Educational PyTorch repo for distributed training from scratch: DP, FSDP, TP, FSDP+TP, and PP

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I put together a small educational repo that implements distributed training parallelism from scratch in PyTorch: https://github.com/shreyansh26/pytorch-distributed-training-from-scratch Instead of using high-level abstractions, the code writes the forward/backward logic and collectives explicitly so you can see the algorithm directly. The model is intentionally just repeated 2-matmul MLP blocks on a synthetic task, so the communication patterns are the main thing being studied. Built this ma...