def __init__(self, args):
super(BasePLModel, self).__init__()
self.args = args
self.train_loader, self.val_loader, self.test_loader = get_data_loaders(
args)
self.__build_loss()
self.train_batch_times = []
self.val_batch_times = []
def train(args):
set_seed(args.seed)
args.savedir = os.path.join(args.savedir, args.name)
os.makedirs(args.savedir, exist_ok=True)
train_loader, val_loader, test_loaders = get_data_loaders(args)
model = get_model(args)
criterion = get_criterion(args)
optimizer = get_optimizer(model, args)
scheduler = get_scheduler(optimizer, args)
logger = create_logger("%s/logfile.log" % args.savedir, args)
logger.info(model)
model.cuda()
torch.save(args, os.path.join(args.savedir, "args.pt"))
start_epoch, global_step, n_no_improve, best_metric = 0, 0, 0, -np.inf
if os.path.exists(os.path.join(args.savedir, "checkpoint.pt")):
checkpoint = torch.load(os.path.join(args.savedir, "checkpoint.pt"))
start_epoch = checkpoint["epoch"]
n_no_improve = checkpoint["n_no_improve"]
best_metric = checkpoint["best_metric"]
model.load_state_dict(checkpoint["state_dict"])
optimizer.load_state_dict(checkpoint["optimizer"])
scheduler.load_state_dict(checkpoint["scheduler"])
logger.info("Training..")
for i_epoch in range(start_epoch, args.max_epochs):
train_losses = []
model.train()
optimizer.zero_grad()
for batch in tqdm(train_loader, total=len(train_loader)):
loss, _, _ = model_forward(i_epoch, model, args, criterion, batch)
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
train_losses.append(loss.item())
loss.backward()
global_step += 1
if global_step % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
model.eval()
metrics = model_eval(i_epoch, val_loader, model, args, criterion)
logger.info("Train Loss: {:.4f}".format(np.mean(train_losses)))
log_metrics("Val", metrics, args, logger)
tuning_metric = (metrics["micro_f1"]
if args.task_type == "multilabel" else metrics["acc"])
scheduler.step(tuning_metric)
is_improvement = tuning_metric > best_metric
if is_improvement:
best_metric = tuning_metric
n_no_improve = 0
else:
n_no_improve += 1
save_checkpoint(
{
"epoch": i_epoch + 1,
"state_dict": model.state_dict(),
"optimizer": optimizer.state_dict(),
"scheduler": scheduler.state_dict(),
"n_no_improve": n_no_improve,
"best_metric": best_metric,
},
is_improvement,
args.savedir,
)
if n_no_improve >= args.patience:
logger.info("No improvement. Breaking out of loop.")
break
load_checkpoint(model, os.path.join(args.savedir, "model_best.pt"))
model.eval()
for test_name, test_loader in test_loaders.items():
model_predict(np.inf, test_loader, model, args, criterion)
test_metrics = model_eval(np.inf,
test_loader,
model,
args,
criterion,
store_preds=True)
log_metrics(f"Test - {test_name}", test_metrics, args, logger)
def train(args):
set_seed(args.seed)
args.savedir = os.path.join(args.savedir, args.name)
os.makedirs(args.savedir, exist_ok=True)
train_loader, val_loader, test_loaders = get_data_loaders(args)
model = get_model(args)
criterion = get_criterion(args)
optimizer = get_optimizer(model, args)
scheduler = get_scheduler(optimizer, args)
logger = create_logger("%s/logfile.log" % args.savedir, args)
logger.info(model)
model.cuda()
# if args.multiGPU:
# model = nn.DataParallel(model)
torch.save(args, os.path.join(args.savedir, "args.pt"))
start_epoch, global_step, n_no_improve, best_metric = 0, 0, 0, -np.inf
if os.path.exists(os.path.join(args.savedir, "checkpoint.pt")):
checkpoint = torch.load(os.path.join(args.savedir, "checkpoint.pt"))
start_epoch = checkpoint["epoch"]
n_no_improve = checkpoint["n_no_improve"]
best_metric = checkpoint["best_metric"]
model.load_state_dict(checkpoint["state_dict"])
optimizer.load_state_dict(checkpoint["optimizer"])
scheduler.load_state_dict(checkpoint["scheduler"])
logger.info("Training..")
if APEX_AVAILABLE and args.fp16:
model, optimizer = amp.initialize(
model,
optimizer,
opt_level="O2",
keep_batchnorm_fp32=True,
loss_scale="dynamic",
)
for i_epoch in range(start_epoch, args.max_epochs):
train_losses = []
model.train()
optimizer.zero_grad()
logger.info(f"total data:{len(train_loader)}")
train_batch_start = time.time()
for batch in tqdm(train_loader, total=(len(train_loader))):
loss, _, _ = model_forward(i_epoch, model, args, criterion, batch)
if args.multiGPU:
loss = loss.mean()
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
train_losses.append(loss.item())
if APEX_AVAILABLE and args.fp16:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
global_step += 1
if global_step % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
train_batch_end = time.time()
logger.info(
f"EPOCH: {i_epoch}, Train Loss: {np.mean(train_losses):.4f}, time: {(train_batch_end - train_batch_start)/60:.1f}mins"
)
eval_start = time.time()
model.eval()
metrics = model_eval(i_epoch, val_loader, model, args, criterion)
eval_end = time.time()
log_metrics("Val", metrics, args, logger)
if args.task_type == "multilabel":
tuning_metric = metrics["micro_f1"]
logger.info(
f"Val acc {tuning_metric}, time: {(eval_end - eval_start)/60:.2f}mins"
)
else:
tuning_metric = metrics["acc"]
logger.info(
f'Val acc {metrics["acc"]:.3f}, precision {metrics["prec"]:.3f}, recall {metrics["recall"]:.3f}, time: {(eval_end - eval_start)/60:.2f}mins '
)
scheduler.step(tuning_metric)
is_improvement = tuning_metric > best_metric
if is_improvement:
best_metric = tuning_metric
n_no_improve = 0
else:
n_no_improve += 1
save_checkpoint(
{
"epoch": i_epoch + 1,
"state_dict": model.state_dict(),
"optimizer": optimizer.state_dict(),
"scheduler": scheduler.state_dict(),
"n_no_improve": n_no_improve,
"best_metric": best_metric,
},
is_improvement,
args.savedir,
)
if not args.no_cuda:
torch.cuda.empty_cache()
if n_no_improve >= args.patience:
logger.info("No improvement. Breaking out of loop.")
break
load_checkpoint(model, os.path.join(args.savedir, "model_best.pt"))
model.eval()
for test_name, test_loader in test_loaders.items():
test_metrics = model_eval(np.inf,
test_loader,
model,
args,
criterion,
store_preds=True)
log_metrics(f"Test - {test_name}", test_metrics, args, logger)