def get_model_optimizer_scheduler(args, device, test_loader, criterion):
if args.model == 'LeNet':
model = LeNet().to(device)
elif args.model == 'vgg16':
model = VGG(depth=16).to(device)
elif args.model == 'vgg19':
model = VGG(depth=19).to(device)
else:
raise ValueError("model not recognized")
# In this example, we set the architecture of teacher and student to be the same. It is feasible to set a different teacher architecture.
if args.teacher_model_dir is None:
raise NotImplementedError('please load pretrained teacher model first')
else:
model.load_state_dict(torch.load(args.teacher_model_dir))
best_acc = test(args, model, device, criterion, test_loader)
model_t = deepcopy(model)
model_s = deepcopy(model)
if args.student_model_dir is not None:
# load the pruned student model checkpoint
model_s.load_state_dict(torch.load(args.student_model_dir))
dummy_input = get_dummy_input(args, device)
m_speedup = ModelSpeedup(model_s, dummy_input, args.mask_path, device)
m_speedup.speedup_model()
module_list = nn.ModuleList([])
module_list.append(model_s)
module_list.append(model_t)
# setup opotimizer for fine-tuning studeng model
optimizer = torch.optim.SGD(model_s.parameters(),
lr=0.01,
momentum=0.9,
weight_decay=5e-4)
scheduler = MultiStepLR(optimizer,
milestones=[
int(args.fine_tune_epochs * 0.5),
int(args.fine_tune_epochs * 0.75)
],
gamma=0.1)
print('Pretrained teacher model acc:', best_acc)
return module_list, optimizer, scheduler
def model_inference(config):
masks_file = config['masks_file']
device = torch.device(
'cuda') if torch.cuda.is_available() else torch.device('cpu')
# device = torch.device(config['device'])
if config['model_name'] == 'vgg16':
model = VGG(depth=16)
elif config['model_name'] == 'vgg19':
model = VGG(depth=19)
elif config['model_name'] == 'lenet':
model = LeNet()
model.to(device)
model.eval()
dummy_input = torch.randn(config['input_shape']).to(device)
use_mask_out = use_speedup_out = None
# must run use_mask before use_speedup because use_speedup modify the model
if use_mask:
apply_compression_results(model, masks_file, device)
start = time.time()
for _ in range(32):
use_mask_out = model(dummy_input)
print('elapsed time when use mask: ', time.time() - start)
if use_speedup:
m_speedup = ModelSpeedup(model, dummy_input, masks_file, device)
m_speedup.speedup_model()
start = time.time()
for _ in range(32):
use_speedup_out = model(dummy_input)
print('elapsed time when use speedup: ', time.time() - start)
if compare_results:
if torch.allclose(use_mask_out, use_speedup_out, atol=1e-07):
print('the outputs from use_mask and use_speedup are the same')
else:
raise RuntimeError(
'the outputs from use_mask and use_speedup are different')
def get_model_optimizer_scheduler(args, device, train_loader, test_loader,
criterion):
if args.model == 'lenet':
model = LeNet().to(device)
if args.pretrained_model_dir is None:
optimizer = torch.optim.Adadelta(model.parameters(), lr=1)
scheduler = StepLR(optimizer, step_size=1, gamma=0.7)
elif args.model == 'vgg16':
model = VGG(depth=16).to(device)
if args.pretrained_model_dir is None:
optimizer = torch.optim.SGD(model.parameters(),
lr=0.1,
momentum=0.9,
weight_decay=5e-4)
scheduler = MultiStepLR(optimizer,
milestones=[
int(args.pretrain_epochs * 0.5),
int(args.pretrain_epochs * 0.75)
],
gamma=0.1)
elif args.model == 'vgg19':
model = VGG(depth=19).to(device)
if args.pretrained_model_dir is None:
optimizer = torch.optim.SGD(model.parameters(),
lr=0.1,
momentum=0.9,
weight_decay=5e-4)
scheduler = MultiStepLR(optimizer,
milestones=[
int(args.pretrain_epochs * 0.5),
int(args.pretrain_epochs * 0.75)
],
gamma=0.1)
else:
raise ValueError("model not recognized")
if args.pretrained_model_dir is None:
print('start pre-training...')
best_acc = 0
for epoch in range(args.pretrain_epochs):
train(args, model, device, train_loader, criterion, optimizer,
epoch)
scheduler.step()
acc = test(args, model, device, criterion, test_loader)
if acc > best_acc:
best_acc = acc
state_dict = model.state_dict()
model.load_state_dict(state_dict)
acc = best_acc
torch.save(
state_dict,
os.path.join(args.experiment_data_dir,
f'pretrain_{args.dataset}_{args.model}.pth'))
print('Model trained saved to %s' % args.experiment_data_dir)
else:
model.load_state_dict(torch.load(args.pretrained_model_dir))
best_acc = test(args, model, device, criterion, test_loader)
# setup new opotimizer for fine-tuning
optimizer = torch.optim.SGD(model.parameters(),
lr=0.01,
momentum=0.9,
weight_decay=5e-4)
scheduler = MultiStepLR(optimizer,
milestones=[
int(args.pretrain_epochs * 0.5),
int(args.pretrain_epochs * 0.75)
],
gamma=0.1)
print('Pretrained model acc:', best_acc)
return model, optimizer, scheduler
def main(args):
# prepare dataset
torch.manual_seed(0)
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
train_loader, val_loader, criterion = get_data(args.dataset, args.data_dir, args.batch_size, args.test_batch_size)
model, optimizer = get_trained_model_optimizer(args, device, train_loader, val_loader, criterion)
def short_term_fine_tuner(model, epochs=1):
for epoch in range(epochs):
train(args, model, device, train_loader, criterion, optimizer, epoch)
def trainer(model, optimizer, criterion, epoch):
return train(args, model, device, train_loader, criterion, optimizer, epoch=epoch)
def evaluator(model):
return test(model, device, criterion, val_loader)
# used to save the performance of the original & pruned & finetuned models
result = {'flops': {}, 'params': {}, 'performance':{}}
flops, params, _ = count_flops_params(model, get_input_size(args.dataset))
result['flops']['original'] = flops
result['params']['original'] = params
evaluation_result = evaluator(model)
print('Evaluation result (original model): %s' % evaluation_result)
result['performance']['original'] = evaluation_result
# module types to prune, only "Conv2d" supported for channel pruning
if args.base_algo in ['l1', 'l2', 'fpgm']:
op_types = ['Conv2d']
elif args.base_algo == 'level':
op_types = ['default']
config_list = [{
'sparsity': args.sparsity,
'op_types': op_types
}]
dummy_input = get_dummy_input(args, device)
if args.pruner == 'L1FilterPruner':
pruner = L1FilterPruner(model, config_list)
elif args.pruner == 'L2FilterPruner':
pruner = L2FilterPruner(model, config_list)
elif args.pruner == 'FPGMPruner':
pruner = FPGMPruner(model, config_list)
elif args.pruner == 'NetAdaptPruner':
pruner = NetAdaptPruner(model, config_list, short_term_fine_tuner=short_term_fine_tuner, evaluator=evaluator,
base_algo=args.base_algo, experiment_data_dir=args.experiment_data_dir)
elif args.pruner == 'ADMMPruner':
# users are free to change the config here
if args.model == 'LeNet':
if args.base_algo in ['l1', 'l2', 'fpgm']:
config_list = [{
'sparsity': 0.8,
'op_types': ['Conv2d'],
'op_names': ['conv1']
}, {
'sparsity': 0.92,
'op_types': ['Conv2d'],
'op_names': ['conv2']
}]
elif args.base_algo == 'level':
config_list = [{
'sparsity': 0.8,
'op_names': ['conv1']
}, {
'sparsity': 0.92,
'op_names': ['conv2']
}, {
'sparsity': 0.991,
'op_names': ['fc1']
}, {
'sparsity': 0.93,
'op_names': ['fc2']
}]
else:
raise ValueError('Example only implemented for LeNet.')
pruner = ADMMPruner(model, config_list, trainer=trainer, num_iterations=2, epochs_per_iteration=2)
elif args.pruner == 'SimulatedAnnealingPruner':
pruner = SimulatedAnnealingPruner(
model, config_list, evaluator=evaluator, base_algo=args.base_algo,
cool_down_rate=args.cool_down_rate, experiment_data_dir=args.experiment_data_dir)
elif args.pruner == 'AutoCompressPruner':
pruner = AutoCompressPruner(
model, config_list, trainer=trainer, evaluator=evaluator, dummy_input=dummy_input,
num_iterations=3, optimize_mode='maximize', base_algo=args.base_algo,
cool_down_rate=args.cool_down_rate, admm_num_iterations=30, admm_epochs_per_iteration=5,
experiment_data_dir=args.experiment_data_dir)
else:
raise ValueError(
"Pruner not supported.")
# Pruner.compress() returns the masked model
# but for AutoCompressPruner, Pruner.compress() returns directly the pruned model
model = pruner.compress()
evaluation_result = evaluator(model)
print('Evaluation result (masked model): %s' % evaluation_result)
result['performance']['pruned'] = evaluation_result
if args.save_model:
pruner.export_model(
os.path.join(args.experiment_data_dir, 'model_masked.pth'), os.path.join(args.experiment_data_dir, 'mask.pth'))
print('Masked model saved to %s' % args.experiment_data_dir)
# model speedup
if args.speedup:
if args.pruner != 'AutoCompressPruner':
if args.model == 'LeNet':
model = LeNet().to(device)
elif args.model == 'vgg16':
model = VGG(depth=16).to(device)
elif args.model == 'resnet18':
model = ResNet18().to(device)
elif args.model == 'resnet50':
model = ResNet50().to(device)
model.load_state_dict(torch.load(os.path.join(args.experiment_data_dir, 'model_masked.pth')))
masks_file = os.path.join(args.experiment_data_dir, 'mask.pth')
m_speedup = ModelSpeedup(model, dummy_input, masks_file, device)
m_speedup.speedup_model()
evaluation_result = evaluator(model)
print('Evaluation result (speedup model): %s' % evaluation_result)
result['performance']['speedup'] = evaluation_result
torch.save(model.state_dict(), os.path.join(args.experiment_data_dir, 'model_speedup.pth'))
print('Speedup model saved to %s' % args.experiment_data_dir)
flops, params, _ = count_flops_params(model, get_input_size(args.dataset))
result['flops']['speedup'] = flops
result['params']['speedup'] = params
if args.fine_tune:
if args.dataset == 'mnist':
optimizer = torch.optim.Adadelta(model.parameters(), lr=1)
scheduler = StepLR(optimizer, step_size=1, gamma=0.7)
elif args.dataset == 'cifar10' and args.model == 'vgg16':
optimizer = torch.optim.SGD(model.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.fine_tune_epochs*0.5), int(args.fine_tune_epochs*0.75)], gamma=0.1)
elif args.dataset == 'cifar10' and args.model == 'resnet18':
optimizer = torch.optim.SGD(model.parameters(), lr=0.1, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.fine_tune_epochs*0.5), int(args.fine_tune_epochs*0.75)], gamma=0.1)
elif args.dataset == 'cifar10' and args.model == 'resnet50':
optimizer = torch.optim.SGD(model.parameters(), lr=0.1, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.fine_tune_epochs*0.5), int(args.fine_tune_epochs*0.75)], gamma=0.1)
best_acc = 0
for epoch in range(args.fine_tune_epochs):
train(args, model, device, train_loader, criterion, optimizer, epoch)
scheduler.step()
acc = evaluator(model)
if acc > best_acc:
best_acc = acc
torch.save(model.state_dict(), os.path.join(args.experiment_data_dir, 'model_fine_tuned.pth'))
print('Evaluation result (fine tuned): %s' % best_acc)
print('Fined tuned model saved to %s' % args.experiment_data_dir)
result['performance']['finetuned'] = best_acc
with open(os.path.join(args.experiment_data_dir, 'result.json'), 'w+') as f:
json.dump(result, f)
def get_trained_model_optimizer(args, device, train_loader, val_loader, criterion):
if args.model == 'LeNet':
model = LeNet().to(device)
if args.load_pretrained_model:
model.load_state_dict(torch.load(args.pretrained_model_dir))
optimizer = torch.optim.Adadelta(model.parameters(), lr=1e-4)
else:
optimizer = torch.optim.Adadelta(model.parameters(), lr=1)
scheduler = StepLR(optimizer, step_size=1, gamma=0.7)
elif args.model == 'vgg16':
model = VGG(depth=16).to(device)
if args.load_pretrained_model:
model.load_state_dict(torch.load(args.pretrained_model_dir))
optimizer = torch.optim.SGD(model.parameters(), lr=1e-4, momentum=0.9, weight_decay=5e-4)
else:
optimizer = torch.optim.SGD(model.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.pretrain_epochs*0.5), int(args.pretrain_epochs*0.75)], gamma=0.1)
elif args.model == 'resnet18':
model = ResNet18().to(device)
if args.load_pretrained_model:
model.load_state_dict(torch.load(args.pretrained_model_dir))
optimizer = torch.optim.SGD(model.parameters(), lr=1e-4, momentum=0.9, weight_decay=5e-4)
else:
optimizer = torch.optim.SGD(model.parameters(), lr=0.1, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.pretrain_epochs*0.5), int(args.pretrain_epochs*0.75)], gamma=0.1)
elif args.model == 'resnet50':
model = ResNet50().to(device)
if args.load_pretrained_model:
model.load_state_dict(torch.load(args.pretrained_model_dir))
optimizer = torch.optim.SGD(model.parameters(), lr=1e-4, momentum=0.9, weight_decay=5e-4)
else:
optimizer = torch.optim.SGD(model.parameters(), lr=0.1, momentum=0.9, weight_decay=5e-4)
scheduler = MultiStepLR(
optimizer, milestones=[int(args.pretrain_epochs*0.5), int(args.pretrain_epochs*0.75)], gamma=0.1)
else:
raise ValueError("model not recognized")
if not args.load_pretrained_model:
best_acc = 0
best_epoch = 0
for epoch in range(args.pretrain_epochs):
train(args, model, device, train_loader, criterion, optimizer, epoch)
scheduler.step()
acc = test(model, device, criterion, val_loader)
if acc > best_acc:
best_acc = acc
best_epoch = epoch
state_dict = model.state_dict()
model.load_state_dict(state_dict)
print('Best acc:', best_acc)
print('Best epoch:', best_epoch)
if args.save_model:
torch.save(state_dict, os.path.join(args.experiment_data_dir, 'model_trained.pth'))
print('Model trained saved to %s' % args.experiment_data_dir)
return model, optimizer
def main(args):
torch.manual_seed(args.seed)
use_cuda = not args.no_cuda and torch.cuda.is_available()
device = torch.device("cuda" if use_cuda else "cpu")
train_kwargs = {'batch_size': args.batch_size}
test_kwargs = {'batch_size': args.test_batch_size}
if use_cuda:
cuda_kwargs = {'num_workers': 1, 'pin_memory': True, 'shuffle': True}
train_kwargs.update(cuda_kwargs)
test_kwargs.update(cuda_kwargs)
transform = transforms.Compose(
[transforms.ToTensor(),
transforms.Normalize((0.1307, ), (0.3081, ))])
dataset1 = datasets.MNIST('./data',
train=True,
download=True,
transform=transform)
dataset2 = datasets.MNIST('./data', train=False, transform=transform)
train_loader = torch.utils.data.DataLoader(dataset1, **train_kwargs)
test_loader = torch.utils.data.DataLoader(dataset2, **test_kwargs)
model = LeNet().to(device)
optimizer = optim.Adadelta(model.parameters(), lr=args.lr)
print('start pre-training')
scheduler = StepLR(optimizer, step_size=1, gamma=args.gamma)
for epoch in range(1, args.epochs + 1):
train(args, model, device, train_loader, optimizer, epoch)
test(model, device, test_loader)
scheduler.step()
torch.save(model.state_dict(), "pretrain_mnist_lenet.pt")
print('start pruning')
optimizer_finetune = torch.optim.SGD(model.parameters(), lr=0.01)
# create pruner
prune_config = [{
'sparsity': args.sparsity,
'op_types': ['default'],
}]
pruner = LevelPruner(model, prune_config)
model = pruner.compress()
# fine-tuning
best_top1 = 0
for epoch in range(1, args.epochs + 1):
pruner.update_epoch(epoch)
train(args, model, device, train_loader, optimizer_finetune, epoch)
top1 = test(model, device, test_loader)
if top1 > best_top1:
best_top1 = top1
# Export the best model, 'model_path' stores state_dict of the pruned model,
# mask_path stores mask_dict of the pruned model
pruner.export_model(model_path='pruend_mnist_lenet.pt',
mask_path='mask_mnist_lenet.pt')