Support gather operation in NCCL backend 支持在 NCCL 后端进行 gather 操作

[OpenMMLab-Assistant-004]

Support gather operation in NCCL backend

支持在 NCCL 后端进行 gather 操作

Support gather operation in the NCCL backend. Since the NCCL backend does not natively support the gather operation, it is recommended to use torch.cuda.comm.gather in the gather_object_function to maintain compatibility. This task will address issue #84 ( open-mmlab/mmengine#84 ).

由于 nccl 后端不支持 gather 操作，因此最好在 gather_object 中使用 torch.cuda.comm.gather 来保持兼容性。此任务将解决问题＃84 open-mmlab/mmengine#84

Task Information

Repository：MMEngine

Difficulty：Medium

Points：30

Estimated Time Consumption：14 days

Task Status

Claimant's Github ID：None

Claim Time：None

PR Link：None

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