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Switch default LR scheduler from cos to linear #6729

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Merged
glenn-jocher merged 2 commits into from
Feb 21, 2022
Merged

Switch default LR scheduler from cos to linear #6729

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e63ac5b
Switch default LR scheduler from cos to linear
glenn-jocher Feb 21, 2022
312622e
linear bug fix
glenn-jocher Feb 21, 2022
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8 changes: 4 additions & 4 deletions train.py
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Original file line number Diff line number Diff line change
Expand Up @@ -176,10 +176,10 @@ def train(hyp, # path/to/hyp.yaml or hyp dictionary
del g0, g1, g2

# Scheduler
if opt.linear_lr:
lf = lambda x: (1 - x / (epochs - 1)) * (1.0 - hyp['lrf']) + hyp['lrf'] # linear
else:
if opt.cos_lr:
lf = one_cycle(1, hyp['lrf'], epochs) # cosine 1->hyp['lrf']
else:
lf = lambda x: (1 - x / epochs) * (1.0 - hyp['lrf']) + hyp['lrf'] # linear
scheduler = lr_scheduler.LambdaLR(optimizer, lr_lambda=lf) # plot_lr_scheduler(optimizer, scheduler, epochs)

# EMA
Expand Down Expand Up @@ -479,7 +479,7 @@ def parse_opt(known=False):
parser.add_argument('--name', default='exp', help='save to project/name')
parser.add_argument('--exist-ok', action='store_true', help='existing project/name ok, do not increment')
parser.add_argument('--quad', action='store_true', help='quad dataloader')
parser.add_argument('--linear-lr', action='store_true', help='linear LR')
parser.add_argument('--cos-lr', action='store_true', help='cosine LR scheduler')
parser.add_argument('--label-smoothing', type=float, default=0.0, help='Label smoothing epsilon')
parser.add_argument('--patience', type=int, default=100, help='EarlyStopping patience (epochs without improvement)')
parser.add_argument('--freeze', nargs='+', type=int, default=[0], help='Freeze layers: backbone=10, first3=0 1 2')
Expand Down