[train_unconditional] fix applying clip_grad_norm_ #721
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prathikr
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Oct 26, 2022
fix clip_grad_norm_
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Fix gradient clipping when doing gradient accumulation. The gradients needs to clipped after they are synchronized when doing accumulation. cf huggingface/accelerate#641 (comment)
fixes #499
Although not sure why it only got triggered only in half-precision.