For the third factor of val_loader, the batch size value

[ohjunee]

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Question

I wonder why the third factor value is batch_size // WORLD_SIZE * 2.

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[github-actions]

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[glenn-jocher]

@ohjunee hi there! The value "batch size // WORLD_SIZE * 2" for the third factor of val_loader is set to help distribute the workload across multiple GPUs using DDP (DistributedDataParallel). This formula balances the processing load for efficient multi-GPU training. If you have further questions or need more clarification, please feel free to ask!