configs/_base_/schedules/schedule_sgd_1500e.py

# optimizer
optimizer = dict(type='SGD', lr=1e-3, momentum=0.90, weight_decay=5e-4)
optimizer_config = dict(grad_clip=None)
lr_config = dict(policy='poly', power=0.9, min_lr=1e-7, by_epoch=True)
total_epochs = 1500