votes up 1

Distributed package doesn't have NCCL built in

github stars 50580
Exception Class:

Raise code

            if pg_options is not None:
                raise RuntimeError("GLOO options not supported")
            pg = ProcessGroupGloo(prefix_store, rank, world_size, timeout=timeout)
            _pg_map[pg] = (Backend.GLOO, store)
            _pg_names[pg] = group_name
        elif backend == Backend.NCCL:
            if not is_nccl_available():
                raise RuntimeError("Distributed package doesn't have NCCL " "built in")
            if pg_options is not None:
                assert isinstance(
                    pg_options, ProcessGroupNCCL.Options
                ), "Expected pg_options argument to be of type ProcessGroupNCCL.Options"
                # default pg_options for NCCL
                pg_options = ProcessGroupNCCL.Options()
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