RuntimeError:Expected to have finished reduction in the prior iteration
解决办法：
添加find_unused_parameters=true
model=torch.nn.parallel.DistributedDataParallel(model,find_unused_parameters=true)
0
0
解决办法：
添加find_unused_parameters=true
model=torch.nn.parallel.DistributedDataParallel(model,find_unused_parameters=true)
