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main.py
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main.py
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import copy
import torch
import torch.nn as nn
import torch.optim as optim
import torch.nn.functional as F
import torch.backends.cudnn as cudnn
import torch.distributed.autograd as dist_autograd
import torch.distributed.rpc as rpc
import higher
import argparse
import os
from models import *
import time
from tensorboardX import SummaryWriter
from ultils import *
model_names = ['res18', 'res50', 'wrn28_10', 'res18_224']
data_path = ['./data', 'isic_data/ISIC_2019_Training_Input', '/data1/data/clothing1m/clothing1M']
parser = argparse.ArgumentParser(description='Baseline Training')
parser.add_argument('--lr', default=0.1, type=float, help='learning rate')
parser.add_argument('--num_epochs', default=300, type=int)
parser.add_argument('--multi_runs', default=1, type=int)
parser.add_argument('--dataset', default='cifar10', type=str)
parser.add_argument('--reweight_label', action='store_true')
parser.add_argument('--exp', type=str,
default='baseline_cifar10', help='exp name')
parser.add_argument('--num_classes', default=10, type=int)
parser.add_argument('--num_meta', default=1000, type=int)
parser.add_argument('--gpuid', default="0", type=str)
parser.add_argument('--train_batch_size', default=256, type=int,
help="Total batch size for training.")
parser.add_argument('--eval_batch_size', default=128, type=int,
help="Total batch size for eval.")
parser.add_argument('--corruption_prob', default=0.2, type=float, help='corruption rate')
parser.add_argument('--corruption_type', default='unif', type=str, help='corruption type')
parser.add_argument('--norm_type', default='org', type=str, help='normalization type')
parser.add_argument('--clipping_norm', default=0, type=float, help='')
parser.add_argument('--seed', type=int, default=1)
parser.add_argument('--num_batch', type=int, default=250)
parser.add_argument('--ngpu', type=int, default=3, help='0 = CPU')
parser.add_argument('--local_rank', type=int, default=0, help='node rank for distributed training')
parser.add_argument('--distribute', action='store_true')
parser.add_argument('--arch', metavar='ARCH', default='wrn28_10', choices=model_names,
help='model architecture: ' + ' | '.join(model_names) + ' (default: wrn28_10)')
parser.add_argument('--data_path', metavar='ARCH', default='./data', choices=data_path,
help='model architecture: ' + ' | '.join(data_path) + ' (default: ./data)')
parser.add_argument('--baseline', action='store_true')
parser.add_argument('--wd', default=5e-4, type=float, help='weight decay for SGD')
parser.add_argument('--temp_label', type=str,
help='temporal_label txt name')
parser.add_argument('--meta_opt', type=str, default='sgd',
help='type of meta optimizer')
parser.add_argument('--meta_lr', type=float, default=1e-2,
help='learning rate of meta optimizer')
parser.add_argument('--meta_step', type=int, default=1,
help='training step of meta optimizer')
parser.add_argument('--print_freq', type=int, default=50,
help='print frequency')
parser.add_argument('--scheduler', type=str, default='step',
help='type of scheduler')
parser.add_argument('--temperature', default=1.0, type=float, help='temperature for softmax norm')
parser.add_argument('--milestone', type=str, nargs='+', default=[150],
help='milestone of step scheduler')
parser.add_argument('--warm_up', type=int, default=1,
help='warm up training with CE')
parser.add_argument('--hard_weight', action='store_true')
parser.add_argument('--mixup', action='store_true')
parser.add_argument('--eval', action='store_true')
parser.add_argument('--resume', type=str, default=None,
help='path to checkpoint')
parser.add_argument('--no_val_data', action='store_true',
help='using validation set or not')
def main(args):
global best_acc
best_acc = 0
start_time = time.time()
current_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
exp = args.arch + '_' +'temperature_'+str(args.temperature)+\
'_'+'corruption_'+str(args.corruption_prob)+ '_'+\
'epochs_'+str(args.num_epochs)+ '_'+\
'dataset_'+str(args.dataset)+ '_'+args.exp
if not os.path.exists(os.path.join('checkpoint', exp)) and is_main_process():
os.mkdir(os.path.join('checkpoint', exp))
exp = os.path.join(exp, current_time.strip().replace(' ', '-'))
writer = None
if not os.path.exists(os.path.join('checkpoint', exp)) and is_main_process():
os.mkdir(os.path.join('checkpoint', exp))
writer = SummaryWriter(log_dir=os.path.join('logs/', exp))
print('Experiments is conducted on:', exp)
print('==> Preparing data..')
if args.local_rank == 0:
print(args)
if args.mixup:
print('Using Mixup For training')
if args.arch == 'res50':
net = ResNet50(num_classes=args.num_classes).cuda(device=args.gpuid)
elif args.arch == 'res18':
net = PreActResNet18(num_classes=args.num_classes).cuda(device=args.gpuid)
elif args.arch == 'wrn28_10':
net = wrn28_10(num_classes=args.num_classes).cuda(device=args.gpuid)
elif args.arch == 'res18_224':
net = ResNet18(num_classes=args.num_classes)
if args.resume:
path = args.resume
dict = torch.load(path, map_location='cpu')['net']
net_dict = net.state_dict()
idy = 0
for k, v in dict.items():
k = k.replace('module.', '')
if k in net_dict:
net_dict[k] = v
idy += 1
print(len(net_dict), idy, 'update state dict already')
net.load_state_dict(net_dict)
net = net.cuda(device=args.gpuid)
if args.distribute:
net = torch.nn.parallel.DistributedDataParallel(net, device_ids=[args.gpuid])
if args.baseline:
print('using the norm CE loss')
criterion = nn.CrossEntropyLoss().cuda()
else:
criterion = nn.CrossEntropyLoss(reduction="none").cuda(args.gpuid)
optimizer = optim.SGD(net.parameters(), lr=args.lr, momentum=0.9, weight_decay=args.wd)
if args.meta_opt == 'adam':
optimizer_meta = optim.Adam(net.parameters(), lr=args.meta_lr, weight_decay=0,
# args.wdecay, # meta should have wdecay or not??
amsgrad=True, eps=1e-8)
elif args.meta_opt == 'sgd':
optimizer_meta = optim.SGD(net.parameters(), lr=args.meta_lr, momentum=0.9, weight_decay=0)
if args.scheduler =='cos':
scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer, T_max=args.num_epochs)
elif args.scheduler =='step':
args.milestone =[int(step) for step in args.milestone]
scheduler = torch.optim.lr_scheduler.MultiStepLR(optimizer, milestones=args.milestone, gamma=0.1)
args.temp_label = args.dataset + 'label.txt'
if os.path.exists(args.temp_label) and is_main_process():
os.remove(args.temp_label)
print('remove the temp label file already')
if not args.dataset =='clothing1m':
trainloader, testloader, metaloader, train_sampler, test_sampler, meta_sampler = prepare_dataloder(args)
if args.eval:
trainloader, testloader, metaloader, train_sampler, test_sampler, meta_sampler = prepare_dataloder(args)
acc, test_loss = val(0, testloader, net, writer, args)
print('-----------------------------------------------------')
print(' CURRENT loss: {:.4f}'.format(test_loss.avg))
print(' BEST accuracy: {:.4f}'.format(acc))
print('-----------------------------------------------------')
return
for epoch in range(args.num_epochs):
if args.dataset == 'clothing1m':
if not args.no_val_data:
trainloader, testloader, metaloader, train_sampler, test_sampler, meta_sampler = prepare_dataloder(args)
else:
if is_main_process():
print('using pseudo labeled training subset for training')
trainloader, testloader, metaloader, train_sampler, test_sampler, meta_sampler = prepare_dataloder_clothing1m(args)
train(epoch, trainloader, metaloader, train_sampler, net, meta_sampler, test_sampler,
optimizer, optimizer_meta, criterion, writer , args)
acc, test_loss = val(epoch, testloader, net, writer, args )
scheduler.step()
if acc > best_acc :
if is_main_process():
print('Saving..')
state = {
'net': net.state_dict(),
'acc': acc,
'epoch': epoch,
}
if not os.path.isdir('checkpoint'):
os.mkdir('checkpoint')
torch.save(state, './checkpoint/{}_ckpt.pth'.format(exp))
best_acc = acc
if is_main_process():
print('-----------------------------------------------------')
print('At epoch: {:03d} CURRENT loss: {:.4f}'.format(epoch, test_loss.avg))
print('At epoch: {:03d} BEST accuracy: {:.4f}'.format(epoch, best_acc))
print('At epoch: {:03d} CURRENT accuracy: {:.4f}'.format(epoch, acc))
print('-----------------------------------------------------')
if is_main_process():
current_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
end_time = time.time()
print(current_time, end_time-start_time)
return best_acc
def train(epoch, trainloader, metaloader, train_sampler, net, meta_sampler, test_sampler,
optimizer, optimizer_meta, criterion, writer , args):
if args.distribute:
train_sampler.set_epoch(epoch)
if not args.baseline:
meta_sampler.set_epoch(epoch)
test_sampler.set_epoch(epoch)
net.train()
train_loss = AverageMeter()
train_top1 = AverageMeter()
for i, (image, labels) in enumerate(trainloader):
image = image.cuda(non_blocking=True)
labels = labels.cuda(non_blocking=True)
org_label = labels
if args.mixup:
lam = np.random.beta(32.0, 32.0)
indices = np.random.permutation(image.size(0))
image = image * lam + image[indices] * (1 - lam)
labels_shuffel = labels[indices]
if args.baseline :
outputs = net(image)
if args.mixup:
l_f = criterion(outputs, labels)*lam + criterion(outputs, labels_shuffel)*(1 - lam)
else:
l_f =criterion(outputs, labels)
prec1, prec5 = accuracy(outputs, org_label, topk=(1, 5))
else:
if epoch <= (args.warm_up-1):
outputs = net(image)
criterion_warm = nn.CrossEntropyLoss().cuda()
if args.mixup:
l_f = criterion_warm(outputs, labels) * lam + criterion_warm(outputs, labels_shuffel) * (1 - lam)
else:
l_f = criterion_warm(outputs, labels)
prec1, prec5 = accuracy(outputs, org_label, topk=(1, 5))
else:
with higher.innerloop_ctx(net, optimizer) as (meta_net, meta_optimizer):
for s in range(args.meta_step):
y_f_hat = meta_net(image)
_, pesudo_labels = y_f_hat.max(1)
if args.reweight_label:
if args.mixup:
cost1 = criterion(y_f_hat, labels) * lam + criterion(y_f_hat, labels_shuffel) * (1 - lam)
cost2 = criterion(y_f_hat, pesudo_labels)
else:
cost1 = criterion(y_f_hat, labels)
cost2 = criterion(y_f_hat, pesudo_labels)
cost = torch.cat((cost1.unsqueeze(0), cost2.unsqueeze(0)), dim=0)
else:
if args.mixup:
cost = criterion(y_f_hat, labels) * lam + criterion(y_f_hat, labels_shuffel) * (1 - lam)
else:
cost = criterion(y_f_hat, labels)
eps = torch.zeros(cost.size()).cuda()
eps = eps.requires_grad_()
l_f_meta = torch.sum(cost * eps)
meta_optimizer.step(l_f_meta)
val_data, val_labels = next(iter(metaloader))
val_data = val_data.cuda()
val_labels = val_labels.cuda()
y_g_hat = meta_net(val_data)
l_g_meta = torch.mean(criterion(y_g_hat, val_labels))
grad_eps = torch.autograd.grad(l_g_meta, eps, only_inputs=True, allow_unused=True)[0].detach()
if not args.reweight_label:
w_tilde = torch.clamp(-grad_eps, min=0)
if args.dataset =='ISIC':
w_tilde = torch.sigmoid(w_tilde)
norm_c = torch.sum(w_tilde) + 1e-10
if norm_c != 0:
weight = w_tilde / norm_c
else:
weight = w_tilde
else:
w_tilde = -grad_eps
w_tilde = w_tilde.view(-1)
if args.hard_weight:
w_tilde = F.softmax(w_tilde , dim=-1)
zeros = torch.zeros_like(w_tilde).cuda()
weight = torch.where(w_tilde<= args.temperature, zeros, w_tilde )
else:
# $weight = F.softmax(w_tilde/args.temperature, dim=-1)
if args.norm_type=='org':
w_tilde = torch.clamp(w_tilde, min=0)
#if args.dataset == 'ISIC':
# w_tilde = torch.sigmoid(w_tilde)
norm_c = torch.sum(w_tilde) + 1e-10
if norm_c != 0:
weight = w_tilde / norm_c
else:
weight = w_tilde
elif args.norm_type=='softmax':
weight = F.softmax(w_tilde/args.temperature, dim=-1)
elif args.norm_type== 'sigmoid':
sigmoid = nn.Sigmoid()
weight = sigmoid(w_tilde)
weight /= torch.sum(weight)
weight = weight.view(2, -1)
y_f_hat = net(image)
_, pesudo_labels = y_f_hat.max(1)
prec1, prec5 = accuracy(y_f_hat, org_label, topk=(1, 5))
if args.reweight_label:
if args.mixup:
cost1 = criterion(y_f_hat, labels) * lam + criterion(y_f_hat, labels_shuffel) * (1 - lam)
cost2 = criterion(y_f_hat, pesudo_labels)
else:
cost1 = criterion(y_f_hat, labels)
cost2 = criterion(y_f_hat, pesudo_labels)
cost = torch.cat((cost1.unsqueeze(0), cost2.unsqueeze(0)), dim=0)
else:
if args.mixup:
cost = criterion(y_f_hat, labels) * lam + criterion(y_f_hat, labels_shuffel) * (1 - lam)
else:
cost = criterion(y_f_hat, labels)
l_f = torch.sum(cost * weight)
optimizer.zero_grad()
l_f.backward()
if args.clipping_norm > 0:
nn.utils.clip_grad_norm_(net.parameters(), args.clipping_norm, norm_type=2)
optimizer.step()
train_loss.update(l_f.item(), image.size(0))
train_top1.update(prec1.item(), image.size(0))
if i % args.print_freq == 0 and is_main_process():
print('At epoch: {:03d} Step: {:03d}/{:03d} AVERAGE Acc: {:.4f} AVERAGE TRAIN loss : {:.4f}'.
format(epoch, i, len(trainloader), train_top1.avg, train_loss.val))
if args.distribute:
train_loss.synchronize_between_processes()
train_top1.synchronize_between_processes()
if is_main_process():
writer.add_scalar('Train/loss', train_loss.avg, epoch)
writer.add_scalar('Train/lr', optimizer.param_groups[-1]['lr'], epoch)
print('At epoch: {:03d} the learning rate is : {:.4f}'.format(epoch, optimizer.param_groups[0]['lr']))
print('At epoch: {:03d} AVERAGE TRAIN loss : {:.4f}'.format(epoch, train_loss.avg))
else:
writer.add_scalar('Train/loss', train_loss.avg, epoch)
writer.add_scalar('Train/lr', optimizer.param_groups[-1]['lr'], epoch)
print('At epoch: {:03d} the learning rate is : {:.4f}'.format(epoch, optimizer.param_groups[0]['lr']))
print('At epoch: {:03d} AVERAGE TRAIN loss : {:.4f}'.format(epoch, train_loss.avg))
def val(epoch, testloader, net, writer, args):
net.eval()
test_loss = AverageMeter()
top1 =AverageMeter()
with torch.no_grad():
for i, (inputs, targets) in enumerate(testloader):
inputs = torch.autograd.Variable(inputs.cuda())
targets = torch.autograd.Variable(targets.cuda())
torch.cuda.synchronize()
outputs = net(inputs)
test_loss_criterion = nn.CrossEntropyLoss().cuda()
loss = test_loss_criterion(outputs, targets)
torch.cuda.synchronize()
prec1, prec5 = accuracy(outputs, targets, topk=(1, 5))
test_loss.update(loss.item(), inputs.size(0))
top1.update(prec1.item(), inputs.size(0))
if args.distribute:
top1.synchronize_between_processes()
test_loss.synchronize_between_processes()
if is_main_process():
writer.add_scalar('Test/loss', test_loss.avg, epoch)
writer.add_scalar('Test/acc', top1.avg, epoch)
writer.add_scalar('Test/best_acc', best_acc, epoch)
else:
writer.add_scalar('Test/loss', test_loss.avg, epoch)
writer.add_scalar('Test/acc', top1.avg, epoch)
writer.add_scalar('Test/best_acc', best_acc, epoch)
return top1.avg, test_loss
if __name__ == '__main__':
args = parser.parse_args()
torch.backends.cudnn.benchmark = True
torch.backends.cudnn.enabled = True
if args.distribute:
torch.cuda.set_device(args.local_rank)
torch.distributed.init_process_group(
'nccl',
init_method='env://'
)
args.gpuid = torch.device(f'cuda:{args.local_rank}')
args.seed = args.local_rank
else:
args.gpuid = torch.device(f'cuda:{args.gpuid}')
best = []
for i in range(args.multi_runs):
args.seed = i
best.append(main(args))
print(best)