def objective(trial: optuna.Trial):
base_lr = trial.suggest_float("base_lr", 0.001, 0.05, step=0.001)
weight_decay = trial.suggest_loguniform("weight_decay", 1e-5, 1e-3)
ema = trial.suggest_categorical("ema", ["true", "false"])
ema_decay = trial.suggest_loguniform("ema_decay", 0.99,
0.9999) if ema == 'true' else None
@curry
def transform(image, label, training):
image = pad(image, 2)
image, label = to_tensor(image, label)
image = normalize(image, [0.1307], [0.3081])
label = tf.one_hot(label, 10)
return image, label
batch_size = 128
eval_batch_size = 256
ds_train, ds_test, steps_per_epoch, test_steps = make_mnist_dataset(
batch_size, eval_batch_size, transform, sub_ratio=0.01)
model = LeNet5()
model.build((None, 32, 32, 1))
criterion = CrossEntropy()
epochs = 20
lr_shcedule = CosineLR(base_lr, steps_per_epoch, epochs=epochs, min_lr=0)
optimizer = SGD(lr_shcedule,
momentum=0.9,
nesterov=True,
weight_decay=weight_decay)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
}
learner = SuperLearner(model,
criterion,
optimizer,
train_metrics=train_metrics,
eval_metrics=eval_metrics,
work_dir=f"./MNIST",
multiple_steps=True)
callbacks = [OptunaReportIntermediateResult('acc', trial)]
# if ema == 'true':
# callbacks.append(EMA(ema_decay))
learner.fit(ds_train,
epochs,
ds_test,
val_freq=2,
steps_per_epoch=steps_per_epoch,
val_steps=test_steps,
callbacks=callbacks)
return learner.metric_history.get_metric('acc', "eval")[-1]
('sep_conv_3x3', 0), ('dil_conv_3x3', 1),
('sep_conv_5x5', 0), ('sep_conv_3x3', 1),
('avg_pool_3x3', 0), ('dil_conv_3x3', 1)],
normal_concat=[2, 3, 4, 5],
reduce=[('sep_conv_5x5', 1), ('max_pool_3x3', 0),
('sep_conv_5x5', 1), ('sep_conv_5x5', 2),
('sep_conv_3x3', 0), ('sep_conv_3x3', 3),
('sep_conv_3x3', 1), ('sep_conv_3x3', 2)],
reduce_concat=[2, 3, 4, 5])
drop_path = 0.3
model = NASNet(16, 8, True, drop_path, 10, PC_DARTS_cifar)
model.build((None, 32, 32, 3))
model.summary()
criterion = CrossEntropy(auxiliary_weight=0.4)
base_lr = 0.025
epochs = 600
lr_schedule = CosineLR(base_lr * mul, steps_per_epoch, epochs=epochs, min_lr=0)
optimizer = SGD(lr_schedule, momentum=0.9, weight_decay=3e-4, nesterov=True)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
}
batch_size = 128
eval_batch_size = 2048
ds_train, ds_test, steps_per_epoch, test_steps = make_cifar100_dataset(
batch_size, eval_batch_size, transform, zip_transform)
setup_runtime(fp16=True)
ds_train, ds_test = distribute_datasets(ds_train, ds_test)
model = ResNet(depth=16, k=8, num_classes=100)
model.build((None, 32, 32, 3))
model.summary()
criterion = CrossEntropy(label_smoothing=params['label_smoothing'])
base_lr = params['base_lr']
epochs = 50
lr_schedule = CosineLR(base_lr, steps_per_epoch, epochs=epochs, min_lr=0)
optimizer = SGD(lr_schedule,
momentum=0.9,
weight_decay=params['weight_decay'],
nesterov=True)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
set_defaults({
'init': {
'mode': 'fan_out',
'distribution': 'untruncated_normal'
},
})
model = PyramidNet(16,
depth=270,
alpha=200,
block='bottleneck',
num_classes=100)
model.build((None, 32, 32, 3))
model.summary()
criterion = CrossEntropy(label_smoothing=0)
base_lr = 0.05
epochs = 1800
lr_schedule = CosineLR(base_lr * mul, steps_per_epoch, epochs=epochs, min_lr=0)
optimizer = SGD(lr_schedule, momentum=0.9, weight_decay=1e-4, nesterov=True)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
}
learner = SuperLearner(model,
setup_runtime(fp16=True)
ds_train, ds_eval = distribute_datasets(ds_train, ds_eval)
set_defaults({
'bn': {
'affine': False,
'track_running_stats': False,
},
})
set_primitives('tiny')
model = Network(4, 5)
model.build((None, 32, 32, 3))
criterion = CrossEntropy()
base_lr = 0.025
epochs = 240
lr_schedule = CosineLR(base_lr, steps_per_epoch, epochs=epochs, min_lr=1e-3)
optimizer_model = SGD(lr_schedule, momentum=0.9, weight_decay=3e-4)
optimizer_arch = AdamW(learning_rate=3e-4, beta_1=0.5, weight_decay=1e-3)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
}
def objective(trial: optuna.Trial):
cutout_prob = trial.suggest_float("cutout_prob", 0, 1.0, step=0.1)
mixup_alpha = trial.suggest_float("mixup_alpha", 0, 0.5, step=0.1)
label_smoothing = trial.suggest_uniform("label_smoothing", 0, 0.2)
base_lr = trial.suggest_float("base_lr", 0.01, 0.2, step=0.01)
weight_decay = trial.suggest_loguniform("weight_decay", 1e-5, 1e-3)
ema = trial.suggest_categorical("ema", ["true", "false"])
ema_decay = trial.suggest_loguniform("ema_decay", 0.995,
0.9999) if ema == 'true' else None
@curry
def transform(image, label, training):
if training:
image = random_crop(image, (32, 32), (4, 4))
image = tf.image.random_flip_left_right(image)
image = autoaugment(image, "CIFAR10")
image, label = to_tensor(image, label)
image = normalize(image, [0.491, 0.482, 0.447], [0.247, 0.243, 0.262])
if training:
image = random_apply(cutout(length=16), cutout_prob, image)
label = tf.one_hot(label, 100)
return image, label
def zip_transform(data1, data2):
return mixup(data1, data2, alpha=mixup_alpha)
batch_size = 128
eval_batch_size = 2048
ds_train, ds_test, steps_per_epoch, test_steps = make_cifar100_dataset(
batch_size, eval_batch_size, transform, zip_transform)
setup_runtime(fp16=True)
ds_train, ds_test = distribute_datasets(ds_train, ds_test)
model = ResNet(depth=16, k=8, num_classes=100)
model.build((None, 32, 32, 3))
model.summary()
criterion = CrossEntropy(label_smoothing=label_smoothing)
epochs = 50
lr_schedule = CosineLR(base_lr, steps_per_epoch, epochs=epochs, min_lr=0)
optimizer = SGD(lr_schedule,
momentum=0.9,
weight_decay=weight_decay,
nesterov=True)
train_metrics = {
'loss': Mean(),
'acc': CategoricalAccuracy(),
}
eval_metrics = {
'loss': CategoricalCrossentropy(from_logits=True),
'acc': CategoricalAccuracy(),
}
learner = SuperLearner(model,
criterion,
optimizer,
train_metrics=train_metrics,
eval_metrics=eval_metrics,
work_dir=f"./CIFAR100-NNI",
multiple_steps=True)
callbacks = [OptunaReportIntermediateResult('acc', trial)]
if ema == 'true':
callbacks.append(EMA(ema_decay))
learner.fit(ds_train,
epochs,
ds_test,
val_freq=1,
steps_per_epoch=steps_per_epoch,
val_steps=test_steps,
callbacks=callbacks)
return learner.metric_history.get_metric('acc', "eval")[-1]