def train(self, dataset, dataset_eval=None):
# Obtain needed information
data_size = dataset.data_size
token_size = dataset.token_size
ans_size = dataset.ans_size
pretrained_emb = dataset.pretrained_emb
# Define the MCAN model
net = Net(self.__C, pretrained_emb, token_size, ans_size)
net.cuda()
net.train()
# Define the Question-only model
qnet = QNet(self.__C, pretrained_emb, token_size, ans_size)
qnet.cuda()
qnet.train()
# Watch net & qnet
wandb.watch(net)
wandb.watch(qnet)
# Define the multi-gpu training if needed
if self.__C.N_GPU > 1:
net = nn.DataParallel(net, device_ids=self.__C.DEVICES)
# Define the binary cross entropy loss
# loss_fn = torch.nn.BCELoss(size_average=False).cuda()
loss_qm = torch.nn.BCELoss(reduction='sum').cuda()
loss_qo = torch.nn.BCELoss(reduction='sum').cuda()
# Load checkpoint if resume training
if self.__C.RESUME: # default -> FALSE
print(' ========== Resume training')
if self.__C.CKPT_PATH is not None:
print('Warning: you are now using CKPT_PATH args, '
'CKPT_VERSION and CKPT_EPOCH will not work')
path = self.__C.CKPT_PATH
else:
path = self.__C.CKPTS_PATH + \
'ckpt_' + self.__C.CKPT_VERSION + \
'/epoch' + str(self.__C.CKPT_EPOCH) + '.pkl'
# Load the network parameters
print('Loading ckpt {}'.format(path))
ckpt = torch.load(path)
print('Finish!')
net.load_state_dict(ckpt['state_dict'])
# Load the optimizer paramters
#params = list(net.parameters()) + list(qnet.parameters())
optim = get_optim(self.__C, net, data_size, ckpt['lr_base'])
optim._step = int(data_size / self.__C.BATCH_SIZE *
self.__C.CKPT_EPOCH)
optim.optimizer.load_state_dict(ckpt['optimizer'])
start_epoch = self.__C.CKPT_EPOCH
else:
if ('ckpt_' + self.__C.VERSION) in os.listdir(self.__C.CKPTS_PATH):
shutil.rmtree(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
os.mkdir(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
#params = net.parameters() + qnet.parameters()
optim = get_optim(self.__C, net, data_size)
optim_q = get_optim(self.__C, qnet, data_size)
start_epoch = 0
loss_sum = 0
L_qo_sum = 0
L_qm_sum = 0
named_params = list(net.named_parameters()) + list(
qnet.named_parameters())
grad_norm = np.zeros(len(named_params))
# Define multi-thread dataloader
if self.__C.SHUFFLE_MODE in ['external']:
dataloader = Data.DataLoader(dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=False,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True)
else:
dataloader = Data.DataLoader(dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=True,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True)
# Training script
for epoch in range(start_epoch, self.__C.MAX_EPOCH):
# Save log information
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
logfile.write(
'nowTime: ' +
datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + '\n')
logfile.close()
# Learning Rate Decay
if epoch in self.__C.LR_DECAY_LIST:
adjust_lr(optim, self.__C.LR_DECAY_R)
adjust_lr(optim_q, self.__C.LR_DECAY_R)
# Externally shuffle
if self.__C.SHUFFLE_MODE == 'external':
shuffle_list(dataset.ans_list)
time_start = time.time()
# Iteration
for step, (img_feat_iter, ques_ix_iter,
ans_iter) in enumerate(dataloader):
optim.zero_grad()
optim_q.zero_grad()
img_feat_iter = img_feat_iter.cuda()
ques_ix_iter = ques_ix_iter.cuda()
ans_iter = ans_iter.cuda()
for accu_step in range(self.__C.GRAD_ACCU_STEPS):
sub_img_feat_iter = \
img_feat_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ques_ix_iter = \
ques_ix_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ans_iter = \
ans_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
out, q_emb, lang_feat_mask = net(sub_img_feat_iter,
sub_ques_ix_iter)
pred_qo, q_out = qnet(q_emb, lang_feat_mask)
#print(pred_qo.shape, sub_ans_iter.shape)
#print(torch.argmax(sub_ans_iter.long(), dim=1))
ans_idx = torch.argmax(sub_ans_iter.long(), dim=1)
pred_idx = torch.argmax(
pred_qo.long(),
dim=1) # predicted answer index from QO
qo_scale = pred_qo.detach().clone()
for i in range(self.__C.SUB_BATCH_SIZE):
if (ans_idx[i] == pred_idx[i]):
qo_scale[i, :] = torch.ones(3129)
L_qo = loss_qo(q_out, sub_ans_iter)
L_qm = loss_qm(
torch.sigmoid(out * torch.sigmoid(qo_scale)),
sub_ans_iter)
#L_qo = loss_qo(q_out, sub_ans_iter)
#L_qm = loss_qm(torch.sigmoid(out*torch.sigmoid(pred_qo)), sub_ans_iter)
loss = L_qo + L_qm
# only mean-reduction needs be divided by grad_accu_steps
# removing this line wouldn't change our results because the speciality of Adam optimizer,
# but would be necessary if you use SGD optimizer.
# loss /= self.__C.GRAD_ACCU_STEPS
loss.backward()
loss_sum += loss.cpu().data.numpy(
) * self.__C.GRAD_ACCU_STEPS
L_qo_sum += L_qo.cpu().data.numpy(
) * self.__C.GRAD_ACCU_STEPS
L_qm_sum += L_qm.cpu().data.numpy(
) * self.__C.GRAD_ACCU_STEPS
wandb.log({
"Training loss":
loss.cpu().data.numpy() / self.__C.SUB_BATCH_SIZE,
"Question only loss":
L_qo.cpu().data.numpy() / self.__C.SUB_BATCH_SIZE,
"Fusion loss":
L_qm.cpu().data.numpy() / self.__C.SUB_BATCH_SIZE
}) # Tracking training loss
if self.__C.VERBOSE: # print loss every step -> TRUE
if dataset_eval is not None:
mode_str = self.__C.SPLIT[
'train'] + '->' + self.__C.SPLIT['val']
else:
mode_str = self.__C.SPLIT[
'train'] + '->' + self.__C.SPLIT['test']
print(
"\r[version %s][epoch %2d][step %4d/%4d][%s] loss: %.4f, lr: %.2e"
% (self.__C.VERSION, epoch + 1, step,
int(data_size / self.__C.BATCH_SIZE), mode_str,
loss.cpu().data.numpy() /
self.__C.SUB_BATCH_SIZE, optim._rate),
end=' ')
# Gradient norm clipping
if self.__C.GRAD_NORM_CLIP > 0:
nn.utils.clip_grad_norm_(net.parameters(),
self.__C.GRAD_NORM_CLIP)
# Save the gradient information
for name in range(len(named_params)):
norm_v = torch.norm(named_params[name][1].grad).cpu().data.numpy() \
if named_params[name][1].grad is not None else 0
grad_norm[name] += norm_v * self.__C.GRAD_ACCU_STEPS
# print('Param %-3s Name %-80s Grad_Norm %-20s'%
# (str(grad_wt),
# params[grad_wt][0],
# str(norm_v)))
optim.step()
optim_q.step()
time_end = time.time()
print('Finished in {}s'.format(int(time_end - time_start)))
# print('')
epoch_finish = epoch + 1
# Save checkpoint
state = {
'state_dict': net.state_dict(),
'optimizer': optim.optimizer.state_dict(),
'lr_base': optim.lr_base
}
torch.save(
state, self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION +
'/epoch' + str(epoch_finish) + '.pkl')
# Logging
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
logfile.write('epoch = ' + str(epoch_finish) + ' Q loss = ' +
str(L_qo_sum / data_size) + ' fusion loss = ' +
str(L_qm_sum / data_size) + ' loss = ' +
str(loss_sum / data_size) + '\n' + 'lr = ' +
str(optim._rate) + '\n\n')
logfile.close()
# Eval after every epoch
if dataset_eval is not None:
self.eval(dataset_eval,
state_dict=net.state_dict(),
valid=True)
# if self.__C.VERBOSE:
# logfile = open(
# self.__C.LOG_PATH +
# 'log_run_' + self.__C.VERSION + '.txt',
# 'a+'
# )
# for name in range(len(named_params)):
# logfile.write(
# 'Param %-3s Name %-80s Grad_Norm %-25s\n' % (
# str(name),
# named_params[name][0],
# str(grad_norm[name] / data_size * self.__C.BATCH_SIZE)
# )
# )
# logfile.write('\n')
# logfile.close()
loss_sum = 0
L_qo_sum = 0
L_qm_sum = 0
grad_norm = np.zeros(len(named_params))
def train(self, dataset, dataset_eval=None):
#1.3 首先训练的开始前要获取需要的信息，数据集大小，数据集的问题嵌入大小，答案大小，文本嵌入向量
data_size = dataset.data_size
token_size = dataset.token_size #18405
ans_size = dataset.ans_size
pretrained_emb = dataset.pretrained_emb
#1.4 需要的信息获取后，开始定义MCAN模型，传入需要的参数，输出：多模态融合特征 proj_feat
net = Net(self.__C, pretrained_emb, token_size, ans_size)
net.cuda()
net.train() # 1.5 调用train进行训练，这步的前一步是？后一步是？
# 如果需要的话，定义多gpu训练
if self.__C.N_GPU > 1:
net = nn.DataParallel(net, device_ids=self.__C.DEVICES)
loss_fn = torch.nn.BCELoss(reduction='sum').cuda()
# 如果恢复训练，则加载检查点
if self.__C.RESUME:
print(' ========== 恢复性训练 ==========')
if self.__C.CKPT_PATH is not None:
print('警告:您现在正在使用CKPT_PATH参数，CKPT_VERSION和CKPT_EPOCH不能工作')
path = self.__C.CKPT_PATH #此处要设置ckpt_path的目录，不能为None
else:
path = self.__C.CKPTS_PATH + \
'ckpt_' + self.__C.CKPT_VERSION + \
'/epoch' + str(self.__C.CKPT_EPOCH) + '.pkl'
# 加载模型网络参数
print('加载ckpt {} 文件'.format(path))
ckpt = torch.load(path)
print('参数加载完成!')
#...............state_dict这里存什么数据.............
net.load_state_dict(ckpt['state_dict'])
# 加载优化器参数
optim = get_optim(self.__C, net, data_size, ckpt['lr_base'])
optim._step = int(data_size / self.__C.BATCH_SIZE *
self.__C.CKPT_EPOCH)
optim.optimizer.load_state_dict(ckpt['optimizer'])
# epoch
start_epoch = self.__C.CKPT_EPOCH
# 如果不恢复训练，则重新训练
else:
if ('ckpt_' + self.__C.VERSION) in os.listdir(self.__C.CKPTS_PATH):
shutil.rmtree(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
os.mkdir(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
optim = get_optim(self.__C, net, data_size)
start_epoch = 0
loss_sum = 0
named_params = list(net.named_parameters()) # 参数名称
grad_norm = np.zeros(len(named_params)) # 梯度规范化
# 定义多线程数据加载 dataloader
if self.__C.SHUFFLE_MODE in ['external']:
dataloader = Data.DataLoader(
dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=False,
num_workers=self.__C.NUM_WORKERS, # 进程数
pin_memory=self.__C.PIN_MEM,
drop_last=True)
else:
dataloader = Data.DataLoader(dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=True,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True)
# 训练过程 这里max_epoch我设置为1
for epoch in range(start_epoch, self.__C.MAX_EPOCH):
# 保存日志信息
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
# 写入日志信息
logfile.write(
'nowTime: ' +
datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + '\n')
logfile.close()
# 学习率衰减
if epoch in self.__C.LR_DECAY_LIST:
adjust_lr(optim, self.__C.LR_DECAY_R)
# Externally shuffle
if self.__C.SHUFFLE_MODE == 'external':
shuffle_list(dataset.ans_list)
time_start = time.time()
# 迭代的加载 图像特征迭代器，问题特征迭代器，答案迭代器
for step, (img_feat_iter, ques_ix_iter,
ans_iter) in enumerate(dataloader):
optim.zero_grad() # 梯度清零
img_feat_iter = img_feat_iter.cuda()
ques_ix_iter = ques_ix_iter.cuda()
ans_iter = ans_iter.cuda()
# grad_accu_steps:累计梯度，来解决本地显存不足的问题，
# 其是变相扩大batchsize，如果batch_size=6,样本总量为24，grad_acc_steps=2
# 那么参数更新次数为24/6=4，如果减小batch_size = 6/2=3，则参数更新次数不变
for accu_step in range(self.__C.GRAD_ACCU_STEPS):
sub_img_feat_iter = \
img_feat_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ques_ix_iter = \
ques_ix_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ans_iter = \
ans_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
pred = net(
sub_img_feat_iter, #[5,100,2048]
sub_ques_ix_iter # [5,14]
)
loss = loss_fn(pred, sub_ans_iter)
# 只有平均减少需要被grad_accu_steps划分
loss.backward() # 反向传播，计算当前梯度
loss_sum += loss.cpu().data.numpy(
) * self.__C.GRAD_ACCU_STEPS
# 输出每个train的loss
if self.__C.VERBOSE:
if dataset_eval is not None:
mode_str = self.__C.SPLIT['train']
else:
mode_str = self.__C.SPLIT[
'train'] + '->' + self.__C.SPLIT['train']
print(
"\r[version %s][epoch %2d][step %4d/%4d][%s] loss: %.4f, lr: %.2e"
% (self.__C.VERSION, epoch + 1, step,
int(data_size / self.__C.BATCH_SIZE), mode_str,
loss.cpu().data.numpy() /
self.__C.SUB_BATCH_SIZE, optim._rate),
end=' ')
# Gradient norm clipping 梯度标准剪裁
if self.__C.GRAD_NORM_CLIP > 0:
nn.utils.clip_grad_norm_(net.parameters(),
self.__C.GRAD_NORM_CLIP)
# 保存梯度下降信息
for name in range(len(named_params)):
norm_v = torch.norm(named_params[name][1].grad).cpu().data.numpy() \
if named_params[name][1].grad is not None else 0
grad_norm[name] += norm_v * self.__C.GRAD_ACCU_STEPS
optim.step()
# with open('One_epoch_data.txt','w') as F:
# F.write(net.state_dict()+optim.optimizer.state_dict()+optim.lr_base)
time_end = time.time()
print('Finished in {}s'.format(int(time_end - time_start)))
# print('')
epoch_finish = epoch + 1
# 保存检查点
state = {
'state_dict': net.state_dict(),
'optimizer': optim.optimizer.state_dict(),
'lr_base': optim.lr_base
}
print("===========训练模型的state=====")
print(state)
torch.save(
state, self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION +
'/epoch' + str(epoch_finish) + '.pkl')
# 打开日志文件
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
logfile.write('epoch = ' + str(epoch_finish) + ' loss = ' +
str(loss_sum / data_size) + '\n' + 'lr = ' +
str(optim._rate) + '\n\n')
logfile.close()
# 每个epoch后，进行模型评估，调用评估函数
if dataset_eval is not None:
self.eval(dataset_eval,
state_dict=net.state_dict(),
valid=True)
loss_sum = 0
grad_norm = np.zeros(len(named_params))
def train(self, dataset):
net = Net(
self.__C,
)
net.cuda()
net.train()
#Create checkpoint
if ('ckpt_' + self.__C.VERSION) in os.listdir(self.__C.CKPTS_PATH):
shutil.rmtree(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
os.mkdir(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
loader_params = {'batch_size': 16, 'num_gpus':1}
dataloader = TheLoader.from_dataset(dataset, **loader_params)
loss_sum = 0
named_params = list(net.named_parameters())
grad_norm = np.zeros(len(named_params))
loss_fn = torch.nn.NLLLoss().cuda()
# Load checkpoint if resume training
if self.__C.RESUME:
print(' ========== Resume training')
path = self.__C.CKPTS_PATH + \
'ckpt_' + self.__C.CKPT_VERSION + \
'/epoch' + str(self.__C.CKPT_EPOCH) + '.pkl'
# Load the network parameters
print('Loading ckpt {}'.format(path))
ckpt = torch.load(path)
print('Finish!')
net.load_state_dict(ckpt['state_dict'])
# Load the optimizer paramters
optim = get_optim(self.__C, net, len(dataloader), ckpt['lr_base'])
optim._step = int(len(dataloader) / self.__C.BATCH_SIZE * self.__C.CKPT_EPOCH)
optim.optimizer.load_state_dict(ckpt['optimizer'])
start_epoch = self.__C.CKPT_EPOCH
else:
optim = get_optim(self.__C, net, len(dataloader))
start_epoch = 0
for epoch in range(start_epoch, self.__C.MAX_EPOCH):
print("Training epoch...", epoch)
# Learning Rate Decay
if epoch in self.__C.LR_DECAY_LIST:
adjust_lr(optim, self.__C.LR_DECAY_R)
time_start = time.time()
print("time_start:" , time_start)
pred_argmax = []
for b, (time_per_batch, batch) in enumerate(time_batch(dataloader)):
optim.zero_grad()
x, goldsentence = net(**batch)
goldsentence = goldsentence[:, 1:]
x = x[:,:31,:]
pred_argmax = np.argmax(x.cpu().data.numpy(), axis=2)
loss = loss_fn(x.permute(0,2,1), goldsentence)
loss /= self.__C.GRAD_ACCU_STEPS
loss.backward()
loss_sum += loss.cpu().data.numpy() * self.__C.GRAD_ACCU_STEPS
mode_str = self.__C.SPLIT['train']
print("\r[version %s][epoch %2d][%s] loss: %.4f, lr: %.2e" % (
self.__C.VERSION,
epoch + 1,
mode_str,
loss.cpu().data.numpy() / self.__C.SUB_BATCH_SIZE,
optim._rate
), end=' ')
# Gradient norm clipping
if self.__C.GRAD_NORM_CLIP > 0:
nn.utils.clip_grad_norm_(
net.parameters(),
self.__C.GRAD_NORM_CLIP
)
# Save the gradient information
for name in range(len(named_params)):
norm_v = torch.norm(named_params[name][1].grad).cpu().data.numpy() \
if named_params[name][1].grad is not None else 0
grad_norm[name] += norm_v * self.__C.GRAD_ACCU_STEPS
optim.step()
time_end = time.time()
print('Finished in {}s'.format(int(time_end-time_start)))
epoch_finish = epoch + 1
loss_sum = 0
grad_norm = np.zeros(len(named_params))
# Save checkpoint
state = {
'state_dict': net.state_dict(),
'optimizer': optim.optimizer.state_dict(),
'lr_base': optim.lr_base
}
torch.save(
state,
self.__C.CKPTS_PATH +
'ckpt_' + self.__C.VERSION +
'/epoch' + str(epoch_finish) +
'.pkl'
)
print("Gold sentence: " , str(goldsentence.cpu().data))
print("A sample prediction: ", pred_argmax )
print("Checkpoint saved. " )
def train(self, dataset, dataset_eval=None):
# Obtain needed information
data_size = dataset.data_size
token_size = dataset.token_size
ans_size = dataset.ans_size
pretrained_emb = dataset.pretrained_emb
# Define the MCAN model
net = Net(
self.__C,
pretrained_emb,
token_size,
ans_size
)
net.cuda()
net.train()
# Define the multi-gpu training if needed
if self.__C.N_GPU > 1:
net = nn.DataParallel(net, device_ids=self.__C.DEVICES)
# Define the binary cross entropy loss
# loss_fn = torch.nn.BCELoss(size_average=False).cuda()
loss_fn = torch.nn.BCELoss(reduction='sum').cuda()
# Load checkpoint if resume training
if self.__C.RESUME:
print(' ========== Resume training')
if self.__C.CKPT_PATH is not None:
print('Warning: you are now using CKPT_PATH args, '
'CKPT_VERSION and CKPT_EPOCH will not work')
path = self.__C.CKPT_PATH
else:
path = self.__C.CKPTS_PATH + \
'ckpt_' + self.__C.CKPT_VERSION + \
'/epoch' + str(self.__C.CKPT_EPOCH) + '.pkl'
# Load the network parameters
print('Loading ckpt {}'.format(path))
ckpt = torch.load(path)
print('Finish!')
net.load_state_dict(ckpt['state_dict'])
# Load the optimizer paramters
optim = get_optim(self.__C, net, data_size, ckpt['lr_base'])
optim._step = int(data_size / self.__C.BATCH_SIZE * self.__C.CKPT_EPOCH)
optim.optimizer.load_state_dict(ckpt['optimizer'])
start_epoch = self.__C.CKPT_EPOCH
else:
if ('ckpt_' + self.__C.VERSION) in os.listdir(self.__C.CKPTS_PATH):
shutil.rmtree(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
os.mkdir(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
optim = get_optim(self.__C, net, data_size)
start_epoch = 0
loss_sum = 0
named_params = list(net.named_parameters())
grad_norm = np.zeros(len(named_params))
# Define multi-thread dataloader
if self.__C.SHUFFLE_MODE in ['external']:
dataloader = Data.DataLoader(
dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=False,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True
)
else:
dataloader = Data.DataLoader(
dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=True,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True
)
# Training script
for epoch in range(start_epoch, self.__C.MAX_EPOCH):
# Save log information
logfile = open(
self.__C.LOG_PATH +
'log_run_' + self.__C.VERSION + '.txt',
'a+'
)
logfile.write(
'nowTime: ' +
datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') +
'\n'
)
logfile.close()
# Learning Rate Decay
if epoch in self.__C.LR_DECAY_LIST:
adjust_lr(optim, self.__C.LR_DECAY_R)
# Externally shuffle
if self.__C.SHUFFLE_MODE == 'external':
shuffle_list(dataset.ans_list)
time_start = time.time()
# Iteration
for step, (
img_feat_iter,
ques_ix_iter,
ans_iter,
fact_idx_iter,
) in enumerate(dataloader):
optim.zero_grad()
img_feat_iter = img_feat_iter.cuda()
ques_ix_iter = ques_ix_iter.cuda()
ans_iter = ans_iter.cuda()
fact_idx_iter = fact_idx_iter.cuda()
for accu_step in range(self.__C.GRAD_ACCU_STEPS):
sub_img_feat_iter = \
img_feat_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ques_ix_iter = \
ques_ix_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_ans_iter = \
ans_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
sub_fact_idx_iter = \
fact_idx_iter[accu_step * self.__C.SUB_BATCH_SIZE:
(accu_step + 1) * self.__C.SUB_BATCH_SIZE]
pred = net(
sub_img_feat_iter,
sub_ques_ix_iter,
sub_fact_idx_iter,
)
loss = loss_fn(pred, sub_ans_iter)
loss /= self.__C.GRAD_ACCU_STEPS
loss.backward()
loss_sum += loss.cpu().data.numpy() * self.__C.GRAD_ACCU_STEPS
if self.__C.VERBOSE:
if dataset_eval is not None:
mode_str = self.__C.SPLIT['train'] + '->' + self.__C.SPLIT['val']
else:
mode_str = self.__C.SPLIT['train'] + '->' + self.__C.SPLIT['test']
print("\r[version %s][epoch %2d][step %4d/%4d][%s] loss: %.4f, lr: %.2e" % (
self.__C.VERSION,
epoch + 1,
step,
int(data_size / self.__C.BATCH_SIZE),
mode_str,
loss.cpu().data.numpy() / self.__C.SUB_BATCH_SIZE,
optim._rate
), end=' ')
# Gradient norm clipping
if self.__C.GRAD_NORM_CLIP > 0:
nn.utils.clip_grad_norm_(
net.parameters(),
self.__C.GRAD_NORM_CLIP
)
# Save the gradient information
for name in range(len(named_params)):
norm_v = torch.norm(named_params[name][1].grad).cpu().data.numpy() \
if named_params[name][1].grad is not None else 0
grad_norm[name] += norm_v * self.__C.GRAD_ACCU_STEPS
# print('Param %-3s Name %-80s Grad_Norm %-20s'%
# (str(grad_wt),
# params[grad_wt][0],
# str(norm_v)))
optim.step()
time_end = time.time()
print('Finished in {}s'.format(int(time_end-time_start)))
# print('')
epoch_finish = epoch + 1
# Save checkpoint
state = {
'state_dict': net.state_dict(),
'optimizer': optim.optimizer.state_dict(),
'lr_base': optim.lr_base
}
torch.save(
state,
self.__C.CKPTS_PATH +
'ckpt_' + self.__C.VERSION +
'/epoch' + str(epoch_finish) +
'.pkl'
)
# Logging
logfile = open(
self.__C.LOG_PATH +
'log_run_' + self.__C.VERSION + '.txt',
'a+'
)
logfile.write(
'epoch = ' + str(epoch_finish) +
' loss = ' + str(loss_sum / data_size) +
'\n' +
'lr = ' + str(optim._rate) +
'\n\n'
)
logfile.close()
# Eval after every epoch
if dataset_eval is not None:
self.eval(
dataset_eval,
state_dict=net.state_dict(),
valid=True
)
# if self.__C.VERBOSE:
# logfile = open(
# self.__C.LOG_PATH +
# 'log_run_' + self.__C.VERSION + '.txt',
# 'a+'
# )
# for name in range(len(named_params)):
# logfile.write(
# 'Param %-3s Name %-80s Grad_Norm %-25s\n' % (
# str(name),
# named_params[name][0],
# str(grad_norm[name] / data_size * self.__C.BATCH_SIZE)
# )
# )
# logfile.write('\n')
# logfile.close()
loss_sum = 0
grad_norm = np.zeros(len(named_params))
def train(self, dataset, dataset_eval=None):
super_time_start = time.time()
# Obtain needed information
data_size = dataset.data_size
token_size = dataset.token_size
ans_size = dataset.ans_size
pretrained_emb = dataset.pretrained_emb
# Define the MCAN model
net = Net(self.__C, pretrained_emb, token_size, ans_size)
net.cuda()
net.train()
# Define the binary cross entropy loss
loss_fn = torch.nn.BCELoss(reduction='sum').cuda()
# Load checkpoint if resume training
if self.__C.RESUME:
print('========== Resume training')
if self.__C.CKPT_PATH is not None:
print(
'Warning: you are now using CKPT_PATH args, CKPT_VERSION and CKPT_EPOCH will not work'
)
path = self.__C.CKPT_PATH
else:
path = self.__C.CKPTS_PATH + 'ckpt_' + self.__C.CKPT_VERSION \
+ '/epoch' + str(self.__C.CKPT_EPOCH) + '.pkl'
# Load the network parameters
print('========== Loading ckpt {}'.format(path))
ckpt = torch.load(path)
print('========== Finished!')
net.load_state_dict(ckpt['state_dict'])
# Load the optimizer parameters
optim = get_optim(self.__C, net, data_size, ckpt['lr_base'])
optim._step = int(data_size / self.__C.BATCH_SIZE *
self.__C.CKPT_EPOCH)
optim.optimizer.load_state_dict(ckpt['optimizer'])
start_epoch = self.__C.CKPT_EPOCH
else:
if ('ckpt_' + self.__C.VERSION) in os.listdir(self.__C.CKPTS_PATH):
shutil.rmtree(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
os.mkdir(self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION)
optim = get_optim(self.__C, net, data_size)
start_epoch = 0
loss_sum = 0
named_params = list(net.named_parameters())
grad_norm = np.zeros(len(named_params))
# Define multi-thread dataloader
dataloader = Data.DataLoader(dataset,
batch_size=self.__C.BATCH_SIZE,
shuffle=False,
num_workers=self.__C.NUM_WORKERS,
pin_memory=self.__C.PIN_MEM,
drop_last=True)
# Training script
for epoch in range(start_epoch, self.__C.MAX_EPOCH):
epoch_finish = epoch + 1
# Save log information
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
logfile.write(
'nowTime: ' +
datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + '\n')
logfile.close()
# Learning Rate Decay
if epoch in self.__C.LR_DECAY_LIST:
adjust_lr(optim, self.__C.LR_DECAY_R)
# Externally shuffle
shuffle_list(dataset.ans_list)
time_start = time.time()
# Iteration
for step, (img_feat_iter, ques_ix_iter,
ans_iter) in enumerate(dataloader):
optim.zero_grad()
img_feat_iter = img_feat_iter.cuda()
ques_ix_iter = ques_ix_iter.cuda()
ans_iter = ans_iter.cuda()
pred = net(img_feat_iter, ques_ix_iter)
loss = loss_fn(pred, ans_iter)
loss.backward()
loss_sum += loss.cpu().data.numpy()
if self.__C.VERBOSE: # print loss every step
if dataset_eval is not None:
mode_str = self.__C.SPLIT[
'train'] + '->' + self.__C.SPLIT['val']
else:
mode_str = self.__C.SPLIT[
'train'] + '->' + self.__C.SPLIT['test']
print(
"\r[version %s][epoch %2d][step %4d/%4d][%s] loss: %.4f, lr: %.2e"
% (self.__C.VERSION, epoch_finish, step,
int(data_size / self.__C.BATCH_SIZE), mode_str,
loss.cpu().data.numpy() / self.__C.BATCH_SIZE,
optim._rate),
end=' ')
# Save the gradient information
for name in range(len(named_params)):
if named_params[name][1].grad is not None:
norm_v = torch.norm(
named_params[name][1].grad).cpu().data.numpy()
else:
norm_v = 0
grad_norm[name] += norm_v
optim.step()
time_end = time.time()
print('========== Finished in {}s'.format(
int(time_end - time_start)))
# Save checkpoint
state = {
'state_dict': net.state_dict(),
'optimizer': optim.optimizer.state_dict(),
'lr_base': optim.lr_base
}
torch.save(
state, self.__C.CKPTS_PATH + 'ckpt_' + self.__C.VERSION +
'/epoch' + str(epoch_finish) + '.pkl')
# Logging
logfile = open(
self.__C.LOG_PATH + 'log_run_' + self.__C.VERSION + '.txt',
'a+')
logfile.write('epoch = ' + str(epoch_finish) + ' loss = ' +
str(loss_sum / data_size) + '\n' + 'lr = ' +
str(optim._rate) + '\n\n')
logfile.close()
# Eval after every epoch
if dataset_eval is not None:
self.eval(dataset_eval,
state_dict=net.state_dict(),
valid=True)
loss_sum = 0
grad_norm = np.zeros(len(named_params))
print('========== Total Training time is {}s'.format(
int(time.time() - super_time_start)))