Update util.py
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@ -109,7 +109,7 @@ def checkpoint(func, inputs, params, flag):
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explicitly take as arguments.
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:param flag: if False, disable gradient checkpointing.
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"""
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if False: # disabled checkpointing to allow requires_grad = False for main model
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if flag: # disabled checkpointing to allow requires_grad = False for main model
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args = tuple(inputs) + tuple(params)
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return CheckpointFunction.apply(func, len(inputs), *args)
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else:
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