrossEntropyLoss(
temperature=temperature, hard_weight=0, weight=pdl_weight)
if use_oce:
loss_fn_oce = gluon.loss.SoftmaxCrossEntropyLoss(weight=oce_weight)
if use_ng_min:
loss_fn_max = NG_Max_Loss(lmbd=max_weight, margin=0.5)
if use_ng_min:
min_loss = NG_Min_Loss(
num_classes=opt.c_way,
feature_size=feature_size,
lmbd=min_weight, # center weight = 0.01 in the paper
ctx=ctx[0])
min_loss.initialize(mx.init.Xavier(magnitude=2.24),
ctx=ctx,
force_reinit=True) # init matrix.
center_trainer = gluon.Trainer(
min_loss.collect_params(),
optimizer="sgd",
optimizer_params={"learning_rate":
opt.ng_min_lr}) # alpha=0.1 in the paper.
# ==========================================================================
lr_decay_count = 0
# dataloader
if opt.cum and sess == 1:
base_class = list(np.arange(init_class))
joint_data = DATASET(train=True,
fine_label=True,
c_way=init_class,
k_shot=500,
fix_class=base_class,
logger=logger)
if sess == 0:
base_class = list(np.arange(init_class))
new_class = list(init_class + (np.arange(5)))
base_data = DATASET(train=True,
fine_label=True,
c_way=init_class,
k_shot=500,
fix_class=base_class,
logger=logger)
bc_val_data = DataLoader(DATASET(train=False,
fine_label=True,
fix_class=base_class,
logger=logger),
transform_test,
100,
num_workers,
shuffle=False)
nc_val_data = DataLoader(DATASET(train=False,
fine_label=True,
fix_class=new_class,
base_class=len(base_class),
logger=logger),
transform_test,
100,
num_workers,
shuffle=False)
else:
base_class = list(np.arange(init_class + (sess - 1) * 5))
new_class = list(init_class + (sess - 1) * 5 + (np.arange(5)))
train_data_nc = DATASET(train=True,
fine_label=True,
c_way=c_way,
k_shot=k_shot,
fix_class=new_class,
base_class=len(base_class),
logger=logger)
bc_val_data = DataLoader(DATASET(train=False,
fine_label=True,
fix_class=base_class,
logger=logger),
transform_test,
100,
num_workers,
shuffle=False)
nc_val_data = DataLoader(DATASET(train=False,
fine_label=True,
fix_class=new_class,
base_class=len(base_class),
logger=logger),
transform_test,
100,
num_workers,
shuffle=False)
if sess == 0:
train_data = DataLoader(base_data,
transform_train,
min(batch_size, base_data.__len__()),
num_workers,
shuffle=True)
else:
if opt.cum: # cumulative : merge base and novel dataset.
joint_data = merge_datasets(joint_data, train_data_nc)
train_data = DataLoader(joint_data,
transform_train,
min(batch_size, joint_data.__len__()),
num_workers,
shuffle=True)
elif opt.use_all_novel: # use all novel data
if sess == 1:
novel_data = train_data_nc
else:
novel_data = merge_datasets(novel_data, train_data_nc)
train_data = DataLoader(novel_data,
transform_train,
min(batch_size, novel_data.__len__()),
num_workers,
shuffle=True)
else: # basic method
train_data = DataLoader(train_data_nc,
transform_train,
min(batch_size,
train_data_nc.__len__()),
num_workers,
shuffle=True)
for epoch in range(epochs[sess]):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss, train_anchor_loss, train_oce_loss = 0, 0, 0
train_disg_loss, train_pdl_loss, train_min_loss = 0, 0, 0
train_max_loss = 0
num_batch = len(train_data)
if use_warmUp:
lr = schedule(epoch)
trainer.set_learning_rate(lr)
else:
lr = trainer.learning_rate
if epoch == lr_decay_epoch[sess][lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
if sess != 0 and epoch < fix_epoch:
fix_cnn = fix_conv
else:
fix_cnn = False
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
all_loss = list()
with ag.record():
output_feat, output = net(data[0], sess, fix_cnn)
output_feat = [output_feat]
output = [output]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
all_loss.extend(loss)
if use_nme:
anchor_h = [net(X, sess, fix_cnn)[0] for X in anc_data]
disg_loss = [
loss_fn_disG(a_h, a, weight=digG_weight)
for a_h, a in zip(anchor_h, anchor_feat)
]
all_loss.extend(disg_loss)
if sess > 0 and use_ng_max:
max_loss = [
loss_fn_max(feat, label, feature_size, epoch, sess,
init_class)
for feat, label in zip(output_feat, label)
]
all_loss.extend(max_loss[0])
if sess > 0 and use_AL: # For anchor loss
anchor_h = [net(X, sess, fix_cnn)[0] for X in anc_data]
if opt.ng_var:
anchor_loss = [
loss_fn_AL(anchor_h[0], anchor_feat[0],
AL_weight, variances)
]
all_loss.extend(anchor_loss)
else:
anchor_loss = [
loss_fn_AL(a_h, a)
for a_h, a in zip(anchor_h, anchor_feat)
]
all_loss.extend(anchor_loss)
if sess > 0 and use_ng_min:
loss_min = min_loss(output_feat[0], label[0])
all_loss.extend(loss_min)
if sess > 0 and use_pdl:
anchor_l = [net(X, sess, fix_cnn)[1] for X in anc_data]
anchor_l = [anchor_l[0][:, :60 + (sess - 1) * 5]]
soft_label = [
mx.nd.softmax(anchor_logit[0][:, :60 +
(sess - 1) * 5] /
temperature)
]
pdl_loss = [
loss_fn_pdl(a_h, a,
soft_a) for a_h, a, soft_a in zip(
anchor_l, anc_label, soft_label)
]
all_loss.extend(pdl_loss)
if sess > 0 and use_oce:
anchorp = [net(X, sess, fix_cnn)[1] for X in anc_data]
oce_Loss = [
loss_fn_oce(ap, a)
for ap, a in zip(anchorp, anc_label)
]
all_loss.extend(oce_Loss)
all_loss = [nd.mean(l) for l in all_loss]
ag.backward(all_loss)
trainer.step(1, ignore_stale_grad=True)
if use_ng_min:
center_trainer.step(opt.c_way * opt.k_shot)
train_loss += sum([l.sum().asscalar() for l in loss])
if sess > 0 and use_AL:
train_anchor_loss += sum(
[al.mean().asscalar() for al in anchor_loss])
if sess > 0 and use_oce:
train_oce_loss += sum(
[al.mean().asscalar() for al in oce_Loss])
if sess > 0 and use_nme:
train_disg_loss += sum(
[al.mean().asscalar() for al in disg_loss])
if sess > 0 and use_pdl:
train_pdl_loss += sum(
[al.mean().asscalar() for al in pdl_loss])
if sess > 0 and use_ng_min:
train_min_loss += sum(
[al.mean().asscalar() for al in loss_min])
if sess > 0 and use_ng_max:
train_max_loss += sum(
[al.mean().asscalar() for al in max_loss[0]])
train_metric.update(label, output)
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, bc_val_acc = test(ctx, bc_val_data, net, sess)
name, nc_val_acc = test(ctx, nc_val_data, net, sess)
if epoch == 0:
acc_dict[str(sess)] = list()
acc_dict[str(sess)].append([bc_val_acc, nc_val_acc])
if sess == 0:
overall = bc_val_acc
else:
overall = (bc_val_acc * (init_class + (sess - 1) * 5) +
nc_val_acc * 5) / (init_class + sess * 5)
logger.info(
'[Epoch %d] lr=%.4f train=%.4f | val(base)=%.4f val(novel)=%.4f overall=%.4f | loss=%.8f anc loss=%.8f '
'pdl loss:%.8f oce loss: %.8f time: %.8f' %
(epoch, lr, acc, bc_val_acc, nc_val_acc, overall, train_loss,
train_anchor_loss / AL_weight, train_pdl_loss / pdl_weight,
train_oce_loss / oce_weight, time.time() - tic))
if use_nme:
logger.info('digG loss:%.8f' % (train_disg_loss / digG_weight))
if use_ng_min:
logger.info('min_loss:%.8f' % (train_min_loss / min_weight))
if use_ng_max:
logger.info('max_loss:%.8f' % (train_max_loss / max_weight))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/sess-%s-%d.params' %
(save_dir, model_name, epoch))
select = eval(select_best_method)
best_e = select(acc_dict, sess)
logger.info('best select : base: %f novel: %f ' %
(acc_dict[str(sess)][best_e][0],
acc_dict[str(sess)][best_e][1]))
if use_AL and model_name == 'quick_cnn':
reload_path = '%s/sess-%s-%d.params' % (save_dir, model_name,
best_e)
net.load_parameters(reload_path, ctx=context)
all_best_e.append(best_e)
reload_path = '%s/sess-%s-%d.params' % (save_dir, model_name, best_e)
net.load_parameters(reload_path, ctx=context)
with open('%s/acc_dict.json' % save_dir, 'w') as json_file:
json.dump(acc_dict, json_file)
plot_pr(acc_dict, sess, save_dir)
plot_all_sess(acc_dict, save_dir, all_best_e)
def main():
opt = parse_args()
batch_size = opt.batch_size
classes = 10
log_dir = os.path.join(opt.save_dir, "logs")
model_dir = os.path.join(opt.save_dir, "params")
if not os.path.exists(model_dir):
os.makedirs(model_dir)
# Init dataloader
jitter_param = 0.4
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.RandomBrightness(jitter_param),
transforms.RandomColorJitter(jitter_param),
transforms.RandomContrast(jitter_param),
transforms.RandomSaturation(jitter_param),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=opt.num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=opt.num_workers)
num_gpus = opt.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i)
for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
model_name = opt.model
model_name = opt.model
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes, 'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
net = get_model(model_name, **kwargs)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
def test(ctx, val_loader):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_loader):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(train_data, val_data, epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.hybridize()
net.initialize(mx.init.Xavier(), ctx=ctx)
net.forward(mx.nd.ones((1, 3, 30, 30), ctx=ctx[0]))
with SummaryWriter(logdir=log_dir, verbose=False) as sw:
sw.add_graph(net)
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd,
'momentum': opt.momentum
})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
iteration = 0
lr_decay_count = 0
best_val_score = 0
global_step = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
tbar = tqdm(train_data)
for i, batch in enumerate(tbar):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
global_step += len(loss)
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters('{}/{}-{}-{:04.3f}-best.params'.format(
model_dir, model_name, epoch, best_val_score))
with SummaryWriter(logdir=log_dir, verbose=False) as sw:
sw.add_scalar(tag="TrainLos",
value=train_loss,
global_step=global_step)
sw.add_scalar(tag="TrainAcc",
value=acc,
global_step=global_step)
sw.add_scalar(tag="ValAcc",
value=val_acc,
global_step=global_step)
sw.add_graph(net)
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time() - tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('{}/{}-{}.params'.format(
save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('{}/{}-{}.params'.format(
save_dir, model_name, epochs - 1))
if opt.mode == 'hybrid':
net.hybridize()
train(train_data, val_data, opt.num_epochs, context)
def main():
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
opt = parse_args()
batch_size = opt.batch_size
classes = 10
num_gpus = opt.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i)
for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
num_workers = opt.num_workers
lr_sch = lr_scheduler.CosineScheduler((50000//batch_size)*opt.num_epochs,
base_lr=opt.lr,
warmup_steps=5*(50000//batch_size),
final_lr=1e-5)
# lr_sch = lr_scheduler.FactorScheduler((50000//batch_size)*20,
# factor=0.2, base_lr=opt.lr,
# warmup_steps=5*(50000//batch_size))
# lr_sch = LRScheduler('cosine',opt.lr, niters=(50000//batch_size)*opt.num_epochs,)
model_name = opt.model
net = SKT_Lite()
# if model_name.startswith('cifar_wideresnet'):
# kwargs = {'classes': classes,
# 'drop_rate': opt.drop_rate}
# else:
# kwargs = {'classes': classes}
# net = get_model(model_name, **kwargs)
if opt.mixup:
model_name += '_mixup'
if opt.amp:
model_name += '_amp'
makedirs('./'+model_name)
os.chdir('./'+model_name)
sw = SummaryWriter(
logdir='.\\tb\\'+model_name, flush_secs=5, verbose=False)
makedirs(opt.save_plot_dir)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_name = opt.save_plot_dir
logging_handlers = [logging.StreamHandler()]
if opt.logging_dir:
logging_dir = opt.logging_dir
makedirs(logging_dir)
logging_handlers.append(logging.FileHandler(
'%s/train_cifar10_%s.log' % (logging_dir, model_name)))
logging.basicConfig(level=logging.INFO, handlers=logging_handlers)
logging.info(opt)
if opt.amp:
amp.init()
if opt.profile_mode:
profiler.set_config(profile_all=True,
aggregate_stats=True,
continuous_dump=True,
filename='%s_profile.json' % model_name)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
CutOut(8),
# gcv_transforms.block.RandomErasing(s_max=0.25),
transforms.RandomFlipLeftRight(),
# transforms.RandomFlipTopBottom(),
transforms.Resize(32),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.Resize(32),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx=label.context)
res[nd.arange(ind.shape[0], ctx=label.context), ind] = 1
return res
def test(ctx, val_data):
metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
num_batch = len(val_data)
test_loss = 0
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(
batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(
batch[1], ctx_list=ctx, batch_axis=0)
outputs = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(outputs, label)]
metric.update(label, outputs)
test_loss += sum([l.sum().asscalar() for l in loss])
test_loss /= batch_size * num_batch
name, val_acc = metric.get()
return name, val_acc, test_loss
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.MSRAPrelu(), ctx=ctx)
root = os.path.join('..', 'datasets', 'cifar-10')
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(
root=root, train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(
root=root, train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
trainer = gluon.Trainer(net.collect_params(), optimizer,
{'learning_rate': opt.lr, 'wd': opt.wd,
'momentum': opt.momentum, 'lr_scheduler': lr_sch})
if opt.amp:
amp.init_trainer(trainer)
metric = mx.metric.Accuracy()
train_metric = mx.metric.RMSE()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss(
sparse_label=False if opt.mixup else True)
train_history = TrainingHistory(['training-error', 'validation-error'])
# acc_history = TrainingHistory(['training-acc', 'validation-acc'])
loss_history = TrainingHistory(['training-loss', 'validation-loss'])
iteration = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
for i, batch in enumerate(train_data):
if epoch == 0 and iteration == 1 and opt.profile_mode:
profiler.set_state('run')
lam = np.random.beta(alpha, alpha)
if epoch >= epochs - 20 or not opt.mixup:
lam = 1
data_1 = gluon.utils.split_and_load(
batch[0], ctx_list=ctx, batch_axis=0)
label_1 = gluon.utils.split_and_load(
batch[1], ctx_list=ctx, batch_axis=0)
if not opt.mixup:
data = data_1
label = label_1
else:
data = [lam*X + (1-lam)*X[::-1] for X in data_1]
label = []
for Y in label_1:
y1 = label_transform(Y, classes)
y2 = label_transform(Y[::-1], classes)
label.append(lam*y1 + (1-lam)*y2)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
if opt.amp:
with ag.record():
with amp.scale_loss(loss, trainer) as scaled_loss:
ag.backward(scaled_loss)
# scaled_loss.backward()
else:
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
output_softmax = [nd.SoftmaxActivation(out) for out in output]
train_metric.update(label, output_softmax)
metric.update(label_1, output_softmax)
name, acc = train_metric.get()
sw.add_scalar(tag='lr', value=trainer.learning_rate,
global_step=iteration)
if epoch == 0 and iteration == 1 and opt.profile_mode:
nd.waitall()
profiler.set_state('stop')
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
_, train_acc = metric.get()
name, val_acc, _ = test(ctx, val_data)
if opt.mixup:
train_history.update([acc, 1-val_acc])
plt.cla()
train_history.plot(save_path='%s/%s_history.png' %
(plot_name, model_name))
else:
train_history.update([1-train_acc, 1-val_acc])
plt.cla()
train_history.plot(save_path='%s/%s_history.png' %
(plot_name, model_name))
# acc_history.update([train_acc, val_acc])
# plt.cla()
# acc_history.plot(save_path='%s/%s_acc.png' %
# (plot_name, model_name), legend_loc='best')
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters('%s/%.4f-cifar-%s-%d-best.params' %
(save_dir, best_val_score, model_name, epoch))
current_lr = trainer.learning_rate
name, val_acc, val_loss = test(ctx, val_data)
loss_history.update([train_loss, val_loss])
plt.cla()
loss_history.plot(save_path='%s/%s_loss.png' %
(plot_name, model_name), y_lim=(0, 2), legend_loc='best')
logging.info('[Epoch %d] loss=%f train_acc=%f train_RMSE=%f\n val_acc=%f val_loss=%f lr=%f time: %f' %
(epoch, train_loss, train_acc, acc, val_acc, val_loss, current_lr, time.time()-tic))
sw._add_scalars(tag='Acc',
scalar_dict={'train_acc': train_acc, 'test_acc': val_acc}, global_step=epoch)
sw._add_scalars(tag='Loss',
scalar_dict={'train_loss': train_loss, 'test_loss': val_loss}, global_step=epoch)
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epochs-1))
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
if opt.profile_mode:
profiler.dump(finished=False)
sw.close()
opt.dataset, model_name), time.localtime())
save_dir = save_dir + opt.save_name
makedirs(save_dir)
logger = logging.getLogger()
logger.setLevel(logging.INFO)
log_save_dir = os.path.join(save_dir, 'log.txt')
fh = logging.FileHandler(log_save_dir)
fh.setLevel(logging.INFO)
logger.addHandler(fh)
logger.info(opt)
if opt.dataset == 'NC_MINI_IMAGENET':
transform_train = transforms.Compose([
transforms.RandomResizedCrop(84),
gcv_transforms.RandomCrop(84, pad=8),
transforms.RandomFlipLeftRight(),
transforms.RandomColorJitter(brightness=0.4,
contrast=0.4,
saturation=0.4),
transforms.RandomLighting(0.1),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
anchor_trans = transforms.Compose([
def main():
opt = parse_args()
hvd.init()
batch_size = opt.batch_size
classes = 100
# num_gpus = opt.num_gpus
# batch_size *= max(1, num_gpus)
context = [mx.gpu(hvd.local_rank())]
num_workers = hvd.size()
rank = hvd.rank()
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
model_name = opt.model
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes,
'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
net = get_model(model_name, **kwargs)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx = context)
# optimizer = 'nag'
optimizer = opt.optimizer
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
# plot_path = opt.save_plot_dir
logging.basicConfig(level=logging.INFO,
filename="train_cifar100_qsparselocalsgd_{}_{}_{}_{}.log".format(opt.model, opt.optimizer, opt.batch_size, opt.lr),
filemode='a')
console = logging.StreamHandler()
console.setLevel(logging.INFO)
logging.getLogger('').addHandler(console)
if rank == 0:
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
optimizer_params = {'learning_rate': opt.lr, 'wd': opt.wd, 'momentum': opt.momentum}
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
# outputs = [net(X) for X in data]
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
# if opt.print_tensor_shape and rank == 0:
# print(net)
train_dataset = gluon.data.vision.CIFAR100(train=True).transform_first(transform_train)
train_data = gluon.data.DataLoader(
train_dataset,
sampler=SplitSampler(len(train_dataset), num_parts=num_workers, part_index=rank),
batch_size=batch_size, last_batch='discard', num_workers=opt.num_workers)
# val_dataset = gluon.data.vision.CIFAR100(train=False).transform_first(transform_test)
# val_data = gluon.data.DataLoader(
# val_dataset,
# sampler=SplitSampler(len(val_dataset), num_parts=num_workers, part_index=rank),
# batch_size=batch_size, num_workers=opt.num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR100(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=opt.num_workers)
hvd.broadcast_parameters(net.collect_params(), root_rank=0)
trainer = QSparseLocalSGDTrainerV1(
net.collect_params(),
'nag', optimizer_params,
input_sparse_ratio=1./opt.input_sparse,
output_sparse_ratio=1./opt.output_sparse,
layer_sparse_ratio=1./opt.layer_sparse,
local_sgd_interval=opt.local_sgd_interval)
# trainer = gluon.Trainer(net.collect_params(), optimizer,
# {'learning_rate': opt.lr, 'wd': opt.wd, 'momentum': opt.momentum})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
train_history = TrainingHistory(['training-error', 'validation-error'])
iteration = 0
lr_decay_count = 0
best_val_score = 0
lr = opt.lr
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
lr *= lr_decay
trainer.set_learning_rate(lr)
lr_decay_count += 1
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
mx.nd.waitall()
toc = time.time()
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
# name, val_acc = test(ctx, val_data)
trainer.pre_test()
name, val_acc = test(ctx, val_data)
trainer.post_test()
train_history.update([1-acc, 1-val_acc])
# train_history.plot(save_path='%s/%s_history.png'%(plot_path, model_name))
# allreduce the results
allreduce_array_nd = mx.nd.array([train_loss, acc, val_acc])
hvd.allreduce_(allreduce_array_nd, name='allreduce_array', average=True)
allreduce_array_np = allreduce_array_nd.asnumpy()
train_loss = np.asscalar(allreduce_array_np[0])
acc = np.asscalar(allreduce_array_np[1])
val_acc = np.asscalar(allreduce_array_np[2])
if val_acc > best_val_score:
best_val_score = val_acc
# net.save_parameters('%s/%.4f-cifar-%s-%d-best.params'%(save_dir, best_val_score, model_name, epoch))
if rank == 0:
logging.info('[Epoch %d] train=%f val=%f loss=%f comm=%.2f time: %f' %
(epoch, acc, val_acc, train_loss, trainer._comm_counter/1e6, toc-tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epoch))
trainer._comm_counter = 0.
if rank == 0:
if save_period and save_dir:
net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epochs-1))
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def main():
opt = parse_args()
batch_size = opt.batch_size
num_gpus = opt.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i) for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
for ctx in context:
mx.random.seed(seed_state=opt.random_seed, ctx=ctx)
np.random.seed(opt.random_seed)
random.seed(opt.random_seed)
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
save_period = opt.save_period
log_dir = opt.log_dir
save_dir = opt.save_dir
makedirs(save_dir)
makedirs(log_dir)
if opt.dataset == 'cifar10':
classes = 10
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
elif opt.dataset == 'cifar100':
classes = 100
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4865, 0.4409], [0.2673, 0.2564, 0.2762])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.5071, 0.4865, 0.4409], [0.2673, 0.2564, 0.2762])
])
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR100(train=True).transform_first(transform_train),
batch_size=batch_size, shuffle=True, last_batch='discard', num_workers=num_workers)
val_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR100(train=False).transform_first(transform_test),
batch_size=batch_size, shuffle=False, num_workers=num_workers)
model = models.__dict__[opt.arch](dataset=opt.dataset, depth=opt.depth)
model_name = opt.arch + '_' + str(opt.depth)
if opt.resume:
net.load_parameters(opt.resume, ctx=context)
sw = SummaryWriter(logdir=log_dir, flush_secs=5, verbose=False)
logging.basicConfig(level=logging.INFO)
logging.info(opt)
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
outputs = [model(X.astype(opt.dtype, copy=False)) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
model.initialize(mx.init.Xavier(), ctx=ctx)
trainer = gluon.Trainer(model.collect_params(), 'sgd',
{'learning_rate': opt.lr, 'wd': opt.wd, 'momentum': opt.momentum})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
btic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0], ctx_list=ctx, batch_axis=0)
label = gluon.utils.split_and_load(batch[1], ctx_list=ctx, batch_axis=0)
with ag.record():
output = [model(X.astype(opt.dtype, copy=False)) for X in data]
loss = [loss_fn(yhat, y.astype(opt.dtype, copy=False)) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
sw.add_scalar(tag='train_loss', value=train_loss / len(loss), global_step=iteration)
train_metric.update(label, output)
name, acc = train_metric.get()
sw.add_scalar(tag='train_{}_curves'.format(name),
value=('train_{}_value'.format(name), acc),
global_step=iteration)
if opt.log_interval and not (i + 1) % opt.log_interval:
logging.info('Epoch[%d] Batch [%d]\tSpeed: %f samples/sec\t%s=%f\tlr=%f' % (
epoch, i, batch_size * opt.log_interval / (time.time() - btic),
name, acc, trainer.learning_rate))
btic = time.time()
iteration += 1
if epoch == 0:
sw.add_graph(model)
train_loss /= batch_size * num_batch
_, acc = train_metric.get()
_, val_acc = test(ctx, val_data)
sw.add_scalar(tag='val_acc_curves', value=('valid_acc_value', val_acc), global_step=epoch)
if val_acc > best_val_score:
best_val_score = val_acc
model.save_parameters('%s/%.4f-%s-%s-%d-best.params' % (save_dir, best_val_score, opt.dataset, model_name, epoch))
trainer.save_states('%s/%.4f-%s-%s-%d-best.states' % (save_dir, best_val_score, opt.dataset, model_name, epoch))
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time() - tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
model.save_parameters('%s/%s-%s-%d.params' % (save_dir, opt.dataset, model_name, epoch))
trainer.save_states('%s/%s-%s-%d.states'%(save_dir, opt.datset, model_name, epoch))
if save_period and save_dir:
model.save_parameters('%s/%s-%s-%d.params' % (save_dir, opt.dataset, model_name, epochs - 1))
trainer.save_states('%s/%s-%s-%d.states' % (save_dir, opt.dataset, model_name, epochs - 1))
if opt.mode == 'hybrid':
model.hybridize()
train(opt.num_epochs, context)
def main():
opt = parse_args()
batch_size = opt.batch_size
if opt.dataset == 'cifar10':
classes = 10
elif opt.dataset == 'cifar100':
classes = 100
else:
raise ValueError('Unknown Dataset')
if len(mx.test_utils.list_gpus()) == 0:
context = [mx.cpu()]
else:
context = [mx.gpu(int(i)) for i in opt.gpus.split(',') if i.strip()]
context = context if context else [mx.cpu()]
print("context: ", context)
num_gpus = len(context)
batch_size *= max(1, num_gpus)
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
# layers = [18, 18, 18]
if opt.model == 'resnet':
layers = [opt.blocks] * 3
channels = [x * opt.channel_times for x in [16, 16, 32, 64]]
start_layer = opt.start_layer
net = ResNet110V2ASKC(in_askc_type=opt.askc_type,
layers=layers,
channels=channels,
classes=classes,
start_layer=start_layer)
model_name = 'resnet_' + opt.askc_type + '_blocks_' + str(opt.blocks) + '_channel_times_' + \
str(opt.channel_times) + '_start_layer_' + str(start_layer) + '_mixup'
print("opt.askc_type: ", opt.askc_type)
print("layers: ", layers)
print("channels: ", channels)
print("classes: ", classes)
print("start_layer: ", start_layer)
elif opt.model == 'resnext29_32x4d':
num_layers = 29
layer = (num_layers - 2) // 9
layers = [layer] * 3
cardinality = 32
bottleneck_width = 4
net = CIFARResNextASKC(layers,
cardinality,
bottleneck_width,
classes,
use_se=False)
model_name = 'resnext29_32x4d_askc_mixup'
elif opt.model == 'resnext38_32x4d':
num_layers = 38
layer = (num_layers - 2) // 9
layers = [layer] * 3
cardinality = 32
bottleneck_width = 4
net = CIFARResNextASKC(layers,
cardinality,
bottleneck_width,
classes,
use_se=False)
model_name = 'resnext47_32x4d_iaff_mixup'
elif opt.model == 'resnext47_32x4d':
num_layers = 47
layer = (num_layers - 2) // 9
layers = [layer] * 3
cardinality = 32
bottleneck_width = 4
net = CIFARResNextASKC(layers,
cardinality,
bottleneck_width,
classes,
use_se=False)
model_name = 'resnext47_32x4d_aff_mixup'
elif opt.model == 'se_resnext38_32x4d':
num_layers = 38
layer = (num_layers - 2) // 9
layers = [layer] * 3
cardinality = 32
bottleneck_width = 4
net = CIFARResNextASKC(layers,
cardinality,
bottleneck_width,
classes,
use_se=True)
model_name = 'se_resnext38_32x4d_askc_mixup'
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_name = opt.save_plot_dir
logging_handlers = [logging.StreamHandler()]
if opt.logging_dir:
logging_dir = opt.logging_dir
makedirs(logging_dir)
logging_handlers.append(
logging.FileHandler('%s/train_%s_%s.log' %
(logging_dir, opt.dataset, model_name)))
logging.basicConfig(level=logging.INFO, handlers=logging_handlers)
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx=label.context)
res[nd.arange(ind.shape[0], ctx=label.context), ind] = 1
return res
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
if opt.summary:
summary(net, mx.nd.zeros((1, 3, 32, 32), ctx=ctx[0]))
sys.exit()
if opt.dataset == 'cifar10':
# CIFAR10
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
elif opt.dataset == 'cifar100':
# CIFAR100
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
else:
raise ValueError('Unknown Dataset')
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd,
'momentum': opt.momentum
})
metric = mx.metric.Accuracy()
train_metric = mx.metric.RMSE()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss(sparse_label=False)
train_history = TrainingHistory(['training-error', 'validation-error'])
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
lam = np.random.beta(alpha, alpha)
if epoch >= epochs - 20:
lam = 1
data_1 = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label_1 = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
data = [lam * X + (1 - lam) * X[::-1] for X in data_1]
label = []
for Y in label_1:
y1 = label_transform(Y, classes)
y2 = label_transform(Y[::-1], classes)
label.append(lam * y1 + (1 - lam) * y2)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
output_softmax = [nd.SoftmaxActivation(out) for out in output]
train_metric.update(label, output_softmax)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
train_history.update([acc, 1 - val_acc])
train_history.plot(save_path='%s/%s_history.png' %
(plot_name, model_name))
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters(
'%s/%.4f-%s-%s-best.params' %
(save_dir, best_val_score, opt.dataset, model_name))
name, val_acc = test(ctx, val_data)
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time() - tic))
host_name = socket.gethostname()
with open(
opt.dataset + '_' + host_name + '_GPU_' + opt.gpus +
'_best_Acc.log', 'a') as f:
f.write('best Acc: {:.4f}\n'.format(best_val_score))
if not opt.summary:
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
plot_name = opt.save_plot_dir
logging_handlers = [logging.StreamHandler()]
if opt.logging_dir:
logging_dir = opt.logging_dir
makedirs(logging_dir)
logging_handlers.append(
logging.FileHandler('%s/train_cifar10_%s.log' %
(logging_dir, model_name)))
logging.basicConfig(level=logging.INFO, handlers=logging_handlers)
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465], [0.2023, 0.1994, 0.2010])
])
def label_transform(label, classes):
ind = label.astype('int')
res = nd.zeros((ind.shape[0], classes), ctx=label.context)
res[nd.arange(ind.shape[0], ctx=label.context), ind] = 1
import numpy as np
import mxnet as mx
from mxnet import nd, autograd, gluon, context
from mxnet.gluon.data.vision import transforms, CIFAR10
from gluoncv.data import transforms as gcv_transforms
# ## 2. Prepare Data
# ### 2.1 Define Data Transformers
# In[3]:
train_transformer = transforms.Compose([
gcv_transforms.RandomCrop(cfg.IMAGE_SIZE, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize(cfg.CIFAR10_MEAN, cfg.CIFAR10_STD)
])
test_transformer = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize(cfg.CIFAR10_MEAN, cfg.CIFAR10_STD)
])
LOG(INFO, 'Data Transformers defining done')
# ### 2.2 Load Dataset
# In[4]:
def __init__(self,
batch_size,
good_sample_ratio,
sub_sampling,
dataset,
mixedmodel=False):
self.transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
self.transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
self.dataset_name = dataset
self.dataset = {}
self.label_size = 10
if dataset == 'mnist':
dataset_handle = MNIST
elif dataset == 'fashionmnist':
dataset_handle = FashionMNIST
elif dataset == 'cifar10':
dataset_handle = CIFAR10
else:
raise NotImplementedError
self.good_sample_ratio = good_sample_ratio
self.batch_size = batch_size
if not os.path.isfile(save_data_process):
print('using handle')
train = dataset_handle(train=True, )
test = dataset_handle(train=False, )
print('finished building train and test')
size_train = train._label.shape[0]
print('size of dataset:', size_train)
if sub_sampling < 1.0:
size_ptrain = int(size_train * sub_sampling)
subsample_idx = np.random.choice(size_train,
size_ptrain,
replace=False)
train._data = train._data[subsample_idx]
train._label = train._label[subsample_idx]
print('finish subsampling')
self.dataset['train'] = copy.deepcopy(train)
self.dataset['test'] = copy.deepcopy(test)
self.dataset['test-bad'] = copy.deepcopy(test)
print('finish deepcopy')
if self.dataset_name != 'cifar10':
self.dataset['train']._data = mx.nd.transpose(
train._data, axes=(0, 3, 1, 2)).astype('float32') / 255.0
self.dataset['test']._data = mx.nd.transpose(
test._data, axes=(0, 3, 1, 2)).astype('float32') / 255.0
self.num_train, self.num_test = self.dataset['train']._label.shape[
0], self.dataset['test']._label.shape[0]
print('start flipping labels')
print('making bad training set')
cnt_label = {}
for idx, label in enumerate(self.dataset['train']._label):
cnt_label[label] = cnt_label.get(label, 0) + 1
cnt_good_label_tgt = {}
for k, v in cnt_label.items():
cnt_good_label_tgt[k] = int(v * self.good_sample_ratio)
manipulate_label = {}
good_idx_set = []
for idx, label in enumerate(self.dataset['train']._label):
manipulate_label[label] = manipulate_label.get(label, 0) + 1
if manipulate_label[label] > cnt_good_label_tgt[label]:
if not mixedmodel:
p = np.random.randint(0, self.label_size)
while True:
if p != label:
self.dataset['train']._label[idx] = p
break
p = np.random.randint(0, self.label_size)
else:
p = label + 1 if label < self.label_size - 1 else 0
self.dataset['train']._label[idx] = p
else:
good_idx_set.append(idx)
self.good_idx_set = good_idx_set
print('making bad validation set')
cnt_label_val = {}
for idx, label in enumerate(self.dataset['test-bad']._label):
cnt_label_val[label] = cnt_label_val.get(label, 0) + 1
cnt_good_label_tgt_val = {}
for k, v in cnt_label_val.items():
cnt_good_label_tgt_val[k] = int(v * self.good_sample_ratio)
manipulate_label_val = {}
good_idx_set_val = []
for idx, label in enumerate(self.dataset['test-bad']._label):
manipulate_label_val[label] = manipulate_label_val.get(
label, 0) + 1
if manipulate_label_val[label] > cnt_good_label_tgt_val[label]:
if not mixedmodel:
p = np.random.randint(0, self.label_size)
while True:
if p != label:
self.dataset['test-bad']._label[idx] = p
break
p = np.random.randint(0, self.label_size)
else:
p = label + 1 if label < self.label_size - 1 else 0
self.dataset['test-bad']._label[idx] = p
else:
good_idx_set_val.append(idx)
self.good_idx_set_val = good_idx_set_val
print('finish flipping labels')
self.good_idx_array = np.array(self.good_idx_set)
self.all_idx_array = np.arange(len(self.dataset['train']._label))
self.bad_idx_array = np.setdiff1d(self.all_idx_array,
self.good_idx_array)
self.dataset['train']._data = mx.nd.concat(
self.dataset['train']._data[self.good_idx_array],
self.dataset['train']._data[self.bad_idx_array],
dim=0)
self.dataset['train']._label = np.concatenate(
(self.dataset['train']._label[self.good_idx_array],
self.dataset['train']._label[self.bad_idx_array]),
axis=0)
self.good_idx_array = np.arange(len(self.good_idx_array))
self.bad_idx_array = np.setdiff1d(self.all_idx_array,
self.good_idx_array)
save = {}
save['train_data'] = self.dataset['train']
save['test_data'] = self.dataset['test']
save['test_data_bad'] = self.dataset['test-bad']
save['good_idx_array'] = self.good_idx_array
save['bad_idx_array'] = self.bad_idx_array
save['all_idx_array'] = self.all_idx_array
with open(save_data_process, "wb") as f:
pickle.dump(save, f)
else:
with open(save_data_process, "rb") as f:
save = pickle.load(f)
self.dataset['train'] = save['train_data']
self.dataset['test'] = save['test_data']
self.good_idx_array = save['good_idx_array']
self.bad_idx_array = save['bad_idx_array']
self.all_idx_array = save['all_idx_array']
self.dataset['test-bad'] = save['test_data_bad']
if self.dataset_name == 'cifar10':
self.val_data = gluon.data.DataLoader(
self.dataset['test'].transform_first(self.transform_test),
batch_size=batch_size,
shuffle=False)
else:
self.val_data = gluon.data.DataLoader(self.dataset['test'],
batch_size=batch_size,
shuffle=False)
if self.dataset_name == 'cifar10':
self.val_data_bad = gluon.data.DataLoader(
self.dataset['test-bad'].transform_first(self.transform_test),
batch_size=batch_size,
shuffle=False)
else:
self.val_data_bad = gluon.data.DataLoader(self.dataset['test-bad'],
batch_size=batch_size,
shuffle=False)
def main():
opt = parse_args()
batch_size = opt.batch_size
if opt.dataset == 'cifar10':
classes = 10
elif opt.dataset == 'cifar100':
classes = 100
else:
raise ValueError('Unknown Dataset')
if len(mx.test_utils.list_gpus()) == 0:
context = [mx.cpu()]
else:
context = [mx.gpu(int(i)) for i in opt.gpus.split(',') if i.strip()]
context = context if context else [mx.cpu()]
print("context: ", context)
num_gpus = len(context)
batch_size *= max(1, num_gpus)
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
model_name = 'ResNet20_b_' + str(opt.blocks) + '_' + opt.act_type
print("model_name", model_name)
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes, 'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
# scenario = 'ATAC'
# main config
layers = [opt.blocks] * 3
channels = [x * 1 for x in [16, 16, 32, 64]]
act_type = opt.act_type # relu, prelu, elu, selu, gelu, swish, xUnit, ChaATAC
r = opt.r
# spatial scope
skernel = 3
dilation = 1
act_dilation = 1 # (8, 16), 4
# ablation study
useReLU = opt.useReLU
useGlobal = opt.useGlobal
asBackbone = False
act_layers = opt.act_layers
replace_act = 'relu'
act_order = 'bac' # 'pre', 'bac'
print("model: ", opt.model)
print("r: ", opt.r)
if opt.model == 'atac':
net = ResNet20V2ATAC(layers=layers,
channels=channels,
classes=classes,
act_type=act_type,
r=r,
skernel=skernel,
dilation=dilation,
useReLU=useReLU,
useGlobal=useGlobal,
act_layers=act_layers,
replace_act=replace_act,
act_order=act_order,
asBackbone=asBackbone)
print("layers: ", layers)
print("channels: ", channels)
print("act_type: ", act_type)
print("skernel: ", skernel)
print("dilation: ", dilation)
print("act_dilation: ", act_dilation)
print("useReLU: ", useReLU)
print("useGlobal: ", useGlobal)
print("asBackbone: ", asBackbone)
print("act_layers: ", act_layers)
print("replace_act: ", replace_act)
print("act_order: ", act_order)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_path = opt.save_plot_dir
logging.basicConfig(level=logging.INFO)
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.MSRAPrelu(), ctx=ctx)
if opt.summary:
net.summary(mx.nd.zeros((1, 3, 32, 32)))
if opt.dataset == 'cifar10':
# CIFAR10
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
elif opt.dataset == 'cifar100':
# CIFAR100
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR100(
train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
else:
raise ValueError('Unknown Dataset')
if optimizer == 'nag':
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd,
'momentum': opt.momentum
})
elif optimizer == 'adagrad':
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd
})
elif optimizer == 'adam':
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd
})
else:
raise ValueError('Unknown optimizer')
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
train_history = TrainingHistory(['training-error', 'validation-error'])
host_name = socket.gethostname()
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
train_history.update([1 - acc, 1 - val_acc])
train_history.plot(save_path='%s/%s_history.png' %
(plot_path, model_name))
if val_acc > best_val_score:
best_val_score = val_acc
# net.save_parameters('%s/%.4f-cifar-%s-%d-best.params'%(save_dir, best_val_score, model_name, epoch))
pass
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time() - tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
# net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epoch))
pass
if epoch == epochs - 1:
with open(
opt.dataset + '_' + host_name + '_GPU_' + opt.gpus +
'_best_Acc.log', 'a') as f:
f.write('best Acc: {:.4f}\n'.format(best_val_score))
print("best_val_score: ", best_val_score)
if save_period and save_dir:
# net.save_parameters('%s/cifar10-%s-%d.params'%(save_dir, model_name, epochs-1))
pass
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def main():
opt = parse_args()
batch_size = opt.batch_size
classes = 10
num_gpus = opt.num_gpus
batch_size *= max(1, num_gpus)
context = [mx.gpu(i)
for i in range(num_gpus)] if num_gpus > 0 else [mx.cpu()]
num_workers = opt.num_workers
lr_decay = opt.lr_decay
lr_decay_epoch = [int(i) for i in opt.lr_decay_epoch.split(',')] + [np.inf]
model_name = opt.model
if model_name.startswith('cifar_wideresnet'):
kwargs = {'classes': classes, 'drop_rate': opt.drop_rate}
else:
kwargs = {'classes': classes}
net = get_model(model_name, **kwargs)
if opt.resume_from:
net.load_parameters(opt.resume_from, ctx=context)
optimizer = 'nag'
save_period = opt.save_period
if opt.save_dir and save_period:
save_dir = opt.save_dir
makedirs(save_dir)
else:
save_dir = ''
save_period = 0
plot_path = opt.save_plot_dir
logging.basicConfig(level=logging.INFO)
logging.info(opt)
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
def test(ctx, val_data):
metric = mx.metric.Accuracy()
for i, batch in enumerate(val_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
outputs = [net(X) for X in data]
metric.update(label, outputs)
return metric.get()
def train(epochs, ctx):
if isinstance(ctx, mx.Context):
ctx = [ctx]
net.initialize(mx.init.Xavier(), ctx=ctx)
train_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=True).take(256).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch='discard',
num_workers=num_workers)
val_data = gluon.data.DataLoader(gluon.data.vision.CIFAR10(
train=False).take(64).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
trainer = gluon.Trainer(net.collect_params(), optimizer, {
'learning_rate': opt.lr,
'wd': opt.wd,
'momentum': opt.momentum
})
metric = mx.metric.Accuracy()
train_metric = mx.metric.Accuracy()
loss_fn = gluon.loss.SoftmaxCrossEntropyLoss()
iteration = 0
lr_decay_count = 0
best_val_score = 0
for epoch in range(epochs):
tic = time.time()
train_metric.reset()
metric.reset()
train_loss = 0
num_batch = len(train_data)
alpha = 1
if epoch == lr_decay_epoch[lr_decay_count]:
trainer.set_learning_rate(trainer.learning_rate * lr_decay)
lr_decay_count += 1
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0)
with ag.record():
output = [net(X) for X in data]
loss = [loss_fn(yhat, y) for yhat, y in zip(output, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
train_loss += sum([l.sum().asscalar() for l in loss])
train_metric.update(label, output)
name, acc = train_metric.get()
iteration += 1
train_loss /= batch_size * num_batch
name, acc = train_metric.get()
name, val_acc = test(ctx, val_data)
if val_acc > best_val_score:
best_val_score = val_acc
net.save_parameters(
'%s/%.4f-cifar-%s-%d-best.params' %
(save_dir, best_val_score, model_name, epoch))
logging.info('[Epoch %d] train=%f val=%f loss=%f time: %f' %
(epoch, acc, val_acc, train_loss, time.time() - tic))
if save_period and save_dir and (epoch + 1) % save_period == 0:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epoch))
if save_period and save_dir:
net.save_parameters('%s/cifar10-%s-%d.params' %
(save_dir, model_name, epochs - 1))
if opt.mode == 'hybrid':
net.hybridize()
train(opt.num_epochs, context)
def train_cifar10(args, config, reporter):
vars(args).update(config)
np.random.seed(args.seed)
random.seed(args.seed)
mx.random.seed(args.seed)
# Set Hyper-params
batch_size = args.batch_size * max(args.num_gpus, 1)
ctx = [mx.gpu(i)
for i in range(args.num_gpus)] if args.num_gpus > 0 else [mx.cpu()]
# Define DataLoader
transform_train = transforms.Compose([
gcv_transforms.RandomCrop(32, pad=4),
transforms.RandomFlipLeftRight(),
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
transform_test = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.4914, 0.4822, 0.4465],
[0.2023, 0.1994, 0.2010])
])
train_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=True).transform_first(transform_train),
batch_size=batch_size,
shuffle=True,
last_batch="discard",
num_workers=args.num_workers)
test_data = gluon.data.DataLoader(
gluon.data.vision.CIFAR10(train=False).transform_first(transform_test),
batch_size=batch_size,
shuffle=False,
num_workers=args.num_workers)
# Load model architecture and Initialize the net with pretrained model
finetune_net = get_model(args.model, pretrained=True)
with finetune_net.name_scope():
finetune_net.fc = nn.Dense(args.classes)
finetune_net.fc.initialize(init.Xavier(), ctx=ctx)
finetune_net.collect_params().reset_ctx(ctx)
finetune_net.hybridize()
# Define trainer
trainer = gluon.Trainer(finetune_net.collect_params(), "sgd", {
"learning_rate": args.lr,
"momentum": args.momentum,
"wd": args.wd
})
L = gluon.loss.SoftmaxCrossEntropyLoss()
metric = mx.metric.Accuracy()
def train(epoch):
for i, batch in enumerate(train_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0,
even_split=False)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0,
even_split=False)
with ag.record():
outputs = [finetune_net(X) for X in data]
loss = [L(yhat, y) for yhat, y in zip(outputs, label)]
for l in loss:
l.backward()
trainer.step(batch_size)
mx.nd.waitall()
def test():
test_loss = 0
for i, batch in enumerate(test_data):
data = gluon.utils.split_and_load(batch[0],
ctx_list=ctx,
batch_axis=0,
even_split=False)
label = gluon.utils.split_and_load(batch[1],
ctx_list=ctx,
batch_axis=0,
even_split=False)
outputs = [finetune_net(X) for X in data]
loss = [L(yhat, y) for yhat, y in zip(outputs, label)]
test_loss += sum(l.mean().asscalar() for l in loss) / len(loss)
metric.update(label, outputs)
_, test_acc = metric.get()
test_loss /= len(test_data)
reporter(mean_loss=test_loss, mean_accuracy=test_acc)
for epoch in range(1, args.epochs + 1):
train(epoch)
test()
