Method execute

src/opr/impl/muxing.cpp:58–66

        CopyInstr() = default;

        void execute() {
            src->wait_ready();
            if (cross_cn) {
                dst->var->comp_node().device_wait_event(*src->cn_ready_event);
            }
            dst->var->dev_tensor().sub(dst_sub).copy_from_fixlayout(
                    src->var->dev_tensor().sub(src_sub));
            dst->set_ready();
        }
    };

    AllGather* m_par_opr;