I’m using PyTorch under Win10, and when apply DataParallel to models, the following warning appears:

C:\Anaconda3\lib\site-packages\torch\cuda\nccl.py:27: UserWarning: PyTorch is not compiled with NCCL support
warnings.warn(‘PyTorch is not compiled with NCCL support’)


Is it because my pytorch was installed under Win10?
Does it slow down the program?