Estimation of scalability of SDN controller`s latency on parallel computing system

In this article, we present a study of software-defined network`s controller latency scaling on parallel computing system. Metrics of parallel computing, such as speedup and efficiency, were determined. Amdahl`s law for multicore processors with thread-level parallelism has been considered. The range of applicability for Amdahl`s law has been established. The test bed and the methodology of experiments has been discussed in detail. Latency of OpenDaylight controller, which has been run on server with Intel Xeon central processor, has been measured by Cbench utility. As a result, the sequential fraction of OpenDaylight code, as well as speedup and efficiency has been calculated. It is concluded that the sequential fraction of code is increasing during experiment with a growth of number of processor core and it is necessary that a more thorough study of the phenomenon should be performed. The findings also indicates that Hyper-Threading technology is allow to reduce a latency of software-defined network`s controller and improve of efficiency of central processor usage.