ColossalAI/examples/images/resnet

Train ResNet on CIFAR-10 from scratch

🚀 Quick Start

This example provides a training script and an evaluation script. The training script provides an example of training ResNet on CIFAR10 dataset from scratch.

• Training Arguments

  • -p, --plugin: Plugin to use. Choices: torch_ddp, torch_ddp_fp16, low_level_zero. Defaults to torch_ddp.
  • -r, --resume: Resume from checkpoint file path. Defaults to -1, which means not resuming.
  • -c, --checkpoint: The folder to save checkpoints. Defaults to ./checkpoint.
  • -i, --interval: Epoch interval to save checkpoints. Defaults to 5. If set to 0, no checkpoint will be saved.
  • --target_acc: Target accuracy. Raise exception if not reached. Defaults to None.

• Eval Arguments

  • -e, --epoch: select the epoch to evaluate
  • -c, --checkpoint: the folder where checkpoints are found

Install requirements

pip install -r requirements.txt

Train

The folders will be created automatically.

# train with torch DDP with fp32
colossalai run --nproc_per_node 2 train.py -c ./ckpt-fp32

# train with torch DDP with mixed precision training
colossalai run --nproc_per_node 2 train.py -c ./ckpt-fp16 -p torch_ddp_fp16

# train with low level zero
colossalai run --nproc_per_node 2 train.py -c ./ckpt-low_level_zero -p low_level_zero

Eval

# evaluate fp32 training
python eval.py -c ./ckpt-fp32 -e 80

# evaluate fp16 mixed precision training
python eval.py -c ./ckpt-fp16 -e 80

# evaluate low level zero training
python eval.py -c ./ckpt-low_level_zero -e 80

Expected accuracy performance will be:

Model	Single-GPU Baseline FP32	Booster DDP with FP32	Booster DDP with FP16	Booster Low Level Zero
ResNet-18	85.85%	84.91%	85.46%	84.50%

Note: the baseline is adapted from the script to use torchvision.models.resnet18