def generate_original_preds(train = True):
"""
Generate the predictions of the original model on training
and validation datasets.
The original model is also trained if train = True.
"""
x_train, y_train, x_val, y_val, id_to_word = load_data()
model = create_original_model()
if train:
filepath="models/original.hdf5"
checkpoint = ModelCheckpoint(filepath, monitor='val_acc',
verbose=1, save_best_only=True, mode='max')
callbacks_list = [checkpoint]
model.fit(x_train, y_train, validation_data=(x_val, y_val),callbacks = callbacks_list, epochs=epochs, batch_size=batch_size)
model.load_weights('./models/original.hdf5',
by_name=True)
pred_train = model.predict(x_train,verbose = 1, batch_size = 1000)
pred_val = model.predict(x_val,verbose = 1, batch_size = 1000)
if not train:
print('The val accuracy is {}'.format(calculate_acc(pred_val,y_val)))
print('The train accuracy is {}'.format(calculate_acc(pred_train,y_train)))
np.save('data/pred_train.npy', pred_train)
np.save('data/pred_val.npy', pred_val)
def simple_pred(params):
all_train_labels = load_data(
os.path.join(params.save_data, "all_train_labels"))
all_train_labels = all_train_labels.reshape((-1))
for ratio in params.ratios:
time_start = time.time()
subset_label = all_train_labels[:int(all_train_labels.shape[0] *
ratio)]
for layer in range(0, 2): ## ATTENTION!!!
concate = []
for j in range(0, 50000, 5000):
a_batch = load_data(
os.path.join(
params.save_data,
"K_transform_batch_layer{}_batch{}".format(
layer, j)))
concate.append(a_batch)
concate = np.concatenate(concate, axis=0)
concate = concate[:int(all_train_labels.shape[0] * ratio)]
# num_PCA_kernels = [80, 125]
mo3 = LAFR()
mo3.fit(concate, subset_label)
prediction = mo3.predict(concate)
save_data(
prediction,
os.path.join(
params.save_data,
"sinple_predict_ratio{}_layer{}".format(ratio, layer)))
calculate_acc(prediction, subset_label)
save_data(
mo3,
os.path.join(
params.save_data,
'simple_pred_layer{}_ratio{}'.format(layer, ratio)))
print("Time cost - simple_pred:", time.time() - time_start)
def generate_post_preds(train = True):
"""
Generate the predictions of the original model on training
and validation datasets.
The original model is also trained if train = True.
"""
x_train, y_train, x_val, y_val = np.load('data/x_train_new_2_loss.npy'),np.load('data/y_train.npy'),np.load('data/x_val_new_2_loss.npy'),np.load('data/y_val.npy')
with open('data/id_to_word.pkl','rb') as f:
id_to_word = pickle.load(f)
model = create_original_model()
if train:
filepath="./models_new/post_2_loss.hdf5"
checkpoint = ModelCheckpoint(filepath, monitor='val_acc',
verbose=1, save_best_only=True, mode='max')
callbacks_list = [checkpoint]
model.fit(x_train, y_train, validation_data=(x_val, y_val),callbacks = callbacks_list, epochs=epochs, batch_size=batch_size)
model.load_weights('./models_new/post_2_loss.hdf5',
by_name=True)
pred_train = model.predict(x_train,verbose = 1, batch_size = 1000)
pred_val = model.predict(x_val,verbose = 1, batch_size = 1000)
if not train:
print('The val accuracy is {}'.format(calculate_acc(pred_val,y_val)))
print('The train accuracy is {}'.format(calculate_acc(pred_train,y_train)))
def train(net, train_loader, optimizer, loss_func):
''' Performs one training epoch of LSTM.
Arguments:
net (nn.Module): RNN (currently LSTM)
train_loader (DataLoader): load object for train data
optimizer: optimizer object for net parameters
loss_func: criterion function used for backprop
Returns:
epoch_loss (torch.float): mean loss value for all
batches
epoch_acc (torch.float): mean acc value for all batches
'''
net.train()
epoch_loss = 0
epoch_acc = 0
for input, labels in train_loader:
input, labels = input.to(device), labels.to(device)
optimizer.zero_grad()
output = net(input).squeeze(1)
loss = loss_func(output, labels)
loss.backward()
optimizer.step()
epoch_loss += loss.item()
epoch_acc += calculate_acc(output, labels)
epoch_loss /= len(train_loader)
epoch_acc /= len(train_loader)
return epoch_loss, epoch_acc
def step(self, batch):
self.model.train()
self.optim.zero_grad()
img, target = batch
img, target = img.cuda(), target.cuda()
#
# Target inputs
try:
inputs_exemplar= next(self.exemplar_iter)
except:
self.exemplar_iter = iter(self.exemplar_dl)
inputs_exemplar = next(self.exemplar_iter)
img_exemplar, target_exemplar = inputs_exemplar
img_exemplar, target_exemplar = img_exemplar.cuda(), target_exemplar.cuda()
# source
img = torch.cat([img,img_exemplar],dim=0)
outputs = self.model(img)
loss = self.loss_func(outputs, target)
#
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def step(self, batch):
self.model.train()
self.optim.zero_grad()
img, target, histlabels = batch
img, target, histlabels = img.cuda(), target.cuda(), histlabels.cuda()
outputs = self.model(img)
loss, tpl, ce, hlce = self.loss_func(outputs,
target,
histlabels,
in_detail=True)
if self.current_iteration % self.cfg.SOLVER.TENSORBOARD.LOG_PERIOD == 0:
if self.summary_writer:
self.summary_writer.add_scalar('Train/tpl', tpl,
self.current_iteration)
self.summary_writer.add_scalar('Train/ce', ce,
self.current_iteration)
self.summary_writer.add_scalar('Train/hlce', hlce,
self.current_iteration)
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq):
iter_counter = 0
loss_list = []
acc_list = []
for input, label in data_iterator(inputs, labels, batch_size):
target = onehot_encoding(label, 10)
iter_counter += 1
# forward net
output = model.forward(input)
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
if iter_counter % disp_freq == 0:
msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (iter_counter, np.mean(loss_list), np.mean(acc_list))
loss_list = []
acc_list = []
LOG_INFO(msg)
def test_net(model, loss, inputs, labels, batch_size, epoch, layer_name):
loss_list = []
acc_list = []
for input, label in data_iterator(inputs,
labels,
batch_size,
shuffle=False):
target = onehot_encoding(label, 10)
output, output_visualize = model.forward(input,
visualize=True,
layer_name=layer_name)
# collapse output_visualize into 1 channel
output_visualize = np.sum(output_visualize, axis=(1))
loss_value = loss.forward(output, target)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
msg = ' Testing, total mean loss %.5f, total acc %.5f' % (
np.mean(loss_list), np.mean(acc_list))
LOG_INFO(msg)
# save weights and biases
model.save_weights(loss.name, epoch)
return np.mean(loss_list), np.mean(
acc_list
), output_visualize # output_visualize: batch_size x height x width
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq):
iter_counter = 0
loss_list = []
acc_list = []
for input, label in data_iterator(inputs, labels, batch_size):
target = onehot_encoding(label, 10)
iter_counter += 1
# forward net
output = model.forward(input)
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
if iter_counter % disp_freq == 0:
msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (
iter_counter, np.mean(loss_list), np.mean(acc_list))
loss_list = []
acc_list = []
LOG_INFO(msg)
def evaluate(net, set_loader, loss_func):
''' Evaluates the performance of the RNN
on the given set.
Arguments:
net (nn.Module): RNN (currently LSTM)
set_loader (DataLoader): load object for val/test data
loss_func: criterion function used for backprop
Returns:
eval_loss (torch.float): mean loss value for all
batches
eval_acc (torch.float): mean acc value for all batches
'''
net.eval()
eval_loss = 0
eval_acc = 0
for input, labels in set_loader:
input, labels = input.to(device), labels.to(device)
output = net(input).squeeze(1)
loss = loss_func(output, labels)
eval_loss += loss.item()
eval_acc += calculate_acc(output, labels)
eval_loss /= len(set_loader)
eval_acc /= len(set_loader)
return eval_loss, eval_acc
def step(self, batch):
self.model.train()
self.optim.zero_grad()
#
img, target = batch
img, target = img.cuda(), target.cuda()
outputs = self.model(img)
#
if self.cfg.SOLVER.MIXUP.USE:
mx_img, mx_target1, mx_target2, lamb = self.posneg_mixup(
img, target, self.cfg.DATALOADER.NUM_INSTANCE,
self.cfg.SOLVER.MIXUP.NEG_INSTANCE,
self.cfg.SOLVER.MIXUP.ALPHA)
mx_outputs = self.model(mx_img)
loss = self.loss_func(outputs, target, mx_outputs, mx_target1,
mx_target2, lamb)
else:
loss = self.loss_func(outputs, target)
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def test_net(model, loss, inputs, labels, batch_size):
acc_value = 0.0
count = 0
for input, label in data_iterator(inputs, labels, batch_size, shuffle=False):
output = model.forward(input)
acc_value += calculate_acc(output, label)
count += 1
return acc_value / count
def test_net(model, loss, input_feats, labels, test_mask, label_kind):
target = onehot_encoding(labels, label_kind)
output = model.forward(input_feats)
# set mask
output[~test_mask] = target[~test_mask]
loss_value = loss.forward(output, target)
acc_value = calculate_acc(output, labels, np.sum(test_mask))
msg = ' Testing, total mean loss %.5f, total acc %.5f' % (loss_value,
acc_value)
LOG_INFO(msg)
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq, Loss,
Acur):
iter_counter = 0
loss_list = []
acc_list = []
ll = []
ac = []
for input, label in data_iterator(inputs, labels, batch_size):
target = onehot_encoding(label, 10)
iter_counter += 1
# forward net
output = model.forward(input)
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
if loss_value > 1:
config['learning_rate'] = 0.2
elif loss_value > 0.5:
config['learning_rate'] = 0.1
elif loss_value > 0.2:
config['learning_rate'] = 0.05
else:
config['learning_rate'] = max(loss_value / 5.0, 0.005)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
ll.append(loss_value)
ac.append(acc_value)
if iter_counter % disp_freq == 0:
msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (
iter_counter, np.mean(loss_list), np.mean(acc_list))
Loss.append(np.mean(loss_list))
Acur.append(np.mean(acc_list))
loss_list = []
acc_list = []
LOG_INFO(msg)
Loss.append(np.mean(ll))
Acur.append(np.mean(ac))
def test_net(model, loss, inputs, labels, batch_size):
loss_list = []
acc_list = []
for input, label in data_iterator(inputs, labels, batch_size, shuffle=False):
target = onehot_encoding(label, 10)
output = model.forward(input)
loss_value = loss.forward(output, target)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
msg = ' Testing, total mean loss %.5f, total acc %.5f' % (np.mean(loss_list), np.mean(acc_list))
LOG_INFO(msg)
def test_net(model, loss, inputs, labels, batch_size):
loss_list = []
acc_list = []
for input, label in data_iterator(inputs, labels, batch_size, shuffle=False):
target = onehot_encoding(label, 10)
output = model.forward(input)
loss_value = loss.forward(output, target)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
msg = ' Testing, total mean loss %.5f, total acc %.5f' % (np.mean(loss_list), np.mean(acc_list))
LOG_INFO(msg)
def step(self, batch):
self.model.train()
self.optim.zero_grad()
self.center_optim.zero_grad()
img, target = batch
img, target = img.cuda(), target.cuda()
if self.cfg.MODEL.USE_COS:
outputs = self.model(img, target)
else:
outputs = self.model(img)
loss, tpl, ce, ct = self.loss_func(outputs, target, in_detail=True)
if self.current_iteration % self.cfg.SOLVER.TENSORBOARD.LOG_PERIOD == 0:
if self.summary_writer:
self.summary_writer.add_scalar('Train/tpl', tpl,
self.current_iteration)
self.summary_writer.add_scalar('Train/ce', ce,
self.current_iteration)
self.summary_writer.add_scalar('Train/ct', ct,
self.current_iteration)
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
if self.mix_precision:
# [todo] fix the center's step
pass
# for param in amp.master_params(self.center_optim):
# param.grad.data *= (0.5 / self.cfg.SOLVER.CENTER_LOSS.WEIGHT)
else:
for param in self.loss_func.center_criterion.parameters():
# param.grad.data *= (1.0 / self.cfg.SOLVER.CENTER_LOSS.WEIGHT)
param.grad.data *= (self.cfg.SOLVER.CENTER_LOSS.ALPHA /
self.cfg.SOLVER.CENTER_LOSS.WEIGHT)
self.center_optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq,
test_inputs, test_labels):
iter_counter = 0
train_loss_list, train_acc_list = [], []
test_loss_list, test_acc_list = [], []
# loss_list, acc_list = [], []
for input, label in data_iterator(inputs, labels, batch_size):
# train_loss_value, train_acc_value = test_net(model, loss, input, labels, 10000000)
# train_loss_list.append(train_loss_value)
# train_acc_list.append(train_acc_value)
test_loss_value, test_acc_value = test_net(model, loss, test_inputs,
test_labels, 10000000)
test_loss_list.append(test_loss_value)
test_acc_list.append(test_acc_value)
target = onehot_encoding(label, 10)
iter_counter += 1
# forward net
output = model.forward(input)
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, label)
# loss_list.append(loss_value)
# acc_list.append(acc_value)
train_loss_list.append(loss_value)
train_acc_list.append(acc_value)
# if iter_counter % disp_freq == 0:
# msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (iter_counter, np.mean(loss_list), np.mean(acc_list))
# loss_list = []
# acc_list = []
# LOG_INFO(msg)
return train_loss_list, train_acc_list, test_loss_list, test_acc_list
def test_net(model, loss, inputs, labels, batch_size):
loss_list = []
acc_list = []
# test model with all the test data
for input, label in data_iterator(inputs, labels, batch_size, shuffle=False):
# get the expected value of this batch of input
target = onehot_encoding(label, 10)
output = model.forward(input)
# calculate loss of this batch
loss_value = loss.forward(output, target)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
# use the mean of all batch's loss and accuracy as the final result
msg = ' Testing, total mean loss %.5f, total acc %.5f' % (np.mean(loss_list), np.mean(acc_list))
LOG_INFO(msg)
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq, loss_file):
iter_counter = 0
loss_list = []
acc_list = []
for input, label in data_iterator(inputs, labels, batch_size):
target = onehot_encoding(label, 10)
iter_counter += 1
# print "Debug: ", "input=", input.shape, " target=", target.shape
# forward net
output = model.forward(input)
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
acc_list.append(acc_value)
'''
outf = file(loss_file, "a")
outf.write(str(loss_value) + ' ' + str(acc_value) + '\n')
outf.close()
'''
if iter_counter % disp_freq == 0:
msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (iter_counter, np.mean(loss_list), np.mean(acc_list))
outf = file(loss_file, "a")
outf.write(str(np.mean(loss_list)) + ' ' + str(np.mean(acc_list)) + '\n')
outf.close()
loss_list = []
acc_list = []
LOG_INFO(msg)
def step(self, batch):
self.model.train()
self.optim.zero_grad()
img, target = batch
img, target = img.cuda(), target.cuda()
#
# Target inputs
try:
inputs_exemplar = next(self.exemplar_iter)
except:
self.exemplar_iter = iter(self.exemplar_dl)
inputs_exemplar = next(self.exemplar_iter)
img_exemplar, target_exemplar = inputs_exemplar
img_exemplar, target_exemplar = img_exemplar.cuda(
), target_exemplar.cuda()
# source
outputs = self.model(img)
loss = self.loss_func(outputs, target)
#
exemplar_outputs = self.model(img_exemplar, 'exemplar_feat')
loss_un = self.exemplar_memory(exemplar_outputs,
target_exemplar,
epoch=self.train_epoch)
loss = (1 - self.cfg.DATASETS.EXEMPLAR.MEMORY.LAMBDA
) * loss + self.cfg.DATASETS.EXEMPLAR.MEMORY.LAMBDA * loss_un
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def train_net(model, loss, config, inputs, labels, batch_size, disp_freq, Loss, Acur):
iter_counter = 0
loss_list = []
acc_list = []
ll = []
ac = []
# train model with
for input, label in data_iterator(inputs, labels, batch_size):
target = onehot_encoding(label, 10)
iter_counter += 1
# forward net
output = model.forward(input)
# calculate loss value of the whole batch
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss, this is actually the local gradient contribution of the output layer
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights: recount after the whole backward procedure
model.update(config)
acc_value = calculate_acc(output, label)
loss_list.append(loss_value)
ll.append(loss_value)
acc_list.append(acc_value)
ac.append(acc_value)
if iter_counter % disp_freq == 0:
msg = ' Training iter %d, batch loss %.4f, batch acc %.4f' % (iter_counter, np.mean(loss_list), np.mean(acc_list))
loss_list = []
acc_list = []
LOG_INFO(msg)
Loss.append(np.mean(ll))
Acur.append(np.mean(ac))
def train_net(model, loss, config, input_feats, labels, train_mask,
label_kind):
target = onehot_encoding(labels, label_kind)
# forward net
output = model.forward(input_feats)
# set mask
output[~train_mask] = target[~train_mask]
# calculate loss
loss_value = loss.forward(output, target)
# generate gradient w.r.t loss
grad = loss.backward(output, target)
# backward gradient
model.backward(grad)
# update layers' weights
model.update(config)
acc_value = calculate_acc(output, labels, np.sum(train_mask))
msg = ' Training batch loss %.4f, batch acc %.4f' % (loss_value,
acc_value)
LOG_INFO(msg)
def step(self, batch):
self.model.train()
self.optim.zero_grad()
img, target = batch
img, target = img.cuda(), target.cuda()
outputs = self.model(img)
loss = self.loss_func(outputs, target)
if self.mix_precision:
with amp.scale_loss(loss, self.optim) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.optim.step()
# acc = (score.max(1)[1] == target).float().mean()
acc = calculate_acc(self.cfg, outputs, target)
self.loss_avg.update(loss.cpu().item())
self.acc_avg.update(acc.cpu().item())
return self.loss_avg.avg, self.acc_avg.avg
def main(cfg):
# setting up output directories, and writing to stdout
make_dirs(cfg.stdout_dir, replace=False)
if cfg.train:
run_type = 'train'
else:
if 'weight' in cfg.prune_type.lower():
run_type = 'weight-prune'
else:
run_type = 'unit-prune'
sys.stdout = open(
'{}/stdout_{}_{}.txt'.format(cfg.stdout_dir, cfg.model_name, run_type),
'w')
print(cfg)
print('\n')
sys.stdout.flush()
# if train mode, replace the previous plot and ckpt directories; if in prune mode, use existing directories
if cfg.plot:
make_dirs(os.path.join(cfg.plot_dir, cfg.model_name),
replace=cfg.train)
if cfg.save_model:
make_dirs(os.path.join(cfg.model_dir, cfg.model_name),
replace=cfg.train)
# set random seed
if cfg.random_seed != 0:
random_seed = cfg.random_seed
else:
random_seed = random.randint(1, 100000)
random.seed(random_seed)
np.random.seed(random_seed)
torch.manual_seed(random_seed)
# set device as cuda or cpu
if cfg.use_gpu and torch.cuda.is_available():
# reproducibility using cuda
torch.cuda.manual_seed(random_seed)
cudnn.deterministic = True
cudnn.benchmark = False
device = torch.device('cuda')
else:
device = torch.device('cpu')
if cfg.use_gpu:
print('gpu option was to <True>, but no cuda device was found')
print('\n')
# datasets and dataloaders
# normalizing training and validation images to [0, 1] suffices for the purposes of our research objective
# in training, <drop_last> minibatch in an epoch set to <True> for simplicity in tracking training performance
dataset_train = MNIST(root='./data/mnist',
train=True,
download=True,
transform=transforms.Compose([transforms.ToTensor()
]),
target_transform=None)
dataloader_train = DataLoader(dataset=dataset_train,
batch_size=cfg.batch_size,
shuffle=cfg.shuffle,
num_workers=cfg.num_workers,
pin_memory=True,
drop_last=True)
dataset_val = MNIST(root='./data/mnist',
train=False,
download=True,
transform=transforms.Compose([transforms.ToTensor()]),
target_transform=None)
dataloader_val = DataLoader(dataset=dataset_val,
batch_size=100,
shuffle=False,
num_workers=cfg.num_workers,
pin_memory=True,
drop_last=False)
# automatically compute number of classes
targets = np.asarray(dataset_train.targets)
c = np.unique(targets).shape[0]
# define model
# weights initialized using Kaiming uniform (He initialization)
# number of units per hidden layer is passed in as an argument
net = Net(np.product(cfg.img_size), c, cfg.units).to(device)
criterion = nn.CrossEntropyLoss()
if cfg.train:
# training mode
if cfg.use_sgd:
optimizer = optim.SGD(params=net.parameters(),
lr=cfg.lr,
momentum=cfg.momentum,
nesterov=cfg.use_nesterov)
else:
optimizer = optim.Adam(params=net.parameters(),
lr=cfg.lr,
betas=(cfg.beta1, cfg.beta2))
# tracking training and validation stats over epochs
epochs = []
train_loss_epochs, val_loss_epochs = [], []
train_acc_epochs, val_acc_epochs = [], []
# best model is defined as model with best performing validation loss
best_loss = float('inf')
for epoch in range(cfg.epochs):
# tracking training and validation stats over a given epoch
train_loss_epoch, val_loss_epoch = [], []
train_acc_epoch, val_acc_epoch = [], []
# training set
for i, (x, y) in enumerate(dataloader_train):
x, y = x.to(device), y.to(device)
optimizer.zero_grad()
logits = net(x)
loss = criterion(logits, y)
loss.backward()
optimizer.step()
acc = calculate_acc(logits, y)
append((train_loss_epoch, loss.item()),
(train_acc_epoch, acc.item()))
# validation set
with torch.no_grad():
for i, (x, y) in enumerate(dataloader_val):
x, y = x.to(device), y.to(device)
logits = net(x)
loss = criterion(logits, y)
acc = calculate_acc(logits, y)
append((val_loss_epoch, loss.item()),
(val_acc_epoch, acc.item()))
train_loss_epoch, val_loss_epoch = get_average(
train_loss_epoch), get_average(val_loss_epoch)
train_acc_epoch, val_acc_epoch = get_average(
train_acc_epoch), get_average(val_acc_epoch)
print('train_epoch{:0=3d}_loss{:.4f}_acc{:.4f}'.format(
epoch + 1, train_loss_epoch, train_acc_epoch))
print('valid_epoch{:0=3d}_loss{:.4f}_acc{:.4f}'.format(
epoch + 1, val_loss_epoch, val_acc_epoch))
print('\n')
sys.stdout.flush()
if cfg.plot:
append((epochs, epoch + 1),
(train_loss_epochs, train_loss_epoch),
(val_loss_epochs, val_loss_epoch),
(train_acc_epochs, train_acc_epoch),
(val_acc_epochs, val_acc_epoch))
plot_line(epochs, train_loss_epochs, val_loss_epochs,
'Epoch Number', 'Loss', cfg)
plot_line(epochs, train_acc_epochs, val_acc_epochs,
'Epoch Number', 'Accuracy', cfg)
if val_loss_epoch < best_loss:
best_loss = val_loss_epoch
print('New best model at epoch {:0=3d} with val_loss {:.4f}'.
format(epoch + 1, best_loss))
print('\n')
if cfg.save_model:
# save model when validation loss improves
save_name = '{}_net_epoch{:0=3d}_val_loss{:.4f}'.format(
cfg.model_name, epoch + 1, best_loss)
torch.save(
net.state_dict(),
os.path.join(cfg.model_dir, cfg.model_name,
'{}.pth'.format(save_name)))
with open(
os.path.join(cfg.model_dir, cfg.model_name,
'{}.txt'.format(cfg.model_name)),
'w') as file:
file.write('{}.pth'.format(save_name))
else:
# pruning mode
# checks on arguments passed in
for k in cfg.sparsity:
assert 0 <= k <= 1
if cfg.use_sparse_mul:
assert cfg.to_sparse
# load model
with open(
os.path.join(cfg.model_dir, cfg.model_name,
'{}.txt'.format(cfg.model_name)), 'r') as file:
load_name = file.readline()
net.load_state_dict(
torch.load(
os.path.join(cfg.model_dir, cfg.model_name,
'{}'.format(load_name))))
net.eval()
# select pruning approach to use
if 'weight' in cfg.prune_type.lower():
prune = weight_prune
else:
prune = unit_prune
sparsities = []
val_loss_sparse, val_acc_sparse = [], []
time_sparsities = []
for k in cfg.sparsity:
val_loss_k, val_acc_k = [], []
time_k = []
# copy network so that the sparsity changes are not additive for each k
net_sparse = copy.deepcopy(net)
pruned_weights = []
# prune model, except for the last layer
for (i, p) in enumerate(net_sparse.parameters()):
if i < len(cfg.units):
original_weights = copy.deepcopy(p.data)
if cfg.plot:
# plot magnitude of original weights (for comparison to post-pruned weights)
plot_hist([
torch.abs(
original_weights.flatten()).cpu().numpy()
], ['b'], cfg.prune_type, i + 1, k,
'Non-Pruned Weight Magnitudes', 'Counts',
cfg)
prune(p.data, k)
if cfg.plot:
# plot original magnitudes of pruned weights, and magnitudes of remaining weights, separately
pruned_weights_non_zero = torch.abs(
original_weights.flatten()[p.data.flatten() != 0])
pruned_weights_zeroed = torch.abs(
original_weights.flatten()[p.data.flatten() == 0])
plot_hist([
pruned_weights_non_zero.cpu().numpy(),
pruned_weights_zeroed.cpu().numpy()
], ['g', 'r'], cfg.prune_type, i + 1, k,
'Weight Magnitudes', 'Counts', cfg)
plot_hist([pruned_weights_non_zero.cpu().numpy()],
['k'], cfg.prune_type, i + 1, k,
'Surviving Weight Magnitudes', 'Counts', cfg)
if cfg.to_sparse and i < len(cfg.units):
pruned_weights.append(p.data.to_sparse())
else:
pruned_weights.append(p.data)
with torch.no_grad():
for i, (x, y) in enumerate(dataloader_val):
x, y = x.to(device), y.to(device)
start = time.time()
logits = forward(x, pruned_weights, cfg.use_sparse_mul)
end = time.time()
loss = criterion(logits, y)
acc = calculate_acc(logits, y)
append((val_loss_k, loss.item()), (val_acc_k, acc.item()),
(time_k, end - start))
val_loss_k, val_acc_k, time_k = get_average(
val_loss_k), get_average(val_acc_k), get_average(time_k)
print('valid_{}_k{:.2f}_loss{:.4f}_acc{:.4f}'.format(
run_type, k, val_loss_k, val_acc_k))
print('valid_{}_k{:.2f}_time/minibatch{:.6f}'.format(
run_type, k, time_k))
print('\n')
sys.stdout.flush()
if cfg.plot:
append((sparsities, k), (val_loss_sparse, val_loss_k),
(val_acc_sparse, val_acc_k), (time_sparsities, time_k))
plot_line(sparsities, [], val_loss_sparse,
'Sparsity {} Prune'.format(cfg.prune_type), 'Loss',
cfg)
plot_line(sparsities, [], val_acc_sparse,
'Sparsity {} Prune'.format(cfg.prune_type),
'Accuracy', cfg)
plot_line(sparsities, [], time_sparsities,
'Sparsity {} Prune'.format(cfg.prune_type), 'Time',
cfg)
if cfg.save_model:
torch.save(
net_sparse.state_dict(),
os.path.join(
cfg.model_dir, cfg.model_name,
'{}_sparse_net_{}_val_loss{:.4f}.pth'.format(
cfg.model_name, run_type, val_loss_k)))
test_outputs = rnn_model(test_x)
elif 'gru' in args.rnn_model_type:
test_outputs, _, _ = rnn_model(test_x)
elif 'lstm' in args.rnn_model_type:
test_outputs, _, _ = rnn_model(test_x)
test_outputs = test_outputs.view(
test_x.size(1), num_class)
if use_loss_weights:
test_loss = rnn_loss_function(
test_outputs, test_labels, weight=loss_weights)
else:
test_loss = rnn_loss_function(
test_outputs, test_labels)
test_average_loss += test_loss.item()
curr_correct, curr_total, corr_labels, incorr_labels = calculate_acc(
test_outputs, test_labels)
correct_labels.extend(corr_labels.tolist())
incorrect_labels.extend(incorr_labels.tolist())
total += curr_total
correct += curr_correct
_ = print_per_label_accu(Counter(correct_labels), Counter(
incorrect_labels), test_state_map)
test_average_loss /= len(test_loader)
accuracy = float(correct) / total
print('[INFO][Test] Testing loss: {}. Overall testing accuracy: {}'.format(
test_average_loss, accuracy))
rnn_model.train() # Now returning to train model
else:
rnn_model = torch.load(args.rnn_model).to(device)
for layer in range(0, 2): ## ATTENTION!!!
K_transform = load_data(os.path.join(params.save_data, "K_transform_layer{}".format(layer)))
batch_size = 5000
con = []
for b in range(0, ph_out[0].shape[0], batch_size):
data = ph_out[layer][b: b + batch_size]
data = K_transform.predict(data)
# mean1 = np.mean(data, axis=1, keepdims=True)
# data = mean1 - data
# data = np.where(data < 0, 0, data)
# data = np.sum(data, axis=1)
con.append(data)
con = np.concatenate(con, axis=0)
mo3 = load_data(os.path.join(params.save_data, 'simple_pred_layer{}_ratio{}'.format(layer, ratio)))
prediction = mo3.predict(con)
calculate_acc(prediction, test_labels)
concate.append(prediction)
for layer in range(2, params.num_layers): ## ATTENTION!!!
data = ph_out[layer]
data = np.reshape(data, newshape=(data.shape[0], -1))
lag = load_data(os.path.join(params.save_data, 'LAG_{}_{}'.format(layer, ratio)))
lag_pred = lag.predict_proba(data)
concate.append(lag_pred)
concate = np.concatenate(concate, axis=1)
print("Concate shape:", concate.shape)
rf = load_data(os.path.join(params.save_data, 'RF_{}'.format(ratio)))
prediction = rf.predict(concate)
# calculate_acc(prediction, subset_label)
print("ACC=", np.sum(prediction.reshape((-1)) == test_labels.reshape((-1))) / test_labels.shape[0] * 100)
def cross_validation(k, X, y, params, regression):
"""
Performing regression using K-Cross Validation.
This function is used to generate a model, given data, a regression function
and a set of parameters.
Args:
k (int): k for cross validation
X (nd.array): training samples of form N x D
y (nd.array): training samples of form N
params (dict): dictionary of training samples
regression (function): regression function
Returns:
float: mean loss on validation datasets
float: mean accuracy on validation datasets
Raise:
ValueError: if the regression function raises an error
"""
# Cross-validation
k_indices = build_k_indices(y, k)
accuracies = []
losses = []
# print(f"(max_iters: {params['max_iters']}, gamma: {params['gamma']}, lambda: {params['lambda_']})")
# each iteration for each split of training and validation
for k_iteration in range(k):
# split the data accordingly into training and validation
X_train, Y_train, X_val, Y_val = cross_validation_iter(
y, X, k_indices, k_iteration)
# initial weights
W_init = np.random.rand(D, )
# initialize dictionary for the training regression model
args_train = {
"tx": X_train,
"y": Y_train,
"initial_w": W_init,
"max_iters": params["max_iters"],
"gamma": params["gamma"],
"lambda_": params["lambda_"]
}
# try to train the model, if this doesnt work, raise an error
try:
W, loss_tr = regression(**args_train)
except ValueError:
print("Regression diverged with these parameters.")
return None, None
if "Logistic" in f_name:
prediction_val_regression = sigmoid(X_val @ W)
else:
prediction_val_regression = X_val @ W
# calculate prediction for the validation dataset
prediction_val = create_labels(prediction_val_regression)
# calculate corresponding loss and accuracy
loss_val = calculate_mse_loss(Y_val, prediction_val)
acc_val = calculate_acc(Y_val, prediction_val)
losses.append(loss_val)
accuracies.append(acc_val)
# finally, generate the means
mean_loss_val = np.array(losses).mean()
mean_acc_val = np.array(accuracies).mean()
return mean_loss_val, mean_acc_val
# validation_loss = 0.0
# for j, data in enumerate(testloader): # (10,000 / args.batch) batches
# inputs, labels = data
# inputs = inputs.to(device)
# labels = labels.to(device)
# outputs = net(inputs)
# loss = criterion(outputs, labels)
# validation_loss += loss.item()
# Calculate training accuracy, top-1
# train_acc = calculate_acc(trainloader, net, device)
# Calculate validation accuracy
net.eval()
val_acc = calculate_acc(testloader, net, device)
if val_acc > stats['best_acc']:
stats['best_acc'] = val_acc
stats['best_epoch'] = epoch + 1
if args.save:
# Save the checkpoint
state = {
'epoch': epoch,
'optimizer': optimizer.state_dict(),
'net': net.state_dict(),
'stats': stats
}
torch.save(state, checkpoint_path)
# Switch back to training mode
net.train()
def event_tagger():
# Read event data
en_train = read_event_data('en/train.txt')
en_dev = read_event_data('en/dev.txt')
en_test = read_event_data('en/test.txt')
it_train = read_event_data('it/train.txt')
it_dev = read_event_data('it/dev.txt')
it_test = read_event_data('it/test.txt')
print('English TimeML:', len(en_train), len(en_dev), len(en_test))
print('Italian News:', len(it_train), len(it_dev), len(it_test))
tags = list(set(word_label[1] for sent in it_train for word_label in sent))
print(len(tags))
# By convention, the 0'th slot is reserved for padding.
tags = ["<pad>"] + tags
tag2idx = {tag: idx for idx, tag in enumerate(tags)}
idx2tag = {idx: tag for idx, tag in enumerate(tags)}
print(tag2idx)
print(idx2tag)
device = 'cuda' if torch.cuda.is_available() else 'cpu'
tokenizer = BertTokenizer.from_pretrained('bert-base-multilingual-cased',
do_lower_case=False)
model = Net(vocab_size=len(tag2idx), device=device)
model.to(device)
model = nn.DataParallel(model)
# One fine-tuning step
train_dataset = EventDataset(en_train, tokenizer, tag2idx)
train_iter = data.DataLoader(dataset=train_dataset,
batch_size=8,
shuffle=True,
num_workers=1,
collate_fn=pad)
eval_dataset = EventDataset(it_test, tokenizer, tag2idx)
test_iter = data.DataLoader(dataset=eval_dataset,
batch_size=8,
shuffle=False,
num_workers=1,
collate_fn=pad)
criterion = nn.CrossEntropyLoss(ignore_index=0)
num_epoch = 1
base_lr = 0.001
decay_factor = 0.2
discriminative_fine_tuning = True
gradual_unfreezing = False
# params order top to bottom
group_to_discriminate = ['classifier', 'bert']
no_decay = ['bias', 'LayerNorm.weight']
if discriminative_fine_tuning:
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay) and not 'bert' in n
],
'layers': [
n for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay) and not 'bert' in n
],
'lr':
0.001,
'name':
'classifier.decay',
'weight_decay':
0.01
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay) and not 'bert' in n
],
'layers': [
n for n, p in model.named_parameters()
if any(nd in n for nd in no_decay) and not 'bert' in n
],
'lr':
0.001,
'name':
'classifier.no_decay',
'weight_decay':
0.0
}, {
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay) and 'bert' in n
],
'layers': [
n for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay) and 'bert' in n
],
'lr':
0.00002,
'name':
'bert.decay',
'weight_decay':
0.01
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay) and 'bert' in n
],
'layers': [
n for n, p in model.named_parameters()
if any(nd in n for nd in no_decay) and 'bert' in n
],
'lr':
0.00002,
'name':
'bert.no_decay',
'weight_decay':
0.0
}]
else:
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=len(train_iter) *
num_epoch // 10,
t_total=len(train_iter) * num_epoch)
for e in range(num_epoch):
unfreeze = (True, False)[e != 0]
if discriminative_fine_tuning and gradual_unfreezing:
for pg in optimizer.param_groups:
layers = ''
for layer in pg['layers']:
layers += layer + ';'
# print('epoch: {}, Layers: {}'.format(e, layers))
if 'bert' in pg['name']:
for param in pg['params']:
param.requires_grad = unfreeze
loss = train(model, train_iter, optimizer, scheduler, criterion)
acc = eval(model, test_iter, idx2tag)
print("epoch: {}, loss: {}".format(e, loss))
print("epoch: {}, acc: {}".format(e, acc))
'''
## Second fine-tuning step (epoch=1)
train_dataset = EventDataset(it_train, tokenizer, tag2idx)
for e in range(num_epoch):
unfreeze = (True, False)[e != 0]
if discriminative_fine_tuning and gradual_unfreezing:
for pg in optimizer.param_groups:
layers = ''
for layer in pg['layers']:
layers += layer + ';'
# print('epoch: {}, Layers: {}'.format(e, layers))
if 'bert' in pg['name']:
for param in pg['params']:
param.requires_grad = unfreeze
loss = train(model, train_iter, optimizer, scheduler, criterion)
acc = eval(model, test_iter, idx2tag)
print("epoch: {}, loss: {}".format(e, loss))
print("epoch: {}, acc: {}".format(e, acc))
'''
calculate_acc()
calculate_f1()
