python python_single_gpu_unit_test.py python single_gpu_unit_test.py python test_batchnorm1d.py python -m torch.distributed.launch --nproc_per_node=2 two_gpu_unit_test.py python -m torch.distributed.launch --nproc_per_node=2 two_gpu_unit_test.py --fp16 python -m torch.distributed.launch --nproc_per_node=2 two_gpu_test_different_batch_size.py --apex #beware, you need a system with at least 4 gpus to test group_size