更新colossalai的版本，并且修改源码中对新版本的bug，可以获得更好的性能

[lyx3911]

更新colossalai的版本为0.4.2，把opensora/utils/train_utils.py中line35的 master_param = optimizer._param_store.working_to_master_param[param_id] 修改为master_param = optimizer.working_to_master_param[param_id] 可以获得更好的性能，收益约10%， 因为新版本的colossalai对optimizer.step()的通信做了聚合，减少了通信的次数。

[github-actions[bot]]

This issue is stale because it has been open for 7 days with no activity.

[github-actions[bot]]

This issue was closed because it has been inactive for 7 days since being marked as stale.

[flymin]

@lyx3911 我这边单机测试几乎没有提升，能说下具体什么场景下有提速吗？是否需要 overlap_allgather 参数设置成 True？谢谢

[lyx3911]

我这边是多卡训练，stage1的时候提升挺明显的，stage2、3不太明显。主要是通信占比高的时候收益明显吧