def main():
print("Local rank: ", hvd.local_rank(), hvd.size())
logdir = osp.join(FLAGS.logdir, FLAGS.exp)
if hvd.rank() == 0:
if not osp.exists(logdir):
os.makedirs(logdir)
logger = TensorBoardOutputFormat(logdir)
else:
logger = None
LABEL = None
print("Loading data...")
if FLAGS.dataset == 'cifar10':
dataset = Cifar10(augment=FLAGS.augment, rescale=FLAGS.rescale)
test_dataset = Cifar10(train=False, rescale=FLAGS.rescale)
channel_num = 3
X_NOISE = tf.placeholder(shape=(None, 32, 32, 3), dtype=tf.float32)
X = tf.placeholder(shape=(None, 32, 32, 3), dtype=tf.float32)
LABEL = tf.placeholder(shape=(None, 10), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 10), dtype=tf.float32)
if FLAGS.large_model:
model = ResNet32Large(num_channels=channel_num,
num_filters=128,
train=True)
elif FLAGS.larger_model:
model = ResNet32Larger(num_channels=channel_num, num_filters=128)
elif FLAGS.wider_model:
model = ResNet32Wider(num_channels=channel_num, num_filters=192)
else:
model = ResNet32(num_channels=channel_num, num_filters=128)
elif FLAGS.dataset == 'imagenet':
dataset = Imagenet(train=True)
test_dataset = Imagenet(train=False)
channel_num = 3
X_NOISE = tf.placeholder(shape=(None, 32, 32, 3), dtype=tf.float32)
X = tf.placeholder(shape=(None, 32, 32, 3), dtype=tf.float32)
LABEL = tf.placeholder(shape=(None, 1000), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 1000), dtype=tf.float32)
model = ResNet32Wider(num_channels=channel_num, num_filters=256)
elif FLAGS.dataset == 'imagenetfull':
channel_num = 3
X_NOISE = tf.placeholder(shape=(None, 128, 128, 3), dtype=tf.float32)
X = tf.placeholder(shape=(None, 128, 128, 3), dtype=tf.float32)
LABEL = tf.placeholder(shape=(None, 1000), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 1000), dtype=tf.float32)
model = ResNet128(num_channels=channel_num, num_filters=64)
elif FLAGS.dataset == 'mnist':
dataset = Mnist(rescale=FLAGS.rescale)
test_dataset = dataset
channel_num = 1
X_NOISE = tf.placeholder(shape=(None, 28, 28), dtype=tf.float32)
X = tf.placeholder(shape=(None, 28, 28), dtype=tf.float32)
LABEL = tf.placeholder(shape=(None, 10), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 10), dtype=tf.float32)
model = MnistNet(num_channels=channel_num,
num_filters=FLAGS.num_filters)
elif FLAGS.dataset == 'dsprites':
dataset = DSprites(cond_shape=FLAGS.cond_shape,
cond_size=FLAGS.cond_size,
cond_pos=FLAGS.cond_pos,
cond_rot=FLAGS.cond_rot)
test_dataset = dataset
channel_num = 1
X_NOISE = tf.placeholder(shape=(None, 64, 64), dtype=tf.float32)
X = tf.placeholder(shape=(None, 64, 64), dtype=tf.float32)
if FLAGS.dpos_only:
LABEL = tf.placeholder(shape=(None, 2), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 2), dtype=tf.float32)
elif FLAGS.dsize_only:
LABEL = tf.placeholder(shape=(None, 1), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 1), dtype=tf.float32)
elif FLAGS.drot_only:
LABEL = tf.placeholder(shape=(None, 2), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 2), dtype=tf.float32)
elif FLAGS.cond_size:
LABEL = tf.placeholder(shape=(None, 1), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 1), dtype=tf.float32)
elif FLAGS.cond_shape:
LABEL = tf.placeholder(shape=(None, 3), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 3), dtype=tf.float32)
elif FLAGS.cond_pos:
LABEL = tf.placeholder(shape=(None, 2), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 2), dtype=tf.float32)
elif FLAGS.cond_rot:
LABEL = tf.placeholder(shape=(None, 2), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 2), dtype=tf.float32)
else:
LABEL = tf.placeholder(shape=(None, 3), dtype=tf.float32)
LABEL_POS = tf.placeholder(shape=(None, 3), dtype=tf.float32)
model = DspritesNet(num_channels=channel_num,
num_filters=FLAGS.num_filters,
cond_size=FLAGS.cond_size,
cond_shape=FLAGS.cond_shape,
cond_pos=FLAGS.cond_pos,
cond_rot=FLAGS.cond_rot)
print("Done loading...")
if FLAGS.dataset == "imagenetfull":
# In the case of full imagenet, use custom_tensorflow dataloader
data_loader = TFImagenetLoader('train',
FLAGS.batch_size,
hvd.rank(),
hvd.size(),
rescale=FLAGS.rescale)
else:
data_loader = DataLoader(dataset,
batch_size=FLAGS.batch_size,
num_workers=FLAGS.data_workers,
drop_last=True,
shuffle=True)
batch_size = FLAGS.batch_size
weights = [model.construct_weights('context_0')]
Y = tf.placeholder(shape=(None), dtype=tf.int32)
# Varibles to run in training
X_SPLIT = tf.split(X, FLAGS.num_gpus)
X_NOISE_SPLIT = tf.split(X_NOISE, FLAGS.num_gpus)
LABEL_SPLIT = tf.split(LABEL, FLAGS.num_gpus)
LABEL_POS_SPLIT = tf.split(LABEL_POS, FLAGS.num_gpus)
LABEL_SPLIT_INIT = list(LABEL_SPLIT)
tower_grads = []
tower_gen_grads = []
x_mod_list = []
optimizer = AdamOptimizer(FLAGS.lr, beta1=0.0, beta2=0.999)
optimizer = hvd.DistributedOptimizer(optimizer)
for j in range(FLAGS.num_gpus):
if FLAGS.model_cclass:
ind_batch_size = FLAGS.batch_size // FLAGS.num_gpus
label_tensor = tf.Variable(tf.convert_to_tensor(np.reshape(
np.tile(np.eye(10), (FLAGS.batch_size, 1, 1)),
(FLAGS.batch_size * 10, 10)),
dtype=tf.float32),
trainable=False,
dtype=tf.float32)
x_split = tf.tile(
tf.reshape(X_SPLIT[j], (ind_batch_size, 1, 32, 32, 3)),
(1, 10, 1, 1, 1))
x_split = tf.reshape(x_split, (ind_batch_size * 10, 32, 32, 3))
energy_pos = model.forward(x_split,
weights[0],
label=label_tensor,
stop_at_grad=False)
energy_pos_full = tf.reshape(energy_pos, (ind_batch_size, 10))
energy_partition_est = tf.reduce_logsumexp(energy_pos_full,
axis=1,
keepdims=True)
uniform = tf.random_uniform(tf.shape(energy_pos_full))
label_tensor = tf.argmax(-energy_pos_full -
tf.log(-tf.log(uniform)) -
energy_partition_est,
axis=1)
label = tf.one_hot(label_tensor, 10, dtype=tf.float32)
label = tf.Print(label, [label_tensor, energy_pos_full])
LABEL_SPLIT[j] = label
energy_pos = tf.concat(energy_pos, axis=0)
else:
energy_pos = [
model.forward(X_SPLIT[j],
weights[0],
label=LABEL_POS_SPLIT[j],
stop_at_grad=False)
]
energy_pos = tf.concat(energy_pos, axis=0)
print("Building graph...")
x_mod = x_orig = X_NOISE_SPLIT[j]
x_grads = []
energy_negs = []
loss_energys = []
energy_negs.extend([
model.forward(tf.stop_gradient(x_mod),
weights[0],
label=LABEL_SPLIT[j],
stop_at_grad=False,
reuse=True)
])
eps_begin = tf.zeros(1)
steps = tf.constant(0)
c = lambda i, x: tf.less(i, FLAGS.num_steps)
def langevin_step(counter, x_mod):
x_mod = x_mod + tf.random_normal(
tf.shape(x_mod),
mean=0.0,
stddev=0.005 * FLAGS.rescale * FLAGS.noise_scale)
energy_noise = energy_start = tf.concat([
model.forward(x_mod,
weights[0],
label=LABEL_SPLIT[j],
reuse=True,
stop_at_grad=False,
stop_batch=True)
],
axis=0)
x_grad, label_grad = tf.gradients(FLAGS.temperature * energy_noise,
[x_mod, LABEL_SPLIT[j]])
energy_noise_old = energy_noise
lr = FLAGS.step_lr
if FLAGS.proj_norm != 0.0:
if FLAGS.proj_norm_type == 'l2':
x_grad = tf.clip_by_norm(x_grad, FLAGS.proj_norm)
elif FLAGS.proj_norm_type == 'li':
x_grad = tf.clip_by_value(x_grad, -FLAGS.proj_norm,
FLAGS.proj_norm)
else:
print("Other types of projection are not supported!!!")
assert False
# Clip gradient norm for now
if FLAGS.hmc:
# Step size should be tuned to get around 65% acceptance
def energy(x):
return FLAGS.temperature * \
model.forward(x, weights[0], label=LABEL_SPLIT[j], reuse=True)
x_last = hmc(x_mod, 15., 10, energy)
else:
x_last = x_mod - (lr) * x_grad
x_mod = x_last
x_mod = tf.clip_by_value(x_mod, 0, FLAGS.rescale)
counter = counter + 1
return counter, x_mod
steps, x_mod = tf.while_loop(c, langevin_step, (steps, x_mod))
energy_eval = model.forward(x_mod,
weights[0],
label=LABEL_SPLIT[j],
stop_at_grad=False,
reuse=True)
x_grad = tf.gradients(FLAGS.temperature * energy_eval, [x_mod])[0]
x_grads.append(x_grad)
energy_negs.append(
model.forward(tf.stop_gradient(x_mod),
weights[0],
label=LABEL_SPLIT[j],
stop_at_grad=False,
reuse=True))
test_x_mod = x_mod
temp = FLAGS.temperature
energy_neg = energy_negs[-1]
x_off = tf.reduce_mean(
tf.abs(x_mod[:tf.shape(X_SPLIT[j])[0]] - X_SPLIT[j]))
loss_energy = model.forward(x_mod,
weights[0],
reuse=True,
label=LABEL,
stop_grad=True)
print("Finished processing loop construction ...")
target_vars = {}
if FLAGS.cclass or FLAGS.model_cclass:
label_sum = tf.reduce_sum(LABEL_SPLIT[0], axis=0)
label_prob = label_sum / tf.reduce_sum(label_sum)
label_ent = -tf.reduce_sum(
label_prob * tf.math.log(label_prob + 1e-7))
else:
label_ent = tf.zeros(1)
target_vars['label_ent'] = label_ent
if FLAGS.train:
if FLAGS.objective == 'logsumexp':
pos_term = temp * energy_pos
energy_neg_reduced = (energy_neg - tf.reduce_min(energy_neg))
coeff = tf.stop_gradient(tf.exp(-temp * energy_neg_reduced))
norm_constant = tf.stop_gradient(tf.reduce_sum(coeff)) + 1e-4
pos_loss = tf.reduce_mean(temp * energy_pos)
neg_loss = coeff * (-1 * temp * energy_neg) / norm_constant
loss_ml = FLAGS.ml_coeff * (pos_loss + tf.reduce_sum(neg_loss))
elif FLAGS.objective == 'cd':
pos_loss = tf.reduce_mean(temp * energy_pos)
neg_loss = -tf.reduce_mean(temp * energy_neg)
loss_ml = FLAGS.ml_coeff * (pos_loss + tf.reduce_sum(neg_loss))
elif FLAGS.objective == 'softplus':
loss_ml = FLAGS.ml_coeff * \
tf.nn.softplus(temp * (energy_pos - energy_neg))
loss_total = tf.reduce_mean(loss_ml)
if not FLAGS.zero_kl:
loss_total = loss_total + tf.reduce_mean(loss_energy)
loss_total = loss_total + \
FLAGS.l2_coeff * (tf.reduce_mean(tf.square(energy_pos)) + tf.reduce_mean(tf.square((energy_neg))))
print("Started gradient computation...")
gvs = optimizer.compute_gradients(loss_total)
gvs = [(k, v) for (k, v) in gvs if k is not None]
print("Applying gradients...")
tower_grads.append(gvs)
print("Finished applying gradients.")
target_vars['loss_ml'] = loss_ml
target_vars['total_loss'] = loss_total
target_vars['loss_energy'] = loss_energy
target_vars['weights'] = weights
target_vars['gvs'] = gvs
target_vars['X'] = X
target_vars['Y'] = Y
target_vars['LABEL'] = LABEL
target_vars['LABEL_POS'] = LABEL_POS
target_vars['X_NOISE'] = X_NOISE
target_vars['energy_pos'] = energy_pos
target_vars['energy_start'] = energy_negs[0]
if len(x_grads) >= 1:
target_vars['x_grad'] = x_grads[-1]
target_vars['x_grad_first'] = x_grads[0]
else:
target_vars['x_grad'] = tf.zeros(1)
target_vars['x_grad_first'] = tf.zeros(1)
target_vars['x_mod'] = x_mod
target_vars['x_off'] = x_off
target_vars['temp'] = temp
target_vars['energy_neg'] = energy_neg
target_vars['test_x_mod'] = test_x_mod
target_vars['eps_begin'] = eps_begin
if FLAGS.train:
grads = average_gradients(tower_grads)
train_op = optimizer.apply_gradients(grads)
target_vars['train_op'] = train_op
config = tf.ConfigProto()
if hvd.size() > 1:
config.gpu_options.visible_device_list = str(hvd.local_rank())
sess = tf.Session(config=config)
saver = loader = tf.train.Saver(max_to_keep=30,
keep_checkpoint_every_n_hours=6)
total_parameters = 0
for variable in tf.trainable_variables():
# shape is an array of tf.Dimension
shape = variable.get_shape()
variable_parameters = 1
for dim in shape:
variable_parameters *= dim.value
total_parameters += variable_parameters
print("Model has a total of {} parameters".format(total_parameters))
sess.run(tf.global_variables_initializer())
resume_itr = 0
if (FLAGS.resume_iter != -1 or not FLAGS.train) and hvd.rank() == 0:
model_file = osp.join(logdir, 'model_{}'.format(FLAGS.resume_iter))
resume_itr = FLAGS.resume_iter
# saver.restore(sess, model_file)
optimistic_restore(sess, model_file)
sess.run(hvd.broadcast_global_variables(0))
print("Initializing variables...")
print("Start broadcast")
print("End broadcast")
if FLAGS.train:
print("Training phase")
train(target_vars, saver, sess, logger, data_loader, resume_itr,
logdir)
print("Testing phase")
test(target_vars, saver, sess, logger, data_loader)
def main():
# Initialize dataset
if FLAGS.dataset == 'cifar10':
dataset = Cifar10(train=False, rescale=FLAGS.rescale)
channel_num = 3
dim_input = 32 * 32 * 3
elif FLAGS.dataset == 'imagenet':
dataset = ImagenetClass()
channel_num = 3
dim_input = 64 * 64 * 3
elif FLAGS.dataset == 'mnist':
dataset = Mnist(train=False, rescale=FLAGS.rescale)
channel_num = 1
dim_input = 28 * 28 * 1
elif FLAGS.dataset == 'dsprites':
dataset = DSprites()
channel_num = 1
dim_input = 64 * 64 * 1
elif FLAGS.dataset == '2d' or FLAGS.dataset == 'gauss':
dataset = Box2D()
dim_output = 1
data_loader = DataLoader(dataset,
batch_size=FLAGS.batch_size,
num_workers=FLAGS.data_workers,
drop_last=False,
shuffle=True)
if FLAGS.dataset == 'mnist':
model = MnistNet(num_channels=channel_num)
elif FLAGS.dataset == 'cifar10':
if FLAGS.large_model:
model = ResNet32Large(num_filters=128)
elif FLAGS.wider_model:
model = ResNet32Wider(num_filters=192)
else:
model = ResNet32(num_channels=channel_num, num_filters=128)
elif FLAGS.dataset == 'dsprites':
model = DspritesNet(num_channels=channel_num,
num_filters=FLAGS.num_filters)
weights = model.construct_weights('context_{}'.format(0))
config = tf.ConfigProto()
sess = tf.Session(config=config)
saver = loader = tf.train.Saver(max_to_keep=10)
sess.run(tf.global_variables_initializer())
logdir = osp.join(FLAGS.logdir, FLAGS.exp)
model_file = osp.join(logdir, 'model_{}'.format(FLAGS.resume_iter))
resume_itr = FLAGS.resume_iter
if FLAGS.resume_iter != "-1":
optimistic_restore(sess, model_file)
else:
print("WARNING, YOU ARE NOT LOADING A SAVE FILE")
# saver.restore(sess, model_file)
chain_weights, a_prev, a_new, x, x_init, approx_lr = ancestral_sample(
model, weights, FLAGS.batch_size, temp=FLAGS.temperature)
print("Finished constructing ancestral sample ...................")
if FLAGS.dataset != "gauss":
comb_weights_cum = []
batch_size = tf.shape(x_init)[0]
label_tiled = tf.tile(label_default, (batch_size, 1))
e_compute = -FLAGS.temperature * model.forward(
x_init, weights, label=label_tiled)
e_pos_list = []
for data_corrupt, data, label_gt in tqdm(data_loader):
e_pos = sess.run([e_compute], {x_init: data})[0]
e_pos_list.extend(list(e_pos))
print(len(e_pos_list))
print("Positive sample probability ", np.mean(e_pos_list),
np.std(e_pos_list))
if FLAGS.dataset == "2d":
alr = 0.0045
elif FLAGS.dataset == "gauss":
alr = 0.0085
elif FLAGS.dataset == "mnist":
alr = 0.0065
#90 alr = 0.0035
else:
# alr = 0.0125
if FLAGS.rescale == 8:
alr = 0.0085
else:
alr = 0.0045
#
for i in range(1):
tot_weight = 0
for j in tqdm(range(1, FLAGS.pdist + 1)):
if j == 1:
if FLAGS.dataset == "cifar10":
x_curr = np.random.uniform(0,
FLAGS.rescale,
size=(FLAGS.batch_size, 32, 32,
3))
elif FLAGS.dataset == "gauss":
x_curr = np.random.uniform(0,
FLAGS.rescale,
size=(FLAGS.batch_size,
FLAGS.gauss_dim))
elif FLAGS.dataset == "mnist":
x_curr = np.random.uniform(0,
FLAGS.rescale,
size=(FLAGS.batch_size, 28, 28))
else:
x_curr = np.random.uniform(0,
FLAGS.rescale,
size=(FLAGS.batch_size, 2))
alpha_prev = (j - 1) / FLAGS.pdist
alpha_new = j / FLAGS.pdist
cweight, x_curr = sess.run(
[chain_weights, x], {
a_prev: alpha_prev,
a_new: alpha_new,
x_init: x_curr,
approx_lr: alr * (5**(2.5 * -alpha_prev))
})
tot_weight = tot_weight + cweight
print("Total values of lower value based off forward sampling",
np.mean(tot_weight), np.std(tot_weight))
tot_weight = 0
for j in tqdm(range(FLAGS.pdist, 0, -1)):
alpha_new = (j - 1) / FLAGS.pdist
alpha_prev = j / FLAGS.pdist
cweight, x_curr = sess.run(
[chain_weights, x], {
a_prev: alpha_prev,
a_new: alpha_new,
x_init: x_curr,
approx_lr: alr * (5**(2.5 * -alpha_prev))
})
tot_weight = tot_weight - cweight
print("Total values of upper value based off backward sampling",
np.mean(tot_weight), np.std(tot_weight))
shuffle=True,
batch_size=args.batch_size,
**kwargs)
test_loader = torch.utils.data.DataLoader(datasets.MNIST(
'../../data/mnist/',
train=False,
transform=transforms.Compose([transforms.ToTensor()])),
batch_size=args.batch_size,
shuffle=True,
**kwargs)
if args.embed:
pca = embed_pca(mnist_data, args.embed_dim)
model = MLP(args.embed_dim, 10, 1000, 3).to(device)
else:
model = MnistNet().to(device)
elif args.dataset == 'fashion':
fashion_data = datasets.FashionMNIST('../../data/fashionmnist/',
train=True,
download=True,
transform=transforms.Compose(
[transforms.ToTensor()]))
train_loader = torch.utils.data.DataLoader(fashion_data,
shuffle=True,
batch_size=args.batch_size,
**kwargs)
test_loader = torch.utils.data.DataLoader(datasets.FashionMNIST(
'../../data/fashionmnist/',
train=False,
args = parser.parse_args()
use_cuda = torch.cuda.is_available()
if use_cuda:
torch.cuda.empty_cache()
torch.manual_seed(42)
np.random.seed(42)
device = torch.device("cuda" if use_cuda else "cpu")
kwargs = {'num_workers': 0, 'pin_memory': True} if use_cuda else {}
if args.dataset == 'mnist' or args.dataset == 'fashion_mnist':
transform_train = transforms.Compose([transforms.ToTensor()])
transform_test = transforms.Compose([transforms.ToTensor()])
model = MnistNet(dim=1).to(device)
elif args.dataset == 'gtsrb':
transform_train = transforms.Compose([transforms.ToTensor()])
transform_test = transforms.Compose([transforms.ToTensor()])
model = GTSRBNet(dim=1).to(device)
elif args.dataset == 'cifar10':
transform_train = transforms.Compose([
transforms.RandomCrop(32, padding=4),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
])
transform_test = transforms.Compose([
transforms.ToTensor(),
])
model_names = model_names_dict.get(dataset)
epsilons = epsilons_dict.get(dataset)
for model_name in model_names:
model_path = f'models/{dataset}/{model_name}'
use_cuda = torch.cuda.is_available()
if use_cuda:
torch.cuda.empty_cache()
device = torch.device("cuda" if use_cuda else "cpu")
kwargs = {'num_workers': 0, 'pin_memory': True} if use_cuda else {}
if dataset == 'mnist' or dataset == 'fashion_mnist':
transform_train = transforms.Compose([transforms.ToTensor()])
transform_test = transforms.Compose([transforms.ToTensor()])
model = MnistNet(dim=1).to(device)
elif dataset == 'gtsrb':
transform_train = transforms.Compose([transforms.ToTensor()])
transform_test = transforms.Compose([transforms.ToTensor()])
model = GTSRBNet(dim=1).to(device)
elif dataset == 'cifar10':
transform_train = transforms.Compose([
transforms.RandomCrop(32, padding=4),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
])
transform_test = transforms.Compose([
transforms.ToTensor(),
])