def build_model(self) -> nn.Module:
opt = get_cli_args(batch_size=pedl_batch_size,
prebias=pedl_prebias,
accumulate=pedl_accumulate)
hyp = get_hyp(lr0=pedl_init_lr)
# Initialize model
model = Darknet(opt.cfg, arc=opt.arc) # .to(device)
# Fetch starting weights
# TODO Once download_data_fn is implemented this should go into download_data
attempt_download(opt.weights)
chkpt = torch.load(opt.weights)
# load model
try:
chkpt["model"] = {
k: v
for k, v in chkpt["model"].items()
if model.state_dict()[k].numel() == v.numel()
}
model.load_state_dict(chkpt["model"], strict=False)
except KeyError as e:
s = (
"%s is not compatible with %s. Specify --weights '' or specify a --cfg compatible with %s. "
"See https://github.com/ultralytics/yolov3/issues/657" %
(opt.weights, opt.cfg, opt.weights))
raise KeyError(s) from e
del chkpt
data_dict = get_data_cfg()
nc = 1 if opt.single_cls else int(data_dict["classes"])
model.nc = nc # attach number of classes to model
model.arc = opt.arc # attach yolo architecture
model.hyp = hyp # attach hyperparameters to model
train_dataset = LazyModule.get()
# The model class weights depend on the dataset labels
model.class_weights = labels_to_class_weights(
train_dataset.labels, nc) # attach class weights
return model
def greedy_channel_select(origin_model, prune_cfg, origin_weights,
select_layer, device, aux_util, data_loader,
pruned_rate):
init_state_dict = mask_converted(prune_cfg, origin_weights, target=None)
prune_model = Darknet(prune_cfg).to(device)
prune_model.load_state_dict(init_state_dict, strict=True)
del init_state_dict
solve_sub_problem_optimizer = optim.SGD(
prune_model.module_list[int(select_layer)].MaskConv2d.parameters(),
lr=hyp['lr0'],
momentum=hyp['momentum'])
hook_util = HookUtils()
handles = []
info = aux_util.layer_info[int(select_layer)]
in_channels = info['in_channels']
remove_k = math.floor(in_channels * pruned_rate)
k = in_channels - remove_k
for name, child in origin_model.module_list.named_children():
if name == select_layer:
handles.append(
child.BatchNorm2d.register_forward_hook(
hook_util.hook_origin_input))
aux_idx = aux_util.conv_layer_dict[select_layer]
hook_layer_aux = aux_util.down_sample_layer[aux_idx]
for name, child in prune_model.module_list.named_children():
if name == select_layer:
handles.append(
child.BatchNorm2d.register_forward_hook(
hook_util.hook_prune_input))
elif name == hook_layer_aux:
handles.append(
child.register_forward_hook(hook_util.hook_prune_input))
aux_net = aux_util.creat_aux_list(416,
device,
conv_layer_name=select_layer)
chkpt_aux = torch.load(aux_weight, map_location=device)
aux_net.load_state_dict(chkpt_aux['aux{}'.format(aux_idx)])
del chkpt_aux
if device.type != 'cpu' and torch.cuda.device_count() > 1:
prune_model = torch.nn.parallel.DistributedDataParallel(
prune_model, find_unused_parameters=True)
prune_model.yolo_layers = prune_model.module.yolo_layers
aux_net = torch.nn.parallel.DistributedDataParallel(
aux_net, find_unused_parameters=True)
nb = len(data_loader)
prune_model.nc = 80
prune_model.hyp = hyp
prune_model.arc = 'default'
prune_model.eval()
aux_net.eval()
MSE = nn.MSELoss(reduction='mean')
greedy = torch.zeros(k)
for i_k in range(k):
pbar = tqdm(enumerate(data_loader), total=nb)
print(('\n' + '%10s' * 8) % ('Stage', 'gpu_mem', 'iter', 'MSELoss',
'PdLoss', 'AuxLoss', 'Total', 'targets'))
for i, (imgs, targets, _, _) in pbar:
if len(targets) == 0:
continue
imgs = imgs.to(device).float(
) / 255.0 # uint8 to float32, 0 - 255 to 0.0 - 1.0
targets = targets.to(device)
with torch.no_grad():
_ = origin_model(imgs)
_, pruning_pred = prune_model(imgs)
pruning_loss, _ = compute_loss(pruning_pred, targets, prune_model)
hook_util.cat_to_gpu0('prune')
aux_pred = aux_net(hook_util.prune_features['gpu0'][1])
aux_loss, _ = AuxNetUtils.compute_loss_for_aux(
aux_pred, aux_net, targets)
mse_loss = torch.zeros(1).to(device)
mse_loss += MSE(hook_util.prune_features['gpu0'][0],
hook_util.origin_features['gpu0'][0])
loss = hyp['joint_loss'] * mse_loss + pruning_loss + aux_loss
loss.backward()
mem = torch.cuda.memory_cached() / 1E9 if torch.cuda.is_available(
) else 0
s = ('%10s' * 3 + '%10.3g' * 5) % (
'Pruning ' + select_layer, '%.3gG' % mem, '%g/%g' %
(i_k, k), mse_loss, pruning_loss, aux_loss, loss, len(targets))
pbar.set_description(s)
hook_util.clean_hook_out('origin')
hook_util.clean_hook_out('prune')
grad = prune_model.module.module_list[int(
select_layer)].MaskConv2d.weight.grad.detach().clone()**2
grad = grad.sum((2, 3)).sqrt().sum(0)
if i_k == 0:
prune_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask[:] = 1e-5
_, non_greedy_indices = torch.topk(grad, k)
logger.info('non greedy layer{}: selected==>{}'.format(
select_layer, str(non_greedy_indices)))
selected_channels_mask = prune_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask
_, indices = torch.topk(grad * (1 - selected_channels_mask), 1)
prune_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask[indices] = 1
greedy[i_k] = indices
logger.info('greedy layer{} iter{}: indices==>{}'.format(
select_layer, str(i_k), str(indices)))
prune_model.zero_grad()
pbar = tqdm(enumerate(data_loader), total=nb)
mloss = torch.zeros(4).to(device)
print(('\n' + '%10s' * 8) % ('Stage', 'gpu_mem', 'iter', 'MSELoss',
'PdLoss', 'AuxLoss', 'Total', 'targets'))
for i, (imgs, targets, _, _) in pbar:
if len(targets) == 0:
continue
imgs = imgs.to(device).float(
) / 255.0 # uint8 to float32, 0 - 255 to 0.0 - 1.0
targets = targets.to(device)
with torch.no_grad():
_ = origin_model(imgs)
_, pruning_pred = prune_model(imgs)
pruning_loss, _ = compute_loss(pruning_pred, targets, prune_model)
hook_util.cat_to_gpu0('prune')
aux_pred = aux_net(hook_util.prune_features['gpu0'][1])
aux_loss, _ = AuxNetUtils.compute_loss_for_aux(
aux_pred, aux_net, targets)
mse_loss = torch.zeros(1).to(device)
mse_loss += MSE(hook_util.prune_features['gpu0'][0],
hook_util.origin_features['gpu0'][0])
loss = hyp['joint_loss'] * mse_loss + pruning_loss + aux_loss
loss.backward()
solve_sub_problem_optimizer.step()
solve_sub_problem_optimizer.zero_grad()
mem = torch.cuda.memory_cached() / 1E9 if torch.cuda.is_available(
) else 0
mloss = (mloss * i + torch.cat(
[mse_loss, pruning_loss, aux_loss, loss]).detach()) / (i + 1)
s = ('%10s' * 3 + '%10.3g' * 5) % ('SubProm ' + select_layer,
'%.3gG' % mem, '%g/%g' %
(i_k, k), *mloss, len(targets))
pbar.set_description(s)
hook_util.clean_hook_out('origin')
hook_util.clean_hook_out('prune')
for handle in handles:
handle.remove()
logger.info(
("greedy layer{}: selected==>{}".format(select_layer, str(greedy))))
def fine_tune(prune_cfg,
data,
aux_util,
device,
train_loader,
test_loader,
epochs=10):
with open(progress_result, 'a') as f:
f.write(('\n' + '%10s' * 10 + '\n') %
('Stage', 'Epoch', 'DIoU', 'obj', 'cls', 'Total', 'P', 'R',
'[email protected]', 'F1'))
batch_size = train_loader.batch_size
img_size = train_loader.dataset.img_size
accumulate = 64 // batch_size
hook_util = HookUtils()
pruned_model = Darknet(prune_cfg, img_size=(img_size, img_size)).to(device)
chkpt = torch.load(progress_chkpt, map_location=device)
pruned_model.load_state_dict(chkpt['model'], strict=True)
current_layer = chkpt['current_layer']
aux_in_layer = aux_util.conv_layer_dict[current_layer]
aux_model = aux_util.creat_aux_model(aux_in_layer)
aux_model.to(device)
aux_model.load_state_dict(chkpt['aux_in{}'.format(aux_in_layer)],
strict=True)
aux_loss_scalar = max(0.01, pow((int(aux_in_layer) + 1) / 75, 2))
start_epoch = chkpt['epoch'] + 1
if start_epoch == epochs:
return current_layer # fine tune 完毕，返回需要修剪的层名
pg0, pg1 = [], [] # optimizer parameter groups
for k, v in dict(pruned_model.named_parameters()).items():
if 'MaskConv2d.weight' in k:
pg1 += [v] # parameter group 1 (apply weight_decay)
else:
pg0 += [v] # parameter group 0
for v in aux_model.parameters():
pg0 += [v] # parameter group 0
optimizer = optim.SGD(pg0,
lr=hyp['lr0'],
momentum=hyp['momentum'],
nesterov=True)
optimizer.add_param_group({
'params': pg1,
'weight_decay': hyp['weight_decay']
}) # add pg1 with weight_decay
del pg0, pg1
if chkpt['optimizer'] is not None:
optimizer.load_state_dict(chkpt['optimizer'])
del chkpt
scheduler = lr_scheduler.MultiStepLR(
optimizer, milestones=[epochs // 3, 2 * (epochs // 3)], gamma=0.1)
scheduler.last_epoch = start_epoch - 1
if device.type != 'cpu' and torch.cuda.device_count() > 1:
pruned_model = nn.parallel.DistributedDataParallel(
pruned_model, find_unused_parameters=True)
pruned_model.yolo_layers = pruned_model.module.yolo_layers
# -------------start train-------------
nb = len(train_loader)
pruned_model.nc = 80
pruned_model.hyp = hyp
pruned_model.arc = 'default'
for epoch in range(start_epoch, epochs):
# -------------register hook for model-------------
for name, child in pruned_model.module.module_list.named_children():
if name == aux_in_layer:
handle = child.register_forward_hook(
hook_util.hook_prune_output)
# -------------register hook for model-------------
pruned_model.train()
aux_model.train()
print(('\n' + '%10s' * 7) %
('Stage', 'Epoch', 'gpu_mem', 'DIoU', 'obj', 'cls', 'total'))
# -------------start batch-------------
mloss = torch.zeros(4).to(device)
pbar = tqdm(enumerate(train_loader), total=nb)
for i, (img, targets, _, _) in pbar:
if len(targets) == 0:
continue
ni = nb * epoch + i
img = img.to(device).float() / 255.0
targets = targets.to(device)
pruned_pred = pruned_model(img)
pruned_loss, pruned_loss_items = compute_loss(
pruned_pred, targets, pruned_model)
pruned_loss *= batch_size / 64
hook_util.cat_to_gpu0()
aux_pred = aux_model(hook_util.prune_features['gpu0'][0], targets)
aux_loss = compute_loss_for_DCP(aux_pred, targets)
aux_loss *= aux_loss_scalar * batch_size / 64
loss = pruned_loss + aux_loss
loss.backward()
hook_util.clean_hook_out()
if ni % accumulate == 0:
optimizer.step()
optimizer.zero_grad()
pruned_loss_items[2] += aux_loss.item()
mloss = (mloss * i + pruned_loss_items) / (i + 1)
mem = torch.cuda.memory_cached() / 1E9 if torch.cuda.is_available(
) else 0
s = ('%10s' * 3 +
'%10.3g' * 4) % ('FiTune ' + current_layer, '%g/%g' %
(epoch, epochs - 1), '%.3gG' % mem, *mloss)
pbar.set_description(s)
# -------------end batch-------------
scheduler.step()
handle.remove()
results, _ = test.test(prune_cfg,
data,
batch_size=batch_size * 2,
img_size=416,
model=pruned_model,
conf_thres=0.1,
iou_thres=0.5,
save_json=False,
dataloader=test_loader)
"""
chkpt = {'current_layer':
'epoch':
'model':
'optimizer':
'aux_in12':
'aux_in37':
'aux_in62':
'aux_in75':
'prune_guide':}
"""
chkpt = torch.load(progress_chkpt, map_location=device)
chkpt['current_layer'] = current_layer
chkpt['epoch'] = epoch
chkpt['model'] = pruned_model.module.state_dict() if type(
pruned_model
) is nn.parallel.DistributedDataParallel else pruned_model.state_dict(
)
chkpt[
'optimizer'] = None if epoch == epochs - 1 else optimizer.state_dict(
)
chkpt['aux_in{}'.format(aux_in_layer)] = aux_model.state_dict()
torch.save(chkpt, progress_chkpt)
torch.save(chkpt, last)
if epoch == epochs - 1:
torch.save(chkpt,
'../weights/DCP/backup{}.pt'.format(current_layer))
del chkpt
with open(progress_result, 'a') as f:
f.write(('%10s' * 2 + '%10.3g' * 8) %
('FiTune ' + current_layer, '%g/%g' %
(epoch, epochs - 1), *mloss, *results[:4]) + '\n')
# -------------end train-------------
torch.cuda.empty_cache()
return current_layer
def channels_select(prune_cfg, data, origin_model, aux_util, device,
data_loader, select_layer, pruned_rate):
with open(progress_result, 'a') as f:
f.write(('\n' + '%10s' * 9 + '\n') %
('Stage', 'Change', 'MSELoss', 'AuxLoss', 'Total', 'P', 'R',
'[email protected]', 'F1'))
logger.info(('%10s' * 6) %
('Stage', 'Channels', 'Batch', 'MSELoss', 'AuxLoss', 'Total'))
batch_size = data_loader.batch_size
img_size = data_loader.dataset.img_size
accumulate = 64 // batch_size
hook_util = HookUtils()
handles = []
n_iter = math.floor(500 / batch_size)
pruning_model = Darknet(prune_cfg,
img_size=(img_size, img_size)).to(device)
chkpt = torch.load(progress_chkpt, map_location=device)
pruning_model.load_state_dict(chkpt['model'], strict=True)
aux_in_layer = aux_util.conv_layer_dict[select_layer]
aux_model = aux_util.creat_aux_model(aux_in_layer)
aux_model.to(device)
aux_model.load_state_dict(chkpt['aux_in{}'.format(aux_in_layer)],
strict=True)
aux_loss_scalar = max(0.01, pow((int(aux_in_layer) + 1) / 75, 2))
del chkpt
solve_sub_problem_optimizer = optim.SGD(
pruning_model.module_list[int(aux_in_layer)].MaskConv2d.parameters(),
lr=hyp['lr0'],
momentum=hyp['momentum'])
for name, child in origin_model.module_list.named_children():
if name == aux_in_layer:
handles.append(
child.register_forward_hook(hook_util.hook_origin_output))
if name == select_layer:
handles.append(
child.register_forward_hook(hook_util.hook_origin_output))
for name, child in pruning_model.module_list.named_children():
if name == aux_in_layer:
handles.append(
child.register_forward_hook(hook_util.hook_prune_output))
if name == select_layer:
handles.append(
child.register_forward_hook(hook_util.hook_prune_output))
if device.type != 'cpu' and torch.cuda.device_count() > 1:
origin_model = torch.nn.parallel.DistributedDataParallel(
origin_model, find_unused_parameters=True)
origin_model.yolo_layers = origin_model.module.yolo_layers
pruning_model = torch.nn.parallel.DistributedDataParallel(
pruning_model, find_unused_parameters=True)
pruning_model.yolo_layers = pruning_model.module.yolo_layers
retain_channels_num = math.floor(
aux_util.layer_info[select_layer]["in_channels"] * (1 - pruned_rate))
pruning_model.nc = 80
pruning_model.hyp = hyp
pruning_model.arc = 'default'
pruning_model.eval()
aux_model.eval()
MSE = nn.MSELoss(reduction='mean')
mloss = torch.zeros(3).to(device)
for i_k in range(retain_channels_num):
data_iter = iter(data_loader)
pbar = tqdm(range(n_iter), total=n_iter)
print(('\n' + '%10s' * 6) %
('Stage', 'gpu_mem', 'channels', 'MSELoss', 'AuxLoss', 'Total'))
for i in pbar:
imgs, targets, _, _ = data_iter.next()
if len(targets) == 0:
continue
imgs = imgs.to(device).float(
) / 255.0 # uint8 to float32, 0 - 255 to 0.0 - 1.0
targets = targets.to(device)
with torch.no_grad():
_ = origin_model(imgs)
_, pruning_pred = pruning_model(imgs)
pruning_loss, _ = compute_loss(pruning_pred, targets,
pruning_model)
hook_util.cat_to_gpu0()
mse_loss = torch.zeros(1, device=device)
aux_pred = aux_model(hook_util.prune_features['gpu0'][1], targets)
aux_loss = compute_loss_for_DCP(aux_pred, targets)
mse_loss += MSE(hook_util.prune_features['gpu0'][0],
hook_util.origin_features['gpu0'][0])
loss = hyp['joint_loss'] * mse_loss + aux_loss + 0 * pruning_loss
loss.backward()
mem = torch.cuda.memory_cached() / 1E9 if torch.cuda.is_available(
) else 0
s = ('%10s' * 3 + '%10.3g' * 3) % (
'Prune ' + select_layer, '%.3gG' % mem, '%g/%g' %
(i_k, retain_channels_num), hyp['joint_loss'] * mse_loss,
aux_loss, loss)
pbar.set_description(s)
# if (i + 1) % 10 == 0:
# logger.info(('%10s' * 3 + '%10.3g' * 3) %
# ('Prune' + select_layer, str(i_k), '%g/%g' % (i, n_iter), hyp['joint_loss'] * mse_loss,
# aux_loss, loss))
hook_util.clean_hook_out()
grad = pruning_model.module.module_list[int(
select_layer)].MaskConv2d.weight.grad.detach()**2
grad = grad.sum((2, 3)).sqrt().sum(0)
if i_k == 0:
pruning_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask[:] = 1e-5
if select_layer in aux_util.sync_guide.keys():
sync_layer = aux_util.sync_guide[select_layer]
pruning_model.module.module_list[int(
sync_layer)].MaskConv2d.selected_channels_mask[(
-1 * aux_util.layer_info[select_layer]["in_channels"]
):] = 1e-5
selected_channels_mask = pruning_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask
_, indices = torch.topk(grad * (1 - selected_channels_mask), 1)
pruning_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask[indices] = 1
if select_layer in aux_util.sync_guide.keys():
pruning_model.module.module_list[int(
sync_layer)].MaskConv2d.selected_channels_mask[-(
aux_util.layer_info[select_layer]["in_channels"] -
indices)] = 1
pruning_model.zero_grad()
pbar = tqdm(range(n_iter), total=n_iter)
print(('\n' + '%10s' * 6) %
('Stage', 'gpu_mem', 'channels', 'MSELoss', 'AuxLoss', 'Total'))
for i in pbar:
imgs, targets, _, _ = data_iter.next()
if len(targets) == 0:
continue
imgs = imgs.to(device).float(
) / 255.0 # uint8 to float32, 0 - 255 to 0.0 - 1.0
targets = targets.to(device)
with torch.no_grad():
_ = origin_model(imgs)
_, pruning_pred = pruning_model(imgs)
pruning_loss, _ = compute_loss(pruning_pred, targets,
pruning_model)
hook_util.cat_to_gpu0()
mse_loss = torch.zeros(1, device=device)
aux_pred = aux_model(hook_util.prune_features['gpu0'][1], targets)
aux_loss = compute_loss_for_DCP(aux_pred, targets)
mse_loss += MSE(hook_util.prune_features['gpu0'][0],
hook_util.origin_features['gpu0'][0])
loss = hyp[
'joint_loss'] * mse_loss + aux_loss_scalar * aux_loss + 0 * pruning_loss
loss.backward()
if i % accumulate == 0:
solve_sub_problem_optimizer.step()
solve_sub_problem_optimizer.zero_grad()
mem = torch.cuda.memory_cached() / 1E9 if torch.cuda.is_available(
) else 0
mloss = (mloss * i +
torch.cat([hyp['joint_loss'] * mse_loss, aux_loss, loss
]).detach()) / (i + 1)
s = ('%10s' * 3 + '%10.3g' * 3) % (
'SubProm ' + select_layer, '%.3gG' % mem, '%g/%g' %
(i_k, retain_channels_num), *mloss)
pbar.set_description(s)
if (i + 1) % n_iter == 0:
logger.info(('%10s' * 3 + '%10.3g' * 3) %
('SubPro' + select_layer, str(i_k), '%g/%g' %
(i, n_iter), *mloss))
hook_util.clean_hook_out()
for handle in handles:
handle.remove()
greedy_indices = pruning_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask < 1
pruning_model.module.module_list[int(
select_layer)].MaskConv2d.selected_channels_mask[greedy_indices] = 0
res, _ = test.test(prune_cfg,
data,
batch_size=batch_size * 2,
img_size=416,
model=pruning_model,
conf_thres=0.1,
iou_thres=0.5,
save_json=False,
dataloader=None)
chkpt = torch.load(progress_chkpt, map_location=device)
chkpt['current_layer'] = aux_util.next_prune_layer(select_layer)
chkpt['epoch'] = -1
chkpt['model'] = pruning_model.module.state_dict() if type(
pruning_model
) is nn.parallel.DistributedDataParallel else pruning_model.state_dict()
chkpt['optimizer'] = None
torch.save(chkpt, progress_chkpt)
torch.save(chkpt, last)
del chkpt
with open(progress_result, 'a') as f:
f.write(('%10s' * 2 + '%10.3g' * 7) %
('Pruning ' + select_layer,
str(aux_util.layer_info[select_layer]['in_channels']) + '->' +
str(retain_channels_num), *mloss, *res[:4]) + '\n')
torch.cuda.empty_cache()
def train_aux_for_LCP(cfg, backbone, neck, data_loader, weights, aux_weight,
hyp, device, resume, epochs):
init_seeds()
batch_size = data_loader.batch_size
accumulate = 64 // batch_size
model = Darknet(cfg).to(device)
model_chkpt = torch.load(weights, map_location=device)
model.load_state_dict(model_chkpt['model'], strict=True)
del model_chkpt
aux_util = AuxNetUtils(model, hyp, backbone, neck, strategy="LCP")
hook_util = HookUtils()
start_epoch = 0
aux_model_list = []
pg = []
for layer in aux_util.aux_in_layer:
aux_model = aux_util.creat_aux_model(layer)
aux_model.to(device)
for v in aux_model.parameters():
pg += [v]
aux_model_list.append(aux_model)
optimizer = optim.SGD(pg,
lr=hyp['lr0'],
momentum=hyp['momentum'],
nesterov=True)
del pg
if resume:
chkpt = torch.load(aux_weight, map_location=device)
for i, layer in enumerate(aux_util.aux_in_layer):
aux_model_list[i].load_state_dict(chkpt['aux_in{}'.format(layer)],
strict=True)
if chkpt['optimizer'] is not None:
optimizer.load_state_dict(chkpt['optimizer'])
start_epoch = chkpt['epoch'] + 1
scheduler = lr_scheduler.MultiStepLR(
optimizer, milestones=[epochs // 3, 2 * epochs // 3], gamma=0.1)
scheduler.last_epoch = start_epoch - 1
handles = [] # 结束训练后handle需要回收
for name, child in model.module_list.named_children():
if name in aux_util.aux_in_layer:
handles.append(
child.register_forward_hook(hook_util.hook_origin_output))
if device.type != 'cpu' and torch.cuda.device_count() > 1:
model = nn.parallel.DistributedDataParallel(
model, find_unused_parameters=True)
model.yolo_layers = model.module.yolo_layers
nb = len(data_loader)
model.nc = 80
model.hyp = hyp
model.arc = 'default'
print('Starting training for %g epochs...' % epochs)
for epoch in range(start_epoch, epochs):
for aux_model in aux_model_list:
aux_model.train()
print(('\n' + '%10s' * 6) %
('Stage', 'Epoch', 'gpu_mem', 'AuxID', 'cls', 'targets'))
# -----------------start batch-----------------
pbar = tqdm(enumerate(data_loader), total=nb)
model.train()
for i, (imgs, targets, _, _) in pbar:
if len(targets) == 0:
continue
ni = i + nb * epoch
imgs = imgs.to(device).float(
) / 255.0 # uint8 to float32, 0 - 255 to 0.0 - 1.0
targets = targets.to(device)
with torch.no_grad():
prediction = model(imgs)
hook_util.cat_to_gpu0()
for aux_idx, aux_model in enumerate(aux_model_list):
pred, loc_loss = aux_model(
hook_util.origin_features['gpu0'][aux_idx], targets,
prediction)
loss = compute_loss_for_LCP(pred, loc_loss, targets)
loss *= batch_size / 64
loss.backward()
mem = torch.cuda.memory_cached(
) / 1E9 if torch.cuda.is_available() else 0 # (GB)
s = ('%10s' * 3 + '%10.3g' * 3) % ('Train Aux', '%g/%g' %
(epoch, epochs - 1),
'%.3gG' % mem, aux_idx,
loss, len(targets))
pbar.set_description(s)
# 每个batch后要把hook_out内容清除
hook_util.clean_hook_out()
if ni % accumulate == 0:
optimizer.step()
optimizer.zero_grad()
# -----------------end batches-----------------
scheduler.step()
final_epoch = epoch + 1 == epochs
chkpt = {
'epoch': epoch,
'optimizer': None if final_epoch else optimizer.state_dict()
}
for i, layer in enumerate(aux_util.aux_in_layer):
chkpt['aux_in{}'.format(layer)] = aux_model_list[i].state_dict()
torch.save(chkpt, aux_weight)
torch.save(chkpt, "../weights/LCP/aux-coco.pt")
del chkpt
with open("./LCP/aux_result.txt", 'a') as f:
f.write(s + '\n')
# 最后要把hook全部删除
for handle in handles:
handle.remove()
torch.cuda.empty_cache()
# %%
# Combine sample sets back together
samples = positive_samp # + negative_samp
# %%
# Load the model
img_size = (352, 608)
device = 'cuda:0'
arc = 'default'
cfg = 'cfg/yolov3-tiny-anchors.cfg'
weights = 'weights/best.pt'
device = torch_utils.select_device(device, apex=False, batch_size=64)
model = Darknet(cfg, img_size=img_size, arc=arc).to(device)
model.arc = 'default'
model.nc = 1 # num classes
model.hyp = hyp
d = torch.load(weights, map_location=device)
m = d['model']
model.load_state_dict(m)
# Build the paths and pass them to the FastAI ObjectItemList
posix_paths = json_to_paths(samples)
lst = ObjectItemList(posix_paths, label_cls=YoloCategoryList)
YoloCategoryList.anchors = [
model.module_list[l].anchors for l in model.yolo_layers
]
YoloCategoryList.img_size = img_size
# %%