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Linear LR scheduler option #2150

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Feb 6, 2021
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Linear LR scheduler option #2150

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4186ba4
Linear LR scheduler option
glenn-jocher Feb 6, 2021
c4aa85c
Update train.py
glenn-jocher Feb 6, 2021
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Linear LR scheduler option
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@glenn-jocher
glenn-jocher authored Feb 6, 2021
commit 4186ba4441fc3abcc8835a4a526812090458a517
6 changes: 5 additions & 1 deletion train.py
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Expand Up @@ -120,7 +120,10 @@ def train(hyp, opt, device, tb_writer=None, wandb=None):

# Scheduler https://arxiv.org/pdf/1812.01187.pdf
# https://pytorch.org/docs/stable/_modules/torch/optim/lr_scheduler.html#OneCycleLR
lf = one_cycle(1, hyp['lrf'], epochs) # cosine 1->hyp['lrf']
if opt.linear_lr:
lf = lambda x: (1 - x / (epochs - 1)) * (1.0 - hyp['lrf']) + hyp['lrf'] # linear
else:
lf = one_cycle(1, hyp['lrf'], epochs) # cosine 1->hyp['lrf']
scheduler = lr_scheduler.LambdaLR(optimizer, lr_lambda=lf)
# plot_lr_scheduler(optimizer, scheduler, epochs)

Expand Down Expand Up @@ -464,6 +467,7 @@ def train(hyp, opt, device, tb_writer=None, wandb=None):
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')
opt = parser.parse_args()

# Set DDP variables
Expand Down