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Correct set backend name #15

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Correct set backend name #15

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4 changes: 4 additions & 0 deletions torch/distributed/distributed_c10d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1902,6 +1902,8 @@ def _new_process_group_helper(
# backend so we can correctly call getDefaultBackend which in ProcessGroup.
if Backend.NCCL in backend_config.get_device_backend_map().values():
pg._set_default_backend(ProcessGroup.BackendType.NCCL)
elif Backend.XCCL in backend_config.get_device_backend_map().values():
pg._set_default_backend(ProcessGroup.BackendType.XCCL)
else:
pg._set_default_backend(ProcessGroup.BackendType.GLOO)
else:
Expand All @@ -1911,6 +1913,8 @@ def _new_process_group_helper(
else:
if Backend.NCCL in backend_config.device_backend_map.values():
pg._set_default_backend(ProcessGroup.BackendType.NCCL)
elif Backend.XCCL in backend_config.device_backend_map.values():
pg._set_default_backend(ProcessGroup.BackendType.XCCL)
elif Backend._plugins.keys():
custom_backend = next(iter(Backend._plugins.keys()))
if custom_backend in backend_config.device_backend_map.values():
Expand Down