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fix a little bug about resume #1628

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Merged
merged 2 commits into from
Dec 19, 2019
Merged

fix a little bug about resume #1628

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4e24578
fix a little bug about resume
kangkang59812 Dec 2, 2019
7bb3ed1
the second way for resuming
kangkang59812 Dec 3, 2019
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11 changes: 7 additions & 4 deletions references/detection/train.py
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Original file line number Diff line number Diff line change
Expand Up @@ -108,20 +108,21 @@ def main(args):

# lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, step_size=args.lr_step_size, gamma=args.lr_gamma)
lr_scheduler = torch.optim.lr_scheduler.MultiStepLR(optimizer, milestones=args.lr_steps, gamma=args.lr_gamma)

if args.resume:
checkpoint = torch.load(args.resume, map_location='cpu')
model_without_ddp.load_state_dict(checkpoint['model'])
optimizer.load_state_dict(checkpoint['optimizer'])
lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])

args.start_epoch = checkpoint['epoch'] + 1

if args.test_only:
evaluate(model, data_loader_test, device=device)
return

print("Start training")
start_time = time.time()
for epoch in range(args.epochs):
for epoch in range(args.start_epoch, args.epochs):
if args.distributed:
train_sampler.set_epoch(epoch)
train_one_epoch(model, optimizer, data_loader, device, epoch, args.print_freq)
Expand All @@ -131,7 +132,8 @@ def main(args):
'model': model_without_ddp.state_dict(),
'optimizer': optimizer.state_dict(),
'lr_scheduler': lr_scheduler.state_dict(),
'args': args},
'args': args,
'epoch': epoch},
os.path.join(args.output_dir, 'model_{}.pth'.format(epoch)))

# evaluate after every epoch
Expand Down Expand Up @@ -171,6 +173,7 @@ def main(args):
parser.add_argument('--print-freq', default=20, type=int, help='print frequency')
parser.add_argument('--output-dir', default='.', help='path where to save')
parser.add_argument('--resume', default='', help='resume from checkpoint')
parser.add_argument('--start_epoch', default=0, type=int, help='start epoch')
parser.add_argument('--aspect-ratio-group-factor', default=3, type=int)
parser.add_argument(
"--test-only",
Expand Down