mmpretrain/configs/_base_/schedules/cifar10_bs128.py

# Copyright (c) OpenMMLab. All rights reserved.
# This is a BETA new format config file, and the usage may change recently.
from mmengine.optim import MultiStepLR
from torch.optim import SGD

# optimizer
optim_wrapper = dict(
    optimizer=dict(type=SGD, lr=0.1, momentum=0.9, weight_decay=0.0001))
# learning policy
param_scheduler = dict(
    type=MultiStepLR, by_epoch=True, milestones=[100, 150], gamma=0.1)

# train, val, test setting
train_cfg = dict(by_epoch=True, max_epochs=200, val_interval=1)
val_cfg = dict()
test_cfg = dict()

# NOTE: `auto_scale_lr` is for automatically scaling LR
# based on the actual training batch size.
auto_scale_lr = dict(base_batch_size=128)