open-mmlab / open-mmlab/mmengine
加一张图介绍 rank、local_rank、world_size、local_size 的区别
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Description
可以加一张图介绍一下 rank、local_rank、world_size、local_size 的区别，参考 https://user-images.githubusercontent.com/875518/77676984-4c81e400-6f4c-11ea-87d8-f2ff505a99da.png
Originally posted by @zhouzaida in https://github.com/open-mmlab/mmengine/pull/45#discussion_r813498549
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