def validate(val_loader, model, args):
batch_time = AverageMeter()
data_time = AverageMeter()
top1 = AverageMeter()
top5 = AverageMeter()
# switch to evaluate mode
model.eval()
result = 0
with torch.no_grad():
end = time.time()
labels_len = 0
for inputs, labels in val_loader:
data_time.update(time.time() - end)
inputs, labels = inputs.cuda(), labels.cuda()
outputs = model(inputs)
outputs = F.softmax(outputs, dim=1)
acc1, acc5 = accuracy(outputs, labels, topk=(1, 2))
top1.update(acc1.item(), inputs.size(0))
top5.update(acc5.item(), inputs.size(0))
batch_time.update(time.time() - end)
end = time.time()
# compute softmax loss
pred_score = outputs.cuda().data.cpu().numpy()
for i in range(len(labels)):
for j in range(4):
if labels[i] == j:
result += math.log(pred_score[i][j])
labels_len += len(labels)
result = -result/labels_len
logger.info(f'rb loss: {result}')
throughput = 1.0 / (batch_time.avg / inputs.size(0))
return top1.avg, top5.avg, throughput, result
def train(train_loader, model, criterion, optimizer, scheduler, epoch, logger,
args):
top1 = AverageMeter()
top5 = AverageMeter()
losses = AverageMeter()
# switch to train mode
model.train()
iters = len(train_loader.dataset) // args.batch_size
prefetcher = DataPrefetcher(train_loader)
inputs, labels = prefetcher.next()
iter_index = 1
while inputs is not None:
inputs, labels = inputs.cuda(), labels.cuda()
outputs = model(inputs)
loss = criterion(outputs, labels)
loss = loss / args.accumulation_steps
if args.apex:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
if iter_index % args.accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
# measure accuracy and record loss
acc1, acc5 = accuracy(outputs, labels, topk=(1, 5))
top1.update(acc1.item(), inputs.size(0))
top5.update(acc5.item(), inputs.size(0))
losses.update(loss.item(), inputs.size(0))
inputs, labels = prefetcher.next()
if iter_index % args.print_interval == 0:
logger.info(
f"train: epoch {epoch:0>3d}, iter [{iter_index:0>4d}, {iters:0>4d}], lr: {scheduler.get_lr()[0]:.6f}, top1 acc: {acc1.item():.2f}%, top5 acc: {acc5.item():.2f}%, loss_total: {loss.item():.2f}"
)
iter_index += 1
scheduler.step()
return top1.avg, top5.avg, losses.avg
def validate(val_loader, model, args):
batch_time = AverageMeter()
data_time = AverageMeter()
top1 = AverageMeter()
top5 = AverageMeter()
# switch to evaluate mode
model.eval()
with torch.no_grad():
end = time.time()
for inputs, labels in val_loader:
data_time.update(time.time() - end)
inputs, labels = inputs.cuda(), labels.cuda()
outputs = model(inputs)
acc1, acc5 = accuracy(outputs, labels, topk=(1, 5))
top1.update(acc1.item(), inputs.size(0))
top5.update(acc5.item(), inputs.size(0))
batch_time.update(time.time() - end)
end = time.time()
throughput = 1.0 / (batch_time.avg / inputs.size(0))
return top1.avg, top5.avg, throughput
def main(logger, args):
if not torch.cuda.is_available():
raise Exception("need gpu to train network!")
if args.seed is not None:
random.seed(args.seed)
torch.manual_seed(args.seed)
torch.cuda.manual_seed_all(args.seed)
cudnn.deterministic = True
gpus = torch.cuda.device_count()
logger.info(f'use {gpus} gpus')
logger.info(f"args: {args}")
cudnn.benchmark = True
cudnn.enabled = True
start_time = time.time()
train_loader = DataLoader(Config.train_dataset,
batch_size=args.batch_size,
shuffle=True,
pin_memory=True,
num_workers=args.num_workers)
val_loader = DataLoader(Config.val_dataset,
batch_size=args.batch_size,
shuffle=False,
pin_memory=True,
num_workers=args.num_workers)
logger.info('finish loading data')
# dataset and dataloader
logger.info('start loading data')
model_b3 = models.__dict__['efficientnet_b3'](**{
"pretrained": False,
"num_classes": 4,
})
model_12GF = models.__dict__['RegNetY_12GF'](**{
"pretrained": False,
"num_classes": 4,
})
'''
model_vovnet = models.__dict__['VoVNet99_se'](**{
"pretrained": False,
"num_classes": 4,
})
'''
model_32GF = models.__dict__['RegNetY_32GF'](**{
"pretrained": False,
"num_classes": 4,
})
for name, param in model_b3.named_parameters():
param.requires_grad = False
logger.info(f"{name},{param.requires_grad}")
for name, param in model_12GF.named_parameters():
param.requires_grad = False
logger.info(f"{name},{param.requires_grad}")
'''
for name, param in model_vovnet.named_parameters():
param.requires_grad = False
logger.info(f"{name},{param.requires_grad}")
'''
for name, param in model_32GF.named_parameters():
param.requires_grad = False
logger.info(f"{name},{param.requires_grad}")
# merge model
logger.info(f"creating ensemble model")
#model = JSTNET(model_b3, model_12GF, model_32GF, model_vovnet)
model = JSTNET(model_b3, model_12GF, model_32GF)
model = model.cuda()
model_b3 = model_b3.cuda()
model_12GF = model_12GF.cuda()
model_32GF = model_32GF.cuda()
#model_vovnet = model_vovnet.cuda()
criterion = nn.CrossEntropyLoss().cuda()
optimizer = torch.optim.SGD(model.parameters(),
args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
# warm_up_with_cosine_lr
warm_up_with_cosine_lr = lambda epoch: epoch / args.warm_up_epochs if epoch <= args.warm_up_epochs else 0.5 * (
math.cos((epoch - args.warm_up_epochs) /
(args.epochs - args.warm_up_epochs) * math.pi) + 1)
scheduler = torch.optim.lr_scheduler.LambdaLR(
optimizer, lr_lambda=warm_up_with_cosine_lr)
if args.apex:
model, optimizer = amp.initialize(model, optimizer, opt_level='O1')
model = nn.DataParallel(model)
#load model
my_path = '/home/jns2szh/code/pytorch-ImageNet-CIFAR-COCO-VOC-training-master/imagenet_experiments/'
logger.info(f"start load model")
checkpoint_b3 = torch.load(my_path+'efficientnet_imagenet_DataParallel_train_example/checkpoints_b3/latest.pth', map_location=torch.device('cpu'))
new_state_dict = OrderedDict()
for k, v in checkpoint_b3['model_state_dict'].items():
name = k[7:] # remove module.
if name != 'fc.weight' and name != 'fc.bias':
new_state_dict[name] = v
model_b3.load_state_dict(new_state_dict)
logger.info(f"load b3 model finished")
checkpoint_12GF = torch.load(my_path+'regnet_imagenet_Dataparallel_train_example/regnet_12/latest.pth', map_location=torch.device('cpu'))
new_state_dict = OrderedDict()
for k, v in checkpoint_12GF['model_state_dict'].items():
name = k[7:] # remove module.
if name != 'fc.weight' and name != 'fc.bias':
new_state_dict[name] = v
model_12GF.load_state_dict(new_state_dict)
logger.info(f"load 12GF model finished")
'''
checkpoint_vovnet = torch.load(my_path+'vovnet_Dataparallel_train_example/checkpoints/latest.pth', map_location=torch.device('cpu'))
new_state_dict = OrderedDict()
for k, v in checkpoint_vovnet['model_state_dict'].items():
name = k[7:] # remove module.
if name != 'fc.weight' and name != 'fc.bias':
new_state_dict[name] = v
model_vovnet.load_state_dict(new_state_dict)
logger.info(f"load vovnet model finished")
'''
checkpoint_32GF = torch.load(my_path+'regnet_imagenet_Dataparallel_train_example/checkpoints/latest.pth', map_location=torch.device('cpu'))
new_state_dict = OrderedDict()
for k, v in checkpoint_32GF['model_state_dict'].items():
name = k[7:] # remove module.
if name != 'fc.weight' and name != 'fc.bias':
new_state_dict[name] = v
model_32GF.load_state_dict(new_state_dict)
logger.info(f"load 32GF model finished")
# resume training
start_epoch=0
if os.path.exists(args.resume):
logger.info(f"start resuming model from {args.resume}")
checkpoint = torch.load(args.resume, map_location=torch.device('cpu'))
start_epoch += checkpoint['epoch']
model.load_state_dict(checkpoint['model_state_dict'])
optimizer.load_state_dict(checkpoint['optimizer_state_dict'])
scheduler.load_state_dict(checkpoint['scheduler_state_dict'])
logger.info(
f"finish resuming model from {args.resume}, epoch {checkpoint['epoch']}, "
f"loss: {checkpoint['loss']:3f}, lr: {checkpoint['lr']:.6f}, "
f"top1_acc: {checkpoint['acc1']}%")
if not os.path.exists(args.checkpoints):
os.makedirs(args.checkpoints)
logger.info('start training')
min_rb_loss = 1000
for epoch in range(start_epoch, args.epochs + 1):
#print(epoch, logger,args)
'''
acc1, losses = train(train_loader, model, criterion, optimizer,
epoch,
logger)
'''
top1 = AverageMeter()
top5 = AverageMeter()
losses = AverageMeter()
# switch to train mode
model.train()
iters = len(train_loader.dataset) // args.batch_size
prefetcher = DataPrefetcher(train_loader)
inputs, labels = prefetcher.next()
iter_index = 1
while inputs is not None:
inputs, labels = inputs.cuda(), labels.cuda()
outputs = model(inputs)
loss = criterion(outputs, labels)
loss = loss / 1
if args.apex:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
if iter_index % 1 == 0:
optimizer.step()
optimizer.zero_grad()
# measure accuracy and record loss
acc1, acc5 = accuracy(outputs, labels, topk=(1, 2))
top1.update(acc1.item(), inputs.size(0))
top5.update(acc5.item(), inputs.size(0))
losses.update(loss.item(), inputs.size(0))
inputs, labels = prefetcher.next()
if iter_index % args.print_interval == 0:
logger.info(
f"train: epoch {epoch:0>3d}, iter [{iter_index:0>4d}, {iters:0>4d}], lr: {scheduler.get_lr()[0]:.6f}, top1 acc: {acc1.item():.2f}%, top5 acc: {acc5.item():.2f}%, loss_total: {loss.item():.2f}"
)
iter_index += 1
scheduler.step()
'''
logger.info(
f"train: epoch {epoch:0>3d}, top1 acc: {acc1:.2f}%, losses: {losses:.2f}"
)
'''
acc1, acc5, throughput, rb_loss = validate(val_loader, model)
logger.info(
f"val: epoch {epoch:0>3d}, top1 acc: {acc1:.2f}%, top5 acc: {acc5:.2f}%, throughput: {throughput:.2f}sample/s"
)
if rb_loss < min_rb_loss:
min_rb_loss = rb_loss
logger.info("save model")
torch.save(
{
'epoch': epoch,
'acc1': acc1,
'loss': losses,
'lr': scheduler.get_lr()[0],
'model_state_dict': model.state_dict(),
'optimizer_state_dict': optimizer.state_dict(),
'scheduler_state_dict': scheduler.state_dict(),
}, os.path.join(args.checkpoints, 'latest.pth'))
if epoch == args.epochs:
torch.save(
{
'epoch': epoch,
'acc1': acc1,
'loss': losses,
'lr': scheduler.get_lr()[0],
'model_state_dict': model.state_dict(),
'optimizer_state_dict': optimizer.state_dict(),
'scheduler_state_dict': scheduler.state_dict(),
},
os.path.join(
args.checkpoints,
"{}-epoch{}-acc{}.pth".format('JSTNET', epoch, acc1)))
training_time = (time.time() - start_time) / 3600
logger.info(
f"finish training, total training time: {training_time:.2f} hours")