Function apply_on_var_node

imperative/src/impl/ops/collective_comm.cpp:17–37

#if MGB_ENABLE_OPR_MM
namespace {
cg::OperatorNodeBase* apply_on_var_node(const OpDef& def, const VarNodeArray& inputs) {
    auto&& comm = def.cast_final_safe<CollectiveComm>();
    auto group_client = std::make_shared<opr::GroupClientProxy>(
            ssprintf("%s:%d", comm.addr.data(), comm.port));
    SmallVector<std::shared_ptr<mgb::DeviceTensorND>> dev_buffer_arr(1, nullptr);
    auto disable = std::make_shared<DTypeScalar>();
    disable->set(0);

    OperatorNodeConfig config{comm.make_name()};
    if (comm.comp_node.size() > 0) {
        config.comp_node(CompNode::load(comm.comp_node));
    }

    mgb_assert(inputs.size() == 1, "exactly one input expected");
    auto&& graph = inputs[0]->owner_graph();

    return graph->insert_opr(std::make_unique<opr::CollectiveComm>(
            inputs, graph, comm.key, comm.nr_devices, comm.is_root, comm.rank,
            comm.local_grad, group_client, comm.mode, comm.dtype, comm.backend,
            dev_buffer_arr, config, disable));
}

std::tuple<std::string, std::string> split_address(
        const std::string& address_and_port) {