mindspore/example/resnet50_cifar10

ResNet-50 Example

Description

This is an example of training ResNet-50 with CIFAR-10 dataset in MindSpore.

Requirements

• Install MindSpore.

• Download the dataset CIFAR-10.

Unzip the CIFAR-10 dataset to any path you want and the folder structure should be as follows:

.  
├── cifar-10-batches-bin  # train dataset
└── cifar-10-verify-bin   # infer dataset

Example structure

.
├── config.py                       # parameter configuration
├── dataset.py                      # data preprocessing
├── eval.py                         # infer script
├── lr_generator.py                 # generate learning rate for each step
├── run_distribute_train.sh         # launch distributed training
├── run_infer.sh                    # launch infering
├── run_standalone_train.sh         # launch standalone training 
└── train.py                        # train script

Parameter configuration

Parameters for both training and inference can be set in config.py.

"class_num": 10,                  # dataset class num
"batch_size": 32,                 # batch size of input tensor
"loss_scale": 1024,               # loss scale
"momentum": 0.9,                  # momentum
"weight_decay": 1e-4,             # weight decay 
"epoch_size": 90,                 # only valid for taining, which is always 1 for inference 
"buffer_size": 100,               # number of queue size in data preprocessing
"image_height": 224,              # image height
"image_width": 224,               # image width
"save_checkpoint": True,          # whether save checkpoint or not
"save_checkpoint_steps": 195,     # the step interval between two checkpoints. By default, the last checkpoint will be saved after the last step
"keep_checkpoint_max": 10,        # only keep the last keep_checkpoint_max checkpoint
"save_checkpoint_path": "./",     # path to save checkpoint
"lr_init": 0.01,                  # initial learning rate
"lr_end": 0.00001,                # final learning rate
"lr_max": 0.1,                    # maximum learning rate
"warmup_epochs": 5,               # number of warmup epoch
"lr_decay_mode": "poly"           # decay mode can be selected in steps, ploy and default

Running the example

Train

Usage

# distribute training
Usage: sh run_distribute_train.sh [MINDSPORE_HCCL_CONFIG_PATH] [DATASET_PATH]

# standalone training
Usage: sh run_standalone_train.sh [DATASET_PATH]

Launch

# distribute training example
sh run_distribute_train.sh rank_table.json ~/cifar-10-batches-bin

# standalone training example
sh run_standalone_train.sh ~/cifar-10-batches-bin

About rank_table.json, you can refer to the distributed training tutorial.

Result

Training result will be stored in the example path, whose folder name begins with "train" or "train_parallel". Under this, you can find checkpoint file together with result like the followings in log.

# distribute training result(8p)
epoch: 1 step: 195, loss is 1.9601055
epoch: 2 step: 195, loss is 1.8555021
epoch: 3 step: 195, loss is 1.6707983
epoch: 4 step: 195, loss is 1.8162166
epoch: 5 step: 195, loss is 1.393667

Infer

Usage

# infer
Usage: sh run_infer.sh [DATASET_PATH] [CHECKPOINT_PATH]

Launch

# infer example
sh run_infer.sh ~/cifar10-10-verify-bin ~/resnet50_cifar10/train_parallel0/resnet-90_195.ckpt

checkpoint can be produced in training process.

Result

Inference result will be stored in the example path, whose folder name is "infer". Under this, you can find result like the followings in log.

result: {'acc': 0.91446314102564111} ckpt=~/resnet50_cifar10/train_parallel0/resnet-90_195.ckpt