Optimizing Inter-Domain Communication

Virtual machine technology has played an important role in data center. Distributed services deployed in multiple virtual machines, may reside on one physical machine. This situation requires an efficient inter-domain communication channel with transparency and security principles ensured. Although current inter-domain mechanism has gained a much better performance compared to traditional inter-domain path offered by hypervisor, shared data channel size limitation and additional copy are still two restrains against a higher performance efficiency. In this paper, we give an analysis on these limitations, overcome these shortcomings, and achieve a higher efficient inter-domain communication channel. By applying virtual address protection mechanism during channel bootstrap, we enlarge the maximum size of shared data channel. By pointing network packet structure to the buffer in the shared data channel, we avoid an extra data copy on the receiver VM side. In our evaluation using a number of standard benchmarks, we have reduced the latency by nearly 40%, increased the throughput by approximately 45% and cut down more than 3500 CPU cycles per packet.