gossip_sgd.py [654:669]:
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    if args.backend == 'gloo':
        assert args.network_interface_type == 'ethernet'
        os.environ['GLOO_SOCKET_IFNAME'] = get_tcp_interface_name(
            network_interface_type=args.network_interface_type
        )
    elif args.network_interface_type == 'ethernet':
        if args.backend == 'nccl':
            os.environ['NCCL_SOCKET_IFNAME'] = get_tcp_interface_name(
                network_interface_type=args.network_interface_type
            )
            os.environ['NCCL_IB_DISABLE'] = '1'
        else:
            raise NotImplementedError

    # initialize torch distributed backend
    os.environ['MASTER_ADDR'] = args.master_addr
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gossip_sgd_adpsgd.py [679:694]:
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    if args.backend == 'gloo':
        assert args.network_interface_type == 'ethernet'
        os.environ['GLOO_SOCKET_IFNAME'] = get_tcp_interface_name(
            network_interface_type=args.network_interface_type
        )
    elif args.network_interface_type == 'ethernet':
        if args.backend == 'nccl':
            os.environ['NCCL_SOCKET_IFNAME'] = get_tcp_interface_name(
                network_interface_type=args.network_interface_type
            )
            os.environ['NCCL_IB_DISABLE'] = '1'
        else:
            raise NotImplementedError

    # initialize torch distributed backend
    os.environ['MASTER_ADDR'] = args.master_addr
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