This is a super common occurrence in training loops for ML models because PyTorch uses multiprocessing for its dataloader workers. If you want to read more, see

This is a super common occurrence in training loops for ML models because PyTorch uses multiprocessing for its dataloader workers. If you want to read more, see the discussion in this issue: https://github.com/pytorch/pytorch/issues/13246#issuecomment-905703662 https://github.com/pytorch/pytorch/issues/13246#issuecomment... As you’ve pointed out fork() isn’t ideal for a number of reasons and in general it’s preferred to use torch tensors directly instead of numpy arrays so that you are not forced into using fork() There’s also this write up which I found to be quite useful for details: https://ppwwyyxx.com/blog/2022/Demystify-RAM-Usage-in-Multiprocess-DataLoader/ https://ppwwyyxx.com/blog/2022/Demystify-RAM-Usage-in-Multip...